RENATA FREITAS VARANDA*; ALEXANDRE RODRIGUES FREIRE; FRANCISCO CARLOS GROPPO; FRANCISCO HAITER NETO; PAULO ROBERTO BOTACIN; ANA CLÁUDIA ROSSI; FELIPPE BEVILACQUA PRADO

PIRACICABA DENTAL SCHOOL - UNICAMP

renatafreitasvaranda@gmail.com

Aim: To evaluate the volume of bone structures of the temporomandibular joint in individuals with posterior dental loss. Methods: We used 150 TC cone-beam of adult individuals of both sexes. The distribution of CT scans by groups was determined by the individual dental situation regarding the presence / absence of posterior teeth. We used the Mimics v.17 software to segmented the bone structures of interest. In this software, we obtained the volume (in mm3) by voxel counting the bone components of the temporomandibular joint previously reconstructed three-dimensionally. The data were submitted to the Kruskal-Wallis test, considering a 5% significance level. Results: The articular eminence showed higher volume (P<0.05) in dentate and mandibular bilateral edentulous than in the other groups. The volume of the mandibular condyle of the mandibular unilateral edentulous was higher than all other groups (P<0.05). The mandibular fossa showed heterogeneous according to the groups. Conclusion(s): The absence of further unilateral mandibular teeth causes bone remodeling in the articular eminence and mandibular condyle. The volume of the articular eminence reduces when mandibular condyle increases in individuals with no mandibular posterior teeth unilaterally.

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