The mandibular length and height in the adult dogs (Table 1) were greater than the data obtained for German shepherd (Alsatian) puppies [15]. Similar results had been reported in the values of the distances between the mandibular foramen to base of mandible, the condyloid fossa to height of mandible and condyloid fossa to the base of the mandible [15].
The caudal border of the mandible to bellow of the mandibular foramen was 1.3 cm in the adult dogs. In addition, the distance from the caudal border of mandible to the level of mandibular foramen and from the latter to the border of mandibular angle was 0.97 cm and 0.93 cm, respectively. The anesthetic agents must to be injecting on the medial side of the mandible, thereby; a successful nerve block produces anesthesia of the lower jaw with its teeth and the lower lip. These data are necessary for achieving the regional anesthesia of the mandibular nerve and also have clinical importance for desensitization of all the teeth in lower jaw [9].