Influence of the Carabelli Tubercle on the chamber roof topography from extracted human first upper molars.

Abstract

O objetivo do estudo foi analisar a topografia do teto da câmara pulpar (CP) de 1os molares superiores (MS) permanentes, mediante a presença e o tamanho do Tubérculo de Carabelli (TC). Trinta MS foram divididos em três grupos contendo 10 dentes: 1 - com TC pronunciado; 2 – com TC pouco proeminente; 3 – TC ausente. Os dentes foram desgastados transversalmente, de oclusal para cervical, até a exposição de todos os cornos pulpares, e, a seguir, de apical para cervical, eliminando-se o assoalho de CP, sem tocar no teto correspondente. A forma do teto da CP foi desenhada, mediante o traçado de linhas tangentes aos cornos pulpares. Em todos os espécimes foram encontrados 4 cornos pulpares. A forma da CP foi trapezoidal a quadrangular em 100% dos casos. Concluiu-se que a forma do teto da CP de 1os MS é trapezoidal a quadrangular, em função da presença de 4 cornos pulpares, independentemente da existência e tamanho do TC. A forma de contorno da abertura coronária de 1ºs MS deve ser trapezoidal a quadrangular.

The aim of this study was to analyze the pulp chamber roof topography from extracted human permanent first upper molars taking into account the presence and size of the Carabelli Tubercle (CT). Thirty (30) upper molars were divided into three groups of ten (10) samples. Group1: showing pronounced CT; Group 2: showing lightly pronounced CT; Group 3: absence of CT. The samples were abraded transversally on an oclusal-cervical direction until all pulp horns were exposed and then on an apical-cervical direction in order to eliminate the pulp chamber floor without touching the corresponding roof. The specimens were photographed and the number of pulpal horns registered. The shape of the pulp chamber roof was drawn using lines tangential to the pulpal horns. All specimens presented four (04) pulpal horns. The pulp chamber was trapezium- to square-shaped in all cases. It appears from the present study that the pulp chamber roof from first upper molars is trapezium- to square-shaped due to the presence of four (04) pulpal horns irrespective of the CT presence or size.