Abstract: To check the morphological changes of the masseter muscle after surgical extraction of inferior molar teeth. 24 Wistar rats had samples of their masseter muscles analysed in the Optical Microscope (OM). The rats were randomly divided into three groups as follows: GI-15, GII-30, GII-60 days...

Abstract: To check the morphological changes of the masseter muscle after surgical extraction of inferior molar teeth. 24 Wistar rats had samples of their masseter muscles analysed in the Optical Microscope (OM). The rats were randomly divided into three groups as follows: GI-15, GII-30, GII-60 days after surgical extraction of inferior molar teeth. Each group had 5 experimental and 3 normal control rats for OM observation. The OM allowed the morphometric study of the masseter muscle. The morphometric study was based on the measurement of the fiber's area by AXION-VISION software. ANOVA test was applied for data analysis. No alteration was detected in all morphometric analysis of the masseter muscle. The masseter muscle adapts to the occlusal modiication caused by the extraction of the molar teeth during the analysed periods

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