296 mandible could be exposed Then the followingCS digital paquimeterRESULTS The values obtained in the left side hemiheads areshown in Table I The average distance obtained from thecoronoid proc ID: 337222
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Undoubtedly, the knowledge of the buccal nerveregion. Merril (1979) suggests that the branches of the buccalthis view. Initially, the buccal nerve presents an anteriortrajectory, expanding between both bundles of the lateralpterygoid muscle. Then it keeps a descendent trajectory next The aim of this work was to study the trajectory ofrior margin of the ramus of mandible, therefore providingimportant data for a safe surgical intervention in the region.MATERIAL AND METHOD In this study we used 10 hemi-heads (5 right and 5left) from male and female adults from different ethnicgroups. They were fixed in formol and belong to AnatomyLaboratory at the Faculty of Dentistry of Araraquara -UNESP. These hemi-heads were dissected by lateral accessanterior margin of the ramus of the mandible until itsALVES, N. SUMMARY: The knowledge of the buccal nerve anatomy is of fundamental importance not only for the anesthesia but also fora safe intervention in the retromolar area. The aim of this work was to study its trajectory, in the area where it is related tmargin of the ramus of the mandible, therefore providing important data for a safe intervention in the region. In this study we used 10hemi-heads from male and female adults, from different ethnic groups. They were fixed in formol, and belong to the Anatomy Laboat the Faculty of Dentistry in Araraquara UNESP. These hemi-heads were dissected by lateral access, preserving the buccal nervetrajectory related to the anterior margin of the ramus of the mandible until its penetration in the buccinator muscle. Next, we desinsertedthe masseter muscle so that all the ramus of the mandible were exposed. Then, the following measurements were carried out: from the CS digital paquimeter. The following average values were obtained: 32.26and 58.95 mm ( to the right side) from the base of the mandible until the apices of the coronoid process. We have concluded that normally,the buccal nerve crosses the anterior margin of the ramus of the mandible in an area which is above the superior half of the ramandible and also that the interventions in the retromolar region do not offer great risks of injury in the buccal nerve.KEY WORDS: Buccal nerve; Nerve anatomy; Nerve trajectory; Retromolar area. UNESP, Brasil. 296 mandible could be exposed. Then, the followingCS digital paquimeter.RESULTS The values obtained in the left side hemi-heads areshown in Table I. The average distance obtained from thecoronoid process was of 59.09 mm. The values obtained in The average distance obtained from the base of theTable I. Values obtained in the left side hemi-heads.Table II - Values obtained in the right side hemi-heads. Although some authors do have suggested that theALVES, N. Distance from the base of themandible until the buccalnerve (mm)Distance from the base of themandible until the apices ofthe coronoid process (mm)132.1059.01238.0269.30331.1056.56428.8052.40531.3058.20Average32.2659.09 Distance from the base ofthe mandible until thebuccal nerve (mm)Distance from the base of themandible until the apices of thecoronoid process (mm)132.7060.10236.6568.46329.8554.51430.0154.20531.0057.50Average32.0458.95 therefore not mentioned (Merril; MacGregor), we do not According to Singh (1981) the only report offossa. This variation, in which the buccal nerve was thoughtwas also described by Turner (1864). A similar variation in which both the buccal andmylohioid nerves branched from the inferior alveolar nerve Hendy (1996) concluded that the incisions upcould result in trauma to the buccal nerve. Taking intosuffers modifications with the involution of the masticatorydevice. With the loss of the teeth, the oblique and mylohyoidmargin of the ramus of the mandible as a remarkable pointIn our work we could observe that normally, thebuccal nerve crosses the anterior margin of the ramus of themargin of the ramus of the mandible in a region which isThe interventions in the retromolar region do not offerALVES, N. El conocimiento de la anatomn segura en la zona retromolar. El objetivo de este trabajo fue estudiar la trayectoria del nervio bucal, en lazona en que se relaciona con el margen anterior de la rama de la mandcabezas fueron fijadas en formol, y pertenecen al Laboratorio de Anatoma de Araraquara UNESP. Lasn con el margensculo buccinador. A continuacibula fue expuesta. A continuacipices de los procesos coronoides mandibular. Estas mediciones sen, normalmente, el nervio bucal cruza el margen anterior de la por encima de la media superior de la rama de la mandPALABRAS CLAVE: Nervio Bucal; Anatoma nerviosa; Trayectoria de los nervios; Zona retromolar. ndido, P. L. Anatomia para o cuso de ed. Sndido, P. L. Anatomia para o CirurgiHendy, C. W.; Smith, K. G. & Robinson, P. P. SurgicalBr. J. Oral Maxillofac.Surg., 34(5)Oral Surg. Oral Med. Oral Pathol., 60ALVES, N. MacGregor, A. J. NewYork, Oxford University Press, 1985.injury related to the difficult impaction. Sicher, H. & Dubrul, E. L. ed. SSingh, S. Aberrant buccal nerve encountered at third molarsurgery. Oral Surg. Oral Med. Oral Pathol., 52(2)Turner, W. On Some Variations in the Arrangement of theNerves of the Human Body. Nat. Hist. Rev., 4 / 2 01 34 /"56ALVES, N.