Journal Article

Location of the glenoid fossa after a period of unilateral masticatory function in young rabbits

A Poikela, P Pirttiniemi and T Kantomaa

in The European Journal of Orthodontics

Published on behalf of European Orthodontic Society

Volume 22, issue 2, pages 105-112
Published in print April 2000 | ISSN: 0141-5387
Published online April 2000 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/22.2.105
Location of the glenoid fossa after a period of unilateral masticatory function in young rabbits

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Changes in glenoid fossa position and skull morphology after a period of unilateral masticatory function were studied. The right-side maxillary and mandibular molars in twenty-seven 10-day-old rabbits were ground down under general anaesthesia. The procedure was repeated twice a week, until the rabbits were 50 days old. Fourteen rabbits were then killed and 13 left to grow to age 100 days. Nine 50-day-old and sixteen 100-day-old rabbits with unmodified occlusions served as controls. Three-dimensional measurements were made using a machine-vision technique and a video-imaging camera.

The glenoid fossa position became more anterior in both groups of animals subjected to molar grinding as compared with controls (P<0.01 in the 50-day-old group and P<0.05 in 100-day-old group). In the 100-day-old group the right-side fossa was also in a more inferior position (P<0.01). The glenoid fossa was more anteriorly located on the right than on the left side of individual animals in the group in which the right-side molars had been ground down (P<0.001).

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Subjects: Restorative Dentistry and Orthodontics

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