Influence of the inclination of the plate of an intra‐oral tracing device on the condylar position registered by tapping movement

Abstract

The object of this study was to determine the best inclination of the intra-oral tracing device to get optimum condylar position with the registration of tapping movement. Three appliances with different tracing plate inclinations were used in five healthy subjects. The tracing plates were set at 0 degrees to occlusal plane (horizontal); at the angle formed by drawing a line from condylar point to the stylus position at occlusal plane (inclined); then at the angle half to inclined (half-inclined). Subjects made Gothic arch and tapping movements (n = 30) at a 30 mm interincisal distance with the head Camper plane horizontal. The incisal and condylar points were tracked with a 6-degree-of-freedom jaw movement tracking system. The location of gothic arch apex, the distribution and mean position of 30 tapping points from intercuspal position were analyzed in incisal and condylar point between the appliances. Data were analyzed with repeated measures one-way anova. Results showed that mean position of tapping points were significantly different among the appliances. Half-inclined appliance recorded tapping points in a convergent area nearer to intercuspal position (IP) than other appliances. In all appliances, the contact points of the tapping movement were anterior to Gothic arch apex.

Effects of stress and relaxation on pain perception in subjects with pain‐free occlusional disharmony compared with healthy controls

“…Using ultrafine colored occlusion foils and Artus shim stock, centric occlusion was analyzed. In addition, tooth contacts were analyzed by model analysis on articulated casts (facebow transfer, Gothic arch, and control of the tapping point) (Rahman et al , ). The centric occlusion was determined with joint‐related model orientation in the articulator, intra‐oral Gothic arch tracing, and the adduction point.…”

Analise tomografica do relacionamento cabeça da mandibula/fossa mandibular obtido por meio da tecnica do tratado do arco gotico

“…Na época em que Gysi desenvolveu essa técnica a definição de RC era de posição mais retruída da mandíbula em relação à maxila, por isso esse autor utilizava o vértice como referência. O que é utilizado como referência, quando se considera a definição de homogeneidade e simetria dos espaços articulares para RC, é um ponto intrabordejante, situado na trajetória protrusiva (Denen, 1938;Boss, 1940;Omatsu, 1996;Ramos, 2003;Rahman, 2004;Zanatta et al, 2006;Casselli et al, 2007;Paixão et al, 2007), mais especificamente, 1,4mm do vértice (Ramos, 2003;Zanatta et al, 2006;Paixão et al, 2007). Neste estudo, utilizou-se o vértice como referência, pois o objetivo foi registrar a posição de retrusão máxima mandibular e não a RC.…”