Design of bilateral maxillary central incisor prosthesis after surgical crown lengthening
NIU Jian-jie
YANG Fan
Abstract：AIM:To investigate the effects of different prosthetic designs on the alveolar bone stress distri-bution and tooth moblilty of bilateral maxillary central incisors after surgical crown lengthening.METHODS:A three dimensional finite element model(3DFEM)of crowns with different alveolar bone height aroud the bilateral maxillary incisors was established by reverse modeling method.According to the design of prosthesis,the models was divided into 4 groups:single crown,2-unit combined crowns,3-unit combined crowns and 4-unit combined crowns.The alveolar bone stress distribution and terminal mobility with different crown design was analyzed using the 3DFEM.RESULTS:The maximum von Mises stress in the alveolar bone and the terminal mobility of the crown increased with the reduction of alveolar bone height.When the bone height reduced by less than 2 mm,all designs of restorations meet the require-ments of periodontal potential.While the bone height reduced by 3 mm,the stress produced by single crown design ex-ceeded the range of periodontal potential.CONCLUSION:When the bone height decreases less than 2 mm,both sin-gle crown and combined crowns can be used.When the bone height decreases greater than 3 mm,combined crowns should be used for bilateral maxillary incisors restoration after surgical crown lengthening.
Keywords：surgical crown lengtheningstress analysisdental restoration designfinite element analysis
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 577-580,610 )