CN107212935B - Dental full-crown tooth body pre-standby device - Google Patents
Dental full-crown tooth body pre-standby device Download PDFInfo
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- CN107212935B CN107212935B CN201710391981.0A CN201710391981A CN107212935B CN 107212935 B CN107212935 B CN 107212935B CN 201710391981 A CN201710391981 A CN 201710391981A CN 107212935 B CN107212935 B CN 107212935B
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- 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
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
- A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
-
- 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
- A61C3/06—Tooth grinding or polishing discs; Holders therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C2204/00—Features not otherwise provided for
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention discloses a dental full-crown tooth body pre-standby device which comprises a rack, wherein a motor, a control mechanism for controlling the motor to operate and an annular grinding and cutting belt driven by the motor are arranged on the rack, and the grinding and cutting belt comprises a smooth surface and a grinding surface provided with carborundum. The invention has simple structure, convenience and practicability.
Description
Technical Field
The invention relates to a dental full-crown tooth body preparation device.
Background
The full crown is the most common prosthesis in the department of dental restoration, covers the whole crown surface, can be used for restoring the shape, the function and the beauty of a defective tooth, and can also be used as a retainer for fixing a false tooth; the causes of tooth defect include caries, trauma, abrasion, acid erosion, developmental deformity and the like, and are common diseases and frequently encountered diseases in stomatology; if the defect is too large, a full crown prosthesis is needed.
The whole crown process is described below by taking a porcelain whole crown as an example:
1. oral preparation
Trimming of adjacent teeth and cusps and marginal ridges that are too sharp, too long or morphologically abnormal for the jaw and that prevent repair.
2. Dental preparation
Preparing a tongue surface: an inverted cone needle was first used to grind a groove about 1.0mm deep along the gingival margin as a reference. And then, using a proper lathe needle to eliminate the inverted concave part of the tongue bulge to the gingival margin, and uniformly grinding a gap of 1.2-1.5 mm according to the anatomical shape of the tongue surface.
Preparing labial and facial surfaces: a groove with the depth of 1.0mm is ground along the lip gingival margin by an inverted cone lathe needle to be used as a reference. And then selecting a proper machine needle to uniformly grind and remove 1.2-1.5 mm of teeth as tissues according to the shape of the labial surface.
Preparing adjacent surfaces: cutting along the direction of cutting gum by using a fine carborundum needle which is close to the adjacent surface of the affected tooth, so that the affected tooth is completely separated from the adjacent tooth in contact, and the undercut of the adjacent surface is eliminated, and the contact point of cutting the adjacent tooth is avoided. The axial wall of two adjacent surfaces of the preparation body converges 2-5 degrees towards the tangential end. The adjacent surface of the upper anterior teeth is removed of undercut and is added with the width of the shoulder of about 1.0mm, and is ground for 1.9-2.3 mm, and the adjacent surface of the lower anterior teeth is ground for 1.7-1.9 mm.
Cutting ends and preparing maxillofacial surfaces: the incisal ends of the anterior teeth should be ground by 1.5mm and formed as a smooth inclined plane inclined by 45 ° to the lingual side, while the mandibular teeth should be prepared as an inclined plane inclined to the labial side. The functional tip of the molar maxillofacial region is ground by 1.5-2.0 mm, and the non-functional tip is 1.2-1.5 mm.
Preparing a shoulder: the labial, adjacent and lingual surfaces of the neck of the tooth are ground into 90' shoulder with a columnar needle, the shoulder width is 1.0mm, each part is continuous and consistent, and the height is generally level with the gingival margin or slightly below the gingival margin (<2 mm).
Sixthly, the completion: each prepared surface should be continuous, free of undercuts, and free of sharp corners. Otherwise, it should be modified. Finally, the surfaces are formed into round and smooth surfaces by using a proper tool.
3. Impression taking and model making
Firstly, selecting a proper partial denture tray.
② expelling the gum, stopping bleeding and cleaning the prepared body, especially the shoulder surface.
And thirdly, selecting special and fine impression materials such as silicon rubber and the like to prepare the impression of the jaw. The impression should be clear and complete.
Fourthly, the model is timely filled with the hard gypsum. The model should be complete, with clear gingival margin and no air bubbles and nodules. Besides the affected teeth, at least one complete adjacent tooth in the near and far sides of the affected teeth can be made in the technical room.
4. Temporary crown repair
After the preparation of the tooth and the preparation of the impression are finished, a preformed temporary crown or self-setting resin is used as a temporary crown protection preparation and is bonded by a temporary bonding agent. Care should be taken to clean and sterilize the preparation and temporary crown prior to bonding. Trauma to the gums or bite from the temporary crown should be avoided. The temporary crown should also have a normal anatomical shape and be highly polished.
5. Trial wearing, cementation and completion of porcelain whole crown
(1) Try-on
Checking whether the appearance and the inner surface of the manufactured all-ceramic crown have defects or nodules. Whether the color of the porcelain crown is consistent with the original color. If any problem exists, the corresponding treatment should be carried out.
Secondly, checking the situations of positioning, stability, sealing, adjacency, occlusion and the like of the porcelain crown on the working model.
Taking down the temporary crown and cleaning the preparation body.
And fourthly, after the porcelain crown is cleaned, trying on the porcelain crown in the mouth. The porcelain crown is smoothly in place and has no obvious looseness or tilting feeling. The porcelain crown has good sealing fit with the neck edge of the tooth body and has no obvious gap. The crown is in proper contact with the adjacent teeth. If the problem occurs, corresponding adjustment and modification are needed, and rework is needed if necessary.
Fifthly, in the process of trying on and modifying in the mouth, if the surface smoothness and color damage of the porcelain crown are large, glazing and coloring should be carried out again.
Sixthly, grinding, polishing, disinfecting and drying for later use (if the steps of sand blasting, ultrasonic cleaning, hydrofluoric acid preparation acid etching preparation, surface adhering and the like are needed, the specific method is according to the requirements of manufacturers).
(2) Cementation of cement
Firstly, the mouth is kept moist, the crown and the prepared body are cleaned, and 75% ethanol is used for disinfection. And drying if necessary.
Secondly, selecting a proper adhesive (the specific use method is according to the requirements of manufacturers), uniformly coating the adhesive on the preparation body and the inner surface of the crown after mixing, correctly positioning the crown on the preparation body, pressing the mixture tightly by using fingers, preliminarily removing excessive adhesive, putting a yarn ball on the occlusal surface of the crown, and ordering the patient to bite tightly.
Thirdly, after the cement is solidified, the redundant adhesives on the tooth surface, the gingival sulcus, the adjacent gap and the like are carefully removed.
Fourthly, the occlusion and the contact point of the adjacent tooth are checked again.
If the temporary fixation is adopted, the date of the return visit should be specified.
(3) Complete the process
Firstly, if gum tissues are stimulated in the processes of trying on, cementation and removal, the iodine glycerol preparation can be locally used for preventing the gingivitis.
Writing medical records and advice (including the use and sanitation guidance of the all-ceramic crown).
[ notes ] to provide a novel therapeutic agent
1. The preparation of the whole ceramic crown has more tooth tissues and the depth can reach the dentin layer, so the preparation of the living marrow tooth should be firstly performed with local infiltration anesthesia to reduce the pain of a patient.
2. The intermittent grinding and cutting method is adopted, cold water is used for spraying and cooling at any time to protect dental pulp, and the high-speed and continuous grinding and cutting of tooth body tissues under the condition of no water cooling are forbidden, and the operation is careful particularly in the preparation of a tooth neck.
3. The shoulder cannot be made into a blade shape, a feather shape, a shallow concave shape or a slope surface to prevent the crown edge from being resistant to force reduction.
4. The surface of the tooth body after finishing is smooth and round, and any sharp corner angle on the shaft wall is not allowed, so that the porcelain crown is prevented from being broken due to stress. Immature marrow teeth of teenagers are not suitable for making porcelain whole crowns.
It can be seen that the preparation of the tooth body is needed before the removal of the mold, i.e. the grinding and cutting are performed on the affected tooth, so as to leave a space for the full crown restoration, and the preparation of the full crown tooth body is one of the most common operations in dentistry.
Examples of the preparation requirements of the full-porcelain crown of the posterior teeth are: the requirement is that the taper is appropriate, the inner angle is round and blunt, the shoulder is clear, the shoulder width is about 0.8-1.0mm, and the shoulder width is uniform and smooth.
It can be seen that the preparation of the full crown tooth is a key in the whole full crown restoration and is quite difficult. Only when the tooth preparation is well done, the subsequent impression taking, crown processing and making and the subsequent crown adhering repair can be successfully completed.
The preparation of the full crown teeth at present is mainly finished by instruments such as a carborundum machine needle, a tungsten steel drill and the like, but the method has high technical requirements, and only doctors with skilled technology and rich clinical experience can prepare the full crown teeth with high quality. For example, a diamond grinding needle is used, fine diamond grains are attached to the periphery of a drill bit at the head of the diamond grinding needle, and the diamond grains are subjected to impurity removal, demagnetization, rounding and purification treatment, so that the diamond grinding needle has excellent sharpness and wear resistance.
In the prior art, a dental high-speed turbine is mainly used for driving a carborundum needle to directly grind and cut teeth to be treated, and an operator is required to be skilled in the process of controlling the angle, force and direction of the needle running during preparation, so that the dental tissue is uniformly ground, and relatively uniform gaps and spaces are obtained for full-crown restoration.
The above manner brings about the following problems:
1. very high experience requirements are provided for operators, doctors with rich experience have higher error rate, and doctors with little experience are difficult to control;
2. in the process of tooth preparation, the carborundum needle can grind and cut the teeth to be treated and can damage the nearby teeth which do not need to be treated.
Disclosure of Invention
The invention aims to provide a dental full-crown tooth body preparation device, so as to reduce the experience requirement on an operator.
The patent scheme is as follows: a dental full-crown tooth body pre-standby device comprises a rack, wherein a motor, a control mechanism for controlling the motor to operate, a cooling system and an annular grinding and cutting belt driven by the motor are arranged on the rack, and the grinding and cutting belt comprises a smooth surface and a grinding surface provided with carborundum.
When the grinding and cutting belt is used, the grinding and cutting belt is sleeved on a tooth to be treated, a grinding surface is in contact with the tooth to be treated, the grinding and cutting belt, a motor and the tooth to be treated form a structure similar to a conveying belt, a main shaft of the motor is a driving roller, the grinding and cutting belt is a belt body, the tooth to be treated is a tensioning roller, then a control mechanism is operated, the motor is started to drive the grinding and cutting belt to rotate, the grinding surface quickly grinds the tooth, and a cooling system cools the grinding surface, grinding chips and the like in time during grinding.
Compared with the prior art, the invention has the beneficial effects that:
1. in the processing process, the grinding surface is in contact grinding with at least three axial surfaces of the tooth to be treated, compared with the method of grinding the circumferential contour of the tooth to be treated by adopting a carborundum lathe needle, the grinding machine can be used for grinding a plurality of axial surfaces simultaneously, the efficiency is improved, the grinding quality is ensured, the grinding machine can be automatically attached to the tooth for grinding, and the grinding machine does not need to manually operate to rotate around the tooth in the circumferential direction in the process; in addition, the smooth surface of the invention is contacted with adjacent teeth or shaft surfaces which do not need to be polished, thereby avoiding the damage to the adjacent teeth caused by the use of carborundum needles.
2. In the processing process, the grinding and cutting belt can form a relatively closed space with the teeth to be processed, the grinding and cutting belt can serve as a speed reducing belt and a barrier belt, fragments and the like generated by grinding are not easy to splash to hurt the oral cavity of a patient, meanwhile, the grinding and cutting belt can bring the fragments to one position, so that the fragments are convenient to process uniformly, and the fragments are prevented from being clamped between the teeth and being difficult to clean.
3. The grinding and cutting belt grinding equipment is simple, and compared with a carborundum needle turning grinding machine, the grinding and cutting belt grinding machine is much simpler, mainly because the grinding and cutting belt is light in weight, small in grinding force and vibration in the grinding process, and vibration and damage to teeth are far lower than those of the carborundum needle turning grinding machine.
4. The grinding and cutting belt is simple and convenient to operate, the auxiliary time is short, and the operation is very simple and convenient no matter the grinding of the grinding and cutting belt is carried out manually or mechanically. The clamping from the replacement of the grinding and cutting belt to the workpiece to be processed can be completed in a short time.
5. The grinding ratio of the grinding and cutting belt is large, the utilization rate of the device is high, the cutting efficiency is high, the cost of tools and energy consumed for cutting materials with the same weight or volume is reduced, and the occupied time is short.
6. The grinding of the grinding and cutting belt is very safe, the noise is low, the powder is less, the control is easy, and the environmental benefit is good.
7. Because the abrasive cutting belt has light weight, the abrasive cutting belt has no danger of hurting people even if the abrasive cutting belt is broken. The grinding and cutting belt is not seriously desanded like a carborundum needle, particularly, when the belt is subjected to dry grinding, grinding dust mainly forms the material of a workpiece to be processed, and the dust is easy to recover and control. Because the rubber contact wheel is adopted, the grinding and cutting belt cannot generate rigid impact on a workpiece like a carborundum needle turning, so that the processing noise is low and is generally less than 70 dB.
8. The grinding and cutting belt runs between the gaps between teeth, the grinding and cutting belt is in surface contact with the teeth, the whole grinding and cutting belt can be well supported by adjacent teeth, and the carborundum lathe needle is of a cantilever structure, is in line contact with the teeth in the running process, is not easy to control and easily causes fatigue of an operator.
The invention provides a new technical method which comprises the following steps: the existing preparation concept is completely changed, and four axial surfaces and a formed shoulder of the tooth are prepared by a brand new method. Compared with the prior preparation method, the technical requirements on operators are relatively lower, and the oral cavity preparation method is easier for oral cavity doctors to master. The existing method for preparing the axial surface of the tooth body by using the traditional carborundum machine needle requires higher technique of an operator, the axial surface part of the full-crown tooth body preparation can be prepared only through a plurality of exercises and continuously accumulated experiences, not only is the tooth body tissue with proper thickness required to be uniformly prepared (ground and cut) on the axial surface, but also a shoulder with proper width is required to be formed, and the prepared surface is smooth, has no obvious convex-concave points and has smooth surface.
The technical method adopted by the patent can reduce the difficulty of tooth preparation, and according to the operation process, even doctors with relatively less experience can grasp the method quickly, so that the tooth preparation effect required by clinical treatment is prepared, and a solid foundation is laid for subsequent full-crown restoration.
In the first preferred scheme, as further optimization of the basic scheme, the inner wall of the grinding and cutting belt is a grinding surface, and the outer wall of the grinding and cutting belt is a smooth surface.
The effect of this scheme is: can form tooth tissue with proper thickness for uniform preparation (grinding and cutting) of axial surface.
Preferably, in the second scheme, as a further optimization of the basic scheme, the cross section of the grinding and cutting belt is L-shaped, and only the bottom surface of the grinding and cutting belt is a grinding surface.
The effect of this scheme is: can be used for forming shoulders with proper width, and the prepared surface is smooth, has no obvious convex-concave points and has smooth surface.
In a third preferred embodiment, as a further optimization of the basic embodiment, the first preferred embodiment or the second preferred embodiment, the cooling system is a water cooling system, and the water cooling system comprises a container for containing water and a water conveying pipeline for guiding the water from the opening of the container to the surface of the abrasive cutting belt.
The effect of this scheme is: the device can be cooled by a water cooling mode, and meanwhile, the oral cavity of a patient can be cleaned in time, the technology is mature, and the cost is low.
Preferably, as a further optimization of the basic scheme, the first preferred scheme or the second preferred scheme, the control mechanism is of a knob type or a pedal type.
The effect of this scheme is: the user can conveniently control the control mechanism to control the stable operation of the device.
Preferably, the granularity of the carborundum is 20-30 μm or 53-63 μm or 100-120 μm or 121-140 μm as further optimization of the basic scheme, the first preferable scheme or the second preferable scheme.
And the sixth preferred scheme is that the thickness of the abrasive cutting belt is 0.2mm as a further optimization of the basic scheme, the first preferred scheme or the second preferred scheme.
Preferably, the width of the abrasive cutting belt is 4mm, 7mm or 10mm as a further optimization of the first preferred embodiment.
Preferably, the width of the bottom surface is 0.5mm, 0.8mm or 1.0mm as a further optimization of the second preferred embodiment.
Preferably, the cross section of the grinding and cutting belt is tapered, and the taper is 6 °.
The effect of this scheme does: the cone-shaped design can be more suitable for the structure of human teeth, and can be more easily inserted into the tooth root part from the tooth crown part, and simultaneously, the grinding and cutting belt is beneficial to uniformly grinding the teeth.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic representation of a tooth before and after preparation;
FIG. 3 is a schematic view of a shoulder milling strip in accordance with an embodiment of the present invention;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic view of a shaft face ground strip of FIG. 1;
FIG. 6 is a diagram illustrating a state of use of a shoulder grinding strip in accordance with an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a shoulder grinding and cutting strip 1, a shoulder grinding and cutting strip bottom 2, a shoulder 3, a tooth to be treated 4, a shaft surface grinding and cutting strip 5, a grinding surface 6 and a control mechanism 7.
The first embodiment is as follows:
as shown in figure 1, the dental full-crown tooth body preparation device comprises a rack, wherein a motor, a control mechanism for controlling the operation of the motor, a cooling system and an annular grinding and cutting belt driven by the motor are arranged on the rack, and the grinding and cutting belt comprises a smooth surface and a grinding surface provided with carborundum.
When the grinding and cutting belt is used, the grinding and cutting belt is sleeved on a tooth to be treated, a grinding surface is contacted with the tooth to be treated, then the control mechanism is operated, the motor is started to drive the grinding and cutting belt to rotate, the grinding surface quickly grinds the tooth, and a cooling system cools the grinding surface and grinding scraps in time in the grinding process; in addition, the smooth surface of the invention is contacted with adjacent teeth or shaft surfaces which do not need to be polished, thereby avoiding the damage to the adjacent teeth caused by the use of carborundum needles. In the whole processing process, the grinding and cutting belt can form a relatively closed space with the teeth to be processed, the grinding and cutting belt can serve as a speed reducing belt and a barrier belt, fragments and the like generated by grinding are not easy to splash and injure the oral cavity of a patient, meanwhile, the grinding and cutting belt can bring the fragments to one position, so that the fragments are convenient to process uniformly, and the fragments are prevented from being clamped between the teeth and being difficult to clean.
The invention provides a new technical method which comprises the following steps: the existing preparation concept is completely changed, and four axial surfaces and a formed shoulder of the tooth are prepared by a brand new method. Compared with the prior preparation method, the technical requirements on operators are relatively lower, and the oral cavity preparation method is easier for oral cavity doctors to master. The existing method for preparing the axial surface of the tooth body by using the traditional carborundum machine needle requires higher technique of an operator, the axial surface part of the full-crown tooth body preparation can be prepared only through a plurality of exercises and continuously accumulated experiences, not only is the tooth body tissue with proper thickness required to be uniformly prepared (ground and cut) on the axial surface, but also a shoulder with proper width is required to be formed, and the prepared surface is smooth, has no obvious convex-concave points and has smooth surface.
The technical method adopted by the patent can reduce the difficulty of tooth preparation, and according to the operation process, even doctors with relatively less experience can grasp the method quickly, so that the tooth preparation effect required by clinical treatment is prepared, and a solid foundation is laid for subsequent full-crown restoration.
As shown in figures 2, 4 and 5, the invention comprises a shaft surface grinding and cutting strip, wherein the inner wall of the shaft surface grinding and cutting strip is a grinding surface, and the outer wall of the shaft surface grinding and cutting strip is a smooth surface, so that tooth body tissues with proper thickness can be uniformly prepared (ground and cut) on the shaft surface.
The grinding and cutting belt grinding equipment is simple, and compared with a carborundum needle turning grinding machine, the grinding and cutting belt grinding machine is much simpler, mainly because the grinding and cutting belt is light in weight, small in grinding force and vibration in the grinding process, and vibration and damage to teeth are far lower than those of the carborundum needle turning grinding machine. The grinding and cutting belt is simple and convenient to operate, the auxiliary time is short, and the operation is very simple and convenient no matter the grinding of the grinding and cutting belt is carried out manually or mechanically. The clamping from the replacement of the grinding and cutting belt to the workpiece to be processed can be completed in a short time. The grinding ratio of the grinding and cutting belt is large, the utilization rate of the device is high, the cutting efficiency is high, the cost of tools and energy consumed for cutting materials with the same weight or volume is reduced, and the occupied time is short. The grinding of the grinding and cutting belt is very safe, the noise is low, the powder is less, the control is easy, and the environmental benefit is good. Because the abrasive cutting belt has light weight, the abrasive cutting belt has no danger of hurting people even if the abrasive cutting belt is broken. The grinding and cutting belt is not seriously desanded like a carborundum needle, particularly, when the belt is subjected to dry grinding, grinding dust mainly forms the material of a workpiece to be processed, and the dust is easy to recover and control. Because the rubber contact wheel is adopted, the grinding and cutting belt cannot generate rigid impact on a workpiece like a carborundum needle turning, so that the processing noise is low and is generally less than 70 dB.
As shown in fig. 3 and 6, the shoulder grinding and cutting strip of the present invention has an L-shaped cross section, only the bottom surface of the grinding and cutting strip is a grinding surface, which can be used to form a shoulder with a proper width, and the prepared surface is smooth, has no obvious convex and concave points, and has a smooth surface.
The cooling system is a water cooling system which comprises a container for containing water and a water conveying pipeline for leading the water to the surface of the grinding and cutting belt from the opening of the container. The water cooling system is a water mist cooling mode which is conventionally used in the prior art.
The device can be cooled by a water cooling mode, and meanwhile, the oral cavity of a patient can be cleaned in time, the technology is mature, and the cost is low.
The control mechanism is knob type or pedal type. The user can conveniently control the control mechanism to control the stable operation of the device.
The rack is provided with a fixing part for fixing on the ground. The device is convenient to suspend and fix, an operator is prevented from holding the whole device all the time, the use difficulty of the operator is greatly reduced, and the fatigue of an oral doctor in the tooth preparation process is relieved.
Axial grinding strip, grinding strip with carborundum on one side, 4mm/7mm/10mm width, 0.2mm thickness (granularity of grinding surface, determining cutting ability of grinding strip, coarse grinding strip for grinding and cutting, and fine and ultra-fine grinding strip for polishing)
The granularity of emery:
| classification | Size of | Use of |
| Coarse | 121-140μm | For milling and cutting |
| Standard of merit | 100-120μm | For milling and cutting |
| Thin and thin | 53-63μm | For polishing |
| Ultra-fine | 20-30μm | For polishing |
Shoulder milling and cutting strips: shoulder mill cut strips with diamond grains on the lower edge (for shaping and polishing of the preparation shoulder). The crown of the shoulder grinding strip section is similar to an L shape, the width of the lower end is designed to be 0.5mm, 0.8mm and 1.0mm according to the material of the prepared all-ceramic restoration body, only the lower surface of the lower end is provided with carborundum, the cutting function is realized, and the thickness is 0.2 mm.
A high speed motor driving the movement of the abrasive cut strip. (can be designed as a contact type hand press or foot switch)
A water cooling system: is positioned in a water conveying pipeline which comprises a container for containing water and guides the water from the opening of the container to the surface of the grinding and cutting strip.
Because of the different materials of the full crown prosthesis, the required gaps are different, and the tooth volume prepared (ground) is different. The steps of the method are described herein with reference to the preparation of a full ceramic crown of zirconium dioxide.
A deep groove parallel to the gingival margin is respectively formed on the buccal surface and the lingual (palatal) surface of a tooth needing full crown restoration by using a carborundum needle, the deep groove is arranged at the shoulder position of a tooth preparation design, and the groove for positioning can effectively prevent an operating grinding strip from moving towards the gingival so as to enable the grinding strip to repeatedly move in a fixed area of the tooth.
Using a conventional strip (i.e., a strip for axial grinding), the grinding strip is first placed around the tooth with the carborundum-bearing side facing the tooth surface.
The motor switch is switched on, the grinding and cutting belt is driven to repeatedly grind and cut on the tooth surface, and water in the container flows out of the grinding and cutting belt for cooling. Grinding four axial surfaces of teeth uniformly by using coarse-grained strips, and adjusting the rotating speed of a motor to a lower speed and a longer grinding time when the cutting amount of the axial surfaces of the teeth is close to 1mm (about 2-3min) (the rotating speed of the motor can be adjusted, a beginner recommends to set the rotating speed to be lower, and a skiller can adjust the rotating speed to be higher and shorten the required cutting time)
And (4) continuously grinding and cutting by using the cutting strip with fine granularity, and performing shape-modifying polishing, wherein the thickness to be cut is stopped when reaching 1mm in about 1 min. The prepared tooth is checked for proper volume with a dental-specific, fixed-depth probe.
The preparation is carried out by grinding and cutting the belt with the shoulder, and the shoulder is molded and polished for about 1 min.
Then, the occlusal surface of the tooth is prepared by a conventional carborundum needle (such as a flame-shaped drill bit and a water drop type drill bit) and is ground by about 1.5-2 mm.
The comparative experiment results are as follows:
compared with the conventional technical means and the technical scheme, the design contrast experiment respectively arranges doctors (15 persons) with more than five years of clinical experience and interns (15 persons) to participate, and respectively adopts the conventional means of carborundum needles and the full crown tooth preparation of the invention. Full crown tooth preparation is performed on the plaster-infused isolated teeth.
The practice doctor group: the time required for preparing the full crown tooth body of a single tooth is obviously shortened by adopting the technical method (the technology is averagely 19 minutes, and the traditional technology is 38 minutes). The grading is carried out according to the full-crown tooth-preparing standard of full-porcelain teeth, and the prepared tooth quality score (average score) is obviously higher than the score of the conventional method.
Doctor groups with more than five years of clinical experience: the time required by the preparation of the full crown tooth body by adopting the technical method and the conventional method is not obviously different. There was no significant difference in the quality scores of the prepared teeth.
The conventional technology comprises the following steps: the preparation time of a single tooth completed by a intern is far longer than that of an experienced doctor, and the preparation quality score (5.8 points on average) is far lower than that of the experienced doctor.
The technical method comprises the following steps: the interns were not clearly distinguishable from the experienced physicians in terms of preparation time and were slightly inferior in quality to the experienced physicians, but were able to achieve an acceptable range overall (on average 7.1 points on a 10 point full scale).
Example two:
the only difference from the first embodiment is that: the cross section of the axial surface grinding strip is in a conical shape with a wide upper part and a narrow lower part, and the taper is 6 degrees.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. A dental full-crown tooth body pre-standby device comprises a rack and is characterized in that a motor, a control mechanism for controlling the motor to operate, a cooling system and a grinding and cutting belt driven by the motor are arranged on the rack, and the grinding and cutting belt comprises a smooth surface and a grinding surface provided with carborundum; the inner wall of the grinding and cutting belt is a grinding surface, and the outer wall of the grinding and cutting belt is a smooth surface; the cross section of the grinding and cutting belt is L-shaped, and the bottom surface of the grinding and cutting belt is a grinding surface; the cross section of the grinding and cutting belt is conical, and the conicity is 6 degrees.
2. The dental full crown tooth body preparation device according to claim 1, wherein the cooling system is a water cooling system comprising a container for holding water and a water delivery pipeline for introducing water from the container mouth to the surface of the abrasive cutting belt.
3. The dental full crown tooth preparation device according to claim 1, wherein said control mechanism is knob type or pedal type.
4. The device as claimed in claim 1, wherein the carborundum particle size is 20-30 μm or 53-63 μm or 100-120 μm or 121-140 μm.
5. A dental full crown tooth preparation device according to claim 1, wherein the abrasive cutting band has a thickness of 0.2 mm.
6. The dental full crown tooth preparation device according to claim 1, wherein the abrasive cutting band has a width of 4mm or 7mm or 10 mm.
7. The dental full crown tooth preparation device according to claim 1, wherein the width of the bottom surface is 0.5mm or 0.8mm or 1.0 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110403717A (en) * | 2018-04-26 | 2019-11-05 | 盘锦国瑞升科技有限公司 | A kind of burnishing stick of grinding and polishing teeth space |
| CN108635067A (en) * | 2018-08-07 | 2018-10-12 | 广东工业大学 | A kind of miniature grinding and polishing tool of dentistry |
| CN109820610A (en) * | 2019-01-31 | 2019-05-31 | 上海慧丰牙科技术有限公司 | A kind of fixed denture and processing technology |
| CN113520629A (en) * | 2021-08-31 | 2021-10-22 | 青岛市口腔医院 | Preparation method of neck and shoulder of tooth in full crown restoration process of tooth and special machine needle thereof |
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| CN101011294A (en) * | 2006-02-01 | 2007-08-08 | 马尼株式会社 | Dental grinding stone with axis and its production method |
| WO2007142630A1 (en) * | 2006-06-05 | 2007-12-13 | Daniel Sung-Yul Kim | Dental filing tool |
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