Computed tomographic analysis of the position and course of the mandibular canal: relevance to the sagittal split ramus osteotomy

Tsuji, Yoshiyuki; Muto, Toshitaka; Kawakami, Joji; Takeda, Shigehiro

doi:10.1016/j.ijom.2004.06.001

Cited by 89 publications

(75 citation statements)

References 12 publications

(11 reference statements)

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“…17 Our previous study using horizontal images of CT showed that the distance between the mandibular canal and the split surface correlated with TSEP latency recovery. 18 In a previous study 19 , the sagittal split area in the Obwegeser-Dal…”

Section: Discussionmentioning

confidence: 89%

Position of Mandibular Canal and Ramus Morphology Before and After Sagittal Split Ramus Osteotomy

Ueki

Okabe

Miyazaki

et al. 2010

Journal of Oral and Maxillofacial Surgery

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Purpose. The purpose of this study was to evaluate changes in the mandibular canal and ramus morphology before and after a sagittal split ramus osteotomy (SSRO). Results. Postoperative ramus width, lateral distance, lateral marrow distance and canal length were significantly larger than the pre-operative values, at the foramen, 1cm lower and 2 cm lower levels. The mandibular canal completely contacted the lateral cortex without lateral bone marrow in 6 sides (10%) in level A and B, and 4 sides (6.7%) in level C pre-operatively and 6 sides (10%) in level C post-operatively. Subjects andConclusion. This study suggested that postoperative mandibular canal position was located more posteriorly and the postoperative lateral bone marrow became thicker compared to the pre-operative state.

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Section: Discussionmentioning

confidence: 89%

Position of Mandibular Canal and Ramus Morphology Before and After Sagittal Split Ramus Osteotomy

Ueki

Okabe

Miyazaki

et al. 2010

Journal of Oral and Maxillofacial Surgery

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“…Studies on panoramic radiographs showed variations of the mandibular canal according to age, sex, race and development of the alveolar bone (Tronje et al, 1981;Wadu et al, 1997;Oguz & Bozkir, 2002;Yamamoto et al, 2002;Ylikontiola et al, 2002;Tsuji et al, 2005), but only Jung et al (2007) reported the location of the mandibular canal with the type of occlusal class (class III Angle) individuals. Based on the classification of mandibular canal by Nortjé et al and a study by Jung et al (2012), the present study evaluated the position of the mandibular canal in relation to the apices of the lower molars and related to the three classes of occlusal Angle, which so far does not exist in the scientific literature.…”

Section: Discussionmentioning

confidence: 99%

Relations Between the Mandibular Canal and I, II and III Angle Classes in Panoramic Radiographs

et al. 2014

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Relations between the mandibular canal and I, II and III Angle Classes in panoramic radiographs. Int. J. Morphol., 32(2):449-454, 2014. SUMMARY:To prevent injury to the inferior alveolar nerve during dental procedures, knowledge of its anatomical location and course of the mandibular canal is imperative. The aim of this study was evaluate the location on panoramic radiographs of the mandibular canal in relation to the apices of the permanent mandibular molars and base mandible, and relate the type of mandibular canal with Angle classes I, II and III. We evaluated 748 panoramic radiographs distributed according to sex and occlusal class (Angle I, II and III) of fully dentate individuals, 18-51 age group. The radiographs were divided according to Angle classes based on cephalometric tracing, clinical data from the medical records of each individual and the analysis of of the maxillar and mandibular dental arches models. The same individuals had the mandibular canal bilaterally assessed, and classified according to their location relative to the root apices of the mandibular molars and mandible base. Measurements of the distance from the mandibular canal to the apices of the teeth and mandible base were made on the Software ImageLab2000®. The intra-observer reproducibility of measurements on radiographs was assessed using the coefficient of variation (p<0.0001). Data were submitted to Kruskal-Wallis test, on software BioEstat 5.0. There were statistically significant differences (Kruskal-Wallis test, p <0.0001) between the occlusal classes, with the type of mandibular canal. A larger number of canals types 2 and 3 in class III individuals than in others. In conclusion, the location of the mandibular canal presents morphological changes in relation to the apices of the permanent molars, and the mandibular base according to the Angle classes I, II and III.

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“…It is associated with the surgical manipulations using a saw or osteotome producing direct nerve injury [5,27].…”

Section: Discussionmentioning

confidence: 99%

Incidence of inferior alveolar nerve affection with and without nerve exposure during bilateral sagittal split osteotomy

Sadakah

Elshall

2018

OMX

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Objective: The aim of this study was to determine the presence and severity of inferior alveolar nerve (IAN) affection during bilateral sagittal split osteotomy (BSSO) in two groups of patients with and without direct exposure and visualization of the nerve during surgical procedure. Patients and Methods: In this prospective randomized clinical study, 14 patients (28 sides) indicated for BSSO were included. The sides were randomly divided into two groups with equal number of sides (14 sides). Group I with wide soft tissue dissection of the medial side of the ramus and exposure of IAN above the ligula and group II with minimal soft tissue dissection of the medial side of the ramus without exposure of IAN. For evaluation of neurosensory function of IAN, two methods were used including subjective evaluation and two-point discrimination test. Results: According to the subjective evaluation, there was a statistically significant difference between both groups in favor of group II in all follow-up recalls except in the final one at 12 months postoperatively. Considering the results of two-point discrimination test, the improvement obviously continued during the successive follow-up periods in both groups, with a statistically significant difference in favor of group II until the ninth month, and then in the last follow-up at the 12 th month, the records were almost equal. Conclusion: To markedly reduce the postoperative neurosensory disturbances of IAV and to accelerate the full recovery of sensation of the lower lip and chin regions following BSSO, limited exposure and dissection of the medial soft tissues of the ramus should be practiced with avoidance of direct exposure and manipulation of IAN.

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Computed tomographic analysis of the position and course of the mandibular canal: relevance to the sagittal split ramus osteotomy

Cited by 89 publications

References 12 publications

Position of Mandibular Canal and Ramus Morphology Before and After Sagittal Split Ramus Osteotomy

Position of Mandibular Canal and Ramus Morphology Before and After Sagittal Split Ramus Osteotomy

Relations Between the Mandibular Canal and I, II and III Angle Classes in Panoramic Radiographs

Incidence of inferior alveolar nerve affection with and without nerve exposure during bilateral sagittal split osteotomy

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