, Weinstrasse 4, 80333, Munich, Germany.
Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany.
Clin Oral Investig. 2017 Jul;21(6):1953-1959. doi: 10.1007/s00784-016-1982-1. Epub 2016 Oct 29.
The objective of this clinical study was to evaluate the clinical performance of implant-supported zirconia crowns with a sintered veneering cap. Furthermore, the influence of the type of retention (screw-retained vs cemented single crowns) was analysed.
Fifty-eight patients were accommodated with 114 implants, inserted in the molar and premolar regions. Zirconia-based crowns with a sintered veneering cap were either screw-retained (n = 53) or cemented (n = 61) on the implant. Recalls were performed every 6 months. The state of soft tissue was documented by the modified plaque and gingiva index (mPI) and sulcus bleeding index (mSBI). The restorations were evaluated for technical failures like veneering porcelain fractures, surface qualities and marginal fitting.
Neither implant loss nor crown fractures occurred. After a mean clinical service time of 36.9 months, fractures of the veneering porcelain were registered in 1.8 % of the cases. The Kaplan-Meier survival probability regarding eventless restorations was 98.2 %. Chipping of the veneering porcelain was registered in two cemented crowns without statistical influence of the type of retention. The indices showed healthy soft periimplant tissues in both groups.
Implant-supported zirconia crowns with a sintered veneering cap demonstrated good clinical performance. The type of retention had no influence on technical complications.
本临床研究的目的是评估带有烧结饰面瓷层的氧化锆种植体支持的全瓷冠的临床性能。此外，还分析了固位方式（螺丝固位与黏接固位单冠）的影响。
58 名患者共植入 114 颗种植体，分布于磨牙和前磨牙区。种植体上的氧化锆基底全瓷冠通过螺丝固位（n=53）或黏接固位（n=61）方式与种植体相连。每 6 个月进行一次随访。通过改良菌斑指数（mPI）和改良龈沟出血指数（mSBI）记录软组织状况。评估修复体的技术失败情况，如饰面瓷层破裂、表面质量和边缘适合性。
未发生种植体脱落或冠折。在平均 36.9 个月的临床随访后，有 1.8%的病例出现饰面瓷层破裂。无事件修复体的 Kaplan-Meier 生存概率为 98.2%。黏接固位的两例全瓷冠出现了饰面瓷崩瓷，但无统计学意义。两组的指数均显示种植体周围软组织健康。
带有烧结饰面瓷层的氧化锆种植体支持的全瓷冠具有良好的临床性能。固位方式对技术并发症无影响。
