Van der Zee E, Van Waas M, Broek M, Van der Mieden van Opmeer R
Oral Implantology Group, Department of Oral Function, Academic Centre for Dentistry Amsterdam (ACTA), Louwesweg 1, 1068 EA Amsterdam, The Netherlands.
Int J Prosthodont. 2000 Jul-Aug;13(4):316-20.
Over the last decade, oral implantology has become a major treatment modality to aid the restoration of reduced dentitions. The present study monitored and quantified changes within a 5-year interval (1989-1991 [denoted as 1990*] to 1995) in the provision of different types of implant-supported superstructures and characteristics of recipient patients at the Academic Centre for Dentistry Amsterdam (ACTA).
All patients who received oral implants in 1990* and in 1995 were selected, and their files (95 and 105, respectively) were consulted. Data of interest were retrieved retrospectively, compared, and statistically analyzed using Chi-squared tests.
A number of statistically significant differences was apparent between these 2 periods. By 1995 there was a threefold increase in both the number of patients and the number of implants placed per year. The patient group of < or = 40 years of age had significantly increased, from 7% to 23%. Also, in 1995 more maxillae were implanted than in 1990* (44% vs 26%). Whereas the majority of implanted patients was edentulous in 1990* (64%), the majority in 1995 was partially edentulous (60%). By 1995, the new technique of guided bone regeneration (GBR) using membranes was evidenced (no GBR in 1990* vs 33% of all patients in 1995 receiving some form of local GBR therapy). With respect to the type of superstructures, there was a strong increase in the number of single-tooth replacements (from 4% to 23%). In the edentulous group, the majority of superstructures in 1990 was fixed prostheses (64%), whereas in 1995 the majority was overdentures (71%).
Major changes in oral implantology treatments were noticed between the 1990* and 1995 periods at ACTA. There is a trend toward implanting younger patients for partial implant-supported reconstructions using more regenerative procedures and with a more equal distribution in the maxilla and mandible.
在过去十年中，口腔种植学已成为帮助修复牙列缺损的一种主要治疗方式。本研究监测并量化了5年时间间隔（1989 - 1991年[记为1990*]至1995年）内，阿姆斯特丹牙科学术中心（ACTA）不同类型种植体支持的上部结构的提供情况以及接受治疗患者的特征。
选取1990*年和1995年接受口腔种植的所有患者，并查阅他们的病历（分别为95份和105份）。回顾性检索感兴趣的数据，进行比较，并使用卡方检验进行统计分析。
这两个时期之间存在一些具有统计学意义的显著差异。到1995年，患者数量和每年植入的种植体数量均增加了两倍。年龄小于或等于40岁的患者组显著增加，从7%增至23%。此外，1995年植入上颌骨的病例比1990年更多（44%对26%）。1990年大多数接受种植的患者为无牙颌（64%），而1995年大多数为部分牙列缺损（60%）。到1995年，出现了使用膜的引导骨再生（GBR）新技术（1990*年无GBR，而1995年所有患者中有33%接受了某种形式的局部GBR治疗）。关于上部结构的类型，单颗牙修复的数量大幅增加（从4%增至23%）。在无牙颌组中，1990年大多数上部结构为固定修复体（64%），而1995年大多数为覆盖义齿（71%）。
在ACTA，1990*年至1995年期间口腔种植治疗发生了重大变化。存在一种趋势，即种植更年轻的患者，采用更多的再生程序进行部分种植体支持的重建，并且在上颌骨和下颌骨中的分布更加均衡。
