Lenz Ulysses, Dos Santos Renan Brandenburg, Satpathy Megha, Griggs Jason A, Della Bona Alvaro
Postgraduate Program in Dentistry, School of Dentistry, University of Passo Fundo, Passo Fundo 99052-900, RS, Brazil.
Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA.
Materials (Basel). 2025 Jul 21;18(14):3420. doi: 10.3390/ma18143420.
The design of custom abutments (CA) can affect the mechanical reliability of implant-supported restorations. The purpose of the study was to evaluate the influence of design parameters on the fatigue limit of CA and to compare optimized custom designs with the reference abutment (RA). A morse-tapered dental implant, an anatomical abutment, and a connector screw were digitalized using microcomputed tomography. A cone beam computed tomography scan was obtained from one of the authors to virtually place the implant-abutment assembly in the upper central incisor. Ten design parameters were selected according to the structural geometry of the RA and the implant planning. A reverse-engineered RA model was created in SOLIDWORKS and was modified considering a Taguchi orthogonal array to generate 36 CAs with ±20% dimensional variations. Finite element analysis was conducted in ABAQUS, and fatigue limits were estimated using Fe-safe. ANOVA (α = 0.1) identified the most influential parameters. Von Mises stress values ranged from 229 MPa to 302 MPa, and 94.4% of the CAs had a higher fatigue limit than the RA. Three parameters significantly affected the fatigue performance of the implant system. The design process of custom abutments includes critical design parameters that can be optimized for longer lifetimes of implant-abutment restorations.
定制基台（CA）的设计会影响种植体支持修复体的机械可靠性。本研究的目的是评估设计参数对CA疲劳极限的影响，并将优化后的定制设计与参考基台（RA）进行比较。使用微型计算机断层扫描对莫氏锥度牙种植体、解剖学基台和连接螺钉进行数字化处理。从作者之一处获得锥形束计算机断层扫描，以便在虚拟环境中将种植体-基台组件放置在上颌中切牙中。根据RA的结构几何形状和种植体规划选择了10个设计参数。在SOLIDWORKS中创建了逆向工程的RA模型，并考虑田口正交阵列进行修改，以生成36个尺寸变化±20%的CA。在ABAQUS中进行有限元分析，并使用Fe-safe估计疲劳极限。方差分析（α = 0.1）确定了最具影响力的参数。冯·米塞斯应力值范围为229 MPa至302 MPa，94.4%的CA的疲劳极限高于RA。三个参数对种植体系统的疲劳性能有显著影响。定制基台的设计过程包括关键设计参数，这些参数可进行优化以延长种植体-基台修复体的使用寿命。
