2018, Number 1-2
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ABSTRACTThe dental furca presents complex morphological characteristics that limit instrumentation during periodontal debridement with target curettes. Objective: To relate the dimensions of the periodontal curettes with the width of the dental furcation entrance. Material and methods: The entrance of the furcation was evaluated in 88 molars extracted, 45 maxillary molars (M Max) and 43 mandibular molars (M Mand), through a precision caliper. Four types of periodontal curettes (Gracey 5/6, 7/8, 9/10 and McCall 17/18) were measured at the level of their active part divided into anterior, middle and posterior thirds. The differences in the width of the entrance of the tooth furrow for each type of molar were calculated through the analysis of variances (ANOVA). Results: The entrance of the mesial furcation of M Max presented an average width of 1.24 ± 0.19 mm, while the entrance of the mouth furca of M Mand was 1.15 ± 0.25 mm. The average width of the Gracey curettes was 0.92 mm, while that of the McCall one was 0.72 mm. 50% of Gracey curettes 5/6, 7/8 and 9/10 presented widths between 0.8-1 mm; likewise, 35% of the McCall 17/18 curettes measured 1-1.2 mm. Conclusions: The entrance of the furca in maxillary molars was greater at the mesial level, while in the mandibular molars it was at the buccal level. The average width of the periodontal curettes ranged between 0.7-0.9 mm, with the McCall curettes being the most related to the entries of the furcation of the molars studied.
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