Tomographic analysis of the interalveolar space and thickness of the vestibular cortical bone in the parasymphyseal region of adult human mandibles

Tomographic analysis of the interalveolar space and thickness of the vestibular cortical bone in the parasymphyseal region of adult human mandibles

Author Fernandes, Atson Carlos de Souza Google Scholar
Uzêda, Sandra de Quadros Autor UNIFESP Google Scholar
Smith, Ricardo Luiz Autor UNIFESP Google Scholar
Alonso, Luis Garcia Autor UNIFESP Google Scholar
Gonzalez, Fabio Mota Google Scholar
Santos, Marcos Vinicius Google Scholar
Institution Univ Estado Bahia
Escola Bahiana Med & Saude Publ
Universidade Federal de São Paulo (UNIFESP)
Inst Hematol Feira de Santana
Abstract Purpose the aim of this study was to determine by computed tomography (CT) the interalveolar distance on mandible relative to the canine, first and second pre-molar, and the thickness of the cortical bone in the same region.Methods A hundred adult cadaveric dentate human hemi-mandibles were examined. A point (P) above the upper margin of the mental foramen was determined, the height at which monocortical screws are inserted to place miniplate according to the technique to treat mandibular fracture. Then, points A, B and C at the same height as point P, referring to the dental units namely canine, first and second pre-molars were marked to determine the CT cut level to measure cortical bone thickness and the interalveolar distance.Results the figures showed no statistically significant difference between the sides. the thickness of the vestibular cortical bone was less than 3.0 mm in 96% of the samples. in 91% of the samples the interalveolar distance between canine, first and second pre-molars was greater than 2 mm, a potentially safe condition to insert 2.0-mm diameter monocortical screws at the study points.Conclusions the individual actual anatomy of the region where screws are to be inserted above the mental foramen is important to perform the technique safely. We believe that the minimal cortical thickness to obtain sufficient screw anchorage should be studied in order to determine the actually safe shortest screw length. It is important to minimize the risk of tooth root damage or nerve injury and the amount of titanium in the human tissues.
Keywords Morphometry
Mandible
Interalveolar space
Monocortical screws
Computed tomography
Language English
Date 2010-12-01
Published in Surgical and Radiologic Anatomy. Paris: Springer France, v. 32, n. 10, p. 951-956, 2010.
ISSN 0930-1038 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 951-956
Origin http://dx.doi.org/10.1007/s00276-010-0659-8
Access rights Closed access
Type Article
Web of Science ID WOS:000285307600009
URI http://repositorio.unifesp.br/handle/11600/33112

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