Accuracy in the Diagnosis of the Mental Nerve Loop. A Comparative Study Between Panoramic Radiography and Cone Beam Computed Tomography.
Dental implant and chin osteotomy are executed on the mandible body and the mental nerve is an important anatomical limit. The aim of this research was to know the position of the mental nerve loop comparing result in panoramic radiography and cone beam computed tomography. We analyzed 94 hemimandibles and the patient sample comprised female and male subjects of ages ranging from 18 to 52 years (mean age, 35 years) selected randomly from the database of patients at the Division of Oral Radiology at Piracicaba Dental School State University of Campinas; the anterior loop (AL) of the mental nerve was evaluated regarding the presence or absence, which was classified as rectilinear or curvilinear and measurement of its length was obtained. The observations were made in the digital panoramic radiography (PR) and the cone beam computed tomography (CBCT) according to a routine technique. The frequencies of the AL identified through PR and CBCT were different: in PR the loop was identified in 42.6% of cases, and only 12.8% were bilateral. In contrast, the AL was detected in 29.8% of the samples using CBCT, with 6.4% being bilateral; Statistical comparison between PR and CBCT showed that the PR led to false-positive diagnosis of the AL in this sample. According to the results of this study, the frequency of AL is low. Thus, it can be assumed that it is not a common condition in this population.
Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
Carlos Eduardo Gomes
CE
do Couto-Filho
Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
Paulo Hemerson
PH
de Moraes
Department of Oral Diagnosis and Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
Maria Beatriz Carrazzone
MB
Alonso
Department of Oral Diagnosis and Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
Francisco
F
Haiter-Neto
CIMA Research Group, Division of Oral and Maxillofacial Surgery, Universidad de La Frontera, Temuco, Chile; Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile.
Sergio
S
Olate
Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
José Ricardo
JR
de Albergaria-Barbosa
Cone-beam computed tomography; Mental nerve loop; Panoramic radiography
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