The influence of titanium‐base abutment geometry and height on mechanical stability of implant‐supported single crowns

• Published in: Clinical oral implants research 2024-08, Vol.35 (8), p.1033-1041
• Main Authors: Karasan, Duygu, Pitta, João, Zarauz, Cristina, Strasding, Malin, Liu, Xinran, Fehmer, Vincent, Sailer, Irena
• Format: Article
• Language: English
• Subjects: Aging; Ceramics - chemistry; Crowns; Dental Abutments; Dental Implant-Abutment Design; dental implants; Dental Implants, Single-Tooth; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Dental Stress Analysis; fracture load; Fracture strength; Fracture toughness; Humans; hybrid ceramic; implant abutments; Materials Testing; Mechanical properties; PICN; Polymers; polymer‐infiltrated‐ceramic‐matrix; Prostheses; Stability; Titanium; Titanium - chemistry; Variance analysis
• ISSN: 0905-7161; 1600-0501; 1600-0501
• DOI: 10.1111/clr.14207

Aim This study aimed to investigate the influence of titanium base (ti‐base) abutment macro‐ and micro‐geometry on the mechanical stability of polymer‐infiltrated ceramic network (PICN) screw‐retained implant‐supported single crowns (iSCs). Materials and Methods Twelve specimens per group were used, comprising six different implant/ti‐base abutment combinations restored with PICN iSCs: Nb‐T (gingival height [GH]: 1.5 mm, prosthetic height [PH]: 4.3 mm), CC (GH: 0.8 mm, PH: 4.3 mm), CC‐P (GH: 0.8 mm, PH: 7 mm), Nb‐V (GH: 1.5 mm, PH: 6 mm), St (GH: 1.5 mm, PH: 5.5 mm), and Th (GH: 0.5 mm, PH: 9 mm). The specimens underwent thermo‐mechanical aging, and those that survived were subsequently subjected to static loading until failure. The data were analyzed using a one‐way ANOVA test followed by Tukey post hoc test (α = .05). Results All specimens survived thermo‐mechanical aging without complications, namely, visible cracks, debonding, or screw loosening. Th group demonstrated the highest strength values among all the groups, with significant differences compared to Nb‐T (p