Machtei Eli E, Mahler Dan, Oettinger-Barak Orit, Zuabi Otman, Horwitz Jacob
Unit of Periodontology, Department of Oral and Dental Medicine, Rambam Health Care Campus, Haifa, Israel.
Clin Oral Implants Res. 2008 Mar;19(3):259-64. doi: 10.1111/j.1600-0501.2007.01466.x. Epub 2008 Jan 3.
The purpose of the present study was to evaluate the survival rate of dental implants in previously failed implant sites. In addition, factors that might affect the outcome of these redo procedures were also explored.
Patients that had failed dental implants, which were replaced with the same implant type at the same site, were included. Data on the failed implants were collected. The same parameters, along with the interval between retrieval and re-implantation, were collected for the second set of implants. Descriptive statistics were used to describe the patients and implants. Life table analysis of these implants was tabulated for both implant sets. The effect of systemic, environmental and local factors on the survival of the redo dental implants was evaluated.
Fifty-six patients with a total of 79 redo implants were included in this study. Implants were followed for 7-78 months (mean 29.9+/-2). Thirteen implants failed that resulted in an overall survival rate of 83.5%. Successful implants had greater diameter (4.05+/-0.52 mm) than failed implants (3.72+/-0.56 mm); however, these differences were only marginal (P=0.06). Conversely, smoking habits, implants length and location, mode of placement and spontaneous exposure did not have a significant effect on the outcome of this procedure.
Redo of dental implants has a lesser survival rate compared with previous reports for implants in pristine sites. These results were not associated with most implant- and/or patient-related factors. Thus, a possible negative effect that is associated with the specific implant's site might account for this phenomenon.
本研究旨在评估在先前种植失败部位进行牙种植体的存活率。此外，还探讨了可能影响这些再次种植手术结果的因素。
纳入牙种植体失败且在同一部位用相同类型种植体替换的患者。收集失败种植体的数据。为第二组种植体收集相同参数以及取出与重新植入之间的间隔时间。使用描述性统计来描述患者和种植体。对两组种植体进行生命表分析。评估全身、环境和局部因素对再次牙种植体存活的影响。
本研究纳入了56例患者，共79颗再次种植体。种植体随访7 - 78个月（平均29.9±2个月）。13颗种植体失败，总体存活率为83.5%。成功的种植体直径（4.05±0.52毫米）大于失败的种植体（3.72±0.56毫米）；然而，这些差异仅为边缘性差异（P = 0.06）。相反，吸烟习惯、种植体长度和位置、植入方式和自发暴露对该手术结果没有显著影响。
与先前关于原始部位种植体的报道相比，再次牙种植的存活率较低。这些结果与大多数种植体和/或患者相关因素无关。因此，与特定种植体部位相关的可能负面影响可能解释了这一现象。
