scholarly journals Topographical Landmarks for Identification of Inferior Alveolar Nerve and its Surgical Implications - a Cadaveric Study

2021 ◽  
Author(s):  
Ariyanachi K ◽  
Sushma P
Keyword(s):  
Nerve Block ◽  
Inferior Alveolar Nerve ◽  
Inferior Alveolar Nerve Block ◽  
Mandibular Ramus ◽  
Nerve Blocks ◽  
Mandibular Foramen ◽  
Bony Landmarks ◽  
Posterior Division ◽  
Mandibular Notch ◽  
Formalin Fixed

Abstract Background: Inferior alveolar nerve, which arises from the posterior division of the mandibular nerve, contains both sensory and motor fibres. The intraosseous course of the nerve is variable. Mandibular foramen is situated on the medial surface of the mandibular ramus. It is an important anatomical landmark for procedures like sagittal split osteotomies and inferior alveolar nerve block.Methods: The precise location of mandibular foramen was studied by the dissection of formalin fixed cadavers available for undergraduate dissection for a period of two years fron 2014-2016. Results: The mandibular foramen was 21±3.33 mm superior to the gonion at an angle of 980±50 with the base of the mandible. The mandibular foramen was 20.13±3.1 mm inferior to the lowest point of the mandibular notch. Accessory mandibular foramen was observed in 9.37% of the samples dissected.Conclusion: The present study explains the position of mandibular foramen in relation to prominent bony landmarks and the knowledge about the mandibular foramen, helps dental surgeons during inferior alveolar nerve blocks and split osteotomies.Practical implications: Failure rate of the inferior alveolar nerve block has been reported to be approximately 20-25%. A thorough anatomical knowledge of the mandibular ramus is essential for inferior alveolar nerve blocks and sagittal split osteotomies, since they are technically difficult procedures and as they are also associated with a higher incidence of complications.

scholarly journals MORPHOMETRIC ANALYSIS OF MANDIBULAR FORAMEN AND INCIDENCE OF ACCESSORY MANDIBULAR FORAMINA IN ADULT HUMAN MANDIBLES OF AN INDIAN POPULATION. Análisis morfométrico del foramen mandibular e incidencia de la foramina mandibular accesoria en mandíbulas adult

2016 ◽  
Vol 5 (2) ◽  
pp. 60-66 ◽  
Author(s):  
Prajna Paramita Samanta ◽  
Poonam Kharb
Keyword(s):  
Indian Population ◽  
Average Distance ◽  
Inferior Alveolar Nerve ◽  
Anatomical Location ◽  
Mandibular Ramus ◽  
Oral Surgical Procedures ◽  
Mandibular Foramen ◽  
Adult Human ◽  
Para Determinar ◽  
Mandibular Notch

El foramen mandibular es un importante hito anatómico. Para procedimientos como el bloqueo alveolar inferior del nervio, el tratamiento con implantes y osteotomías mandibulares, un profundo conocimiento de la ubicación del foramen mandibular (MF) y el foramen mandibular accesorio (AMF) es un requisito previo. Hay pocas referencias en la literatura con respecto a la localización anatómica exacta del foramen mandibular. Por lo tanto, el presente estudio tuvo como objetivo identificar la ubicación exacta de la MF y la incidencia de la AMF alrededor MF en una población india. Sesenta (60) mandíbulas humanas adultas fueron estudiadas para determinar la distancia del LV de la los anteriores, bordes posteriores de la rama mandibular, maxilar inferior categoría y el ángulo de la mandíbula. AMF todo el MF también fueron estudiados por su presencia y números. La distancia media de MF del borde anterior de rama mandibular fue 15,72 ±2,92 mm(lado derecho), 16,23 ±2,88 mm(lado izquierdo), de borde posterior fue 13,29 ±1,74 mm(lado derecho) y 12,73 ±2,04 mm(a la izquierda lado). La MF se encuentra 22,70 ±3 mm(lado derecho) y 22, 27 ± 2,62 mm(lado izquierdo) de la muesca mandibular. La distancia de MF de ángulo de la mandíbula fue 21,54 ±2,92 mm(lado derecho) y 21,13 ±3.43 mm(lado izquierdo). AMF estuvieron presentes en el 16, 66% de las mandíbulas. En 10% de las mandíbulas una sola AMF estaba presente y en el 6,66% hubo dos agujeros presentes. La ubicación del MF y AMF es importante para evitar compli-caciones como hemorragia y parestesia durante los procedimientos quirúrgicos orales y también para los radioterapeutas en la planificación de la radioterapia.  The mandibular foramen is an important anatomical land mark. For procedures like inferior alveolar nerve block, implant treatment and mandibular osteotomies, a thorough knowledge of the location of the mandibular foramen (MF) and accessory mandibular foramina (AMFs) is a prerequisite. There are few references in the literature regarding the exact anatomical location of the mandibular foramen. Therefore, the present study was aimed to identify the precise location of the MF and the incidence of AMFs around MF in an Indian population. Sixty (60) adult human mandibles were studied to determine the distance of the MF from the anterior, posterior borders of the mandibular ramus, mandibular notch and angle of the mandible. AMFs around the MF were also studied for their presence and numbers. The average distance of MF from the anterior border of mandibular ramus was 15.72 ±2.92 mm(right side), 16.23 ±2.88 mm(left side), from posterior border was 13.29  ±1.74 mm(right side) and 12.73 ±2.04 mm(left side).The MF was located 22.70 ±3 mm(right side) and  22.27 ±2.62 mm(left side) from mandibular notch. The distance of MF from angle of mandible was 21.54 ±2.92 mm(right side) and 21.13 ±3.43 mm(left side). AMFs were present in 16.66% of mandibles. In 10% mandibles a single AMF was present and in 6.66 % double foramina were present. Location of MF and AMF is important to avoid complications like hemorrhage and paresthesia during oral surgical procedures and also for radiotherapists in planning radiation therapy. 

scholarly journals Position of the Mandibular Foramen in Different Facial Shapes Assessed by Cone-Beam Computed Tomography - A Cross-Sectional Retrospective Study

2019 ◽  
Vol 13 (1) ◽  
pp. 544-550
Author(s):  
Silvan Correa ◽  
Rogério H. Lopes Motta ◽  
Milena B. Fellipe Silva ◽  
Sidney R. Figueroba ◽  
Francisco C. Groppo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Cone Beam Computed Tomography ◽  
Inferior Alveolar Nerve ◽  
The Other ◽  
Cone Beam ◽  
Inferior Alveolar Nerve Block ◽  
Mandibular Ramus ◽  
Cross Sectional ◽  
Mandibular Foramen

Purpose: The mandibular foramen, located on the internal surface of the mandibular ramus, is an important anatomical landmark for the success during the inferior alveolar nerve block. This cross-sectional retrospective study aimed to evaluate the location of the mandibular foramen through Cone-Beam Computed Tomography (CBCT) in different facial shapes. Materials and Methods: The determination of the location of the mandibular foramen was performed using CBCT of mesocephalic, dolichocephalic and brachycephalic patients (n=40 each). The ramus width (W), the distance from the mandibular foramen to the deepest point of the anterior border of the mandibular ramus (D), the distance from the mandibular foramen to the lowest point of the mandibular notch (V) and the distance from the inferior border of the mandible to the lowest point in of the mandibular border (R), as well as the ratios W/D and V/R, were measured. ANCOVA, two-way ANOVA and Chi-square tests were used to analyze the variation among the facial shapes. Results: The ramus width (W) was greater (p<0.0001) in the brachycephalic (28.4±0.5 mm) than in both mesocephalic (26.8±0.36 mm) and dolichocephalic (25.5±0.39 mm) patients. D (p=0.0433) and R (p=0.0072) were also greater in the brachycephalic (17.7±0.36 mm; 43.4±0.75 mm, respectively) than dolichocephalic (16.5±0.3 mm; 40.3±0.63 mm, respectively), but both did not differ from mesocephalic (17.3±0.36 mm; 41.8±0.66 mm, respectively) patients. The other measurements (V, W/D and R/V) did not significantly differ among facial shapes. Conclusion: The localization of the mandibular foramen was, in the horizontal direction, more posterior in the brachycephalic patients and, in the vertical direction, higher in the dolichocephalic patients, when compared to the other groups analyzed. Thus, the anatomic data found in this study may help dentists to increase the success of the inferior alveolar nerve block and prevent surgical complications.

The results of the development of a personalized method of mandibular foramen searching in the aspect of mproving the efficiency and safety of inferior alveolar nerve block

2019 ◽  
pp. 52-56
Keyword(s):  
Nerve Block ◽  
Inferior Alveolar Nerve ◽  
Mandibular Nerve ◽  
Inferior Alveolar Nerve Block ◽  
Mandibular Foramen

The position of mandibular foramen and its correspondence with the mandibular nerve are the key positions of the personified research. The ideas of different anatomic schools about the positions of mandibular foramen are based on their own research of native, clinical, radiological materials and on the averaged common tendencies.

Variants of inferior alveolar nerve block: A review

2014 ◽  
Vol 6 (1) ◽  
pp. 35-39 ◽  
Author(s):  
Rahul Seth ◽  
M. Anuradha ◽  
D.S. Yashavanth Kumar ◽  
Harsha V. Babji
Keyword(s):  
Success Rate ◽  
Nerve Block ◽  
Inferior Alveolar Nerve ◽  
Dental Practice ◽  
Inferior Alveolar Nerve Block ◽  
Anesthetize Patient ◽  
Mandibular Foramen ◽  
Floor Of The Mouth ◽  
Anaesthetic Solution ◽  
Mandibular Teeth

Abstract The inferior alveolar nerve block is the most common method for obtaining mandibular anaesthesia in dental practice, but it is estimated to have a success rate of only 80 to 85%. Traditional anaesthesia of the mandibular nerve and its branches consists of deposition of anaesthetic solution in the region of the mandibular foramen. This commonly used technique eliminates all somatosensory perception of the mandible, mandibular teeth, floor of the mouth, ipsilateral tongue, and all but the lateral (buccal) gingivae. In the case of difficulty-to-anesthetize patient, the inferior alveolar nerve can be particularly challenging. In those patients, other approaches may be necessary to achieve profound anaesthesia. This article summarizes the different approaches that may be utilized in such cases. How to cite this article Anuradha M, Yashavanth Kumar DS, Harsha VB, Rahul S. Variants of inferior alveolar nerve block. CODS J Dent 2014;6;35-39

scholarly journals Mandibular foramen location

2019 ◽  
Author(s):  
Fernanda Cristina Sales Salineiro ◽  
Solange Kobayashi-Velasco ◽  
Isabel Peixoto Tortamano ◽  
Rodney Garcia Rocha ◽  
Marcelo Gusmão Paraiso Cavalcanti
Keyword(s):  
Clinical Success ◽  
Inferior Alveolar Nerve ◽  
Mean Value ◽  
Cone Beam ◽  
Mandibular Ramus ◽  
Mandibular Foramen ◽  
Female Patients ◽  
The Mean ◽  
Student’S T ◽  
Mandibular Notch

Objective: This study proposed to locate the mandibular foramen position by using cone beam computed tomography (CBCT) imaging, based on landmarks used at inferior alveolar nerve block (IANB) technique in order to increase the success rate of this procedure. Materials and methods: 58 mandibular foramina of 29 adult patients were evaluated. Linear and angular CBCT measurements were defined for the mandibular foramen based on the IANB technique. The measurements were performed by two radiologists. Data analyses consisted of verifying the normality, obtaining the mean value of all patients and comparing the data obtained between male and female patients. Results: Student’s t and Mann-Whitney’s U tests were used to calculate the mean mandibular foramen position. The three mean position measurements of the mandibular foramen were 13.5 mm above the occlusal plan (15.5 mm for male and 11.7 mm for female patients), 14.6 mm below the mandibular notch (14.9 mm for male and 13.7 mm for female patients) and 14.2 mm from the anterior border of mandibular ramus (14.6 mm for male and 13.8 mm for female patients). The angle formed by the molar lines and contralateral premolar lines was 25.8° and the angle formed by the molar lines and contralateral second premolar/molar lines was 31.5°. Conclusion: CBCT images were a useful method to provide the measurements of the mandibular foramen position based on landmarks used by the IANB technique. We encourage the use of these measurements as reference to increase the clinical success when performing the IANB technique.

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