ArticleBMC oral health2024
Effect of geometry on clasp retention force: a finite element analysis study.
Article in BMC oral health, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
2 citing papers in PubMed.
- Biomechanical effects of titanium alloy removable partial denture framework designs fabricated by selective laser melting in mandibular Kennedy class II partial edentulism: A finite element study.Journal of dental sciences · 2026Article
- Biomechanical considerations in RPD design: application and perspective of finite element method in distal extension removable partial denture rehabilitation.Frontiers in dental medicine · 2025Review
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
purposeThe retention force of a realistic clasp is influenced by multiple, interrelated factors, which complicates the identification of the fundamental relationship between clasp geometry and retention force. While realistic clasps exhibit various shapes, they share basic geometric elements such as length, diameter, and curvature. Simpler geometries are often more conducive to identifying the underlying issues. The aim is to investigate the relationship between clasp geometry and retention force using finite element analysis.
methodsA three-dimensional clasp model was created in ANSYS 19.0 (ANSYS, USA). Two types of models were analyzed: rod-shaped clasps with varying lengths (1-15 mm) and diameters (0.6-1.6 mm), and bending clasps with different base widths (6-12 mm) and heights (0.5-5 mm), all made from cobalt-chromium alloys. For the rod models, stress and retention force were assessed by applying displacement loads and analyzing data with nonlinear regression. For the bending models, a similar analysis was conducted for varying base widths and heights.
resultsMaximum stress consistently concentrated at the clasp base. In rod models, retention force decreased with the third power of length and increased with the fourth power of diameter. For bent specimens, the retention force was approximately inversely proportional to the cube of the base width and inversely proportional to the first power of the height.
conclusionsFinite element analysis revealed distinct functional relationships between clasp geometry and retention force. Further laboratory validation is required.
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