Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.
J Periodontol. 2013 Nov;84(11):1517-27. doi: 10.1902/jop.2013.120635. Epub 2013 Jan 24.
Early implant placement with simultaneous contour augmentation is documented with short- and medium-term studies. The long-term stability of contour augmentation is uncertain.
In this prospective, cross-sectional study, 41 patients with an implant-borne single crown were examined twice, in 2006 and 2010. Clinical, radiologic, and esthetic parameters were assessed at both examinations. In addition, a cone beam computed tomographic (CBCT) image was obtained during the second examination to assess the dimensions of the facial bone wall.
All 41 implants demonstrated ankylotic stability without signs of peri-implant infection at both examinations. The clinical parameters remained stable over time. Satisfactory esthetic outcomes were noted, as assessed by the pink and white esthetic score (PES/WES) indices. Overall, the PES scores were slightly higher than the WES scores. None of the implants developed mucosal recession over time, as confirmed by values of the distance between implant shoulder and mucosal margin and cast measurements. The periapical radiographs yielded stable peri-implant bone levels, with a mean distance between implant shoulder and first visible bone-implant contact value of 2.18 mm. The CBCT analysis demonstrated a mean thickness of the facial bone wall ≈2.2 mm. In two implants (4.9%) no facial bone wall was detectable radiographically.
This prospective cross-sectional study demonstrates stable peri-implant hard and soft tissues for all 41 implants examined and satisfactory esthetic outcomes overall. The follow-up of 5 to 9 years confirmed again that the risk for mucosal recession is low with early implant placement. In addition, contour augmentation with guided bone regeneration was able to establish and maintain a facial bone wall in 95% of patients.
已有短期和中期研究证明了同期进行轮廓增强的早期种植体植入的可行性。但轮廓增强的长期稳定性尚不确定。
在这项前瞻性、横断面研究中，我们对 41 名接受种植体单冠修复的患者进行了两次检查，分别在 2006 年和 2010 年。两次检查均评估了临床、影像学和美学参数。此外，在第二次检查时还获得了锥形束 CT（CBCT）图像，以评估面骨壁的维度。
所有 41 个种植体在两次检查中均表现出骨结合稳定性，无种植体周围感染迹象。临床参数随时间保持稳定。通过粉色和白色美学评分（PES/WES）指数评估，获得了令人满意的美学效果。总体而言，PES 评分略高于 WES 评分。没有种植体随时间发生黏膜退缩，这一点得到了种植体肩与黏膜边缘之间的距离和模型测量值的证实。根尖片显示种植体周围骨水平稳定，种植体肩与首次可见骨-种植体接触之间的平均距离为 2.18mm。CBCT 分析显示面骨壁的平均厚度约为 2.2mm。在 2 个种植体（4.9%）中，影像学上无法检测到面骨壁。
这项前瞻性的横断面研究表明，所有 41 个受检种植体的种植体周围软硬组织均保持稳定，整体美学效果令人满意。5 至 9 年的随访再次证实，早期种植体植入发生黏膜退缩的风险较低。此外，引导骨再生的轮廓增强能够在 95%的患者中建立和维持面骨壁。
