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

DOI

https://doi.org/10.70174/iajd.v15i1.969

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.
DOI: https://doi.org/10.70174/iajd.v15i1.969
Available at: https://digitalcommons.aaru.edu.jo/iajd/vol15/iss1/16