Three-dimensional Finite Element Analyses Of Ⅰ And Ⅲ Different Buccal-lingual Mandibular Bone Width Of Implant

Objective: To establish a series of three-dimension finite element model of I and IIIdifferent buccal-lingual width mandible with dental implant.To investigate the stress ofimplant-bone interface to evaluate the best mandible width.Methods: Two kinds of mandible(I and III) with different buccal-lingual width wereestablished. The width of mandible in mode1was1mm, mode2was1.5mm,mode3was2mm, mode4was2.5mm, mode5was3mm, mode6was3.5mm.The implant wereloaded with200Newton axially and60degree oblique, the stress distribution inimplant-bone interfacial were analyzed with three-dimension finite element analysismethod.Result: When the implant get vertical or oblique tooth resultant force load, implant andsurrounding bone tissue within the maximum equivalent stress distribution always appearon the neck of implant combined with cortical bone. Cancellous bone within themaximum equivalent stress were appeared to be slightly away from the implant-boneinterface to the root of implant, At the same time, the maximum equivalent stress valuewere far less than the area of cortical bone. Ⅰ class type of mandible bone’s maximumequivalent stress are falling with the increase of buccal tongue mandible bone widthincrease with200N Oblique60°and vertical loading conditions. The width need tohave2mm each side of mandible bone can significantly improve the bone interface stressconcentration trend. Oblique load condition of maximum equivalent stress value aregreater than the stresses induced under the vertical load. Ⅲ class type of mandible bonebuccal tongue width have more than1.5mm can make implant-bone interface and themaximum equivalent stress decreases obviously. Conclusion: Appropriate buccal tongue mandible bone width can significantly improvethe stress distribution of implant-bone interface, the best buccal tongue of mandibularbone width for implant should more than2mm. Regardless of the oblique load andvertical load, Ⅲ type of mandibular bone implant neck cortex maximum equivalentstress are greater than the Ⅰ class. Clinical planting design should try to avoid or reducethe emergence of the oblique load.