Experimental Study Of Implant-bone Integrated Interface With New Type Implant

Oral implantology is an important part of prosthetic dentistry. Implant and bone can reach osseointegration and become a integrate, when implant embedded in jaw bones. When bearing the load in functional status, implant can transfer and disperse the load. In one hand, during transferring and dispersing the load, bone and implant will dislodge or deform even disorganize and so on. In another hand, some physiological potency will happen such as bone physiology metabolism and bone rebuilding. Investigation indicated that a succeed implant should reach osseointegration with bone, meanwhile should keep osseointegration in a long time. So biomechanical influence play an important role in success of implant. Higher implant-bone integrated force can avoid bone absorption which leads from the overloading in the edge of implant. Particularly, after the tooth missing, alveolar bone will unreversiblely absorb endlessly. The result is that alveolar bone becomes more and more narrow and flat. In finite dimension, designing a larger area implant can elevate the success of implant undoubtedly.This study talks about biomechanical test of new type implant: push-out test. Through random control test, comparing the implant-bone integrated force of two kinds of implant in different bone healing stage. Furthermore, with scanning electron microscope we observe implant-bone integrated interface of two kinds of implant. Thus, we hope providing academic and experimental basis for further designs and improvements of new type implant, making favorable foundation for clinical application.In different bone healing stage, the implant-bone integrated force of new type implant was statistically higher than cylinder implant, which had significance difference. Through time-change curve, we can see the implant-bone integrated force of two kinds of implant gradually increases. The implant-bone integrated force of new type implant increases very quickly in previous two months, and slightly steps down in third month. That of cylinder implant increases in linear type. All in all, the implant-bone integrated force of new type implant obviously exceeds that of cylinder implant.In third month, two kinds of implant and new bone become an integrate, bone deposited liking lamellar in surface of implants. There is no stratum intermedium between bone and implant. Surrounding the implants much calcium crystallization, new bone is forming obviously and the direction of trabecular pattern is discrepancy. Every position of new type implant is well gets in touch with bone. Newly formed bone has entered the disc structure of new type implant completely. The bone which entered the disc structure of new type implant also exists after pull-out test. So maybe the implant-bone integrated strength exceeds new bone's strength. It may be caused by the shape of new type implant: body shape and disc structure, new type implant has higher implant-bone integrated force comparmg with cylinder implant. New type implant is more appropriate to the patient with less residual alveolar bone and narrow alveolar ridge. Simultaneously load instantly or in earlier period may think over.