Stress distribution of rigid fixed bridge in abutments with mandibular 56 deletion A three-dimensional finite element analysis
10.3969/j.issn.1673-8225.2009.17.035
- VernacularTitle:下颌56缺失后双端单基牙固定桥应力分布的三维有限元分析
- Author:
Qiao WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2009;13(17):3361-3364
- CountryChina
- Language:Chinese
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Abstract:
Mandibular teeth and sustentacular tissues extracted from a healthy adult were treated using CT scanning to obtain two-dimensional image, and then a three-dimensional image was established using computer reconstruction technique. Simultaneously, a three-dimensional finite element model of rigid fixed bridge was established in abutments with mandibular 56 deletion. A fixing load of 100 N was vertically and horizontally loaded on the middle site of bridge, and the abutments were grouped according to the proportion of alveolar bone absorption of 5% sub-interval to analyze the effects of 0 50% alveolar bone absorption on stress distribution of rigid fixed bridge. When the alveolar bone absorption was zero or less than 10%, the stress of rigid fixed bridge was evenly distributed on abutments with the vertical load of 4 7 MPa and horizontal load of 6 9 MPa; when the alveolar bone absorption was greater than 10%, the stress of rigid fixed bridge was concentrated on the abutments with the vertical load of 9-16 MPa and horizontal load of 14-23 MPa. This suggested hthat alveolar bone absorption had great effect on stress distribution of rigid fixed bridge in abutments with mandibular 56 deletion, namely a little absorption would cause the changes of stress distribution.
