Nelson Katja, Semper Wiebke, Hildebrand Detlef, Ozyuvaci Hakan
Department of Oral and Maxillofacial Surgery, Charité-Campus Virchow Clinic, Augustenburger Platz 1, 13353 Berlin, Germany.
Int J Oral Maxillofac Implants. 2008 Jul-Aug;23(4):726-32.
The aim of this study was to evaluate the success rate of 2 different implant systems with sandblasted and acid-etched modified surfaces loaded after reduced healing periods.
One-hundred seventeen patients with a mean observation period of 3.75 years (24 to 61 months) were included in this evaluation. Chart reviews of a standardized recall program were evaluated. All 532 placed implants showed an unloaded healing time of 6 weeks in the mandible and 12 weeks in the maxilla. At abutment placement a torque value of 35 Ncm was one of the primary variables, and the success of the implants over time was determined by the criteria of Buser et al. The survival was analyzed using Kaplan-Meier method, and the probability of an event within 1 group independent of time was evaluated using the chi-square test and Fisher exact test.
Of the 532 implants, 235 were placed in female and 297 in male patients; 448 implants were located in the maxilla and 84 in the mandible. Three implants were lost prior to abutment connection in 3 patients. Life table analyses show an overall success rate of 99.4% at 5 years, as no implants were lost after abutment connection. There was no significant association of the implant type (P = .185), gender (P = .99), or jaw (maxilla/mandible; P = .06) and the survival of the implants within this study.
Based on the data found in this investigation, it can be concluded that implants with sandblasted, acid-etched surfaces can be restored after a 6- to 12-week healing period with a high predictability of success.
本研究旨在评估两种具有喷砂和酸蚀改性表面的不同种植系统在缩短愈合期后加载时的成功率。
本评估纳入了117例患者，平均观察期为3.75年（24至61个月）。对标准化召回程序的病历进行了评估。所有532颗植入的种植体在下颌骨的无负载愈合时间为6周，在上颌骨为12周。在基台安置时，35 Ncm的扭矩值是主要变量之一，种植体随时间的成功情况由Buser等人的标准确定。使用Kaplan-Meier方法分析生存率，并使用卡方检验和Fisher精确检验评估一组内与时间无关的事件概率。
在532颗种植体中，235颗植入女性患者，297颗植入男性患者；448颗种植体位于上颌骨，84颗位于下颌骨。3例患者在基台连接前有3颗种植体丢失。生命表分析显示，5年时的总体成功率为99.4%，因为基台连接后没有种植体丢失。在本研究中，种植体类型（P = 0.185）、性别（P = 0.99）或颌骨（上颌骨/下颌骨；P = 0.06）与种植体的生存率之间没有显著关联。
根据本研究中的数据，可以得出结论，具有喷砂、酸蚀表面的种植体在6至12周的愈合期后可以进行修复，成功率具有较高的可预测性。
