Gelb D A
University of Connecticut, School of Dental Medicine, Hartford.
Int J Oral Maxillofac Implants. 1993;8(4):388-99.
Since August 1989, 35 consecutive patients were treated with immediate implants to replace 50 teeth requiring extractions as a result of root fractures, endodontic instability, nonrestorable carious lesions, or periodontal disease. Defects relative to the implant were morphologically grouped and were treated for bone regeneration with demineralized freeze-dried crushed cancellous bone (DFDBA), e-PTFE membrane, or both. Thread exposure initially ranged from 4 to 20 threads, while implant lengths varied from 8.5 to 18 mm. The mean implant length was 15 mm, with mean thread exposure of 11.34 threads, or 54% of the threaded length of the implant. Reentry confirmed 100% thread coverage in all but one implant in the no-wall group treated with DFDBA alone. Histologic evaluation of three cases confirmed viability of the regenerated bone. The patients were followed through April 1993, with 49 implants (98%) remaining osseointegrated and functional, supporting the predictability of immediate implant placement. The age of the patients ranged from 16 to 80 years, hence implant placement considerations relative to adolescents are also discussed.
自1989年8月起，连续35例患者接受了即刻种植治疗，以替换因根折、牙髓不稳定、无法修复的龋损或牙周病而需要拔除的50颗牙齿。将种植体相关的骨缺损按形态进行分组，并用脱矿冻干碎松质骨（DFDBA）、e-PTFE膜或两者联合进行骨再生治疗。最初的螺纹暴露范围为4至20个螺纹，而种植体长8.5至18毫米不等。种植体平均长度为15毫米，平均螺纹暴露为11.34个螺纹，占种植体螺纹长度的54%。再次手术证实，在仅用DFDBA治疗的无壁组中，除一枚种植体外，其余种植体的螺纹均被100%覆盖。对3例病例的组织学评估证实了再生骨的活力。对患者随访至1993年4月，49枚种植体（98%）保持骨结合且功能良好，这支持了即刻种植的可预测性。患者年龄在16至80岁之间，因此还讨论了与青少年相关的种植体植入考量因素。
