Objective:　The　objective　was　to　evaluate　the　effect　of　frictional　forces　on　the　canine＇s　translation　and　rotation　in　transparent　tooth　correction　treatment.　Materials　and　Methods:　Based　on　computed　tomography　(CT)　images　of　the　teeth　and　their　supporting　tissues,　solid　models　were　used　to　build　finite-element　models.　One　canine　was　simulated　translation　and　rotation　in　the　buccolingual　direction　by　aligners　with　different　friction　coefficients.　Results:　The　change　of　the　canine＇s　rotation　centers　and　periodontal　ligament　(PDL)　stress　with　an　increase　of　the　friction　coefficient　in　the　two　movement　types　were　obtained.　Conclusions:　Friction　coefficient　has　little　effect　on　the　canine＇s　translation　movement.　While　in　rotation　cases,　the　small　friction　coefficient　seems　to　be　helpful　to　gain　the　body　movement　type.　©　2015　World　Scientific　Publishing　Company.