Microscopic analysis in the temporomandibularjoint (TMJ) face to a direction change of mandibular power axis wich has the incidence upon cranial structure : experimental model in rabbits (Oryctolagus cuniculus l.)

Deise Ponzoni, Edela Puricelli

Abstract


The correlation between TMJ's growing, structure and function is consensual in the specialized literature. Until the moment, the little knowledge about post-birth changes are studied by observation of condylar growth and disc reestructuration. In an experimental model in rabbits (Oryctolagus cuniculus 1.), it was observed tecidual alterations of the TMJ's components — mandibular condyle, articular disc and temporal bone, face to a direction change of mandibular power axis, which has the incidence upon these structures. Twentyfour rabbit were divided in four groups. Two of each group formed a control group. Four experimental periods were established 15, 30, 60 and 90 days. The animals from the experimental group were submitted to surgical procedure involving the mandible right side, changing the direction of mandibular power axis, which has incidence in the TMJ. Histological observations of TMJ in the control group, at different times, the growth and development of this structure were showed, compatible to the normality. At experimental group, the change of mandibular power axis caused alteration of the mandibular condyle and the discal structure. Significative responses at temporal bone were observed too, as a process of osseous modelation, suggestive of growth of this cranial structure.

Keywords


Temporomandibular joint; mandibular power axis; Oryctolagus cuniculus



DOI: https://doi.org/10.22456/2177-0018.110993

Licença Creative Commons

e-ISSN 2177-0018 / ISSN 0566-1854.

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