Jebreen Sami E, Khraisat Ameen
Dental Department, King Hussein Medical Center, Royal Medical Services, Amman, Jordan.
Clin Implant Dent Relat Res. 2007 Jun;9(2):89-93. doi: 10.1111/j.1708-8208.2007.00053.x.
The aim of this multicenter study was to evaluate success and restorative problems of ITI (ITI Dental Implant System, Straumann AG, Basel, Switzerland) implant-supported posterior partial prostheses in Jordan.
One-hundred forty-one ITI implants were placed in the posterior region of the mandible or the maxilla in 66 patients at multiple clinical practices in Jordan. The age of the patients ranged from 17 to 85 years. The implants were retrospectively analyzed from the first date of placement in September 1999 until May 2006. Eighty-three implants (58.87%) were placed in the mandible, and 58 (41.13%) in the maxilla. The implants were loaded with either cement-retained single- or multiple-tooth replacements.
Three maxillary implants of two male patients have been lost (2.13% of the total and 5.12% of the maxillary implants). Failed implants were of wide-neck type with 6-mm lengths. Moreover, in another two male patients, two single implants at the maxillary premolar region exhibited significant bone loss from the buccal side of the implant surface (2-mm bone resorption). Those two implants are still functioning and were included in calculating the survival rate but not the success rate. Therefore, the cumulative survival rate for both arches and genders was 97.87% and that for male patients in the maxillary region was 94.88%. The cumulative success rate for both arches and genders was 96.45% and that for the maxillary region was 86.21%. The corresponding rates concerning implants in female patients and the posterior mandible of both genders were 100% for both survival and success rates. Only one crown (mandibular) and another two abutment bridge (maxillary) were decemented in different patients (2.13%).
The survival and success rates of implants placed in male patients and in the maxilla were lower than that of implants placed in female patients and in the mandible. Cement-retained restorations showed minimal complications.
这项多中心研究的目的是评估瑞士巴塞尔士卓曼集团的ITI（ITI牙科种植系统）种植体支持的后牙局部修复体在约旦的成功率和修复问题。
在约旦的多个临床机构中，为66例患者在下颌或上颌后部区域植入了141颗ITI种植体。患者年龄在17至85岁之间。对这些种植体从1999年9月首次植入至2006年5月进行回顾性分析。83颗种植体（58.87%）植入下颌，58颗（41.13%）植入上颌。种植体用于粘结固位的单颗或多颗牙齿修复。
两名男性患者的三颗上颌种植体已丢失（占总数的2.13%，占上颌种植体的5.12%）。失败的种植体为宽颈型，长度为6毫米。此外，在另外两名男性患者中，上颌前磨牙区的两颗单颗种植体在种植体表面颊侧出现明显骨吸收（2毫米骨吸收）。这两颗种植体仍在发挥功能，计算生存率时将其纳入，但计算成功率时未纳入。因此，上下颌及所有性别的累计生存率为97.87%，上颌男性患者的累计生存率为94.88%。上下颌及所有性别的累计成功率为96.45%，上颌区域的累计成功率为86.21%。女性患者以及上下颌后部种植体的生存率和成功率均为100%。不同患者中仅1个冠（下颌）和另外2个基台桥（上颌）出现粘结剂松动（2.13%）。
男性患者和上颌种植体的生存率和成功率低于女性患者和下颌种植体。粘结固位修复体的并发症最少。
