短种植体在骨量不足上颌后牙区的临床应用

目的　评估短种植体在较低牙槽骨高度上颌后牙区使用的临床效果，探讨其使用价值。 方法　2009—2011年，选取窦底骨高度为3～6 mm患者26例,共植入37枚短种植体，随访25～48个月（平均36个月），回顾其临床及影像资料，采用Buser 和Cochran存留标准评估短种植体存留率。 结果　37枚短种植体一例修复前失败，成功率97.3%。复查X线片种植体颈部边缘骨吸收均小于1.5 mm。结论　对于窦底骨高度严重受限的病例（3 mm≤高度≤6 mm），短种植体可以取得良好的且与常规长度种植体相同的稳定性。

Clincal application of short implant in the marginal bone loss posterior regions

Objectives To evaluate the clinical efficacy of short implant used in the marginal bone loss posterior regions and to discuss the use value of the short implant. Methods A retrospective study design was adopted. The clinical and radiographic data of 37 short implants in 26 patients (3mm≤bone height≤6mm) from 2009 to 2011 were collected after 25 to 48(mean 36) months’ follow-up to estimate the clinical result. The survival rate was evaluated according to Buser and Cochran’S survival criteria. Results The overall cumulative survival rate was found to be 97.3% and 1case early failure before restoration in the maxillary molar region was observed. The mean loss in margin bone height was less than 1.5 mm．Conclusions In the case of low alveolar ridge height of maxillary posterior region (3 mm≤H≤6 mm), survival rate of short implants over an average period of 36 months was favorable and comparable with longer implants.