回顾分析种植体植入后早期失败的原因、失败后再次种植的治疗措施。方法:对6例种植体植入后早期发生感染、松动等未实现骨结合的病例进行回顾,从临床表现、脱落原因、2次种植治疗等方面分析,并对失败原因进行探讨、对再种植疗效进行评估。结果:2例失败原因为邻牙牙髓、根尖周病和种植体周围感染拔除原种植体后行种植窝刮治、抗炎、邻牙根管治疗和再次种植术;4例为种植体无骨结合,原种植窝处理后6个月再次植入种植体;6例均重新实现种植体骨结合。结论:种植体失败的预防措施应包括控制邻牙和牙周感染因素以及适应证的选择;种植失败后对原种植窝有效处理后再种植仍能取得良好的种植疗效。

Objective:To analyse the causes of early implantation failure and the therapeutic measures with re-implantation after the failures.Methods:6 cases of implantation failure including early infections,loosening and non-osteointegration were reviewed and trea-ted by re-implantation therapy,and the causes of failure were discussed and the effects of re-treatment were evaluated.Results:2 cases were found to be with infection of adjacent teeth after implantation and were treated by removal of the implant,socket curettage,root ca-nal therapy(RCT)and antibiotics followed by reimplantation.Implant loosening and non-osteointegration were observed in 4 cases, which were treated by the similar methods for the implant socket.Reimplantation was successful in all 6 cases followed-up for 1 -3 years.Conclusion:Preventive measure for implantation failure should include indication selection,control of infections in adjacent teeth and periodontosis,use of GBR technic and so on.Re-implantation following pro

目的：分析评价种植修复的远期效果。方法：将本院的最后一次复诊时,种植修复时间达到十年以上的病例纳入研究范围,对所植入的种植体功能状态,种植体周围组织的稳定性和种植体存留率等进行分析评价。结果：共211例患者,种植体845枚,符合本研究的纳入标准,仅为我院种植十年以上（1万多枚种植体）病例的很小部分。其中802枚种植体在正常行使功能,有33枚种植体曾有过修复机械并发症,种植体的存留率为94.9%。结论：研究表明我国的种植修复患者的长期回访率很低,本研究的结果虽不能完全反映我院种植十年以上病例的全部情况,但也能说明了种植修复治疗的远期可靠性。

Objective: To analyze the long-term result of implant restoration. Methods: The study included 211 patients with 845 implants. All patients with implant-supported prostheses were followed for at least 10 years. Survival rates, soft tissue health, and radiographic marginal bone loss of the implants were evaluated. Results: 43 implants failed during the first 3 years after placement and another 802 implants had stable fixed prostheses in function. The marginal bone loss around the implants was small and there were no signs of a peri-implant infection. The implant survival rate was 94.9%. Conclusions:Our study shows that follow-up rate of the patients with implant restoration is very low, the results of this study do not fully reflect the status of all cases with implant-supported prostheses more than a decade in our hospital, but can also demonstrate the long-term reliability of the implant restoration treatment.

目的探讨上颌窦内提升术植骨与不植骨对种植体骨整合的影响及两者之间的差异。方法将120枚需要进行内提升手术的种植体随机平均分为两组,第一组60枚为实验组,在上颌窦内提升后植入骨材料同期植入种植体;第二组60枚为对照组,上颌窦内提升后不植骨同期植入种植体。对两组种植体进行临床追踪(平均18个月),观察种植体骨整合、临床检查指标、种植体存留率及影像学变化。结果仅有1例种植体覆盖螺丝暴露,种植体颈部出现骨吸收。所有两组种植体均能完成修复,种植体存留率达到100%,无1例脱落。种植体均能正常行使咀嚼功能,骨整合良好。影像学检查种植体周围均有新骨生长,骨整合良好。结论上颌窦内提升术后不植骨可以取得与植骨同样的效果,可以明显减少患者的种植牙费用,是一种值得推广应用的手术方法。

Objective To investigate the effect of bone grafting on osseointegration of dental implant during maxillary sinus augmentation. Methods One hundred and twenty implants with maxillary sinus augmentation were divided into two groups. The experimental group included 60 implants which were placed simultaneously after osteotome sinus floor elevation with bone grafting; the control group (also 60 implants) otherwise without bone grafting. Implant osseointegration, clinical parameters, the implant survival rate and radiological finding of all implants were estimated after clinical tracking (average 18 months). Results Only one implant with its cover screw exposed and bone absorption in its neck was observed. All the implants were completed with the prosthetic rehabilitation. The implant survival rate was 100% and no implant lost. Efficient mastication and good osseointegration were obtained by all implants and new bone regeneration around implant was found by radiological examinatio

本文在对自然磨牙统计分析的基础上,确定拟自然牙双牙根种植体的几何参数,通过有限元方法分析拟自然牙双牙根种植体与单牙根种植体在下颌骨模型中的应力分布,比较其优劣性。方法:采用SPSS对自然磨牙进行统计分析,确定拟自然牙双牙根种植体的几何参数;在有限元软件中模拟咬合力加载,分析两种不同的种植体对于下颌骨的应力分布。结果:两种不同种植体对于下颌骨的应力分布有较大差异,拟自然牙双牙根种植体在颌骨的应力分布明显小于单牙根种植体。结论:对于磨牙区的种植修复,拟自然牙双牙根的种植体在力学性能上比现有的单牙根种植体更具有优势。

Objective: This paper determine geometric parameters of double-roots analogue implant on basis of statistical analysis of natural teeth. And compare the advantage of double-roots analogue implant and single-root implant in mandible model by using finite element analysis to find the difference of their stress distribution. Method: Use SPSS to analyze natural morals, determine geometric parameters of double-roots analogue implant. Simulate the occlusal force loading in the finite element software to an-alyze stress distribution of two different implants in mandible. Results: The stress distribution of the two different implants in the mandible are quite different. The stress of bone and double-roots analogue implant is significantly less than single-root implant. Conclusion:Compared to the single-root implant, double-roots analogue implant is far more superior for restoration in molar region.

目的：比较磨牙区即刻种植和延迟种植两种方式种植义齿的成功率。方法：198例磨牙区行种植修复的病例中，在控制适应证和患者同意的情况下，即刻种植共植入种植体67枚，延迟种植共植入种植体131枚。种植术后随访2年，观察种植体的稳定性，对两种不同种植方式的种植体的成功率进行比较。结果：67枚行即刻种植的种植体中，有4枚出现松动，成功率为94.0%；131枚行延迟种植的种植体中，有6枚出现松动，成功率为95.4%。两组种植方式成功率的比较，差异无统计学意义(P>0.05)。结论：在严格控制适应证的情况下，即刻种植也可获得较高成功率。

Objective: To evaluate the success rate between immediate and late implant placement methods in molar area implant. Methods: Under strickly indication control, molar area implant prosthesis was proceeded in 198 patients with permission. Immediate implant placement was applied in 67 patients and late implant placement was applied in 131 pa-tients. Patients were followed up for 2 years after implant installation. The implant success rate and stability between the two groups was compared. Results: Gomphiasis was arised in 4 patients who were received immediate implant placement. The success rate was 94.0%. The same situation was found in 6 patients received late implant placement. The success rate was 95.4%. No significant difference was found between these two methods (P>0.05). Conclusion: Immediate implant placement could obtain high success rate in strickly indication control patients.