[Anatomy of the atrophic mandible. 1. The location of the mandibular canal in the atrophic mandible].
43 atrophic left hemimandibles were divided by 6 saw cuts made between the mental foramen and the third molar to analyze the location of the mandibular canal. Mandibles were classified by the severity of alveolar absorption using Atwood's classification and changes in the distances of the mandibular canal from the superior and inferior borders of the mandibular body were correlated wit the degree of atrophy. Measurements were obtained with a digitizer and a computer and results were analyzed statistically. The following statistically significant observations were made: The distance of the mandibular canal to the external lingua and buccal cortical layers did not change with increasing atrophy, but remained remarkably constant. By contrast, highly significant changes in the distance of the mandibular body were found to be present. These were more pronounced at the superior than at the inferior border. The changes seen were consistently most severe at the level of the first molar. Prior to surgical interventions involving an atrophic mandible the location of the mandibular canal should invariably be identified by imaging techniques such as orthopantomography, telemetric X-rays, tomographies, CT and MRI, if indicated, in order to avoid injuries of the inferior alveloar nerve and preclude forensic consequences.
Ulm
C
C
Pechmann
U
U
Ertl
L
L
Gruber
H
H
Solar
P
P
Matejka
M
M
D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000473:pathology*; D001284:Atrophy; D001862:Bone Resorption / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology*; D008340:Mandibular Nerve / Q000473:pathology*; D008875:Middle Aged; D010027:Osteotomy; D061221:Trigeminal Nerve Injuries
Anatomische Untersuchungen an der atrophen Mandibula. Teil 1. Die Lage des Canalis mandibulae im atrophen Unterkiefer.