Department of Adult Comprehensive Dentistry, IDIBELL Institute, School of Dentistry, University of Barcelona, Barcelona, Spain.
Int J Oral Maxillofac Implants. 2010 May-Jun;25(3):613-9.
To assess the long-term behavior of 980 implants placed in a private practice and evaluate the influence of periodontitis history and smoking habit on implant survival rates.
A retrospective review of clinical records of consecutively treated patients with Astra Tech implants was conducted. This review included all patients treated between February 1994 and January 2005. Clinical histories were reviewed, and data were gathered on clinical and radiographic examinations. A record was kept on smoking habits, periodontitis history, length and diameter of implant(s), and whether the sinus was elevated. Cumulative survival proportions analysis was performed, and Cox regression multivariate analysis modified for correlated dependent observations was also used, with the implant as the unit of analysis.
A total of 323 patients (185 [57.3%] female; mean age, 55.4 +/- 15.2 years) received 980 implants. Of the implants evaluated in this study, 71.1% were placed in patients who were undergoing periodontal maintenance care and 38.8% were placed in smokers. The cumulative survival rate was 96.2% at 5 years; 4.3% of implants failed; 57.1% of failures occurred before implant loading. Tobacco use and periodontitis did not affect the risk of failure, and their interaction did not show significance (P = .386). Implants from individuals with many implants and those placed in patients with sinus elevation showed a higher risk of failure (P < .05). Regression analysis showed no significant interaction between periodontitis history, tobacco use, and implant failure.
Implant placement is an effective and reliable long-term treatment, even in periodontal patients under maintenance care and with a smoking habit. Combined analysis of tobacco use and history of periodontitis showed no significant interaction with implant failure in this sample.
评估在私人诊所中放置的 980 个种植体的长期行为，并评估牙周病史和吸烟习惯对种植体存活率的影响。
对连续治疗的 Astra Tech 种植体患者的临床记录进行回顾性研究。本研究包括 1994 年 2 月至 2005 年 1 月间治疗的所有患者。对临床病史进行了回顾，并收集了临床和影像学检查的数据。记录了吸烟习惯、牙周病史、种植体的长度和直径，以及是否提升窦腔。进行了累积存活率比例分析，并使用 Cox 回归多变量分析（针对相关的相依观测值进行修正），以种植体为分析单位。
共有 323 名患者（185 名女性[57.3%]；平均年龄 55.4 ± 15.2 岁）接受了 980 个种植体。在本研究评估的种植体中，71.1%的种植体用于正在接受牙周维护治疗的患者，38.8%的种植体用于吸烟者。5 年时的累积存活率为 96.2%；4.3%的种植体失败；57.1%的失败发生在种植体加载之前。吸烟和牙周病并不影响失败的风险，两者之间也没有交互作用（P =.386）。植入物数量多的患者和鼻窦升高的患者的植入物失败风险更高（P <.05）。回归分析显示，牙周病史、吸烟与种植体失败之间没有显著的交互作用。
种植体的放置是一种有效的、可靠的长期治疗方法，即使是在接受牙周维护治疗且有吸烟习惯的患者中也是如此。对吸烟和牙周病史的综合分析表明，在本样本中，与种植体失败没有显著的相互作用。
