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- W2390139895 abstract "Objective To study the morphology of the root canal orifices in human mandibular primary molars.Methods Using 86 human mandibular primary molars within an age range of 3～8 years. After a dental X-ray was taken, and following removal of the roof of pulp chamber and pulpectomy, a silicone impression of the pulp orifice was obtained directly from the primary molars. By this means, an epoxy-resin replica was made and sliced at two points: 0.5 and 1.0mm from the pulpal floor respectively. Several variables were considered for the morphometric study of the pulp orifice such as width, length, area, frequency and size of the concavity at the selected levels. The samples were dlivided into three groups according to age in order to find out any influence according to age.Results The width of the pulp orifices in first primary molars showed a greater value at the mesial root than at the distal root, while in the second molars it was just the opposite. The values obtained by measuring the X-ray films were slightly greater than those obtained from the resin models. The length in the first primary molar showed a smaller value at the mesial root than at the distal root, while in the second primary molar the two values were similar. The area in both first and second primary molars was smaller at the mesial root than at the distal one. With regard to the influence of age, the thickness of the floor of the pulp chamber increased in both first and second molars.Conclusion The obtained data in this study are of great importance when selecting the size of the instrument during endodontic therapy specially while pulpectomy is undertaken." @default.
- W2390139895 created "2016-06-24" @default.
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- W2390139895 date "2002-01-01" @default.
- W2390139895 modified "2023-09-25" @default.
- W2390139895 title "Morphologic study of the root canal orifices in human mandibular primary molars" @default.
- W2390139895 hasPublicationYear "2002" @default.
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