CN114563264A - Improved dental implant fatigue test fixture - Google Patents
Improved dental implant fatigue test fixture Download PDFInfo
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- CN114563264A CN114563264A CN202210175880.0A CN202210175880A CN114563264A CN 114563264 A CN114563264 A CN 114563264A CN 202210175880 A CN202210175880 A CN 202210175880A CN 114563264 A CN114563264 A CN 114563264A
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- 239000004053 dental implant Substances 0.000 title claims abstract description 56
- 238000009661 fatigue test Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 230000006835 compression Effects 0.000 claims abstract description 59
- 238000007906 compression Methods 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000011664 nicotinic acid Substances 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 239000010935 stainless steel Substances 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 230000002572 peristaltic effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000007943 implant Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000008312 Tooth Loss Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001055 chewing effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention belongs to the technical field of dental implant mechanical testing, and discloses an improved dental implant fatigue testing clamp which comprises a compression system, a fixing system and a water bath system; the compression system comprises an upper pressure head, a connecting rod, a sliding pressure plate, a compression plate, a thrust ball bearing core and a replaceable pressure plate; the fixing system comprises an embedding cylinder, an arc-shaped fixing platform upper component, a fixing baffle, an arc-shaped fixing platform lower component, a platform positioning plate and a T-shaped groove positioning plate; the water bath system comprises an extension shaft, a connecting bottom plate, a dry-burning heating rod, a waterproof gasket, a water inlet connector, a water outlet connector, a waterproof thermocouple, a water bath cover, a positioning ring and a connecting cover. The invention can better fix the dental implant sample, prevent the dental implant sample from being interfered by the extrusion external force during fixing and the horizontal external force during loading, and simultaneously can control the environmental temperature of the external bionic liquid and the total amount of the liquid to keep stable.
Description
Technical Field
The invention belongs to the technical field of material mechanics tests, and particularly relates to a fixture for performing a fatigue test on an intraosseous dental implant sample.
Background
The dental implant technology is gradually accepted by more patients in recent years as one of the restoration methods of people after the tooth loss. The endosseous dental implant is divided into a spiral implant, a columnar implant, a leaf-shaped implant, an anchor-shaped implant and the like, and the main structure of the endosseous dental implant comprises an implant base column, a neck and a body part. The dental implant material mainly comprises a high polymer material, porcelain, metal and alloy thereof, wherein titanium and titanium alloy are the most widely applied materials at present. In the use process of replacing natural teeth, the dental implant is subjected to fatigue cracks and even breakage due to the cyclic load effect of long-time chewing under the oral environment. The fatigue test can determine the fatigue performance of the material under the action of cyclic loading, and is one of basic test methods for mechanical performance tests of the material.
According to the requirements of the dynamic fatigue test of the intraosseous dental implant in the current national pharmaceutical industry standard YY/T0521-2018, the dental implant sample needs to be fixed according to a certain angle and distance, but no definite requirements are made on the fixing mode. The current clamp mainly adopts two modes of screw clamping and threaded connection, but in the actual use process, redundant external force is generated on the dental implant sample, and the test result is influenced. In addition, the existing device can also influence the stress condition of the dental implant when a larger horizontal external force occurs, so that the test result is inaccurate.
Disclosure of Invention
The invention provides an improved dental implant fatigue test fixture aiming at the fatigue test requirements of a dental implant sample, which can better fix the dental implant sample, prevent the dental implant sample from being interfered by an extrusion external force during fixing and a horizontal external force during loading, and simultaneously can control the environmental temperature of external bionic liquid and the total amount of the liquid to keep stable.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides an improved dental implant fatigue test fixture, which comprises a compression system, a fixing system and a water bath system, wherein the compression system is connected with the fixing system through a water bath system;
the compression system comprises an upper pressure head, a connecting rod, a sliding pressure plate, a compression plate, a thrust ball bearing core and a replaceable pressure plate which are coaxially arranged; the upper pressure head is connected to the center of the bottom of the sliding pressure plate through the connecting rod, and the bottom of the upper pressure head is used for applying force to the dental implant sample; the replaceable pressure plate is arranged on the sliding pressure plate through an upper groove and is fixedly connected with the sliding pressure plate through a center through screw; the thrust ball bearing core is arranged between the replaceable pressure plate and the compression plate and is respectively contacted with the upper surface of the replaceable pressure plate and the lower convex surface of the compression plate; the center of the top of the compression disc is used for being connected with a force application pressure head of the testing machine; the compression disc and the sliding pressure disc are connected through a plurality of double-ring stainless steel tension springs which are circumferentially and uniformly distributed, and each double-ring stainless steel tension spring is arranged along the axial direction of the compression disc and the sliding pressure disc;
the fixing system comprises an embedding cylinder, an arc-shaped fixing platform upper component, a fixing baffle, an arc-shaped fixing platform lower component, a platform positioning plate and a T-shaped groove positioning plate; the embedding cylinder is of a cylindrical structure with a hole at the center, and the dental implant sample is encapsulated by the embedding and fixing material and then is in interference fit with the hole at the center of the embedding cylinder; the upper surface of the upper component of the arc-shaped fixed platform is provided with a cylindrical mounting groove which is in clearance fit with the embedding cylinder; an embedding cylinder compression screw is arranged on the side surface of the cylindrical mounting groove, penetrates through the upper component of the arc-shaped fixing platform and compresses the embedding cylinder; the upper component of the arc-shaped fixing platform is contacted with the lower component of the arc-shaped fixing platform through an arc surface, the bottom of the upper component of the arc-shaped fixing platform is connected with the fixing baffle, and the fixing baffle is matched with a T-shaped groove at the top of the lower component of the arc-shaped fixing platform and is used for adjusting the offset angle between the axial direction of the dental implant sample and the axial direction of the upper pressure head; the lower component of the arc-shaped fixed platform is fixed on a platform positioning plate, and the platform positioning plate can move linearly relative to the T-shaped groove positioning plate and adjust the position;
the water bath system comprises an elongated shaft, a connecting bottom plate, a dry-burning heating rod, a waterproof gasket, a water inlet joint, a water outlet joint, a waterproof thermocouple, a water bath cover, a positioning ring and a connecting cover; the lower part of the lengthened shaft is used for being connected with a mounting table of the testing machine, and the upper part of the lengthened shaft is connected with the connecting bottom plate through a flange; the connecting bottom plate is in threaded connection with the water bath cover, and the joint is sealed through the waterproof gasket; the water bath cover is connected with the positioning ring through a screw, and a magnet is arranged on the top surface of the positioning ring and is used for being connected with the connecting cover in a suction manner; the dry-burning heating rod is arranged in the connecting bottom plate and used for heating the bionic liquid in the water bath cover; the water bath cover is provided with the water inlet joint and the water outlet joint and is provided with the waterproof thermocouple; the water inlet joint and the water outlet joint are both connected with a water tank through a peristaltic pump to form bionic liquid circulation in the water bath cover; the waterproof thermocouple is used for measuring the temperature of the bionic liquid in the water bath cover; the waterproof thermocouple, the dry-burning heating rod and the peristaltic pump are all connected with a control device; the fixing system is placed inside the water bath system; the T-shaped groove positioning plate is fixedly connected to the upper surface of the connecting bottom plate.
Furthermore, the upper end of each double-ring stainless steel tension spring is connected with a first cylindrical head screw arranged on the circumferential surface of the compression disc, and the lower end of each double-ring stainless steel tension spring is connected with a first cylindrical head screw arranged on the circumferential surface of the sliding compression disc; the first cylindrical head screws arranged on the compression plate and the first cylindrical head screws arranged on the sliding pressure plate are the same in number and are in one-to-one correspondence; the first cylindrical head screw is arranged along the radial direction of the compression disc and the sliding pressure disc.
Further, arc fixed platform upper portion subassembly bottom is through first hexagon socket head cap set screw connection fixed stop, first hexagon socket head cap set screw by cylinder mounting groove bottom runs through.
Furthermore, the bottom of the lower assembly of the arc-shaped fixed platform is positioned by the positioning groove of the platform positioning plate and is fixed with the platform positioning plate through a third inner hexagonal fixing screw.
Further, two T type grooves are formed in the upper surface of the T type groove positioning plate, two rows of second inner hexagonal fixing screws penetrate through the platform positioning plate, a T type nut is installed at the bottom of each second inner hexagonal fixing screw, and the T type nuts are matched with the T type grooves of the T type groove positioning plate.
Furthermore, a plurality of heat dissipation holes which are radially communicated are uniformly distributed on the lengthened shaft.
Further, it includes integrated into one piece's last annular cap portion and lower annular cap portion to connect the lid, last annular cap portion be used for covering the position circle and with position circle suction is connected, down annular cap portion with water bath cover clearance fit and through the annular knurl screw of circumference equipartition with water bath cover is connected.
Further, the connection cover is provided with a central through hole for the compression system to extend into the water bath system.
The invention has the beneficial effects that:
the improved dental implant fatigue test fixture optimizes the fixing mode of the dental implant sample by arranging the embedding cylinder, and has the advantages of no deformation during clamping, no external force generation and convenient operation.
The improved dental implant fatigue test fixture has the advantages that due to the structural design of the compression system, the upper pressure head can freely move in a limited manner in a horizontal plane under the condition that horizontal external force interference exists in the experimental process, so that the interference of the horizontal external force is counteracted, and the condition that no transverse constraint exists in the standard is better met.
And thirdly, the improved dental implant fatigue test fixture is placed in a temperature-controlled bionic liquid environment, the temperature of the bionic liquid can be regulated and controlled to be constant through the thermocouple and the heating rod, and meanwhile, the total amount of the bionic liquid can be regulated and controlled to be constant by arranging the water inlet and the water outlet to be connected with the peristaltic pump, so that the actual oral environment can be better simulated, and the fatigue test has more practical significance.
Drawings
FIG. 1 is a perspective view of an improved dental implant fatigue test fixture provided in an embodiment of the present invention;
FIG. 2 is a front view of an improved dental implant fatigue test fixture provided by an embodiment of the present invention;
FIG. 3 is a left side view of an improved dental implant fatigue test fixture provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a disassembly of a compression system in an improved dental implant fatigue test fixture according to an embodiment of the present invention;
fig. 5 is a disassembled view of the fixing system in the improved dental implant fatigue test fixture provided by the embodiment of the invention.
Fig. 6 is a schematic disassembled view of a water bath system in the improved dental implant fatigue test fixture provided by the embodiment of the invention.
In the above figures: 1: lengthening a shaft; 2: dry-firing the heating rod; 3: connecting the bottom plate; 4: a waterproof gasket; 5: a T-shaped groove positioning plate; 6: a platform positioning plate; 7: an arc-shaped fixed platform lower component; 8: an arc-shaped fixed platform upper component; 9: an embedding cylinder; 10: a dental implant sample; 11: an upper pressure head; 12: a connecting rod; 13: a sliding platen; 14: a first cap screw; 15: a double-ring stainless steel tension spring; 16: a compact disc; 17: a thrust ball bearing core; 18: a replaceable platen; 19: a second cap screw; 20: embedding cylinder compression screws; 21: a first socket head cap screw; 22: fixing a baffle plate; 23: a second socket head cap fixing screw; 24: a third socket head cap fixing screw; 25: a water inlet joint; 26: a water outlet joint; 27: a waterproof thermocouple; 28: a water bath cover; 29: knurling screws; 30: positioning rings; 31: a connecting cover; 32: and (4) air holes.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 3, the present embodiment provides an improved dental implant fatigue test fixture, which mainly comprises a compression system, a fixing system and a water bath system.
As shown in fig. 4, the compression system mainly includes an upper pressure head 11, a connecting rod 12, a sliding pressure plate 13, a compression plate 16, a thrust ball bearing core 17 and a replaceable pressure plate 18, wherein the upper pressure head 11, the connecting rod 12, the sliding pressure plate 13, the compression plate 16, the thrust ball bearing core 17 and the replaceable pressure plate 18 are coaxially arranged.
The upper pressure head 11 has a main body of a rod-shaped cylindrical structure, a lower end for applying force to the dental implant sample 10, and an upper end provided with an external thread for being in threaded connection with a lower end of the connecting rod 12.
The main body of the connecting rod 12 is of a rod-shaped cylindrical structure, the lower end of the connecting rod is provided with an internal thread for connecting the upper pressure head 11, and the upper end of the connecting rod is provided with an external thread for being in threaded connection with the center of the bottom of the sliding pressure plate 13.
The main body of the sliding pressure plate 13 is of a disc-shaped cylindrical structure, the bottom surface of the sliding pressure plate is provided with a lower connecting part, the center of the lower connecting part is provided with a threaded hole arranged along the vertical direction, and the threaded hole is used for being in threaded connection with the upper end of the connecting rod 12; the top surface of the disc-shaped cylindrical structure is provided with an upper connecting part and an upper groove, the upper groove is used for installing the replaceable pressure plate 18, and the center of the groove is provided with a threaded blind hole.
The main body of the replaceable pressure plate 18 is of a disc-shaped cylindrical structure, a vertical threaded hole is formed in the center of the main body, a second cylindrical head screw 19 is installed after the vertical threaded hole is aligned with a threaded blind hole in a groove in the upper portion of the sliding pressure plate 13, and the replaceable pressure plate 18 and the sliding pressure plate 13 are fixedly connected through the second cylindrical head screw 19. The replaceable pressure plate 18 is used for point contact with the steel balls of the thrust ball bearing core 17 and is a replaceable dismounting part.
The thrust ball bearing core 17 is composed of steel balls and an annular fixing device and is the core of the whole compression system.
The compression disc 16 has a disc-shaped cylindrical body with a lower convex surface on the bottom. A replaceable pressure plate 18 is arranged in an upper groove of the sliding pressure plate 13, and then a thrust ball bearing core 17 is coaxially arranged, so that a lower convex surface of the compression plate 16 is in contact with the upper surface of the thrust ball bearing core 17. The convex surface of the lower part of the compression disc 16 is convenient to be in point contact with the steel balls of the thrust ball bearing core 17, and the precision machining area is reduced. The upper end of the compression disc 16 is provided with a columnar connector, and the columnar connector is provided with an external thread for connecting a force application pressure head of the testing machine.
The compression disc 16 and the sliding pressure plate 13 are connected through a plurality of double-ring stainless steel tension springs 15 which are circumferentially and uniformly distributed, and each double-ring stainless steel tension spring 15 is arranged along the axial direction of the compression disc 16 and the axial direction of the sliding pressure plate 13. The upper end of each double-ring stainless steel tension spring 15 is connected with a first cylindrical head screw 14 arranged on the circumferential surface of the compression disc 16, and the lower end of each double-ring stainless steel tension spring is connected with a first cylindrical head screw 14 arranged on the circumferential surface of the sliding pressure disc 13. The first cylindrical head screws 14 arranged on the compression plate 16 and the first cylindrical head screws 14 arranged on the sliding pressure plate 13 are the same in number and correspond to each other one by one. The first plurality of cap screws 14 of the compression disc 16 are respectively screwed into a plurality of annularly and uniformly distributed threaded holes of the compression disc 16, and each threaded hole is radially arranged along the compression disc 16. A plurality of first socket head screws 14 of the sliding pressure plate 13 are respectively in threaded connection with a plurality of annularly and uniformly distributed threaded holes of the sliding pressure plate 13, and each threaded hole is radially arranged along the sliding pressure plate 13. The sliding pressure plate 13 can freely slide in a limited horizontal direction range through the axial connection of the double-ring stainless steel tension spring 15, so that the upper pressure head 11 can be driven to horizontally move below the replaceable pressure plate 18 when horizontal external force interference exists, the external force interference on a horizontal plane is counteracted, and the condition that no transverse constraint exists in the standard is better met.
As shown in fig. 5, the fixing system mainly comprises an embedding cylinder 9, an arc-shaped fixing platform upper component 8, a fixing baffle 22, an arc-shaped fixing platform lower component 7, a platform positioning plate 6 and a T-shaped groove positioning plate 5.
The embedding cylinder 9 is a cylinder structure with a central hole and can be made of pure copper materials. The dental implant sample 10 is sealed by the embedding and fixing material and then is in interference fit with the central opening of the embedding cylinder 9.
The 8 upper surfaces of arc fixed platform upper portion subassembly set up the cylinder mounting groove, and this cylinder mounting groove is used for with the 9 clearance fit of an embedding section of thick bamboo. The side surface of the cylindrical mounting groove is provided with a threaded hole for mounting an embedding cylinder compression screw 20, and the embedding cylinder compression screw 20 passes through the upper component 8 of the arc-shaped fixing platform and compresses the embedding cylinder 9; due to the presence of the embedding cylinder 9, the dental implant sample 10 is not affected by external forces generated when the embedding cylinder compression screw 20 is tightened. The bottom of the columnar mounting groove is provided with a threaded through hole which is used for penetrating and installing a first inner hexagonal fixing screw 21.
The arc-shaped fixing platform upper component 8 and the arc-shaped fixing platform lower component 7 are matched through an arc surface, and the angle of the dental implant sample 10 axially deviating from the axial direction of the upper pressure head 11 can be adjusted. The middle position of the arc surface of the arc-shaped fixed platform lower component 7 is provided with a T-shaped groove, and the lower half part of the T-shaped groove is wider than the upper half part. Fixed stop 22 is installed to the bottom of arc fixed platform upper portion subassembly 8, and fixed stop 22 installs in the T type groove the latter half of arc fixed platform lower part subassembly 7. The fixed baffle 22 is fixed by a first socket head cap fixing screw 21 passing through the arc-shaped fixed platform upper assembly 8, and the first socket head cap fixing screw 21 is coaxially arranged with the embedding cylinder 9.
The upper surface of the platform positioning plate 6 is provided with a positioning groove for seating therein the arc-shaped fixed platform lower assembly 7. The arc-shaped fixed platform lower component 7 is fixedly connected with the platform positioning plate 6 through a plurality of third hexagon socket head cap screws 24.
Two T-shaped grooves are formed in the upper surface of the T-shaped groove positioning plate 5, and the lower half portion of each T-shaped groove is wider than the upper half portion. The platform positioning plate 6 is connected with the T-shaped groove of the T-shaped groove positioning plate 5 through two rows of second inner hexagonal fixing screws 23 and T-shaped nuts, so that the platform positioning plate 6 can linearly move along the T-shaped groove of the T-shaped groove positioning plate 5, and the position of the platform positioning plate 6 relative to the T-shaped groove positioning plate 5 is adjusted.
As shown in fig. 6, the water bath system mainly includes an extension shaft 1, a dry-fire heating rod 2, a connection base plate 3, a waterproof gasket 4, a water inlet connector 25, a water outlet connector 26, a waterproof thermocouple 27, a water bath cover 28, a positioning ring 30, and a connection cover 31.
The lengthened shaft 1 comprises a central cylinder body, a plurality of radiating holes are uniformly distributed in the central cylinder body, and the radiating holes are radially communicated along the central cylinder body; the upper part and the lower part of the central cylinder are respectively provided with a flange plate, the flange plate at the upper part is fixedly connected with the connecting bottom plate 3 through screws, and the flange plate at the lower part is fixedly connected with the mounting table of the testing machine through screws.
The connecting bottom plate 3 is coaxially connected with the lengthened shaft 1, and the connecting bottom plate 3 is provided with a radial mounting hole which is in clearance fit with the dry-burning heating rod 2. The dry-fire heating rod 2 is used for heating the bionic liquid in the water bath cover 28.
The water bath cover 28 is a cylinder with an opening at the upper and lower parts and a cavity, the bottom of the water bath cover is connected with the connecting bottom plate 3 through threads, and the joint is sealed by an annular waterproof gasket 4. The top surface of the water bath cover 28 is provided with a plurality of threaded holes which are circumferentially and uniformly distributed and used for being connected with the positioning ring 30 through screws. The side wall of the water bath cover 28 is provided with a water inlet joint 25 and a water outlet joint 26, and is provided with a waterproof thermocouple 27. Wherein, water supply connector 25, play water connector 26 are the straight line setting in the vertical direction to all be connected with the water tank through the peristaltic pump, form the inside bionical liquid circulation of water bath cover 28.
The positioning ring 30 is circumferentially and uniformly provided with a plurality of through holes which are axially communicated and used for being connected with the top surface of the water bath cover 28 through screws. The top surface of the positioning ring 30 is provided with an annular groove and a magnet is arranged in the annular groove and is used for being connected with the connecting cover 31 through suction. Connecting cover 31 includes integrated into one piece's upper ring lid portion and lower ring lid portion, and the external diameter of upper ring lid portion is greater than lower ring lid portion, and upper ring lid portion is used for covering position circle 30 and its lower surface is connected through magnet suction with position circle 30, and the external diameter of lower ring lid portion and the water bath cover 28 internal diameter clearance fit. A plurality of threaded holes are uniformly distributed on the circumferential direction of the lower annular cover part of the connecting cover 31 and are used for corresponding to the through holes uniformly distributed on the circumferential direction of the water bath cover 28, and the water bath cover 28 and the connecting cover 31 are connected through mounting knurled screws 29. The connection cover 31 is provided with a central through hole for coaxially extending the compression system into the water bath system from the outside, and an air hole 32 is provided at the upper ring cover part for heat dissipation of the surplus heat.
The waterproof thermocouple 27, the dry-burning heating rod 2 and the peristaltic pump are all connected with a control device through leads, and the total amount of liquid and the temperature of the bionic liquid environment can be kept unchanged by controlling the peristaltic pump and the dry-burning heating rod 2 after the bionic liquid is added into the water bath cover 28.
The fixing system is arranged in the water bath system, and the upper part of the connecting bottom plate 3 is fixed with the T-shaped groove positioning plate 5 through screws.
The improved dental implant fatigue test fixture has the following assembling process:
(1) the lengthened shaft 1 and the mounting table of the testing machine are fixed through screws.
(2) The connection base plate 3 and the extension shaft 1 are fixed by screws.
(3) The T-shaped groove positioning plate 5 and the connecting bottom plate 3 are fixed through screws.
(4) The embedding cylinder 9 is filled with a suitable embedding fixture material and the dental implant specimen 10 is inserted vertically just before solidification.
(5) The embedding cylinder 9 with the encapsulated dental implant sample 10 is arranged in the cylindrical mounting groove of the upper component 8 of the arc-shaped fixing platform and is fixed by the embedding cylinder compression screw 20.
(6) The arc-shaped fixing platform lower component 7 and the arc-shaped fixing platform upper component 8 are matched through the arc surfaces, after the axial angle of the upper pressure head 11 of the axial deviation of the dental implant sample 10 is adjusted, a first inner hexagonal fixing screw 21 is screwed, and the arc-shaped fixing platform lower component 7 and the arc-shaped fixing platform upper component 8 are connected through a fixing baffle 22.
(7) The lower part of the arc-shaped fixed platform lower component 7 is in clearance fit with the positioning groove on the upper surface of the platform positioning plate 6 and is fixed by a third hexagon socket head cap fixing screw 24.
(8) And the platform positioning plate 6 and the T-shaped groove positioning plate 5 are connected through a second inner hexagonal fixing screw 23 and a T-shaped nut. Firstly, a T-shaped nut is arranged in a T-shaped groove of the T-shaped groove positioning plate 5, then a second inner hexagonal fixing screw 23 and the T-shaped nut are connected, the second inner hexagonal fixing screw 23 is not screwed down, and after the relative position of the platform positioning plate 6 on the T-shaped groove positioning plate 5 is adjusted as required, the second inner hexagonal fixing screw 23 is screwed down for fixing.
(9) The waterproof gasket 4 is sleeved on the connecting bottom plate 3, the water bath cover 28 is connected with the connecting bottom plate 3 through threads, the positioning ring 30 is installed on the upper portion of the water bath cover 28 through screws, and the magnet is installed in a groove in the top of the positioning ring 30. The lower annular cover part of the connecting cover 31 is clearance fitted with the water bath cover 28 and fixed by knurled screws 29.
(10) The water bath cover 28 and the connecting bottom plate 3 are provided with the dry-burning heating rod 2, a water inlet connector 25, a water outlet connector 26 and a waterproof thermocouple 27, and the water bath water inlet connector 25 and the water bath water outlet connector 26 are connected with the peristaltic pump and the water tank through pipes. And finally, the peristaltic pump, the dry-burning heating rod 2 and the waterproof thermocouple 27 are connected with a control device through leads.
(11) The upper ram 11 and the connecting rod 12 are connected by screw threads, while the connecting rod 12 and the sliding platen 13 are connected by screw threads. The replaceable pressure plate 18 is placed in a recess in the upper part of the sliding pressure plate 13 and is fixed by means of a second cylindrical head screw 19. A thrust ball bearing core 17 is placed in a lower groove of the compression disc 16, and the compression disc 16 and the sliding pressure plate 13 are connected by a first cylindrical head screw 14 and a double-ring stainless steel tension spring 15. And finally, connecting the compression disc 15 with a force application pressure head of the testing machine.
(12) The force applying indenter of the tester is adjusted so that the upper indenter 11 is in contact with the dental implant sample 10.
(13) And (4) selecting an additionally-installed bionic liquid environment according to experimental environment requirements, and setting the environment temperature of the control device and the flow of the peristaltic pump.
(14) Adjusting the mechanical loading condition of the tester, and starting the experiment.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the scope of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An improved dental implant fatigue test fixture is characterized by comprising a compression system, a fixing system and a water bath system;
the compression system comprises an upper pressure head, a connecting rod, a sliding pressure plate, a compression plate, a thrust ball bearing core and a replaceable pressure plate which are coaxially arranged; the upper pressure head is connected to the center of the bottom of the sliding pressure plate through the connecting rod, and the bottom of the upper pressure head is used for applying force to the dental implant sample; the replaceable pressure plate is arranged on the sliding pressure plate through an upper groove and is fixedly connected with the sliding pressure plate through a center through screw; the thrust ball bearing core is arranged between the replaceable pressure plate and the compression plate and is respectively contacted with the upper surface of the replaceable pressure plate and the lower convex surface of the compression plate; the center of the top of the compression disc is used for being connected with a force application pressure head of the testing machine; the compression disc and the sliding pressure disc are connected through a plurality of double-ring stainless steel tension springs which are circumferentially and uniformly distributed, and each double-ring stainless steel tension spring is arranged along the axial direction of the compression disc and the sliding pressure disc;
the fixing system comprises an embedding cylinder, an arc-shaped fixing platform upper component, a fixing baffle, an arc-shaped fixing platform lower component, a platform positioning plate and a T-shaped groove positioning plate; the embedding cylinder is of a cylindrical structure with a hole at the center, and the dental implant sample is encapsulated by the embedding and fixing material and then is in interference fit with the hole at the center of the embedding cylinder; the upper surface of the upper component of the arc-shaped fixed platform is provided with a cylindrical mounting groove which is in clearance fit with the embedding cylinder; an embedding cylinder compression screw is arranged on the side surface of the cylindrical mounting groove, penetrates through the upper component of the arc-shaped fixing platform and compresses the embedding cylinder; the upper component of the arc-shaped fixing platform is contacted with the lower component of the arc-shaped fixing platform through an arc surface, the bottom of the upper component of the arc-shaped fixing platform is connected with the fixing baffle, and the fixing baffle is matched with a T-shaped groove at the top of the lower component of the arc-shaped fixing platform and is used for adjusting the offset angle between the axial direction of the dental implant sample and the axial direction of the upper pressure head; the lower component of the arc-shaped fixed platform is fixed on a platform positioning plate, and the platform positioning plate can move linearly relative to the T-shaped groove positioning plate and adjust the position;
the water bath system comprises an elongated shaft, a connecting bottom plate, a dry-burning heating rod, a waterproof gasket, a water inlet joint, a water outlet joint, a waterproof thermocouple, a water bath cover, a positioning ring and a connecting cover; the lower part of the lengthened shaft is used for being connected with a mounting table of the testing machine, and the upper part of the lengthened shaft is connected with the connecting bottom plate through a flange; the connecting bottom plate is in threaded connection with the water bath cover, and the joint is sealed through the waterproof gasket; the water bath cover is connected with the positioning ring through a screw, and a magnet is arranged on the top surface of the positioning ring and is used for being connected with the connecting cover in a suction manner; the dry-burning heating rod is arranged in the connecting bottom plate and used for heating the bionic liquid in the water bath cover; the water bath cover is provided with the water inlet joint and the water outlet joint and is provided with the waterproof thermocouple; the water inlet joint and the water outlet joint are both connected with a water tank through a peristaltic pump to form bionic liquid circulation in the water bath cover; the waterproof thermocouple is used for measuring the temperature of the bionic liquid in the water bath cover; the waterproof thermocouple, the dry-burning heating rod and the peristaltic pump are all connected with a control device; the fixing system is placed inside the water bath system; the T-shaped groove positioning plate is fixedly connected to the upper surface of the connecting bottom plate.
2. The improved dental implant fatigue test fixture of claim 1, wherein each of the two rings of stainless steel tension springs has an upper end connected to a first cylindrical head screw mounted on a circumference of the compression plate and a lower end connected to a first cylindrical head screw mounted on a circumference of the sliding compression plate; the first cylindrical head screws arranged on the compression plate and the first cylindrical head screws arranged on the sliding pressure plate are the same in number and are in one-to-one correspondence; the first cylindrical head screw is arranged along the radial direction of the compression disc and the sliding pressure disc.
3. The improved dental implant fatigue test fixture of claim 1, wherein the bottom of the upper assembly of the arc-shaped fixing platform is connected to the fixing baffle plate by a first socket head cap fixing screw, and the first socket head cap fixing screw is penetrated by the bottom of the cylindrical mounting groove.
4. The improved dental implant fatigue test fixture of claim 1, wherein the bottom of the lower assembly of the arc-shaped fixing platform is positioned by the positioning recess of the platform positioning plate and fixed to the platform positioning plate by a third socket head cap screw.
5. The improved dental implant fatigue test fixture of claim 1, wherein two T-shaped grooves are formed in the upper surface of the T-shaped groove positioning plate, two rows of second socket head cap fixing screws penetrate through the platform positioning plate, a T-shaped nut is mounted at the bottom of each second socket head cap fixing screw, and the T-shaped nuts are matched with the T-shaped grooves of the T-shaped groove positioning plate.
6. The improved dental implant fatigue test fixture of claim 1, wherein the elongated shaft has a plurality of radially extending heat dissipation holes.
7. The improved dental implant fatigue test fixture of claim 1, wherein the connection cover comprises an upper ring cover part and a lower ring cover part which are integrally formed, the upper ring cover part is used for covering the positioning ring and is connected with the positioning ring in a suction manner, and the lower ring cover part is in clearance fit with the water bath cover and is connected with the water bath cover through knurled screws which are uniformly distributed in the circumferential direction.
8. The improved dental implant fatigue test fixture of claim 7, wherein the connecting cap is provided with a central through hole for the compression system to extend into the water bath system.
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| CN202210175880.0A CN114563264B (en) | 2022-02-24 | 2022-02-24 | Improved generation dental implant fatigue test anchor clamps |
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| CN115524221A (en) * | 2022-09-26 | 2022-12-27 | 广东健齿生物科技有限公司 | Implant drawing test method |
| CN115524221B (en) * | 2022-09-26 | 2024-04-09 | 广东健齿生物科技有限公司 | Implant pulling test method |
| CN116448531A (en) * | 2023-06-16 | 2023-07-18 | 广东健齿生物科技有限公司 | Dental implantation system embedding device |
| CN116448531B (en) * | 2023-06-16 | 2023-10-20 | 广东健齿生物科技有限公司 | Dental implantation system embedding device |
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Effective date of registration: 20231219 Address after: 300350, Building 5, Tianjin Science and Technology Plaza, Science and Technology West Road, Nankai District, Tianjin, 0606 (Tiankai Park) Patentee after: Kaier Instrument (Tianjin) Co.,Ltd. Address before: 300350 Haijing garden, Haihe Education Park, Jinnan, Tianjin, 135, Tianjin University. Patentee before: Tianjin University |
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