FEM analysis of mandibular first molar restoration supported with different diameters and numbers of implants

Objective To study the influence on stress distribution at implant-bone interface of mandibular first molar implant-supported with different diameters and numbers of implants.Methods Four models of mandibular first molar of single or double implant-supported with different diameters were constructed with three-dimensional finite element method.The stresses at implant-bone interface were analysed in these models.Results The stresses in model D were slightly less when compared with model A,B and C.In the meantime,the value of stress was lower with increasing diameter implants.However,the differences of these values were not statistically significant.Conclusion The design of wider diameter and double-supported implants seems favorable to stress distribution and can benefit the retention and support of implants.