Evaluation of Conventionally Constructed Co-Cr versus Milled PEEK Frameworks for Kennedy Class I Partial Dentures

Authors

1 Dentist at Ministry of Health, Cairo, Egypt

2 Lecturer at Removable Prosthodontic Department Faculty of Oral and Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt

3 Professor at Removable Prosthodontic Department Faculty of Oral and Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt

Abstract

Purpose: The study intended to evaluate the retention forces of conventional Co-Cr framework and CAD/CAM milled PEEK framework for removable partial dentures. Materials and methods: Ten mandibular Kennedy class I patients were chosen. All the patients had bilateral lower first premolars as anterior abutments. The patients were supplied with the conventional Co-Cr framework and CAD/CAM milled PEEK framework for removable partial dentures. The retention for both types of dentures was evaluated by the universal testing machine at the time of insertion, six months after insertion, and twelve months after insertion. Results: The forces of retention for the conventional (Co-Cr group) were significantly greater than that of the CAD/CAM milled (PEEK group) catching the same undercuts. Conclusions: A statistical significance was recorded in the force of retention between the CAD/CAM milled PEEK framework and Co-Cr framework in favor of Co-Cr. However, the force of retention for CAD/CAM milled PEEK framework for RPDs showed to be within the adequate limits required for retaining the removable partial dentures.

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