Correlation Between the Posterior Mandibular Width and the Lingual Gap caused by Symphyseal Fractures, Using a Virtual Model

Publication date: Available online 7 December 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Christian Pedemonte Trewhela, Andrea Carmona Avendaño, Edgardo González Mora, Ilich Vargas Farren, Francisco Lopetegui Caceres, Erick Rojas Quiroz
PurposeThe objective was to determine the dimensional impact on an occlusal and articular level of the gap produced in the lingual plate from symphyseal fractures, correlated with the dimensional change in the posterior mandibular width.MethodsAn observational experimental study based on 30 CT scans of patients in the Maxillofacial Surgery Service at the Hospital Clínico Mutual de Seguridad in Santiago, Chile, between 2012 and 2016. The inclusion criteria were jaws without traces of fractures or pathologies, absence of orthodontic appliances and complete dentition to the first mandibular molar. Using Digital Dental Service® 3D planning software, a vertical mandibular fracture was made, leaving lingual gaps of 1, 2, and 3 mm, recording the dimensional changes with regard to the posterior facial width.ResultsThe mandibular height did not vary with regard to the lingual gap; the mandibular length was inversely proportional to the lingual gap and, the intermolar, intergonial and intercondylar distances are directly proportional to increases in the lingual gap.ConclusionThe larger the lingual gap, the shorter the mandibular length and the larger the mandibular transverse dimensions. Special attention must be paid to the occlusal and articular level.



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