Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany.
Department of Prosthodontics, Center for Dentistry and Oral Medicine (Carolinum), Goethe-University Frankfurt am Main, Frankfurt am Main, Germany.
J Prosthodont. 2024 Jan;33(1):34-40. doi: 10.1111/jopr.13719. Epub 2023 Jun 10.
Hybrid abutment crowns (HACs) made from monolithic ceramics represent an efficient option for single restorations on implants. However, long-term data are scarce. The purpose of this clinical trial was to evaluate the survival and complication rates of CAD-CAM fabricated HACs over a time period of at least 3.5 years.
Twenty-five patients with a total of 40 HACs made of monolithic lithium disilicate ceramic bonded to a titanium base CAD-CAM abutment were retrospectively evaluated. All implants and screw-retained restorations were placed and manufactured in the same department of a university hospital. Only crowns that had been in service for more than 3.5 years were included in the study. HACs were evaluated regarding technical and biological complications. Functional Implant Prosthodontic Scores (FIPS) were obtained.
The mean observation time was 5.9 ± 1.4 years. Implant survival was 100%, and HAC survival was 97.5%. Over the observation period, one crown fracture was observed, necessitating refabricating of the restoration. Three minor biological complications were found. The overall mean FIPS score was 8.69 ± 1.12 points.
Within the limitations of this study, monolithic screw-retained HACs milled from lithium disilicate ceramics and bonded to titanium bases appeared to be a reliable treatment option over more than 3.5 years due to their low biological and technical complication rates.
由整体陶瓷制成的混合基台冠（HAC）是种植体单颗修复的有效选择。然而，长期数据有限。本临床试验的目的是评估 CAD-CAM 制作的 HAC 在至少 3.5 年的时间内的存活率和并发症发生率。
回顾性评估了 25 名患者的 40 个 HAC，这些 HAC 由整体锂硅玻璃陶瓷制成，结合在 CAD-CAM 钛基底台。所有种植体和螺丝固位修复体均由大学医院的同一科室进行植入和制作。本研究仅纳入使用时间超过 3.5 年的冠。评估 HAC 的技术和生物学并发症。获取功能性种植体修复体评分（FIPS）。
平均观察时间为 5.9 ± 1.4 年。种植体存活率为 100%，HAC 存活率为 97.5%。在观察期间，发现 1 例冠折，需要重新制作修复体。发现 3 例轻微的生物学并发症。总体平均 FIPS 评分为 8.69 ± 1.12 分。
在本研究的限制范围内，由锂硅玻璃陶瓷制成并结合钛基底的整体螺丝固位 HAC 显示出是一种可靠的治疗选择，超过 3.5 年的低生物学和技术并发症发生率。
