Abstract

RAMIREZ, R. A et al. Incremento de volumen de cavidades clase I en molares humanos durante el reemplazo de restauraciones de resina compuesta y amalgama por diferentes grupos de operadores y su relación con el conocimiento en MIO. Acta odontol. venez [online]. 2008, vol.46, n.3, pp.289-294. ISSN 0001-6365.

The removal and substitution of restorations during the patient's life can result in wide and deep cavities. Hence, it is necessary to be conservative when a substitution is required. Objective: the purpose of this research was to evaluate the increment of volume in class I cavities after removing composite and amalgam restorations by different groups of operators. Method: 60 people belonging to one of these groups were selected: undergraduate students G1, graduate students G2, professors of the department of restorative dentistry G3, and general dentist working in public services G4. Each operator answered the test of knowledge on Minimal Invasive Dentistry (MID), and the he/she removed two restorations: one of composite (C) and other of amalgam (DA). For the reparation of the sample teeth a copy of the occlusal surface with acrylic and a mold of the healthy tooth were obtained. Later, occlusal preparation was performed (Class I Black). Initial volume was registered with polivinil siloxane material and using the equation v=m/d. then, cavities were filled and a second register or volume was performed after remotion to evaluate volume increment. Inferential statistical tests were performed to analyze the data (1-way ANOVA, MANOVA and lineal regression). Results: when comparing knowledge about MID and groups of operators, the ANOVA did not show statistically significant differences. The MANOVA analysis indicated that differential volume was not statistically significantly different among the groups of operators and materials. The lineal regression analysis indicated that there is not predictive relationship between the test of MIO's scores and increment of volume in cavities. Conclusions: Under the conditions of the present study, cavities volume increment does not depend on operator's experience.

Keywords : cavities volume increment; restorations replacement; Minimal Invasive Dentistry.