目的:报告通过倾斜立体光刻(TSLA)制造的固定短跨度(单冠[SC]和固定部分假体[FPPs])植入物支撑的混合复合修复体获得的临床结果。
方法:这项回顾性临床研究包括85例患者,这些患者已使用95种固定的短跨度植入物支撑混合复合材料(IrixMax®,DWSSystems)用TSLA制造的修复体(70个SC和25个FPP,最多三个单元)。全数字化无模型工作流程基于口腔内植入物扫描,使用TSLA(Dfab®,DWS系统)。主要结果是边际适应,咬合和邻间接触点的质量,以及修复体的色彩整合,由两名经验丰富的操作人员(修复医生和牙周病医生)独立评估。从1到5的分数(以5为最高值,4质量满意,3为可接受的质量,和2和1作为最低值,表达不满意的质量)由每个操作员在交付时分配给每个修复。次要结果是1年随访时修复体的存活和成功。修复被定义为在整个随访期间没有任何并发症的情况下成功。进行统计分析。
结果:对于边缘闭合以及咬合和邻间接触点的质量,3D打印的混合复合材料修复体得分很高;美学整合令人满意。安置一年后,所有修复都幸存下来,发病率低(总体为4.2%,5.7%SCs)的并发症(两个基台螺钉松动,修复的两个版本,和混合基台的一个上部由钛底座制成),成功率为95.8%。
结论:在本研究的范围内(回顾性设计,随访限于交付后1年,并且仅包括水泥修复体)通过TSLA制造的固定短跨度植入物支撑的混合复合牙冠和桥梁在临床上是精确的,1年时并发症发生率低。
■使用TSLA印刷技术可以为使用确定的植入物支撑的假体修复体治疗小的缺牙间隙开辟新的视角。
To report the clinical results obtained with fixed short-span (single crowns [SCs] and fixed partial prostheses [FPPs]) implant-supported hybrid composite restorations fabricated through tilting stereolithography (TSLA).
This retrospective clinical
study included 85 patients who had been restored with 95 fixed short-span implant-supported hybrid composite (Irix Max®, DWS Systems) restorations (70 SCs and 25 FPPs up to three units) fabricated with TSLA. The full-digital model-free workflow was based on intraoral implant scanning, computer-assisted design (CAD) and 3D printing using TSLA (Dfab®, DWS Systems). The primary outcomes were the marginal adaptation, the quality of the occlusal and interproximal contact points, and the chromatic integration of the restorations, assessed independently by two experienced operators (a prosthodontist and a periodontist). A score from 1 to 5 (with 5 as the highest value, 4 for satisfactory quality, 3 for acceptable quality, and 2 and 1 as the lowest values, expressing unsatisfactory quality) was assigned by each operator to each restoration at delivery. The secondary outcomes were the survival and success of the restorations at the 1-year follow-up. The restoration was defined as successful in the absence of any complications throughout the follow-up period. A statistical analysis was conducted.
For the quality of the marginal closure and occlusal and interproximal contact points, the 3D-printed hybrid composite restorations scored highly; the aesthetic integration was satisfactory. One year after placement, all restorations survived, with a low incidence (4.2 % overall, 5.7 % SCs) of complications (two abutment screw loosenings, two decementation of the restorations, and one upper portion of the hybrid abutment decemented from the titanium base), for a success rate of 95.8 %.
Within the limits of this
study (retrospective design, follow-up limited to 1 year from the delivery, and only cemented restorations included) fixed short-span implant-supported hybrid composite crowns and bridges fabricated through TSLA were clinically precise, presenting a low incidence of complications at 1 year.
The use of TSLA printing technology can open new perspectives for the treatment of small edentulous gaps with definitive implant-supported prosthetic restorations.