Efficiency and geometric fidelity of library-selected anatomical prefabricated abutments and stock abutments relative to custom CAD-CAM abutments in posterior implant restorations
10.4047/jap.2025.17.6.392
- Author:
Jihoon SHIN
1
;
Minji SUN
;
Jee-Hwan KIM
;
Jaeyoung KIM
Author Information
1. Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
- From:The Journal of Advanced Prosthodontics
2025;17(6):392-405
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE:. This study evaluated the clinical efficiency and geometric fidelity of the library-selected anatomical prefabricated abutments (LAPA) compared with custom abutments (CA) and stock abutments (SA) by using a novel sectorbased deviation analysis (SBDA) method.
MATERIALS AND METHODS:. Two posterior single-implant cases, the mandibular left first molar and right second premolar, were selected for in vitro analysis. Twenty-four dental professionals (15 prosthodontic residents and 9 board-certified prosthodontists) performed three tasks: CA design, LAPA selection, and SA selection. The recorded time required for CA design and LAPA selection was compared. Overall geometric conformity was assessed using in-tolerance analysis (± 0.50 mm, ± 0.70 mm), and marginlevel fidelity was evaluated by sector-based and vector-based deviation analyses.The Wilcoxon signed-rank test was used to evaluate the clinical efficiency and geometric fidelity at a significance level of α = 0.05.
RESULTS:. LAPA required significantly less design time than the custom abutment (CA) (P < .001). Both LAPA and SA showed high overall conformity to CA within clinically acceptable limits. Sector- and vector-based analyses demonstrated that LAPA more closely replicated CA margin positions than SA, indicating superior morphological consistency with greater time efficiency.
CONCLUSION:. Within the limitations of this in vitro study, the library-selected anatomical prefabricated abutment showed a balanced performance between clinical efficiency and morphological fidelity.
