Anterior maxillary segmental distraction osteogenesis in cleft lip and palate: a three-dimensional finite element analysis

Abstract

Abstract: PURPOSE: To investigate the biomechanic properties of anterior maxillary segmental distraction osteogenesis in craniofacial complex with cleft lip and palate undergoing alveolar bone graft resorption. METHODS: Three-dimensional finite element models simulating anterior maxillary segmental osteotomy and graft resorption were constructed. Displacement pattern of surface landmarks and stress distribution over circum-maxillary sutures were analyzed after 6 mm and 0.5 mm of displacement was loaded on bilateral first premolars, respectively. RESULTS: The model with intact graft exhibited the most favorable outcome regarding to symmetry of sagittal displacement, suture stress distribution and counter-clockwise rotation of anterior segment, stability of arch in transversal dimension, elimination of step across graft site and reduction of stress concentration at graft. As the level of resorption lowered and remaining graft volume diminished, asymmetry of displacement, expansion of arch and step across graft site became more obvious. CONCLUSIONS: The more orally graft resorption occurred and the more graft resorbed, the less desirable the result of anterior maxillary segmental distraction osteogenesis would be.

Key words: Cleft lip and palate, Maxillary hypoplasia, Anterior maxillary segmental distraction osteogenesis, Alveolar bone graft, Finite element method

CLC Number:

R782.2

WANG Si-han, QIAN Yu-fen, HUA Cheng, LU Ming-fei. Anterior maxillary segmental distraction osteogenesis in cleft lip and palate: a three-dimensional finite element analysis[J]. China Journal of Oral and Maxillofacial Surgery, 2016, 14(4): 315-323.

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