Comparison of the failure load between conventional PMMA and milled PMMA full arch maxillary interim prosthesis fixed on 4 implants: an In Vitro Study

Authors

Tatiana Bou Sakr, Saint-Joseph University, Beirut, LebanonFollow
Hani TohmeFollow
Natalia Bou SakrFollow
Victor GhoubrilFollow
Carole Abi Ghosn YaredFollow

Abstract

The principal objective of this study was to compare the failure load between the conventional heat polymerized PMMA and the CAD/CAM milled PMMA interim full arch implant prostheses. The secondary aim was to evaluate the success of the distal extension of the temporary PMMA prosthesis.

A metallic edentulous upper arch model with 4 Straumann screw-retained abutment digital analogs was used to create 15 specimens for each of the 2 groups: Conventional and milled. Failure load was measured on 5 different regions on the left and right side of each specimen with the YLE universal testing machine:

Anterior, premolar, and molar. The maximum force supported before breaking was noted for each region (N). The medians of failure load were statistically analyzed. Significant differences were observed between the 2 groups and among each region in the 2 groups. The posterior cantilever was the weakest sector in both groups followed by the anterior then the premolar regions.

The interim milled PMMA prosthesis are a better choice due to their improved mechanical stability.

Recommended Citation

Bou Sakr, Tatiana; Tohme, Hani; Bou Sakr, Natalia; Ghoubril, Victor; and Abi Ghosn Yared, Carole (2024) "Comparison of the failure load between conventional PMMA and milled PMMA full arch maxillary interim prosthesis fixed on 4 implants: an In Vitro Study," International Arab Journal of Dentistry: Vol. 15: Iss. 1, Article 16.
Available at: https://digitalcommons.aaru.edu.jo/iajd/vol15/iss1/16