Investigation of a new design for zirconia dental implants

Objective:To assess the biomechanical properties of a new design configuration for zirconia dental implants. Methods: The new design has a cylindrical shape that is partially hollow and porous in the bottom, which permits the implants to be locked into the alveolar bone over time. It also utilizes bioactive glass coatings to increase adhesion to surrounding bone structure. Samples of the new design were fabricated in the laboratory and their material strength, hardness, and fracture toughness were evaluated. In addition, biocompatibility of the new design was evaluated through testing in dogs. Results: Results of mechanical tests indicate that structural properties of the new design exceed the usual requirements for implants. Moreover, animal tests suggest that there is appreciable improvement in lock-in strength and osteointegration. Conclusion: The new design configuration is biomechanically feasible and further research is warranted to improve the design for human use.

牙齿脱位植入156例的临床分析

目的：探讨脱位牙齿156例植入，使其成活的影响因素以及失败的教训。方法：局麻下将牙齿再植入牙槽窝内，评估一下牙齿的位置是否正确，如不中意应轻轻地移动直到理想位置，如牙位正确，应行牙弓夹板固定，软组织处理及其它辅助治疗。结果：牙齿成活予否于牙齿在口外干燥时间长短，牙槽窝准备，牙弓夹板固定，辅助治疗等因素有关。结论：牙齿在口外干燥时间大于60min，就不必考虑牙齿活髓情况，应考虑进行牙体治疗植入。根尖开发，口外干燥时间小于60min者，根尖开发有血夜循环重建的潜力，牙根能继续发育。