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The Anatomy of Extraoral Mandibular Nerve Block

Alipta Bhattacharya , Alipta Bhattacharya , Arpan Dey , Debjyoti Basu , Apala Bhattacharya

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Indian Journal of Anatomy 2(2):p 73-79, July - December 2013. | DOI:

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Abstract

Effective pain control is one of the most important aspects of dental care and maxillofacial surgery.. Having broad knowledge of anatomy is essential for practicing dentistry. The main difficulty with the traditional approach to the mandibular nerve block is the absence of consistent anatomical landmarks. The Significant advantages of the Mandibular nerve block over Inferior Alveolar nerve block include its higher success rate and the absence of problems with accessory sensory innervation to the mandibular teeth. Extraoral mandibular nerve blocks can be attempted in cases of Trismus . However this approach of MNB is not conventional due to unavailability of surface landmarks . The aim of this study is to specify landmarks in dissected cadaveric specimens that will act as a guide for an easy approach to Extraoral Mandibular nerve block(EOMNB). Our study revealed that, in a case of EOMNB , the average distance from centre of base of tragus to the point of needle entry is 1.44 ± 0.15 cm.The average depth the needle has to pass from the skin surface perpendicularly to reach the trunk of the mandibular nerve for a proper dissipation of dye to occur is 4.26 ± 0.33 cm. 

Keywords: Mandibular nerve; Extraoral mandibular nerve block. 

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