Effects of various loading positions on stress distribution in implantª²bone interface

    LAN Zeª²Dong, LIN Zhu

    1Department of Orthodontics, Guangdong Provincial Stomatological Hospital, Guangzhou 510280, China, 2Department of Orthodontics, College of Stomatology, Fourth Military Medical University, Xi¡¯an 710033, China

    ¡¾Abstract¡¿ AIM: To investigate the effects of various loading positions on stress distribution in implantª²bone interface. METHODS: Threeª²dimension finite element analysis method was used to analyze the stress distribution in implantª²bone interface. A force loading of 1.47 N was applied mesioª²distally on the implant and the heights of loading positions were 4 mm, 7 mm and 10 mm to the cervix of the implant, respectively. RESULTS: The values of Vonª²Mises stress on the implant cervix were 0.3400 MPa, 0.5330 MPa, and 0.7310 MPa, respectively, and the values of displacement were 0.117 ¦Ìm, 0.163 ¦Ìm and 0.210 ¦Ìm, respectively. CONCLUSION: Clinically, the height of loading position should be reduced as low as possible so as to reduce the stress concentration and peak value of stress in implantª²bone interface, to attain rational stress distribution and to decrease the displacement of bone interface. ......