Bornstein Michael M, Halbritter Sandro, Harnisch Hendrik, Weber Hans-Peter, Buser Daniel
Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
Int J Oral Maxillofac Implants. 2008 Nov-Dec;23(6):1109-16.
This retrospective study analyzed the pool of patients referred for treatment with dental implants over a 3-year period in a referral specialty clinic.
All patients receiving dental implants between 2002 and 2004 in the Department of Oral Surgery and Stomatology, University of Bern, were included in this retrospective study. Patients were analyzed according to age, gender, indications for implant therapy, location of implants, and type and length of implants placed. A cumulative logistic regression analysis was performed to identify and analyze potential risk factors for complications or failures.
A total of 1,206 patients received 1,817 dental implants. The group comprised 573 men and 633 women with a mean age of 55.2 years. Almost 60% of patients were age 50 or older. The most frequent indication for implant therapy was single-tooth replacement in the maxilla (522 implants or 28.7%). A total of 726 implants (40%) were inserted in the esthetically demanding region of the anterior maxilla. For 939 implants (51.7%), additional bone-augmentation procedures were required. Of these, ridge augmentation with guided bone regeneration was performed more frequently than sinus grafting. Thirteen complications leading to early failures were recorded, resulting in an early failure rate of 0.7%. The regression analysis failed to identify statistically significant failure etiologies for the variables assessed.
From this study it can be concluded that patients referred to a specialty clinic for implant placement were more likely to be partially edentulous and over 50 years old. Single-tooth replacement was the most frequent indication (> 50%). Similarly, additional bone augmentation was indicated in more than 50% of cases. Adhering to strict patient selection criteria and a standardized surgical protocol, an early failure rate of 0.7% was experienced in this study population.
本回顾性研究分析了一家转诊专科诊所3年内转诊接受牙种植治疗的患者群体。
本回顾性研究纳入了2002年至2004年间在伯尔尼大学口腔外科和口腔医学系接受牙种植的所有患者。根据年龄、性别、种植治疗适应证、种植体位置以及所植入种植体的类型和长度对患者进行分析。进行累积逻辑回归分析以识别和分析并发症或失败的潜在风险因素。
共有1206例患者接受了1817颗牙种植体。该组包括573名男性和633名女性，平均年龄为55.2岁。近60%的患者年龄在50岁及以上。种植治疗最常见的适应证是上颌单颗牙缺失（522颗种植体，占28.7%）。共有726颗种植体（40%）植入上颌前部美学要求较高的区域。939颗种植体（51.7%）需要额外的骨增量手术。其中，引导骨再生进行牙槽嵴增量比窦底提升术更频繁。记录到13例导致早期失败的并发症，早期失败率为0.7%。回归分析未能确定所评估变量的具有统计学意义的失败病因。
从本研究可以得出结论，转诊至专科诊所进行种植体植入的患者更可能是部分牙列缺失且年龄超过50岁。单颗牙缺失是最常见的适应证（>50%）。同样，超过50%的病例需要额外的骨增量。在本研究人群中，遵循严格的患者选择标准和标准化手术方案，早期失败率为0.7%。
