Int J Comput Dent. 2020;23(4):325-333.
The goal of this case series was to evaluate the clinical outcome at the 2-year follow-up of immediately loaded combined screw- and conometric-retained implant-supported full-arch restorations virtually planned using digital scanning technology.
This series included 12 patients presenting hopeless teeth in the maxilla treated with computer-guided flapless implant placement. A total of 72 implants were inserted. All implants were immediately loaded with a complete-arch restoration supported by an intraorally welded framework. Digital scanning technology was used to virtually plan a combined screw and conometric retention of the frameworks. Clinical parameters were assessed at 1 week and at 1, 3, 6, 12, and 24 months follow-up.
The survival rate after 2 years was 98.6%, as one implant failed during the osseointegration period. No major prosthetic complications were observed such as issues with mobility, unscrewed abutments, disconnected conometric copings, and prosthetic fracture. Only one patient registered the chipping of a prosthesis.
Based on the results of the present study, the use of combined screw and conometric retention for fixed immediate restorations properly planned using digital scanning technology seems to be a viable treatment alternative to screw or conometric retention alone for immediately loaded rehabilitations.
本病例系列旨在评估使用数字化扫描技术虚拟设计、即刻负重、组合螺丝固位与锥度固位的种植体支持式全口修复体在 2 年随访时的临床效果。
本系列纳入了 12 名上颌存在无保留价值的牙齿的患者，这些患者接受了计算机引导的无瓣种植体植入术。共植入 72 枚种植体。所有种植体均即刻负重，采用口内焊接的整体基台支持全口修复体。使用数字化扫描技术虚拟设计组合螺丝固位与锥度固位的基台。在术后 1 周以及 1、3、6、12 和 24 个月时进行临床参数评估。
2 年后的存活率为 98.6%，有 1 枚种植体在骨整合期失败。未观察到任何主要的修复体并发症，如松动、螺丝松动、连接体断开、修复体折断等。只有 1 名患者报告了修复体的崩瓷。
根据本研究的结果，使用数字化扫描技术正确设计的组合螺丝固位与锥度固位的固定即刻修复体似乎是一种可行的治疗选择，可替代单独使用螺丝固位或锥度固位进行即刻负重修复。
