Avaliação de dispostivo alternativo ao arco facial para montagem de modelos em articuladores semi-ajustáveis

• Autor(a) principal: HARTMANN, Roberto
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/1377
• topic: Articuladores dentários; oclusão dentária; registro da relação maxilomandibular; Dental articulators; dental occlusion; jaw relation record; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::CLINICA ODONTOLOGICA

The aim of this study was to analyze the face-bow and three different camper planes, 0°, 15° e 20°, regarding the placement of maxillary cast and the fidelity of reproduction of occlusal contacts of casts mounted in semi-adjustable articulator arcon type. Were selected nine students over 18 years showing complete natural dentition whose cast maxillaries presented stable on surface plane. The 36 cast maxillaries were mounted in a single semi-adjustable articulator using four different techniques: facebow, camper plane of 0º, camper plane of 15º and camper plane of 20º. The first analysis was considering the position of the cast maxillary. On each side of the articulator were defined three points: one in the articulator, the condylar region (A) and two in the cast (B and C). Point B was positioned at the lower first molar buccal groove (intercuspal region) and C at the midpoint of the first molar (mesio-distal), 1cm above the intercuspal region. Through the digital camera (Rebel XTi) positioned at a standard distance of 1.15 m of articulating images were obtained on each side of the articulator. Using the software Image J was given angle "&#945;" formed by the intersection of the line segments AB and BC. For analysis reproducibility of occlusal contacts the cast mandibles were mounted in maximum intercuspation. The points of contact clinical and casts were recorded with carbon Accufilm. The area (mm2) of the points of contact on the lower left first molar of each group was quantified in Image J software, using images obtained with a digital camera (Rebel XTi). As for the positioning of the cast maxillary no significant difference was found just between the plane and the face-bow (p<0.001). None of the mounting techniques were effective in reproducing clinical contact points (p<0.001).