Three-dimensional finite element analysis of the stress distribution pattern in the design modifications of U-shaped palatal major connector.
Article
in English
| IMSEAR
| ID: sea-139915
ABSTRACT
Background:
The U-shaped maxillary major connector is considered to be the least-desirable design by many prosthodontists as it lacks rigidity, which is a primary requisite for a major connector. Aims andObjectives:
Design modifications in the U-shaped palatal major connector are desired because it lacks rigidity. The study also aimed to determine the best design when a U-shaped palatal major connector is indicated for clinical use. Materials andMethods:
The normal design and the design-modified models (modification 1, 2, 3, 4) were loaded at the functional cusps of the premolars and the molars with a magnitude of 200 N, 250 N and 300 N at angulations of 60 o and 90 o on both sides of the maxillary arch. Results for each loading were obtained as stress distribution colored images and numerical values were recorded. A three-dimensional finite element analysis study of the design-modified models was performed using two finite element softwares, namely PRO-E and IDEAS.Results:
The least stress value of 7.86 Megapascals (MPa) at 200 N, 60 o was recorded for the double-thickness design, followed by design 1, which was 8.03 MPa. The least stress value for the palatal mucosa and ligament was provided by design modification 1 (0.5 mm-thick U-shaped connector, 9 mm anteroposteiorly, 14.6 mm laterally), which was 9.78 MPa and 2.98 MPa, respectively.Conclusion:
The double-thickness group exhibited the least internal stress for the U-shaped major connector. However, it delivered the greatest stress to the palatal mucosa and the periodontal ligaments.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Palate
/
Periodontal Ligament
/
Stress, Mechanical
/
Bicuspid
/
Biomechanical Phenomena
/
Materials Testing
/
Humans
/
Chromium Alloys
/
Denture Design
/
Pliability
Language:
English
Year:
2010
Type:
Article
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