Decompression of Large Cyst Invading the Mandibular Canal Leading to Reduced Cyst Volume and Increased Mandibular Canal Length

The retromolar canal is an anatomical variation that occurs in the mandibular bone. The retromolar canal typically originates in the mandibular canal on the distal side of the third molar and extends forward and upward to the retromolar foramen (RMF), which contains the neurovascular bundle. Accidentally damaging the neurovascular bundle in the retromolar canal during the extraction of the third molar, dental implant surgery, or maxillofacial orthognathic surgery may lead to subsequent complications such as incomplete local anesthesia, paresthesia, and bleeding during operation. The objective of this study was to investigate the prevalence of the RMF in the Taiwanese population in a medical center by using dental cone-beam computed tomography (CBCT) and to identify the position of the RMF in the mandibular bone. The dental CBCT images for the mandibular bone of 68 hemi-mandible were uploaded to the medical imaging software Mimics 15.1 to determine the prevalence of the RMF in the Taiwanese population and the three positional parameters of the RMF in the mandibular bone: (1) The diameter of the RMF, (2) the horizontal distance from the midpoint of the RMF to the distal cementoenamel junction of the second molar, and (3) the vertical distance from the midpoint of the RMF to the upper border of the mandibular canal. Seven RMFs were observed in the 68 hemi-mandibles. Thus, the RMF prevalence was 10.3%. In addition, the diameter of the RMF was 1.41 ± 0.30 mm (mean ± standard deviation), the horizontal distance from the midpoint of the RMF to the distal cementoenamel junction of the the second molar was 12.93 ± 2.87 mm, and the vertical distance from the midpoint of the RMF to the upper border of the mandibular canal below second molar was 13.62 ± 1.3487 mm. This study determined the prevalence of the RMF in the Taiwanese population in a medical center and its relative position in the mandibular bone. This information can provide clinicians with a reference for posterior mandible anesthesia and surgery to ensure medical safety.

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Asymptomatic lymphangioleiomyomatosis: Large cyst mimicking a hydropneumothorax in a healthy patient

Radiology Case Reports ◽

10.1016/j.radcr.2021.03.004 ◽

2021 ◽

Vol 16 (6) ◽

pp. 1325-1328

Author(s):

Caterina Benedetto ◽

Ugo Barbaro ◽

Carmelo Anfuso ◽

Annalisa Militi ◽

Rosa Morabito ◽

...

Keyword(s):

Healthy Patient ◽

Large Cyst

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Clinical aspects of the anatomical correlation between mandibular canal, inferior third molar and sensitive alterations of the inferior alveolar nerve

International Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.ijom.2019.03.187 ◽

2019 ◽

Vol 48 ◽

pp. 61

Author(s):

B. Dezen Vieira ◽

L.E. Santos Tavares Farias ◽

M. Mercadante Santana Cruz ◽

B. Ferreira Brasileiro

Keyword(s):

Inferior Alveolar Nerve ◽

Third Molar ◽

Mandibular Canal ◽

Clinical Aspects ◽

Anatomical Correlation

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GPU-Based Haptic Simulator for Dental Bone Drilling

Volume 2: 31st Computers and Information in Engineering Conference, Parts A and B ◽

10.1115/detc2011-47019 ◽

2011 ◽

Cited By ~ 2

Author(s):

Fei Zheng ◽

WenFeng Lu ◽

Yoke San Wong ◽

Kelvin Weng Chiong Foong

Keyword(s):

Real Time ◽

Graphics Processing Units ◽

Force Feedback ◽

Mandibular Canal ◽

Structure Design ◽

Patient Specific ◽

Force Model ◽

Bone Drilling ◽

The Real ◽

Drill Bits

Dental bone drilling is an inexact and often a blind art. Dentist risks damaging the invisible tooth roots, nerves and critical dental structures like mandibular canal and maxillary sinus. This paper presents a haptics-based jawbone drilling simulator for novice surgeons. Through the real-time training of tactile sensations based on patient-specific data, improved outcomes and faster procedures can be provided. Previously developed drilling simulators usually adopt penalty-based contact force models and often consider only spherical-shaped drill bits for simplicity and computational efficiency. In contrast, our simulator is equipped with a more precise force model, adapted from the Voxmap-PointShell (VPS) method to capture the essential features of the drilling procedure. In addition, the proposed force model can accommodate various shapes of drill bits. To achieve better anatomical accuracy, our oral model has been reconstructed from Cone Beam CT, using voxel-based method. To enhance the real-time response, the parallel computing power of Graphics Processing Units is exploited through extra efforts for data structure design, algorithms parallelization, and graphic memory utilization. Preliminary results show that the developed system can produce appropriate force feedback at different tissue layers.

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Cutaneous tuberculosis of gluteal region presenting as a sinus and large cyst: An unusual entity

Journal of Cutaneous and Aesthetic Surgery ◽

10.4103/0974-2077.79201 ◽

2011 ◽

Vol 4 (1) ◽

pp. 65

Author(s):

Rikki Singal ◽

Prem Singh ◽

Amit Mittal ◽

Samita Gupta ◽

Raman Gupta ◽

...

Keyword(s):

Gluteal Region ◽

Large Cyst ◽

Cutaneous Tuberculosis

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Position of the mandibular canal before and after bilateral sagittal split ramus osteotomy: a cone beam computed tomography study

British Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.bjoms.2021.05.001 ◽

2021 ◽

Author(s):

Fernanda Chiguti Yamashita ◽

Lilian Cristina Vessoni Iwaki ◽

Amanda Lury Yamashita ◽

Elen de Souza Tolentino ◽

Vinicius Eduardo de Oliveira Verginio ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Mandibular Canal ◽

Cone Beam ◽

Sagittal Split Ramus Osteotomy ◽

Before And After

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Bifid mandibular canal

Journal of Oral and Maxillofacial Surgery ◽

10.1053/joms.2003.50004 ◽

2003 ◽

Vol 61 (4) ◽

pp. 422-424 ◽

Cited By ~ 69

Author(s):

J.M. Sanchis ◽

Miguel Peñarrocha ◽

F. Soler

Keyword(s):

Mandibular Canal ◽

Bifid Mandibular Canal

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Mandibular Canal Widening and Bell’s Palsy: Sequelae of Perineural Invasion in Oral Cancer

Case Reports in Dentistry ◽

10.1155/2016/3010934 ◽

2016 ◽

Vol 2016 ◽

pp. 1-4

Author(s):

Gopinath Thilak Parepady Sundar ◽

Vishwanath Sherigar ◽

Sameep S. Shetty ◽

Shree Satya ◽

Sourabh M. Gohil

Keyword(s):

Oral Cancer ◽

Perineural Invasion ◽

Oral Submucous Fibrosis ◽

Inferior Alveolar Nerve ◽

Mandibular Canal ◽

Distinct Disease ◽

Nerve Tracts ◽

Submucous Fibrosis ◽

Neurological Disturbance ◽

Shed Light

Perineural invasion is an underrecognized route of metastatic spread along the nerve bundles within the nerve sheath into the surrounding tissues. It hinders the ability to establish local control as tumour cells can traverse along nerve tracts well beyond the extent of any local invasion rendering them inoperable and unresectable. Perineural invasion is a marker of poor prognosis. Oral submucous fibrosis with oral cancer constitutes a clinicopathologically distinct disease. Our case highlights an enigmatic presentation of oral submucous fibrosis and its coexistence with oral cancer presenting with unusual neurological disturbance of the inferior alveolar nerve and facial nerve and diffuse widening of the mandibular canal. The objective of this case report is to enumerate the significance of perineural invasion in determining the course of the disease and necessitate the need for future studies that can shed light on molecular mediators and pathogenesis of perineural spread.

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