Abstract: Objective To compare the effects of composite resin and glass ionomer cements filling Methods on masticatory function in patients with posterior teeth defects.Methods A total of 72 patients with posterior teeth defects in our hospital from May 2017 to April 2018 were randomly divided into control group and observation group, with 36 cases in each group.The control group was treated by glass ionomer cements filling method, and the observation group was treated by composite resin filling method.The repair effect and masticatory function after posterior tooth defect filling were compared between the two groups.Results The total effective rate of the control group (75.00%) was lower than that of the observation group (94.44%) (P<0.05).Before treatment, there was no statistical difference in masticatory function between the two groups (P>0.05).After treatment for one year, the masticatory frequency of the control group was lower than that of the observation group (P<0.05); the adverse reaction rate of the observation group was lower than that of the control group (P<0.05).Conclusion Composite resin filling for posterior teeth defect has better effects than glass ionomer cements filling, as it can enhance masticatory function and is easy to operate with less adeverse reactions; therefore, it is worthy of clinical application.

Key words: Posterior teeth defects, composite resin, glass-ionomer cement, masticatory function