CN105158060A - Simulation determination method of alveolar bone stress after vertical fractured and bonded posterior tooth replantation - Google Patents
Simulation determination method of alveolar bone stress after vertical fractured and bonded posterior tooth replantation Download PDFInfo
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- CN105158060A CN105158060A CN201510621253.5A CN201510621253A CN105158060A CN 105158060 A CN105158060 A CN 105158060A CN 201510621253 A CN201510621253 A CN 201510621253A CN 105158060 A CN105158060 A CN 105158060A
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- silicon rubber
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- alveolar bone
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Abstract
The invention discloses a simulation determination method of alveolar bone stress after vertical fractured and bonded posterior tooth replantation. The simulation determination method comprises the steps of vertical fractured posterior tooth manufacturing, bonded posterior tooth manufacturing, epoxy resin layer manufacturing, bonded posterior tooth replantation and elastic modulus determination. The simulation determination method of alveolar bone stress after vertical fractured and bonded posterior tooth replantation is high in operability as well as good in simulation and research performance and can analyze the stress condition of an alveolar bone; an epoxy resin layer manufactured with the liquid resin preparation method is similar to the alveolar bone, and the physical properties and mechanical properties are similar; a model manufactured with a method of manufacturing a replantation dental bone bonding healing model can solve the problem that a replantation in-vitro biomechanical model can not qualitatively simulate difference of alveolar bone elastic modulus due to the fact that physical parameters and mechanical properties are not similar to actual tissues.
Description
Technical field
The present invention relates to dental biomechanics simulated determination method, particularly relate to a kind of simulated determination backteeth indulge folded knot replant the stressed method of rear alveolar bone.
Background technology
Now, jackknifing backteeth is taked to treat rear reservation more and more, to reduce agomphosis, and protection denture integrality.Outside mouthful, the bonding method of replanting is the new method that treatment backteeth indulges folding, and be a kind of comprehensive therapy means integrating tooth replantation technology, Wicresoft's exodontia technology, high dominance energy bonding technology and paradenlal tissue regeneration technology, clinical short term efficacy still can.This methods for the treatment of needs to be based upon on the Research foundation of dental biomechanics.
In the dental biomechanics environment of complexity, tooth jackknifing is a complicated mechanical process, and its position, direction and the degree of depth are all difficult to unified.Dental biomechanics mainly studies the relevant mechanics problem of mouth motion, and its research contributes to analyzing jackknifing tooth complicated mechanics suffered in mouth motion process.This research needs by means of dental biomechanics model.But the biomechanical model set up at present all adopts common self curing plastic as embedding base, and self curing plastic is because physical parameter and mechanical property are with actual tissue and dissmilarity, causes model can not simulate the actual conditions of human body alveolar bone.
Elastic modulus refers in elastic range, the ratio of the corresponding strain that stress suffered by material (as stretched, compression, bends, distortion, shears) produces to material.Elastic modulus reflects the complexity of material repels distortion, stability when determining stressed, the transmission of counter stress and be distributed with direct relation, is the important mechanical performance index of material.Indirectly can be obtained the elastic modulus of alveolar bone by the elastic modulus of rating model, analyze the stressing conditions of alveolar bone.
Summary of the invention
The object of the present invention is to provide a kind of simulated determination backteeth to indulge folded knot and replant the stressed method of rear alveolar bone, the method strong operability, simulation are good, research performance is good, can analyze the stressing conditions of alveolar bone;
Another object of the present invention is to provide a kind of liquid resinous method for making, the physical parameter of the epoxy resin layer formed after the liquid resin solidification that the method makes is similar to alveolar bone with mechanical property;
Another object of the present invention is to provide a kind of and makes the method for replanting ankylosis of tooth healed model of described liquid resin, with the model that the method makes can solve replant external biological mechanical model can not the problem of deterministic simulation alveolar bone elastic modulus difference because of physical parameter and mechanical property and actual tissue dissmilarity.
The object of the invention is to be achieved through the following technical solutions:
Simulated determination backteeth is indulged folded knot and is replanted the stressed method of rear alveolar bone, comprises the steps:
(1) make vertical folding backteeth: the middle-distant direction along posterior occlusion face grinds a groove, is rived by bizet to furcation area along long axis of tooth, backteeth is divided into two parts of vertical folding, form vertical folding backteeth;
(2) bonding backteeth is made: with cementing agent bonding vertical folding backteeth section, remove surface residual cementing agent after solidification completely, guarantee do not have crackle, form bonding backteeth;
(3) epoxy resin layer is made: 618 type epoxy resin, polyamide and chemical pure diethylentriamine are mixed after preparing 100:25 ~ 35:1 ~ 5 in mass ratio, mix to be placed on and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, shake while stirring, avoid producing bubble as far as possible, vacuum defoamation 3 ~ 7min, again put and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, surface drips 1 ~ 2 defoamer, forms liquid resin; By liquid resin slowly adherent watering cast from silicon rubber mould, until apart from silicon rubber mould upper edge hole 2.5 ~ 3.5mm place, formation epoxy resin layer;
(4) backteeth that bonds is implanted: cover one deck preservative film at silicon rubber mould upper edge hole, and before liquid resin solidifies, the backteeth that will bond is through preservative film, make the neat enamelo-cemental junction of preservative film, root of the tooth is implanted in liquid resin, corona outside liquid resin, the demoulding after room temperature leaves standstill 24-48 hour;
(5) elastic modulus detection: measure epoxy resin layer compressive modulus of elasticity with loading head augmentor, machine records load, displacement, stress and strain automatically, draws stress-strain curve, calculates elastic mould value.
Further, described cementing agent is Super-BondC & B cementing agent.Cementing agent also can use other resinoid bonds, and as ClearfilSEBond cementing agent and SingleBond cementing agent, but not only cohesive force is very strong for Super-BondC & B cementing agent, and Expected Results is better.
Further, described silicon rubber mould makes in the steps below: the right cylinder formpiston making bottom surface radius 10 ~ 20mm, high 25 ~ 35mm of super hard gypsum, Silatec silicon rubber turns over makes former, obtains silicon rubber mould, at silicon rubber mould inwall coating silicone oil before using.The silicon rubber mould being coated with silicone oil is easy to the demoulding.
A kind of liquid resin for simulating alveolar bone, make by the following method: 618 type epoxy resin, polyamide and chemical pure diethylentriamine are mixed after preparing 100:25 ~ 35:1 ~ 5 in mass ratio, mix to be placed on and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, shake while stirring, avoid producing bubble, vacuum defoamation 3 ~ 7min as far as possible, again put and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, surface drips 1 ~ 2 defoamer, forms liquid resin.The liquid resin that described proportioning is made, can produce the epoxy resin layer similar to actual alveolar bone physical property, more adequately Reality simulation alveolar bone.
Described liquid resin replants the method for ankylosis of tooth healed model for making, comprising: by liquid resin slowly adherent watering cast from described silicon rubber mould, until apart from silicon rubber mould upper edge hole 2.5 ~ 3.5mm place; Cover one deck preservative film at silicon rubber mould upper edge hole, before liquid resin solidifies, the backteeth that will bond is through preservative film, make the neat enamelo-cemental junction of preservative film, root of the tooth is implanted in liquid resin, and corona is outside liquid resin, the demoulding after room temperature leaves standstill 24-48 hour, is formed and replants ankylosis of tooth healed model.Preservative film can fix bonding backteeth easily.
Further, by liquid resin slowly adherent watering cast from silicon rubber mould, until apart from silicon rubber mould upper edge hole 3mm place.
Further, described silicon rubber mould makes in the steps below: the right cylinder formpiston making bottom surface radius 10 ~ 20mm, high 25 ~ 35mm of super hard gypsum, Silatec silicon rubber turns over makes former, obtains silicon rubber mould, at silicon rubber mould inwall coating silicone oil before using.
Advantage of the present invention:
(1) method provided by the invention can measure the elastic modulus of alveolar bone easily by the compressive modulus of elasticity measuring epoxy resin layer, and simulated determination backteeth is indulged folded knot and replanted rear alveolar bone stressing conditions.
(2) liquid resinous method for making provided by the invention can produce the physical parameter epoxy resin layer similar to actual alveolar bone with mechanical property, can Mouthsimulator truth well.
(3) stress replanting all directions when ankylosis of tooth healed model effectively can transmit loading provided by the invention, can Mouthsimulator truth well, can solve replant in vitro study biomechanical model because of physical parameter and mechanical property and actual tissue dissimilar and can not the problem of simulated determination alveolar bone elastic modulus.
Accompanying drawing explanation
Fig. 1 is vertical folding backteeth and bonding backteeth schematic diagram;
Fig. 2 replants ankylosis of tooth healed model schematic diagram.
In figure: 1, vertical folding backteeth; 2, bond backteeth; 3, tack coat; 4, epoxy resin layer; 5, the backteeth that bonds implants groove.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Grind a thin groove with emery car pin along the middle-distant direction in posterior occlusion face, fixing teeth, is rived to furcation area along long axis of tooth by bizet with osteotome, backteeth is divided into two parts of vertical folding, forms vertical folding backteeth 1, see Fig. 1.With the section of Super-BondC & B cementing agent bonding vertical folding backteeth 1, form bonding backteeth 2, centre is tack coat 3.After solidifying completely, remove the cementing agent of surface residual with ultrasonic scaler, stereomicroscope inspection, guarantees do not have crackle.By 618 type epoxy resin, polyamide and chemical pure diethylentriamine in mass ratio 100:30:3 prepare, mix to be placed on and heat tune in 60oC calibration cell and mix 5min, shake while stirring, avoid producing bubble as far as possible, vacuum defoamation 5min, constant temperature stirs 5min again, and surface drips 2 defoamers, makes liquid epoxy resin.By the epoxy resin of liquid state slowly adherent watering cast from silicon rubber mould, until apart from this mould bead 3mm place; Be suspended in liquid resin by bonding backteeth 2 through preservative film, root of the tooth is inserted in liquid resin, and corona exposes outside resin, the neat enamelo-cemental junction of preservative film, with fixing bonding backteeth, room temperature leaves standstill, the demoulding after 24-48 hour, is formed shown in Fig. 2 and replants ankylosis of tooth healed model.
Select should to select during backteeth that form is similar, less, the double joint of making a variation, have the backteeth at typical furcation area position.Select the backteeth of this shape specification can accurate simulation backteeth indulge folded knot replant rear alveolar bone stressing conditions, test result is representative.The Super-BondC & B cementing agent selected when making vertical folding backteeth not only cohesive force is very strong, and Expected Results is better.
618 type epoxy resin, the mass ratio of polyamide and chemical pure diethylentriamine can make the epoxy resin layer comparatively close with actual alveolar bone physical property within the specific limits, the temperature of heated at constant temperature stirring and vacuum defoamation, time does not have too large impact in the fluctuation of certain limit yet, acceptable scope is as follows: by 618 type epoxy resin, polyamide and chemical pure diethylentriamine in mass ratio 100:25 ~ 35:1 ~ 5 mix after preparing, mix to be placed on and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, shake while stirring, avoid producing bubble as far as possible, vacuum defoamation 3 ~ 7min, again put and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, surface drips 1 ~ 2 defoamer, form liquid resin.
Silicon rubber mould method for making is: the right cylinder formpiston making bottom surface radius 15mm, high 30mm of super hard gypsum, this right cylinder formpiston is vertically put into uncovered square glass vessel, slowly in these vessel, pour liquid Silatec silicon rubber into, room temperature leaves standstill about 12 hours, take out from glassware, remove right cylinder formpiston, obtain silicon rubber mould, at silicon rubber mould inwall coating silicone oil before using.Right cylinder formpiston bottom surface radius is in 10 ~ 20mm scope, high within the scope of 25 ~ 35mm.
After model is set up, by measuring epoxy resin layer elastic modulus simulated determination alveolar bone elastic modulus indirectly.According to the requirement of GB/T2569-1995 standard test epoxy resin compressive modulus of elasticity, with loading head augmentor test compression elastic modulus: setting test speed is 1mm/min, continuous loading, machine records load, displacement, stress and strain automatically, draw stress-strain curve, calculate elastic mould value (Mpa).Get 3 test specimen mean values, i.e. the compressive modulus of elasticity of this epoxy resin.Test result is in table 1.
The epoxy resin layer elastic modulus that proportioning used makes is 1428.668 ± 170.090Mpa, and the elastic modulus 1370Mpa of alveolar bone recorded by document, and the two numerical approximation, illustrates that the present invention can simulate alveolar bone truth well.The epoxy resin layer maximum weighted that in test, the present invention's proportioning used makes is 6.999 ± 0.294kN.Human maximum Biting force results from maxillary first molar, is about 500N, and far below the maximal force that test specimen destroys, illustrate that the model anti-pressure ability using the present invention to make is strong, embedding base endurance is good.Therefore ankylosis of tooth healed model of replanting provided by the invention may be used for oral cavity mechanics study.
Table 1 epoxy resin elastic modulus (Mpa) measurement result
Claims (7)
1. simulated determination backteeth is indulged folded knot and is replanted the stressed method of rear alveolar bone, it is characterized in that comprising the steps:
(1) make vertical folding backteeth: the middle-distant direction along posterior occlusion face grinds a groove, is rived by bizet to furcation area along long axis of tooth, backteeth is divided into two parts of vertical folding, form vertical folding backteeth;
(2) bonding backteeth is made: with cementing agent bonding vertical folding backteeth section, remove surface residual cementing agent after solidification completely, guarantee do not have crackle, form bonding backteeth;
(3) epoxy resin layer is made: 618 type epoxy resin, polyamide and chemical pure diethylentriamine are mixed after preparing 100:25 ~ 35:1 ~ 5 in mass ratio, mix to be placed on and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, shake while stirring, avoid producing bubble as far as possible, vacuum defoamation 3 ~ 7min, again put and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, surface drips 1 ~ 2 defoamer, forms liquid resin; By liquid resin slowly adherent watering cast from silicon rubber mould, until apart from silicon rubber mould upper edge hole 2.5 ~ 3.5mm place, formation epoxy resin layer;
(4) backteeth that bonds is implanted: cover one deck preservative film at silicon rubber mould upper edge hole, and before liquid resin solidifies, the backteeth that will bond is through preservative film, make the neat enamelo-cemental junction of preservative film, root of the tooth is implanted in liquid resin, corona outside liquid resin, the demoulding after room temperature leaves standstill 24-48 hour;
(5) elastic modulus detection: measure epoxy resin layer compressive modulus of elasticity with loading head augmentor, machine records load, displacement, stress and strain automatically, draws stress-strain curve, calculates elastic mould value.
2. simulated determination backteeth according to claim 1 is indulged folded knot and is replanted the stressed method of rear alveolar bone, it is characterized in that: described cementing agent is Super-BondC & B cementing agent.
3. simulated determination backteeth according to claim 1 and 2 is indulged folded knot and is replanted the stressed method of rear alveolar bone, it is characterized in that: described silicon rubber mould makes in the steps below: the right cylinder formpiston making bottom surface radius 10 ~ 20mm, high 25 ~ 35mm of super hard gypsum, Silatec silicon rubber turns over makes former, obtain silicon rubber mould, at silicon rubber mould inwall coating silicone oil before using.
4. one kind for simulating the liquid resin of alveolar bone, it is characterized in that making by the following method: 618 type epoxy resin, polyamide and chemical pure diethylentriamine are mixed after preparing 100:25 ~ 35:1 ~ 5 in mass ratio, mix to be placed on and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, shake while stirring, avoid producing bubble, vacuum defoamation 3 ~ 7min as far as possible, again put and heat tune in 55 ~ 65oC calibration cell and mix 3 ~ 7min, surface drips 1 ~ 2 defoamer, forms liquid resin.
5. liquid resin, for making the method for replanting ankylosis of tooth healed model, is characterized in that comprising as claimed in claim 4: by liquid resin slowly adherent watering cast from silicon rubber mould, until apart from silicon rubber mould upper edge hole 2.5 ~ 3.5mm place; Cover one deck preservative film at silicon rubber mould upper edge hole, before liquid resin solidifies, the backteeth that will bond is through preservative film, make the neat enamelo-cemental junction of preservative film, root of the tooth is implanted in liquid resin, and corona is outside liquid resin, the demoulding after room temperature leaves standstill 24-48 hour, is formed and replants ankylosis of tooth healed model.
6. the method for ankylosis of tooth healed model is replanted in making according to claim 5, it is characterized in that: by liquid resin slowly adherent watering cast from silicon rubber mould, until apart from silicon rubber mould upper edge hole 3mm place.
7. the simulated determination backteeth according to claim 5 or 6 is indulged folded knot and is replanted the stressed method of rear alveolar bone, it is characterized in that: described silicon rubber mould makes in the steps below: the right cylinder formpiston making bottom surface radius 10 ~ 20mm, high 25 ~ 35mm of super hard gypsum, Silatec silicon rubber turns over makes former, obtain silicon rubber mould, at silicon rubber mould inwall coating silicone oil before using.
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Application publication date: 20151216 |