Noelken Robert, Kunkel Martin, Jung Britta A, Wagner Wilfried
Private practice for Oral Surgery, Lindau/Lake Constance, Germany and research fellow, Department of Oral and Maxillofacial Surgery, University of Mainz, Germany Professor and head of clinic, Department of Oral and Maxillofacial Surgery, University Hospital of Bochum, Germany Consultant, Department of Orthodontics, University Hospital of Mainz, Germany Professor and head of clinic, Department of Oral and Maxillofacial Surgery, University Hospital of Mainz, Germany.
Clin Implant Dent Relat Res. 2014 Feb;16(1):21-31. doi: 10.1111/j.1708-8208.2012.00449.x. Epub 2012 Feb 29.
The concept of scalloped implants to maintain the natural contour of the alveolar ridge has been a source of controversy for many years.
This study examined the long-term clinical performance of the scalloped NobelPerfect implant in a one-stage procedure (immediate loading in the esthetic zone).
In 20 patients, immediate prosthetic restorations were placed on 31 NobelPerfect implants in a private practice and followed for up to 78 months. Twenty-one implants were placed immediately after extraction, seven implants were placed after osseous consolidation of the extraction sockets, and three implants were placed secondary to extended alveolar ridge augmentation procedures. All implants were provisionalized on the day of implant placement and adjusted to clear all contacts in centric occlusion and during eccentric movements. Outcome variables were success rates, marginal bone levels, and pink esthetic score (PES) assessed per implant.
One implant failed after 1.4 months. Five patients with six implants in total were scored in the 5-year follow-up as dropouts. Mean follow-up period of remaining 24 implants was 65 months (range, 55-78 months). Cumulative success rates according to the criteria specified by Smith and Zarb were 96.8%. Marginal bone levels averaged 1.1 mm above the first thread. Mean PES ratings were 10.5 (range, 3-13).
Survival rates, marginal bone levels, and esthetic results suggest proof of principle for the preservation of the interproximal bony lamella with a scalloped implant design in long-term data.
扇贝形种植体用于维持牙槽嵴自然轮廓的概念多年来一直存在争议。
本研究探讨了扇贝形诺贝尔完美种植体在一期手术（美学区即刻加载）中的长期临床性能。
在一家私人诊所中，为20例患者的31颗诺贝尔完美种植体即刻进行了修复，并随访长达78个月。21颗种植体在拔牙后即刻植入，7颗种植体在拔牙窝骨愈合后植入，3颗种植体在牙槽嵴扩展增高手术后二期植入。所有种植体在植入当天进行临时修复，并进行调整以清除正中咬合和非正中运动时的所有接触。观察指标为每个种植体的成功率、边缘骨水平和粉色美学评分（PES）。
1颗种植体在1.4个月后失败。在5年随访中，共有6颗种植体的5例患者被记为失访。其余24颗种植体的平均随访期为65个月（范围55 - 78个月）。根据史密斯和扎布制定的标准，累积成功率为96.8%。边缘骨水平平均比第一螺纹高出1.1毫米。平均PES评分为10.5（范围3 - 13）。
长期数据显示，生存率、边缘骨水平和美学结果表明，扇贝形种植体设计保留邻间骨板的原则得到了验证。
