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[Analysis of movement in partial prostheses and abutment teeth with differences in retainer]
Kanagawa Shigaku. the Journal of the Kanagawa Odontological Society
|March 1, 1989
Summary
This study compared the dynamic behavior of three dental prostheses (fixed bridge, telescopic denture, and Akers clasp denture) under simulated oral loads. The Akers clasp denture showed the most lateral movement, while stronger connections reduced abutment tooth root apex displacement.
Area of Science:
- Biomaterials Science
- Biomechanics
- Dental Prosthetics
Context:
- Designing dental prostheses requires understanding the complex dynamics of the stomatognathic system.
- Objective methods for connecting prostheses to abutment teeth and protecting the alveolar ridge are challenging due to unclear dynamic behaviors.
Purpose:
- To investigate and compare the dynamic characteristics of three different dental prosthesis designs: a fixed bridge, a telescopic denture (Konuskronen Telescope), and an Akers clasp denture.
- To analyze the modal resonant frequencies and movement patterns of these prostheses under dynamic loading conditions.
Summary:
- Modal analysis using a laser doppler vibrometer was performed on a stimulation model with artificial mucous and periodontal membranes subjected to controlled random noise.
- Results indicated that while modal resonant frequencies varied, the influence of abutment devices was limited. Lateral movement tendency increased from bridge to telescopic denture to Akers clasp.
- Abutment tooth root apex displacement decreased proportionally to the strength of the abutment device connection.
Impact:
- Provides objective data on the dynamic behavior of different dental prostheses, aiding in clinical design and selection.
- Highlights the trade-offs between prosthesis stability and abutment tooth movement, informing strategies for preserving periodontal health.
- Offers insights into optimizing prosthesis design for improved patient outcomes and longevity.