WO2012060356A1 - 歯科インプラント用の締め付け装置 - Google Patents
歯科インプラント用の締め付け装置 Download PDFInfo
- Publication number
- WO2012060356A1 WO2012060356A1 PCT/JP2011/075146 JP2011075146W WO2012060356A1 WO 2012060356 A1 WO2012060356 A1 WO 2012060356A1 JP 2011075146 W JP2011075146 W JP 2011075146W WO 2012060356 A1 WO2012060356 A1 WO 2012060356A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tightening
- torque
- change
- dental implant
- load
- Prior art date
Links
- 239000004053 dental implant Substances 0.000 title claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims description 59
- 210000000078 claw Anatomy 0.000 claims description 46
- 238000001514 detection method Methods 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000007943 implant Substances 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000004308 accommodation Effects 0.000 description 31
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- 210000003128 head Anatomy 0.000 description 7
- 210000000988 bone and bone Anatomy 0.000 description 6
- 210000000214 mouth Anatomy 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000037182 bone density Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0089—Implanting tools or instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
- A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
- A61C8/0074—Connecting devices for joining an upper structure with an implant member, e.g. spacers with external threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
- B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
- B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by electrical means
Definitions
- the present invention relates to a fastening device for a dental implant for screwing an abutment to a fixture.
- the bone in the oral cavity where the fixture is embedded differs in bone quality and bone density for each patient, as described above, when the abutment is screwed to the fixture with the same tightening torque value for all patients, In some patients, the abutment fixture may be too tight. In the worst case, a slip phenomenon such as peeling of the fixture and bone occurs, and re-operation is required. In addition, since the doctor visually confirms that the free end of the bending rod matches the tightening torque value on the scale in the oral cavity of the patient, an error may occur in the reading of the scale depending on the angle. This contributed to the induction of the slip phenomenon.
- the preset type torque wrench is the same as the plate type torque wrench.
- the preset type torque wrench may be too tight on the abutment fixture by the patient.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tightening device for a dental implant that can suppress the occurrence of a slip phenomenon in manual operation. .
- the fastening device for a dental implant of the present invention is a device for screwing an abutment to a fixture.
- the tightening device includes a torque wrench and a slip detection device.
- the torque wrench includes a tightening portion that can be engaged with the abutment, a wrench body having a head portion provided with the tightening portion, and a handle portion that can be manually operated, and the abutment screwed into the fixture.
- a tightening torque detector for detecting a tightening torque generated when wearing.
- the slip detection device includes a slip determination unit and a notification unit.
- the slip determination unit samples the amount or rate of change of the tightening torque detected by the torque detection unit every predetermined time t, and determines the amount of change or rate of change of the tightening torque in the previous predetermined period t.
- a change amount or change rate of the tightening torque in the predetermined period t immediately after the predetermined period t is sequentially compared, and it is determined whether or not the latter change amount or change rate is smaller than the former change amount or change rate.
- the slip determining unit determines that the latter change amount or change rate is smaller than the former change amount or change rate
- the notifying unit immediately tightens the abutment with respect to the fixture. Notify that there is.
- the abutment rotates with respect to the fixture during the tightening operation in which the abutment is engaged with the tightening part of the torque wrench and the handle part of the wrench body is manually operated to screw the abutment onto the fixture.
- the change amount or change rate of the tightening torque in the predetermined period t that is, the former change amount or change rate
- the change amount or change rate of the tightening torque in the predetermined period t that is, the latter change amount or change rate
- the slip determination unit samples a change amount or change rate of the tightening torque every predetermined time t, and determines that the latter change amount or change rate is smaller than the former change amount or change rate
- the notification unit is configured to notify the doctor that the tightening state is immediately before the occurrence of the slip phenomenon. For this reason, the doctor can stop the tightening of the abutment with respect to the fixture at the limit torque value immediately before the occurrence of the slip phenomenon in each individual patient, so that the occurrence of the slip phenomenon can be suppressed.
- the slip detection device includes an input unit capable of inputting patient specific information, a memory unit in which a plurality of tightening torque reference values corresponding to the patient specific information are recorded, and patient specific information input through the input unit. It is possible to further comprise a torque calculation unit that reads the tightening torque reference value corresponding to the above-mentioned from the memory unit and calculates the tightening torque based on the tightening torque reference value and the output signal of the torque detection unit. It is.
- the torque calculation unit calculates the tightening torque based on the torque reference value corresponding to the specific information of the patient and the output signal of the torque detection unit.
- the proper tightening torque of the patient can be obtained. Therefore, it is possible to improve the accuracy of the tightening operation for each patient.
- the notification unit notifies that the tightening state is immediately before the occurrence of a slip phenomenon when the slip determination unit determines that the latter change amount or change rate is smaller than the former change amount or change rate a predetermined number of times.
- a configuration is also possible. In order to screw the abutment onto the fixture, it is necessary to perform a tightening operation a plurality of times. Even during a tightening operation other than the last tightening operation, the slip determination unit samples the change amount or change rate of the tightening torque every predetermined time t, and the latter change amount or change rate is greater than the former change amount or change rate. When it determines with it being small, a alerting
- the slip determination unit determines that the latter change amount or change rate is smaller than the former change amount or change rate a predetermined number of times
- the notification unit causes the tightening state to cause a slip phenomenon. Since the notification is made immediately before, the false alarm can be reduced.
- the doctor can determine that the misreport is based on a hand feeling and a rule of thumb.
- the torque detection unit it is possible to use a load cell that converts a load applied to the tightening unit into an electrical signal when the abutment is screwed to the fixture.
- a display device capable of at least one of graph display and numerical display can be used.
- the graph display a torque curve indicating a change in tightening torque detected by the torque detector is displayed.
- the numerical display the tightening torque detected by the torque detector is displayed numerically.
- at least one of a buzzer and a light emitting device can be used as the notification unit.
- the display unit, the buzzer, and the light emitting device are selectively combined as the notification unit.
- the tightening portion is detachable from the head portion of the wrench body.
- the tightening portion can be replaced by preparing a plurality of types of tightening portions respectively corresponding to the plurality of types of abutments. It is possible. In other words, the tightening device can perform a plurality of types of abutment tightening operations only by replacing the tightening portion.
- the configuration of the slip determination unit and the notification unit is different from the configuration of the slip determination unit and the notification unit described above.
- the slip determination unit samples a change amount or change rate of the tightening torque detected by the torque detection unit every predetermined time t, and a change amount or change rate of the tightening torque value at the predetermined time t is obtained. It is determined whether or not it is within a predetermined range.
- the slip determining unit determines that the amount of change or rate of change of the tightening torque value within a predetermined time t is within a predetermined range, the notifying unit immediately before the occurrence of the slip phenomenon This is to be notified.
- the slip determination unit samples the amount or rate of change of the tightening torque every predetermined time t, and the amount of change or rate of change of the tightening torque value at the predetermined time t is within a predetermined range.
- the notification unit notifies the doctor that the tightening state is immediately before the occurrence of the slip phenomenon. For this reason, the doctor can stop the tightening of the abutment with respect to the fixture at the limit torque value immediately before the occurrence of the slip phenomenon in each individual patient, so that the occurrence of the slip phenomenon can be suppressed.
- the torque wrench further includes a torque transmitting portion provided in the wrench body and having a first end engaged with the tightening portion and a second end opposite to the first end. Can be configured.
- the torque detection unit is a load cell that is in contact with the second end of the torque transmission unit, receives a load applied to the tightening unit via the torque transmission unit, and converts it into an electrical signal for output. Is possible.
- the first end of the torque transmission portion is engaged with the tightening portion, and the second end of the torque transmission portion is in contact with the load cell. Therefore, a load applied to the tightening portion during the tightening operation is transmitted to the load cell via the torque transmitting portion, and the load cell converts the load into an electric signal and outputs the electric signal. Since it is possible to obtain a load (tightening torque) applied to the tightening portion during the tightening operation based on the electric signal of the load cell, the tightening operation can be performed while referring to the tightening torque value.
- the load cell may have a convex load portion.
- the second end portion of the torque transmitting portion may be provided with a recess into which the load portion of the load cell is inserted.
- a height dimension of the load portion is larger than a depth dimension of the concave portion.
- the load cell may have a concave load portion.
- a convex portion inserted into the load portion of the load cell is provided at the second end portion of the torque transmitting portion.
- the height dimension of the convex part is larger than the depth dimension of the load part.
- the convex portion of the torque transmitting portion is inserted into the concave load portion of the load cell and is in contact with the load portion. For this reason, the precision which the load concerning a fastening part at the time of a fastening operation
- the wrench body may have a front end portion provided with the head portion and a rear end portion.
- the second end portion of the torque transmitting portion can be configured to protrude from the rear end portion of the wrench body.
- the load cell is disposed behind the wrench body and is in contact with the second end portion. In the case of such an aspect of the invention, the load cell is arranged behind the wrench body, so that the wrench body can be downsized.
- the torque transmission portion may be configured to further include a claw portion provided at the first end portion and engageable with the ratchet groove. According to such an aspect of the invention, when the claw portion is pressed against the wall of the ratchet groove, the rotational torque of the tightening portion is transmitted to the torque transmitting portion.
- the torque wrench is externally fitted to the wrench body so as to be movable in the length direction, and is mounted between a sleeve attached to the load cell and a first stopper portion provided on the wrench body and the sleeve. It is possible to make it the structure further provided with the provided 1st biasing part. In this case, the tightening portion is rotatable with respect to the head portion.
- the torque transmission unit is accommodated in the wrench body so as to be movable in the length direction.
- the ratchet groove may have a first and second wall.
- the claw portion is in contact with the first wall and restricts the rotation of the tightening portion in the first direction, and an inclined surface that presses the second wall and moves the wrench body to the tip side. It is possible to have a configuration having
- the contact stop surface of the claw portion comes into contact with the first wall, and the rotation of the tightening portion in the first direction is restricted. Further, at the time of the tightening operation, the contact stop surface of the claw portion is pressed against the first wall, and the rotational torque of the tightening portion is transmitted to the torque transmitting portion. On the other hand, when the inclined surface of the claw is pressed against the second wall, the wrench body is moved to the tip side. Thereby, a nail
- the ratchet groove may have a first and second wall.
- the first wall has an abutment surface that abuts on the claw portion and restricts rotation of the tightening portion in the first direction.
- the second wall has an inclined surface that is pressed by the claw portion and moves the wrench body to the tip side.
- the claw portion comes into contact with the contact stop surface of the first wall, and the rotation of the tightening portion in the first direction is restricted. Further, during the tightening operation, the contact stop surface of the first wall presses the claw portion, and the rotational torque of the tightening portion is transmitted to the torque transmitting portion. On the other hand, when the inclined surface of the second wall is pressed by the claw portion, the wrench body moves to the tip side. Thereby, a nail
- the torque transmission part may further include a second stopper part.
- the torque wrench may further include a third stopper part and a second biasing part provided between the second and third stopper parts. According to such an aspect of the invention, the torque transmitting portion is urged toward the distal end side by the urging force of the second urging portion.
- the load cell may be configured to further include a protective wall that is erected around the load portion and has a height dimension larger than that of the load portion.
- a protective wall having a height dimension larger than that of the load portion is provided around the load portion. Therefore, the load portion is not necessary for the load portion by abutting against other members. Can prevent a heavy load.
- the slip detection device may further include a torque calculation unit that calculates a tightening torque of the tightening unit based on an output signal of a load cell of the torque wrench.
- FIG. 1 It is a block diagram of the clamping device for dental implants concerning Example 1 of the present invention. It is a schematic plan view including the partial cross section of the torque wrench of the said clamping device. It is a schematic front view which shows the said torque wrench, the abutment, and the fixture which the clamp
- FIG. 2 is a schematic exploded plan view including a partial cross section of the torque wrench.
- Example 1 and Example 2 of the present invention will be described.
- the fastening device shown in FIGS. 1, 2A and 2B is a fastening device for a dental implant in which an abutment 1 is screwed to a fixture 2.
- FIG. The tightening device includes a torque wrench W and a slip detection device D.
- the torque wrench W and the slip detection device D will be described in detail.
- the slip phenomenon described here refers to a phenomenon in which the fixture 2 and the bone (not shown) in the patient's oral cavity are separated, and the fixture 2 idles with respect to the bone.
- the torque wrench W includes a tightening portion 10, a wrench body 20, and a load cell 30 (torque detection portion).
- the tightening part 10 has an engaging part 11 and an attaching part 12.
- the engaging portion 11 is a portion that can be engaged with the abutment 1.
- the shape of the engaging portion 11 can be appropriately changed according to the shape of the engaged portion of the abutment 1.
- the engaged portion (not shown) of the abutment 1 is a hexagonal columnar convex portion
- the engaging portion 11 is provided with a hexagonal concave portion into which the convex portion can be fitted.
- the attachment portion 12 is a cylinder that is connected to the engagement portion 11. As shown in FIGS.
- a plurality of ratchet grooves 121 are formed on the outer peripheral surface of the attachment portion 12 at intervals in the circumferential direction ⁇ .
- the ratchet groove 121 has an abutment surface 121a perpendicular to the rotation axis P of the attachment portion 12, and an inclined surface 121b in which the outer diameter of the attachment portion 12 temporarily increases in the circumferential direction ⁇ of the attachment portion 12. Yes.
- the wrench body 20 includes a wrench body, a rod 23, a fixing portion 24, and a coil spring 25.
- the wrench body has a handle portion 22 and a head portion 21 that is connected to the distal end portion of the handle portion 22.
- the head portion 21 is provided with a cylindrical mounting hole 21a that penetrates the head portion 21 in the thickness direction.
- the outer diameter of the mounting hole 21 a is slightly larger than the outer diameter of the mounting portion 12 of the tightening portion 10. That is, the attachment portion 12 of the tightening portion 10 is detachably fitted in the attachment hole 21a. In this fitted state, the attachment portion 12 is rotatable in the circumferential directions ⁇ and ⁇ around the rotation axis P with respect to the head portion 21.
- the handle portion 22 is a long cylindrical body as shown in FIG. 2A.
- the handle portion 22 has the tip portion and a rear end portion that is manually operated. Inside the handle portion 22, there is provided an accommodation hole 22a that extends in the length direction and communicates with the attachment hole 21a.
- a rod 23 is accommodated in the accommodation hole 22 a of the handle portion 22.
- a thread groove is formed on the inner peripheral surface of the rear end portion of the accommodation hole 22a of the handle portion 22.
- a fixing portion 24 is screwed to the rear end portion of the accommodation hole 22a of the handle portion 22.
- the fixing portion 24 is a cylindrical body having a thread groove formed on the outer peripheral surface thereof.
- the rod 23 is a rod longer than the handle portion 22 and is provided between the front end portion, the rear end portion, and the front end portion and the rear end portion, and has an outer diameter larger than that of the front end portion and the rear end portion. It has a small small diameter portion 23a.
- the rear end portion of the rod 23 penetrates the fixing portion 24 and protrudes out of the handle portion 22.
- a knob 23 b is provided at the rear end portion of the handle portion 22.
- the coil spring 25 is concentrically fitted to the small diameter portion 23 a of the rod 23, and is interposed between the step portion around the small diameter portion 23 a of the rod 23 and the fixed portion 24 in a compressed state. That is, the coil spring 25 is accommodated in the accommodation hole 22a of the handle portion 22 together with the rod 23, and urges the rod 23 toward the head portion 21 side.
- the load cell 30 is provided at the tip of the rod 23 and is accommodated in the accommodation hole 22 a of the handle portion 22 together with the rod 23.
- the load cell 30 is a compression type load cell, and includes a load button 31 and a power / output cable 32.
- the load button 31 extends in the length direction of the handle portion 22, and the tip portion thereof has a wedge shape as shown in FIG. 2C.
- the distal end portion of the load button 31 protrudes from the accommodation hole 22 a of the handle portion 22 to the attachment hole 21 a of the head portion 21, and a plurality of ratchets of the attachment portion 12 of the tightening portion 10.
- the groove 121 is engaged with one of the ratchet grooves 121 and is in contact with the contact stop surface 121 a of the ratchet groove 121. Thereby, rotation to the circumferential direction (beta) with respect to the head part 21 of the attaching part 12 is controlled.
- the load of the tightening portion 10 is applied to the load button 31.
- the load button 31 receives the load, the load cell 30 changes the electric resistance value of the internal strain gauge, and outputs the change in the resistance value as an electric signal to the slip detection device D through the power supply / output cable 32. Yes. Further, the load cell 30 is supplied with power from the slip detection device D through the power supply / output cable 32.
- the tip end portion of the load button 31 is detached from the ratchet groove 121 along the inclined surface 121b of the ratchet groove 121 of the attachment portion 12, and the next ratchet groove 121 is inserted.
- the tightening portion 10 can be attached not only from the lower side of FIG. 2B but also from the upper side of the drawing.
- the slip detection device D includes an amplifier A, an A / D conversion unit C, a microcomputer 50, a memory unit 60, a setting input unit 70 (input unit), an external output unit 80, and liquid crystal display units 91 and 7 segments.
- a display unit 92 and a buzzer 93 (notification unit) are provided.
- the power source / output cable 32 of the load cell 30 is connected to the amplifier A, and the electric signal of the load cell 30 is amplified and output to the A / D conversion unit C.
- the A / D conversion unit C performs A / D conversion on the amplified electrical signal and outputs it to the microcomputer 50.
- the setting input unit 70 is capable of setting and inputting patient personal information, power on / off, and the like, and outputs these input data to the microcomputer 50.
- the personal information includes sex, age, bone density, and the like.
- the memory unit 60 a plurality of tightening torque reference values respectively corresponding to the personal information are recorded in advance.
- the memory unit 60 is a non-volatile memory and is interconnected to the bus line of the microcomputer 50.
- the tightening torque reference value is an optimum tightening torque according to sex, age, bone density, and the like.
- the microcomputer 50 has an input port, an output port, and an internal memory.
- An A / D converter C and a setting input unit 70 are connected to the input port of the microcomputer 50.
- An external output unit 80, a liquid crystal display unit 91, a 7-segment display unit 92, a buzzer 93, and the like are connected to the output port of the microcomputer 50.
- a slip determination program described later is recorded in the internal memory of the microcomputer 50.
- the microcomputer 50 performs functions as the torque calculation unit 51 and the slip determination unit 52 by sequentially processing the slip determination program.
- the liquid crystal display unit 91 displays a change in tightening torque on the time axis as a torque curve on the liquid crystal display of the operation panel shown in FIG.
- the 7-segment display unit 92 displays the tightening torque real value and peak hold value numerically on the 7-segment display of the operation panel.
- the microcomputer 50 starts processing of the slip determination program shown in FIG. Thereafter, when the doctor operates the setting input unit 70 to input and set the personal information of the patient (s1), the microcomputer 50 reads the torque reference values corresponding to the personal information from the memory unit 60 and records them in the internal memory. .
- the doctor engages the abutment 1 with the tightening portion 10 of the torque wrench W, engages the abutment 1 with the fixture 2 in this state, and tightens the handle portion 22 of the torque wrench W by applying hand force R.
- the tip end portion of the load button 31 of the load cell 30 is in contact with the contact stop surface 121a of the ratchet groove 121 of the tightening portion 10, the tightening portion 10 rotates in the circumferential direction ⁇ together with the abutment 1, thereby causing the abutment 1 to move. Tightened to the fixture 2 and gradually increases the resistance to the tightening force.
- a moment (torque) Q that rotates around the head portion 21 with respect to the tightening portion 10 is generated due to a drag force generated against the tightening force R that tightens the abutment 1, and the load cell 30 causes the load button 31 to move.
- the load is received from the tightening portion 10 through the via.
- the load is converted into an electric signal by the load cell 30, the electric signal is amplified by the amplifier A, and A / D converted by the A / D converter C.
- the microcomputer 50 performs a predetermined calculation based on the electric signal and the tightening torque reference value to calculate the tightening torque (s3), and the tightening torque.
- the real value and the peak value of the tightening torque are output to the 7-segment display unit 92 and the tightening torque is output to the liquid crystal display unit 91, respectively.
- the real value and the peak value of the tightening torque are numerically displayed on the 7-segment display unit 92 (s4, s5), and the change in the tightening torque is graphically displayed on the liquid crystal display unit 91 as a torque curve as shown in FIG. (S6).
- the microcomputer 50 samples the amount of change in the tightening torque every predetermined period t (t1 to tn), and the amount of change (increase amount) in the previous predetermined period t and the predetermined period t immediately thereafter.
- the amount of change (increase amount) of the tightening torque is sequentially compared, and it is determined whether the latter amount of change is smaller than the former amount of change (s7). In this determination, if it is determined that the latter change amount is smaller than the former change amount, the microcomputer 50 sounds the buzzer 93 (s8).
- the first embodiment as shown in FIG.
- the change amount of the tightening torque in the period t5 is smaller than the change amount of the tightening torque in the period t4, and the change amount of the tightening torque in the period t10 is the change amount of the tightening torque in the period t9.
- the change amount of the tightening torque in the period t14 is smaller than the change amount of the tightening torque in the period t13.
- the abutment 1 rotates with respect to the fixture 2 and its resistance (drag) is improved, so that the torque curve rises sharply (the amount of change in tightening torque is large).
- the abutment 1 hardly rotates with respect to the fixture 2, and the resistance (drag) of the abutment 1 with respect to the fixture 2 changes. Since the torque curve is small, the torque curve moves substantially horizontally (the amount of change in tightening torque is small).
- the abutment 1 is screwed to the fixture 2 and hardly rotates, and the change in resistance (drag) of the abutment 1 to the fixture 2 is small.
- the torque curve moves substantially horizontally (the amount of change in tightening torque is small).
- the setting input unit 70 is operated to input setting for ending the tightening operation (s9).
- the microcomputer 50 reads the tightening torque recorded in the memory unit 60. Print output to the printer through the external output unit 93 (s11).
- the microcomputer 50 reads the tightening torque recorded in the memory unit 60 and outputs the tightening torque to the recording unit such as a USB memory through the external output unit 93 ( s13).
- the tightening torque data output format is not limited to the CSV output, and can be output in any other data format.
- the output target of the tightening torque is not limited to a recording unit such as a USB memory, and can be output to various electronic devices such as a PC and an electronic medical record system.
- the microcomputer 50 detects that the amount of change in the tightening torque during the predetermined period t is smaller than the amount of change in the tightening torque immediately after the predetermined period t.
- the microcomputer 50 detects that the tightening state of the abutment 1 with respect to the fixture 2 in each individual patient is immediately before the occurrence of the slip phenomenon. Therefore, since the abutment 1 can be screwed to the fixture 2 with the limit torque value immediately before the occurrence of the slip phenomenon of each patient, the occurrence of the slip phenomenon can be suppressed.
- the microcomputer 50 performs a predetermined calculation based on the tightening torque reference value according to the patient's personal information and the electric signal of the load cell 30, and obtains the tightening torque.
- the proper tightening torque of the patient can be obtained. Therefore, it is possible to improve the accuracy of the tightening operation for each patient.
- the tightening device shown in FIG. 6 has the same configuration as the tightening device of the first embodiment except that the configuration of the torque wrench W ′ is different from the configuration of the torque wrench W of the first embodiment.
- the torque wrench is distinguished from the torque wrench W of the first embodiment by attaching '.
- the torque wrench W ′ includes a tightening portion 10 ′, a wrench body 20 ′, a load cell 30 ′ (torque detecting portion), a sleeve 41 ′, and a coil spring 42 ′ (first first). Urging unit).
- the tightening portion 10 ′ is different from the shape of the ratchet groove 121 ′ provided in the outer peripheral surface of the attachment portion 12 ′ in the shape of the ratchet groove 121 of the first embodiment.
- the structure is the same as that of the tightening unit 10.
- the ratchet groove 121 ' is an arcuate recess as shown in FIG. 7B.
- the ratchet groove 121 ′ includes a first wall 122 a ′ on the circumferential direction ⁇ side and a second wall 122 b ′ on the circumferential direction ⁇ side.
- the wrench body 20 ′ includes a wrench body, a torque transmission portion 23 ′, a fixing portion 24 ′, and a coil spring 25 ′ (second urging portion).
- the head part 21 ′ and the handle part 22 ′ of the wrench body have substantially the same configuration as the head part 21 and the handle part 22 of the wrench body of the first embodiment.
- the head portion 21 ' corresponds to the front end portion of the wrench body, and the rear end portion of the handle portion 22' corresponds to the rear end portion of the wrench body.
- the torque transmission portion 23 ′ is a rod extending in the length direction of the wrench body, and is accommodated in the accommodation hole 22 a ′ of the wrench body so as to be movable in the length direction.
- the length dimension of the torque transmission portion 23 ' is larger than the length dimension of the accommodation hole 22a'.
- the torque transmission part 23 ′ has a first end part 23a ′, a second end part 23b ′, and an intermediate part 23c ′ provided between the first end part 23a ′ and the second end part 23b ′. is doing.
- the intermediate part 23c is a cylinder having an outer diameter smaller than the diameter of the accommodation hole 22a '.
- First and second cut portions 23c1 ' are provided at the upper and lower ends of the intermediate portion 23c' on the first end portion 23a 'side.
- the first end portion 23a ' is a cylinder having an outer diameter smaller than that of the intermediate portion 23c'.
- the first end portion 23a 'and the intermediate portion 23c' are accommodated in the accommodation hole 22a '.
- a triangular claw portion 23a1 ' is provided at the tip of the first end portion 23a'.
- the claw portion 23a1 ' has an abutment surface 23a11' and an inclined surface 23a12 '.
- a first protrusion (not shown) provided on the upper inner wall of the wrench body housing hole 22a ′ is fitted into the first cut part 23c1 ′, and the second cut part 23c1 ′ is fitted into the wrench body housing hole 22a ′.
- a second projection (not shown) provided on the inner wall on the lower side is fitted.
- the claw portion 23a1 ′ protrudes from the accommodation hole 22a ′ of the handle portion 22 ′ into the mounting hole 21a ′ of the head portion 21 ′ and is one of the ratchet grooves 121 ′ of the mounting portion 12 ′ of the tightening portion 10 ′. It is engaged with the groove 121 ′.
- the contact stop surface 23a11 'of the claw portion 23a1' is in contact with the first wall 122a 'of the ratchet groove 121'.
- the rotation of the mounting portion 12 ′ in the circumferential direction ⁇ (first direction) relative to the head portion 21 ′ is restricted.
- the tightening portion 10 ′ is allowed to rotate in the circumferential direction ⁇ (second direction) with respect to the head portion 21 ′. Specifically, when the tightening portion 10 ′ rotates in the circumferential direction ⁇ with respect to the head portion 21 ′ with the sleeve 41 ′ attached to the load cell 30 ′ as will be described later, the ratchet groove 121 of the tightening portion 10 ′. The 'second wall 122b' presses the inclined surface 23a12 'of the claw portion 23a1'.
- the wrench body moves to the tip side against the urging force of the coil spring 42 'and the coil spring 25', and the claw portion 23a1 'is released from the ratchet groove 121'. Thereafter, when the claw portion 23a1 'is inserted into the next ratchet groove 121', the wrench body moves to the rear end side by the urging force of the coil spring 42 'and the coil spring 25'.
- the tightening portion 10 ′ rotates in the circumferential direction ⁇ with respect to the head portion 21 ′. Is allowed.
- the tightening portion 10 ′ can be attached not only from the lower side of FIG. 7B but also from the upper side of the drawing.
- the rotation restricting direction and the allowable direction of the tightening portion 10 ′ can be reversed.
- the second and first protrusions in the accommodation hole 22a 'of the wrench body are fitted into the first and second cut portions 23c1' of the torque transmission portion 23 '.
- the contact stop surface 23a11 'of the claw portion 23a1' is directed to the circumferential direction ⁇ side
- the inclined surface 23a12 ' is directed to the circumferential direction ⁇ side.
- the second end portion 23b ' is a cylinder having an outer diameter smaller than that of the first end portion 23a' and the intermediate portion 23c '.
- the second end 23b ' has a screw part (not shown). This screw portion is screwed into a screw hole (not shown) of the intermediate portion 23c '.
- the second end portion 23b ′ has a front end portion accommodated in the accommodation hole 22a ′ of the handle portion 22 ′ and a rear end portion protruding rearward from the accommodation hole 22a ′ (that is, the rear end portion of the wrench body). is doing.
- a frustoconical stopper 23b1 ' is provided at the rear end of the second end 23b'.
- a circular recess 23b2 ' is provided on the rear end surface of the second end 23b'.
- the fixing portion 24 ′ is externally fitted to the distal end portion of the stopper 23b1 ′ of the second end portion 23b ′ of the torque transmission portion 23 ′ so as to be movable in the length direction.
- the fixing portion 24 ' has a cylinder 24a' and a lid 24b '.
- the inner diameter of the cylinder 24a ' is larger than the outer diameter of the second end 23b'.
- a cylinder 24a ' is externally fitted to the second end 23b' of the torque transmitting portion 23 'so as to be movable in the length direction. Movement beyond a predetermined distance toward the rear end of the cylinder 24a 'is restricted by the stopper 23b1'.
- the cylinder 24a has a front end portion, a rear end portion, and an intermediate portion therebetween.
- a thread groove is formed on the outer peripheral surface of the tip of the cylinder 24a.
- the thread groove of the cylinder 24a ' is screwed into the thread groove on the inner peripheral surface of the rear end portion of the accommodation hole 22a' of the handle portion 22 '.
- the lid 24b ' is a disc provided in the middle part of the cylinder 24a'.
- the outer diameter of the lid 24b ' is larger than the outer diameter of the handle portion 22' of the wrench body.
- the lid 24b ' closes the rear end side of the accommodation hole 22a' of the handle portion 22 'while the cylinder 24a' is screwed into the rear end portion of the accommodation hole 22a 'of the handle portion 22'.
- the coil spring 25 ′ is externally fitted to the distal end portion of the second end portion 23b ′ of the torque transmitting portion 23 ′ so as to be movable in the length direction, and is fixed to the fixing portion 24 ′ and the torque. It is interposed in a compressed state between the intermediate portion 23c ′ of the transmission portion 23 ′.
- the coil spring 25 ′ is accommodated in the accommodation hole 22 a ′ of the handle portion 22 ′ together with the torque transmission portion 23 ′, and biases the torque transmission portion 23 ′ toward the distal end side (head portion 21 ′ side).
- the intermediate portion 23c 'of the torque transmitting portion 23' corresponds to a second stopper portion and the fixing portion 24 'corresponds to a third stopper portion.
- the load cell 30 ′ is disposed behind the wrench body and abuts on the second end 23 b ′ of the torque transmission unit 23 ′.
- the load cell 30 ' includes a load cell portion 31', a power / output cable 32 ', and a body 33'.
- the body 33 ' has a cylindrical shape and is provided with a load cell portion 31' at the tip.
- the end portion of the power / output cable 32 ' is inserted into the body 33' and connected to the load cell portion 31 '.
- a screw groove is formed on the outer peripheral surface of the distal end portion of the body 33 '. This thread groove is screwed into the thread groove on the inner peripheral surface of the sleeve 41 '.
- the load cell portion 31 ' is a disk-shaped compression type load cell.
- the load cell portion 31 ′ has a load portion 31 a ′ and a protective wall 31 b ′.
- the load portion 31a ' is a circular convex load button, and is provided at the center of the top surface of the load cell portion 31'.
- the outer diameter of the load portion 31a ' is slightly smaller than the inner diameter of the recess 23b2' of the torque transmission portion 23 '.
- the height dimension of the load portion 31a ' is larger than the depth dimension of the concave portion 23b2' of the torque transmission portion 23 '.
- the load portion 31 a ′ With the body 33 ′ attached to the sleeve 41 ′, the load portion 31 a ′ is fitted in the recess 23 b 2 ′ of the torque transmission portion 23 ′ and is in contact with the second end portion 23 b ′ of the torque transmission portion 23 ′. .
- the load cell portion 31 ′ converts the load into an electric signal and transmits it to the slip detection device D through the power source / output cable 32 ′. Output is possible.
- the protective wall 31b ' is a cylindrical wall provided around the load portion 31a' on the top surface of the load cell portion 31 '.
- the height dimension of the protective wall 31b ' is larger than the height dimension of the load portion 31a'. Therefore, the protective wall 31b ′ prevents the load portion 31a ′ from coming into contact with another member (for example, a work desk or the like) in a state where the body 33 ′ of the load cell 30 ′ is removed from the sleeve 41 ′. . Thereby, it is possible to prevent an unnecessary load from being applied to the load portion 31a 'in the above-described removal state.
- the sleeve 41 ′ is a cylinder that is externally fitted to the handle portion 22 ′ of the wrench body so as to be movable in the length direction.
- a disc-shaped flange 41a ' is provided at one end of the sleeve 41' in the length direction.
- the inner diameter of the flange 41a ' is larger than the outer diameter of the handle portion 22' and smaller than the outer diameter of the lid 24b 'of the fixing portion 24'.
- the inner diameter of the sleeve 41 ′ other than the flange 41 a ′ is slightly larger than the outer diameter of the lid 24 b ′ and is substantially the same as the outer diameter of the tip of the body 33 ′ of the load cell 30 ′.
- a thread groove is formed on the inner peripheral surface of the other end portion in the length direction of the sleeve 41 '.
- the thread groove of the body 33 ′ of the load cell 30 ′ is screwed into the thread groove of the sleeve 41 ′.
- the lid 24b of the load cell 31 and the load cell portion 31 'of the load cell 30' are accommodated in the sleeve 41 ', and the second end portion 23b' of the torque transmitting portion 23 'is in contact with the load portion 31a' of the load cell portion 31 '. Maintained at.
- the coil spring 42 ′ is externally fitted to the handle portion 22 ′ of the wrench body so as to be movable in the length direction, and is accommodated in the sleeve 41 ′.
- the coil spring 42 ′ is interposed in a compressed state between the flange 41 a ′ of the sleeve 41 ′ and the lid 24 b ′ of the fixing portion 24 ′, and biases the lid 24 b ′ toward the rear end side.
- the second end portion 23b 'of the torque transmitting portion 23' is pressed against the load cell portion 31 '(ie, the load cell portion 31' is preloaded).
- a procedure for assembling the torque wrench W ′ of the tightening device configured as described above will be described in detail.
- a wrench body and a sleeve 41 ' are prepared.
- the handle portion 22 'of the wrench body is inserted into the sleeve 41'.
- a coil spring 42 ' is prepared.
- the handle portion 22 'of the wrench body is inserted into the coil spring 42'.
- the coil spring 42 ′ is inserted into the sleeve 41 ′, and one end of the coil spring 42 ′ in the length direction comes into contact with the flange 41 a ′ of the sleeve 41 ′.
- a second end 23b 'of the torque transmission part 23', a fixing part 24 'and a coil spring 25' are prepared. Thereafter, the second end portion 23b 'is inserted into the fixing portion 24' and the coil spring 25 '. Then, the fixing portion 24 ′ comes into contact with the stopper 23 b 1 ′ of the second end portion 23 b ′. Thereafter, a first end portion 23a 'and an intermediate portion 23c' of the torque transmission portion 23 'are prepared. Thereafter, the screw portion of the second end portion 23b 'is screwed into the screw hole of the intermediate portion 23c'. Then, the coil spring 25 'is compressed between the intermediate portion 23c' and the fixed portion 24 '.
- the tip portions of the torque transmission part 23 ′, the coil spring 25 ′ and the fixing part 24 ′ are inserted into the accommodation hole 22a ′ of the wrench body, and the fixing part 24 ′ is screwed into the rear end part of the accommodation hole 22a ′ of the wrench body.
- the lid 24b 'of the fixing portion 24' closes the rear end side of the accommodation hole 22a 'of the wrench body. Since the outer diameter of the lid 24b 'is larger than the outer diameter of the handle portion 22' of the wrench body, the outer peripheral edge (first stopper) of the lid 24b 'protrudes from the handle portion 22' in the outer circumferential direction.
- the torque transmission portion 23 ′ is rotated in the accommodation hole 22a ′ of the wrench body, and the first and second projections in the accommodation hole 22a ′ are formed on the first and second cut portions 23c1 ′ of the torque transmission portion 23 ′.
- the claw portion 23a1 ′ of the first end portion 23a ′ of the torque transmission portion 23 ′ protrudes from the accommodation hole 22a ′ of the handle portion 22 ′ into the mounting hole 21a ′ of the head portion 21 ′ and the claw portion 23a1 ′.
- the contact stop surface 23a11 ′ faces toward the circumferential direction ⁇
- the inclined surface 23a12 ′ faces toward the circumferential direction ⁇ .
- the load cell 30 ' is prepared. Thereafter, the load portion 31a 'of the load cell 30' is inserted while being aligned with the concave portion 23b2 'of the second end portion 23b' of the torque transmission portion 23 '. In this state, the sleeve 41 ′ and the coil spring 42 ′ are moved relatively to the rear end side with respect to the wrench body, and the sleeve 41 ′ is screwed to the body 33 ′ of the load cell 30 ′.
- the coil spring 42 ′ is compressed between the flange 41 a ′ of the sleeve 41 ′ and the outer peripheral edge of the lid 24 b ′ of the fixing portion 24 ′, and urges the lid 24 b ′ to the rear end side.
- the second end portion 23b 'of the torque transmitting portion 23' is pressed against the load cell portion 31 ', and the load cell portion 31' is preloaded.
- the attachment portion 12 'of the tightening portion 10' is fitted into the attachment hole 21a 'of the head portion 21'. Then, the claw portion 23a1 'of the torque transmitting portion 23' is inserted into and engaged with one ratchet groove 121 'of the plurality of ratchet grooves 121' of the attachment portion 12 'of the tightening portion 10'. Thereafter, the power / output cable 32 ′ of the load cell 30 ′ is connected to the slip detection device D.
- the microcomputer 50 starts processing of the slip determination program. Thereafter, when the doctor operates the setting input unit 70 to input and set the personal information of the patient (s1), the microcomputer 50 reads the torque reference values corresponding to the personal information from the memory unit 60 and records them in the internal memory. .
- the doctor engages the abutment 1 with the tightening portion 10 ′ of the torque wrench W ′, engages the abutment 1 with the fixture 2 in this state, and applies the manual force R to the handle portion 22 ′ of the torque wrench W ′. And start tightening work.
- the wrench body 20 ′ of the torque wrench W ′ rotates in the circumferential direction ⁇ about the rotation axis P.
- the contact surface 23a11 ′ of the claw portion 23a1 ′ of the torque transmitting portion 23 ′ is in contact with the first wall 122a ′ of the ratchet groove 121 ′ of the tightening portion 10 ′ (that is, the rotation in the circumferential direction ⁇ is restricted).
- the tightening portion 10 ′ rotates in the circumferential direction ⁇ together with the wrench body 20 ′ and the abutment 1.
- the abutment 1 is fastened to the fixture 2 and the resistance against the gradually tightening force increases.
- a moment (rotational torque) Q that rotates around the head portion 21 ′ with respect to the tightening portion 10 is generated by a drag force generated against the tightening force R that tightens the abutment 1.
- the contact stop surface 23a11 ′ of the claw portion 23a1 ′ of the torque transmission portion 23 ′ is pressed against the first wall 122a ′ of the ratchet groove 121 ′ of the tightening portion 10 ′, and the second end portion of the torque transmission portion 23 ′.
- 23b ′ applies a load to the load portion 31a ′ of the load cell 30 ′.
- the load is converted into an electric signal by the load cell 30 ′, the electric signal is amplified by the amplifier A, and A / D converted by the A / D converter C.
- the microcomputer 50 When the A / D converted electric signal is input (s2), the microcomputer 50 performs a predetermined calculation based on the electric signal and the tightening torque reference value to calculate the tightening torque (s3), and the tightening torque.
- the real value and the peak value of the tightening torque are output to the 7-segment display unit 92 and the tightening torque is output to the liquid crystal display unit 91, respectively.
- the real value and the peak value of the tightening torque are numerically displayed on the 7-segment display unit 92 (s4, s5), and the change of the tightening torque is graphically displayed on the liquid crystal display unit 91 as a torque curve (s6).
- the coil spring 42 ′ is compressed between the flange 41 a ′ of the sleeve 41 ′ and the lid 24 b ′ of the fixing part 24 ′, and the coil spring 25 ′ is between the fixing part 24 ′ and the intermediate part 23 c ′ of the torque transmission part 23 ′. Compressed between. Thereafter, when the claw portion 23a1 'is inserted into the next ratchet groove 121', the wrench body moves to the rear end side by the urging force of the coil spring 42 'and the coil spring 25'.
- the tightening portion 10 ′ and the abutment 1 are connected to the wrench body 20 ′ head portion. It rotates in the circumferential direction ⁇ relative to 21 ′.
- the above tightening operation is performed three times.
- the microcomputer 50 performs slip detection in the same manner as in the first embodiment (s7), and when slip detection is performed, performs the processing from s8 to s13 in the same manner as in the first embodiment.
- the same effect as in the first embodiment can be obtained.
- the first end portion 23a ′ of the torque transmission portion 23 ′ which is a rod, is engaged with the ratchet groove 121 ′ of the tightening portion 10 ′, and the second end portion 23b ′ of the torque transmission portion 23 ′ is connected to the load cell 30 ′. It is in contact. Therefore, during a tightening operation, a load (rotational torque) applied to the tightening portion 10 ′ is transmitted to the load cell 30 ′ via the torque transmission portion 23 ′, and the load cell 30 ′ converts the load into an electrical signal and outputs it.
- the tightening torque is calculated by the microcomputer 50 (torque calculation unit 51) based on the electric signal, the real value and the peak value of the tightening torque are numerically displayed on the 7-segment display unit 92, and the change in the tightening torque is displayed by the liquid crystal display unit 91.
- the graph is displayed as a torque curve. Therefore, it is possible to appropriately perform the tightening operation while referring to the real value of the tightening torque, the peak value of the tightening torque, and the change of the tightening torque.
- the convex load portion 31a 'of the load cell 30' is inserted into the concave portion 23b2 'of the second end portion 23b' of the torque transmitting portion 23 'and is in contact with the second end portion 23b'. Therefore, since the accuracy of the load of the tightening portion 10 ′ received via the torque transmission portion 23 ′ can be improved, the detection accuracy of the tightening torque of the tightening portion 10 ′ can be improved.
- the load cell 30 ' is fixed to the rear of the wrench body by the sleeve 41', the wrench body can be reduced in size. Therefore, it becomes easy to perform the tightening operation in a state where the wrench body is placed in the oral cavity of the patient.
- the fastening device described above is not limited to the first and second embodiments, and can be arbitrarily changed in design within the scope of the claims. Details will be described below.
- the torque wrench W includes the tightening unit 10, the wrench body 20, and the load cell 30 (torque detection unit).
- the torque wrench W ′ includes the tightening portion 10 ′, the wrench body 20 ′, the load cell 30 ′ (torque detection portion), the sleeve 41 ′, and the coil spring 42 ′ (first urging portion).
- the torque wrench includes a tightening portion, a wrench body having a head portion provided with the tightening portion, a handle portion that can be manually operated, and a tightening torque detecting portion that detects the tightening torque of the tightening portion. It is possible to change the design as long as possible. That is, components other than the tightening part of the torque wrench, the wrench body, and the torque detection part can be omitted.
- the tightening portion is detachable and rotatable with respect to the head portion, but is not limited thereto.
- the tightening portion is provided rotatably on the head portion.
- one tightening portion is detachably attached to the head portion.
- a plurality of types of tightening portions corresponding to a plurality of types of abutments can be detachably attached to the head portion. It is. In this case, only by replacing the tightening portion according to the abutment, the tightening device can perform a tightening operation of a plurality of types of abutments.
- the torque transmission portion 23 ′ has a first end portion 23a ′ engaged with the ratchet groove 121 ′ of the tightening portion 10 ′ and a second end portion 23b ′ that abuts on the load cell 30 ′.
- the length of the torque transmission portion 23 ′ is assumed to be a rod larger than the length of the accommodation hole 22a ′ of the wrench body.
- the torque transmission portion is arbitrarily designed as long as it has a first end portion provided in the wrench body and engaged with the tightening portion, and a second end portion opposite to the first end portion. It is possible to change.
- the shape of the torque transmitting portion can be a shape other than the rod.
- the length dimension of the torque transmitting portion can be made smaller than the length dimension of the accommodation hole of the wrench body. That is, it is possible to change the design so that the entire torque transmission part is accommodated in the accommodation hole of the wrench body.
- the claw portion 23a1 'of the first end portion 23a' of the torque transmission portion 23 ' has the contact stop surface 23a11' and the inclined surface 23a12 '.
- the first wall 122a 'of the ratchet groove 121' may have a contact stop surface and the second wall 122b 'may have an inclined surface.
- claw part does not need to be a triangle-shaped protrusion, For example, it can be set as a rectangular-shaped protrusion.
- the rotation of the tightening portion 10 ′ in the circumferential direction ⁇ is restricted by the contact surface of the first wall 122 a ′ coming into contact with the claw portion.
- the contact stop surface of the first wall 122a ' presses the claw portion, and the rotational torque of the tightening portion is transmitted to the torque transmission portion 23'.
- the inclined surface of the second wall 122b ' is pressed by the claw portion, and the wrench body moves to the tip side.
- the claw portion is detached from the ratchet groove 121 ′, and rotation of the tightening portion 10 ′ in the second direction opposite to the first direction with respect to the head portion 21 ′ is allowed.
- Example 2 the load cell 30 'is fixed to the rear of the wrench body using the sleeve 41'.
- the design of the attachment mechanism of the load cell to the wrench body can be arbitrarily changed.
- the design of the load cell 30 ′ can be changed so as to be accommodated in the accommodation hole of the wrench body.
- the design can be changed so that the load cell is fixed to the rear end portion of the wrench body. In these cases, the sleeve 41 and the coil spring 42 can be omitted.
- the load cell 30 ' has the protective wall 31b'.
- the protective wall 31b ' can be omitted.
- it can be set as the structure by which the some protective wall was provided around the convex load part of the load cell.
- Example 1 the coil spring 42 ′ is interposed in a compressed state between the flange 41 a ′ of the sleeve 41 ′ and the lid 24 b ′ of the fixing portion 24 ′.
- the design of the first urging portion such as the coil spring 42 ′ can be arbitrarily changed as long as it is provided between the sleeve and the first stopper portion provided on the wrench body.
- Example 2 the coil spring 25 'is interposed between the fixed portion 24' and the intermediate portion 23c 'of the torque transmitting portion 23' in a compressed state.
- the coil spring 25 ' can be omitted.
- the coil spring 42 biasses the lid 24b' of the fixing portion 24 'backward, and the fixing portion 24' contacts the stopper 23b1 'of the second end portion 23b' of the torque transmitting portion 23 '. By contact, the second end 23b ′ is pressed against the load cell 30 ′.
- the claw portion 23a1' of the first end portion 23a 'of the torque transmitting portion 23' protrudes from the accommodation hole 22a 'of the handle portion 22' into the mounting hole 21a 'of the head portion 21'.
- the coil spring 25 ′ and the coil spring 42 ′ can be replaced with other well-known urging means such as a cylindrical rubber or a leaf spring.
- the load cell is used as the torque detection unit, but the present invention is not limited to this.
- a strain body and strain gauge that detect the tightening torque of the tightening portion
- a piezoelectric element that detects the tightening torque of the tightening portion as pressure
- a magnetic sensor that detects the tightening torque using the Hall effect, and the like. is there.
- the microcomputer 50 is configured to sound the buzzer 93 when the latter change amount is smaller than the former change amount.
- the microcomputer 50 counts the number of times the latter counter determines whether or not the latter change amount is smaller than the former change amount, and the counter reaches a predetermined number (three times in the first embodiment).
- the design can be changed so that the notification unit such as the buzzer 93 is activated. In this case, since the doctor does not need to confirm the authenticity of the notification of the notification unit that operates every time the tightening operation is completed, the convenience of the tightening device is improved.
- the microcomputer 50 samples the amount of change in the tightening torque every predetermined period t (t1 to tn), and the amount of change in the tightening torque in the predetermined period t and the predetermined period t immediately thereafter.
- the change amount of the tightening torque was sequentially compared, and it was determined whether or not the latter change amount was smaller than the former change amount.
- the microcomputer 50 samples the change rate of the tightening torque every predetermined period t (t1 to tn), and the change rate (increase rate) of the tightening torque in the predetermined period t and the predetermined period t immediately thereafter.
- the microcomputer 50 samples the amount or rate of change of the tightening torque every predetermined time t, and the amount of change (increase amount) or rate of change (increase rate) of the tightening torque value at the predetermined time t is within a predetermined range. It is possible to change the design to a configuration that determines whether the amount is an amount (amount of increase) or a rate of change (a rate of increase).
- the notification unit such as the buzzer 93 is such that the change amount or rate of change of the tightening torque value at the predetermined time t is within a predetermined range (for example, as shown in t5, t10, and t14 in FIG. 5).
- a predetermined range for example, as shown in t5, t10, and t14 in FIG. 5.
- the design can be changed so as to notify that the tightening state of the abutment with respect to the fixture is immediately before the occurrence of the slip phenomenon. Even in this case, it is possible to change the design so that the notification unit operates when it is determined a predetermined number of times that the change amount or change rate of the tightening torque value within the predetermined time t is within the predetermined range.
- the value of the predetermined range of the change amount or change rate of the tightening torque is recorded in advance in the internal memory or the memory unit 60 of the microcomputer 50.
- the above-described tightening device is supposed to exhibit the functions as the torque calculation unit 51 and the slip determination unit 52 when the microcomputer 50 processes the slip determination program. However, the same function is exhibited by the electronic circuit without using the microcomputer. It is also possible to configure. Further, as described above, when the microcomputer 50 determines whether or not the amount of change in the tightening torque value at the predetermined time t is within the predetermined range, the same function is realized by the electronic circuit without using the microcomputer. It is also possible. Further, the tightening device can be configured to include the torque wrench and a torque calculation unit. The tightening device may be configured to include the torque wrench, the torque calculation unit 51, and a display device capable of displaying the tightening torque calculated by the torque calculation unit 51. That is, the slip determination unit 52 can be omitted.
- the torque calculation unit 51 described above reads torque reference values corresponding to individual patient information from the memory unit 60, and calculates a tightening torque based on the tightening torque reference value and an output signal of a load cell that is a torque detection unit.
- the torque calculation unit can be arbitrarily changed in design as long as it calculates the tightening torque of the tightening unit based on the output signal of the torque detection unit.
- the torque calculation unit can be configured by a microcomputer or an electronic circuit.
- the buzzer 93 is used as the notification unit, but the present invention is not limited to this.
- the doctor can change the design so that it is determined that the slip is detected by looking at the torque curve displayed on the liquid crystal display unit 91 (functioning as a display device). Further, when the microcomputer 50 determines that the latter change amount or change rate is smaller than the former change amount or change rate, or the change amount or change rate of the tightening torque value at a predetermined time t is within a predetermined range.
- an error is displayed on the liquid crystal display unit 91 (functioning as a display device), or an error is displayed by numerically displaying and blinking on the 7-segment display unit 93 (functioning as a display device). It is possible to change the design. Moreover, it is also possible to use a light emitting device such as an LED lamp as the notification unit. Further, the notification unit may be configured by selectively combining a buzzer, a light emitting device, a graph display device, and a numerical display device.
- the display device is not limited to the liquid crystal display unit 91 and the 7-segment display unit 93, and any display device may be used as long as it can display the tightening torque calculated by the torque calculation unit.
- the materials, shapes, dimensions, arrangement, etc. constituting each part of the fastening device described above are examples, and the design can be arbitrarily changed as long as the same function can be realized. Is possible.
- the torque wrench and the slip detection device are separated from each other.
- the torque wrench and the slip detection device can be configured integrally.
- the torque wrench and the torque calculation unit can be configured integrally.
- the fastening device can also be used for purposes other than dental implants.
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Abstract
Description
2・・・・フィクスチャー
W・・・・トルクレンチ
10・・・締め付け部
11・・係合部
12・・取付部
20・・・レンチ本体
21・・ヘッド部
22・・ハンドル部
23・・ロッド
24・・固定部
25・・コイルスプリング
30・・・ロードセル(トルク検出部)
31・・ロードボタン
32・・電源/出力ケーブル
D・・・・すべり検出装置
A・・・アンプ
C・・・A/D変換部
50・・マイコン
51・トルク演算部
52・すべり判定部
60・・メモリ部
70・・設定入力部(入力部)
80・・外部出力部
91・・液晶表示回部
92・・7セグ表示部
93・・ブザー(報知部)
10’・・締め付け部
11’・係合部
12’・取付部
20’・・レンチ本体
21’・ヘッド部
22’・ハンドル部
23’・トルク伝達部
23a’・第1端部
23a1’・爪部
23a11’・当て止め面
23a12’・傾斜面
23b’・第2端部
23b1’・ストッパ
23b2’・凹部
23c’・中間部(第2当て止め部)
24’・固定部(第3当て止め部)
25’・コイルスプリング(第2付勢部)
30’・・ロードセル(トルク検出部)
31’・ロードセル部
31a’・ロード部
32’・電源/出力ケーブル
33’・ボディ
41’・・スリーブ
42’・・コイルスプリング(第1付勢部)
Claims (18)
- アバットメントをフィクスチャーに螺着させる歯科インプラント用の締め付け装置において、
トルクレンチと、
すべり検出装置とを具備しており、
前記トルクレンチは、前記アバットメントに係合可能な締め付け部と、
前記締め付け部が設けられたヘッド部と、手動操作可能なハンドル部とを有するレンチボディと、
前記アバットメントを前記フィクスチャーに螺着させる際に発生する締め付けトルクを検出する締め付けトルク検出部とを備えており、
前記すべり検出装置は、前記トルク検出部により検出される締め付けトルクの変化量又は変化率を所定時間t毎にサンプリングし、先の所定期間tの締め付けトルクの変化量又は変化率と、当該先の所定期間tの直後の所定期間tの締め付けトルクの変化量又は変化率とを順次比較し、後者の変化量又は変化率が前者の変化量又は変化率よりも小さいか否かを判定するすべり判定部と、
前記すべり判定部により後者の変化量又は変化率が前者の変化量又は変化率よりも小さいと判定されたときに、アバットメントのフィクスチャーに対する締め付け状態がすべり現象発生の直前であることを報知する報知部とを備えている歯科インプラント用の締め付け装置。 - 請求項1記載の歯科インプラント用の締め付け装置において、
前記すべり検出装置は、患者の固有情報を入力可能な入力部と、
患者の固有情報に対応する複数の締め付けトルク基準値が記録されたメモリ部と、
前記入力部を通じて入力された患者の固有情報に対応する締め付けトルク基準値を前記メモリ部から読み出し、当該締め付けトルク基準値及び前記トルク検出部の出力信号に基づいて前記締め付けトルクを演算するトルク演算部とを更に備えている歯科インプラント用の締め付け装置。 - 請求項1又は2記載の歯科インプラント用の締め付け装置において、
前記報知部は、前記すべり判定部が後者の変化量又は変化率が前者の変化量又は変化率よりも小さいと所定回数判定したとき、前記締め付け状態がすべり現象発生の直前であることを報知する歯科インプラント用の締め付け装置。 - 請求項1~3の何れかに記載の歯科インプラント用の締め付け装置において、
前記トルク検出部は、前記アバットメントを前記フィクスチャーに螺着させる際に前記締め付け部にかかる荷重を電気信号に変換して出力するロードセルである歯科インプラント用の締め付け装置。 - 請求項1~4の何れかに記載の歯科インプラント用の締め付け装置において、
前記報知部はグラフ表示及び数値表示の少なくとも一方が可能な表示装置であり、
前記グラフ表示は、前記トルク検出部により検出された締め付けトルクの変化を示すトルク曲線を表示するようになっており、
前記数値表示は、前記トルク検出部により検出された締め付けトルクを数値表示するようになっている歯科インプラント用の締め付け装置。 - 請求項1~4の何れかに記載の歯科インプラント用の締め付け装置において、
前記報知部は、ブザー及び発光装置の少なくとも一方である歯科インプラント用の締め付け装置。 - 請求項1~6の何れかに記載の歯科インプラント用の締め付け装置において、
前記締め付け部が、前記レンチボディのヘッド部に対して着脱自在である歯科インプラント用の締め付け装置。 - アバットメントをフィクスチャーに螺着させる歯科インプラント用の締め付け装置において、
トルクレンチと、
すべり検出装置とを具備しており、
前記トルクレンチは、前記アバットメントに係合可能な締め付け部と、
前記締め付け部が設けられたヘッド部と、手動操作可能なハンドル部とを有するレンチボディと、
前記アバットメントを前記フィクスチャーに螺着させる際に発生する締め付けトルクを検出する締め付けトルク検出部とを備えており、
前記すべり検出装置は、前記トルク検出部により検出される締め付けトルクの変化量又は変化率を所定時間t毎にサンプリングし、所定時間tの締め付けトルク値の変化量又は変化率が所定範囲内であるか否かを判定するすべり判定部と、
前記すべり判定部により所定時間tの締め付けトルク値の変化量又は変化率が所定範囲内であると判定されたときに、アバットメントのフィクスチャーに対する締め付け状態がすべり現象発生の直前であることを報知する報知部とを備えている歯科インプラント用の締め付け装置。 - 請求項1又は8記載の歯科インプラント用の締め付け装置において、
前記トルクレンチは、前記レンチボディ内に設けられており且つ前記締め付け部に係合した第1端部と、前記第1端部の反対側の第2端部とを有するトルク伝達部を更に備えており、
前記トルク検出部は、前記トルク伝達部の第2端部に当接しており且つ当該トルク伝達部を介して前記締め付け部にかかる荷重を受け、電気信号に変換して出力可能なロードセルである歯科インプラント用の締め付け装置。 - 請求項9記載の歯科インプラント用の締め付け装置において、
前記ロードセルは、凸状のロード部を有しており、
前記トルク伝達部の第2端部には、前記ロードセルのロード部が挿入された凹部が設けられており、
前記ロード部の高さ寸法が前記凹部の深さ寸法よりも大きい歯科インプラント用の締め付け装置。 - 請求項9記載の歯科インプラント用の締め付け装置において、
前記ロードセルは、凹状のロード部を有しており、
前記トルク伝達部の第2端部には、前記ロードセルのロード部に挿入された凸部が設けられており、
前記凸部の高さ寸法が前記ロード部の深さ寸法よりも大きい歯科インプラント用の締め付け装置。 - 請求項9~11の何れかに記載の歯科インプラント用の締め付け装置において、
前記レンチボディは、前記ヘッド部が設けられた先端部と、後端部とを有しており、
前記トルク伝達部の第2端部は、前記レンチボディの後端部から突出しており、
前記ロードセルは、前記レンチボディの後方に配置され、前記第2端部に当接している歯科インプラント用の締め付け装置。 - 請求項9~12の何れかに記載の歯科インプラント用の締め付け装置において、
前記締め付け部の外周面にはラチェット溝が設けられており、
前記トルク伝達部は、前記第1端部に設けられ、前記ラチェット溝に係合可能な爪部を更に有している歯科インプラント用の締め付け装置。 - 請求項13記載の歯科インプラント用の締め付け装置において、
前記トルクレンチは、前記レンチボディに前記長さ方向に移動自在に外嵌しており且つ前記ロードセルに取り付けられたスリーブと、
前記レンチボディに設けられた第1当て止め部と前記スリーブの間に設けられた第1付勢部とを更に備えており、
前記締め付け部は前記ヘッド部に対して回転自在になっており、
前記トルク伝達部は、前記レンチボディ内に長さ方向に移動自在に収容されており、
前記ラチェット溝は、第1、第2壁を有しており、
前記爪部は、前記第1壁に当接し、前記締め付け部の第1方向の回転を規制する当て止め面と、
前記第2壁を押圧し、前記レンチボディを先端側に移動させる傾斜面とを有している歯科インプラント用の締め付け装置。 - 請求項13記載の歯科インプラント用の締め付け装置において、
前記レンチボディに設けられた第1当て止め部は、前記レンチボディに前記長さ方向に移動自在に外嵌しており且つ前記ロードセルに取り付けられたスリーブと、
前記レンチボディに設けられた第1当て止め部と前記スリーブの間に設けられた第1付勢部とを更に備えており、
前記締め付け部は前記ヘッド部に対して回転自在になっており、
前記トルク伝達部は、前記レンチボディ内に長さ方向に移動自在に収容されており、
前記ラチェット溝は、第1、第2壁を有しており、
前記第1壁は、前記爪部に当接し、前記締め付け部の第1方向の回転を規制する当て止め面を有し、
前記第2壁は、前記爪部に押圧され、前記レンチボディを先端側に移動させる傾斜面を有している歯科インプラント用の締め付け装置。 - 請求項14~15の何れかに記載の歯科インプラント用の締め付け装置において、
前記トルク伝達部は、第2当て止め部を更に有し、
前記トルクレンチは、第3当て止め部と、
前記第2、第3当て止め部間に設けられた第2付勢部とを更に備えている歯科インプラント用の締め付け装置。 - 請求項10記載の歯科インプラント用の締め付け装置において、
前記ロードセルは、前記ロード部の周りに立設されており且つ当該ロード部よりも高さ寸法が大きい保護壁を更に有している歯科インプラント用の締め付け装置。 - 請求項9~17の何れかに記載の歯科インプラント用の締め付け装置において、
前記すべり検出装置は、前記トルクレンチのロードセルの出力信号に基づいて前記締め付け部の締め付けトルクを演算するトルク演算部を更に備えている歯科インプラント用の締め付け装置。
Priority Applications (5)
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EP11838006.2A EP2636385A4 (en) | 2010-11-02 | 2011-11-01 | CLAMPING DEVICE FOR DENTAL IMPLANTS |
US13/879,994 US20130203016A1 (en) | 2010-11-02 | 2011-11-01 | Tightening apparatus for dental implant |
KR1020137010478A KR101719658B1 (ko) | 2010-11-02 | 2011-11-01 | 치과 임플란트용 체결 장치 |
CN201180052567.8A CN103189014B (zh) | 2010-11-02 | 2011-11-01 | 用于牙科种植体的拧紧装置 |
TW100139984A TWI558382B (zh) | 2010-11-02 | 2011-11-02 | Locking device for dental implantation |
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JP2010246541A JP5570947B2 (ja) | 2010-11-02 | 2010-11-02 | 歯科インプラント用の締め付け装置 |
JP2010-246541 | 2010-11-02 |
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JP (1) | JP5570947B2 (ja) |
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KR101483437B1 (ko) * | 2013-08-19 | 2015-01-16 | 주식회사 네오바이오텍 | 치과용 토크드라이버 홀더 |
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US11453105B2 (en) | 2016-09-13 | 2022-09-27 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
KR101894184B1 (ko) | 2017-03-17 | 2018-08-31 | 서울과학기술대학교 산학협력단 | 검전 기능이 내장된 래칫 렌치 |
BR102018015234B1 (pt) * | 2018-07-25 | 2019-11-19 | Stratexia Inovacao Ind E Servicos Importacao E Exportacao Eireli Me | dispositivo odontológico eletrônico e sistema embarcado em dispositivo odontológico eletrônico |
USD964128S1 (en) * | 2019-06-13 | 2022-09-20 | M3 Health Indústria E Comércio De Produtos Médicos, Odontológicos E Correlatos S.A. | Prosthetic torque wrench |
JP1666452S (ja) * | 2019-08-03 | 2020-08-24 | ||
CN112545688B (zh) * | 2020-12-23 | 2022-01-21 | 开封市中心医院 | 一种牙齿矫正骨钉拧紧装置 |
CN115106969B (zh) * | 2021-03-18 | 2024-01-19 | 赖士豪 | 扭力扳手 |
US11992919B2 (en) | 2021-03-18 | 2024-05-28 | Shih-Hao Lai | Torque wrench |
CN114353724B (zh) * | 2022-01-17 | 2024-04-26 | 武汉锐科光纤激光技术股份有限公司 | 打螺检测方法及打螺装置 |
CN116098719B (zh) * | 2023-02-03 | 2023-11-17 | 极限人工智能有限公司 | 带自动检测的专用棘轮快换固定装置及种植牙系统 |
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TWI558382B (zh) | 2016-11-21 |
TW201223509A (en) | 2012-06-16 |
EP2636385A1 (en) | 2013-09-11 |
KR20140001878A (ko) | 2014-01-07 |
CN103189014A (zh) | 2013-07-03 |
JP2012095854A (ja) | 2012-05-24 |
CN103189014B (zh) | 2016-01-20 |
JP5570947B2 (ja) | 2014-08-13 |
US20130203016A1 (en) | 2013-08-08 |
EP2636385A4 (en) | 2015-07-22 |
KR101719658B1 (ko) | 2017-03-24 |
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