Cortical bone thickness of the mandibular canal and implications for bilateral sagittal split osteotomy: a cadaveric study

Sakulsak, Natthiya; Putiwat, Phongpitak; Amarttayakong, Pattama; Iamsaard, Sitthichai; Trakulsuk, H.; Hirunyakorn, K.; Suarbua, S.; Wattanaraeungchai, Y.

doi:10.1016/j.ijom.2016.12.008

Cited by 15 publications

(13 citation statements)

References 20 publications

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“…As CBCT has developed and gained popularity in implant surgery, evaluation of mandibular bone density has been considered an important part of the preoperative diagnosis and surgical planning. In this regard, many researchers have investigated the location of the mandibular canal (Koivisto et al, ; Promma et al, ). The present study focused on two different aspects of the mandible.…”

Section: Discussionmentioning

confidence: 99%

Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology

Iwanaga

Anand²,

Jain

et al. 2019

Clinical Anatomy

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Our goal was to clarify the relationship between the superior wall of the mandibular canal and the presence of teeth. We also sought to study the structural changes of the mandibular canal after tooth loss. Twenty sides from 10 dry mandibles derived from six males and four females were used for this study. The age of the specimens at the time of death ranged from 57 to 91 years. The mandibles were cut in the midline resulting in 20 hemi-mandibles. The presence of teeth (from the second premolar to the third molar) was recorded for each hemi-mandible. The mandibular canal in the body of the mandible was divided into four areas, that is, Areas 1-4. The superior wall of the mandibular canal and a cancellous bone pattern above the mandibular canal were observed. Next, the mandibular canal was horizontally cut at its center and the superior wall of the mandibular canal observed inferiorly. A total of 75 areas (20 dentulous areas and 55 edentulous areas) were produced. The distal view was classified into three groups, Type I (trabecular pattern), Type II (osteoporotic pattern), and Type III (dense/irregular pattern). The Type I pattern was found in 60.0%

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Section: Discussionmentioning

confidence: 99%

Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology

Iwanaga

Anand²,

Jain

et al. 2019

Clinical Anatomy

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“…Promma et al25 measured the distance from the canal to the buccal cortical margin and to the inferior cortical margin using a bone cutting technique for each tooth in a cadaveric mandible. The distance from the canal to the buccal bone at the second molar was 7.60 mm, and the distance to the inferior bone was 8.89 mm, which was larger than that at the first molar.…”

Section: Discussionmentioning

confidence: 99%

“…Nagadia et al26 reported that a vertical cut should be performed at the second molar region during SSRO because the distance between the canal and the buccal bone is the largest at the second molar, and they also suggested a safe vertical cutting depth of 4.8 mm. Promma et al25 conducted a cadaveric study to measure the canal's course and suggested that the vertical cut for SSRO should be performed at the site of the first molar where the canal is the lowest. They also suggested a cutting depth for each tooth location and revealed that, when performing sagittal cutting at the second molar site, the depth was 6.5 mm.…”

Section: Discussionmentioning

confidence: 99%

Anatomical position of the mandibular canal in relation to the buccal cortical bone: relevance to sagittal split osteotomy

Lee

Han

2018

J Korean Assoc Oral Maxillofac Surg

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ObjectivesClassification of the degree of postoperative nerve damage according to contact with the mandibular canal and buccal cortical bone has been studied, but there is a lack of research on the difference in postoperative courses according to contact with buccal cortical bone. In this study, we divided patients into groups according to contact between the mandibular canal and the buccal cortical bone, and we compared the position of the mandibular canal in the second and first molar areas.Materials and MethodsClass III patients who visited the Dankook University Dental Hospital were included in this study. The following measurements were made at the second and first molar positions: (1) length between the outer margin of the mandibular canal and the buccal cortical margin (a); (2) mandibular thickness at the same level (b); (3) Buccolingual ratio=(a)/(b)×100; and (4) length between the inferior margin of the mandibular canal and the inferior cortical margin.ResultsThe distances from the canal to the buccal bone and from the canal to the inferior bone and mandibular thickness were significantly larger in Group II than in Group I. The buccolingual ratio of the canal was larger in Group II in the second molar region.ConclusionIf mandibular canal is in contact with the buccal cortical bone, the canal will run closer to the buccal bone and the inferior border of the mandible in the second and first molar regions.

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“…1.0, Robert McNeel & Associates, Seattle, WA, USA), an all-purpose finite element analysis program (ANSYS Mechanical Rel.17.0, ANSYS, Inc., Canonsburg, PA, USA), and a 3D direct modeler (ANSYS SpaceClaim Direct Modeler, SpaceClaim Corp., Canonsburg, PA, USA). The dimensions of cortical bone, cancellous bone, and residual ridge mucosa were constructed by using information from previous reports [9][10][11]. In the contact condition, the denture base resin and metal frame against the residual ridge mucosa and teeth were set as contact elements.…”

Section: Construction Of Three-dimensional Finite Element Modelsmentioning

confidence: 99%

Mechanical effects of residual bone mass, a maxillofacial prosthesis, and a reconstruction plate on the mandible after marginal resection

et al. 2020

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In this study, analytic models were used to simulate marginal resection in the area of the second premolar to the second molar region, and the mechanical effects on the mandible of residual bone mass, a maxillofacial prosthesis, and a reconstruction plate were evaluated by three-dimensional finite element analysis. As residual bone mass decreased, maximum principal stress increased near the anterior ramus of the mandible, and maximum shear stress increased at the anterior buccal region of the resected area. In the mandible with a maxillofacial prosthesis, the maximum principal stress distribution at the anterior ramus was lower, and the distribution of maximum shear stress at the anterior buccal region of the resected area was higher. When a reconstruction plate was used, maximum principal stress and maximum shear stress were lower. Thus, lower residual bone mass was associated with increased mandible deflection and torsion. In addition, presence of a maxillofacial prosthesis decreased deflection but increased torsion, and presence of a reconstruction plate decreased deflection and greatly decreased torsion. These findings suggest that decreased residual bone mass and maxillofacial prostheses increase fracture risk; however, presence of a reconstruction plate was effective in decreasing torsional stress, thereby reducing fracture risk in the mandible.

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Cortical bone thickness of the mandibular canal and implications for bilateral sagittal split osteotomy: a cadaveric study

Cited by 15 publications

References 20 publications

Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology

Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology

Anatomical position of the mandibular canal in relation to the buccal cortical bone: relevance to sagittal split osteotomy

Mechanical effects of residual bone mass, a maxillofacial prosthesis, and a reconstruction plate on the mandible after marginal resection

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