Volume : VII, Issue : IV, April - 2018

ANATOMY OF SUCCESSFUL INFERIOR ALVEOLAR NERVE BLOCK

Subhra Mandal, Arindam Samaddar, Prabir Mandal

Abstract :

 The Mandibular Foramen (MF) is an opening on the internal surface of ramus of mandible leading into

mandibular canal (MC). The Inferior alveolar vessels & nerves enter through the mandibular foramen, pass
through mandibular canal , give anches to all mandibular teeth and exit through mental foramen(MeF) as mental vessels and nerves.
The position of MF is an important anatomical landmark for effective anaesthesia in Dentistry by Inferior Alveolar Nerve Block (IANB) for
many surgical procedures like lower jaw dental extraction, reduction of mandibular fractures as well as placing mandibular implants . The
accomplishment of successful anaesthesia in IANB depends on the proximity of the needle tip to the MF at the time of injection of local
anaesthetic agent. Aim of our study is to examine and evaluate the position of MF relative to four (4) bony landmarks in 100 dry samples of
adult dentulous human mandibles.
Materials and Methods: Dry human Mandibles were obtained from Department of
Anatomy, Medical College, Kolkata (India).Parameters were measured by digital vernier callipers. The data was tabulated and statistically
analysed.
Results: The mean distance between the Mandibular Foramen (MF) and the respective landmarks were noted as (17.06±2.567) mm ,
(9.75±1.68) mm. (22.71±3.41) mm.and ( 13.58±2.116 ) mm.for the anterior, posterior, inferior and superior border ( mandibular
notch) respectively for the right side. Likewise distances on the left sides were—(17.17±1.647)mm, (9.80±1.546) mm, (22.635±3.53) mm.
And (13.52±2.026) mm. for the anterior, posterior, inferior and superior border ( mandibular notch) respectively. Statistically, there was no
signi􀃶cant difference in the distance between mandibular foramen and respective four landmarks of both the sides.
Conclusion: Our study revealed almost bilateral symmetry for all the landmarks taken under consideration. We conclude that the failures
in the anaesthesia of Inferior alveolar nerve are mainly due to operator‘s error and not due to anatomical variations. Though the
knowledge of minor anatomical variations de􀃶nitely will help the dental surgeons during local anaesthesia involving IANB for Orthodontic
procedures.

Keywords :

Article: Download PDF    DOI : https://www.doi.org/10.36106/gjra  

Cite This Article:

Subhra Mandal, Arindam Samaddar, Prabir Mandal, ANATOMY OF SUCCESSFUL INFERIOR ALVEOLAR NERVE BLOCK, GLOBAL JOURNAL FOR RESEARCH ANALYSIS : Volume-7 | Issue-4 | April-2018


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