Location of the glenoid fossa after a period of unilateral masticatory function in young rabbits.
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 become 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).
Poikela
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A
Department of Oral Development and Orthodontics, Institute of Dentistry, University of Oulu, Finland.
Pirttiniemi
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P
Kantomaa
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T
D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D002508:Cephalometry; D003393:Cranial Sutures / Q000473:pathology; D005146:Facial Asymmetry / Q000473:pathology / Q000503:physiopathology; D005539:Foramen Magnum / Q000473:pathology; D005624:Frontal Bone / Q000473:pathology; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007180:Incisor / Q000473:pathology; D008310:Malocclusion / Q000473:pathology* / Q000503:physiopathology; D008335:Mandibular Condyle / Q000254:growth & development / Q000473:pathology; D008409:Mastication / Q000502:physiology*; D008963:Molar / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D015588:Observer Variation; D009777:Occipital Bone / Q000473:pathology; D010294:Parietal Bone / Q000473:pathology; D011817:Rabbits; D015203:Reproducibility of Results; D012886:Skull / Q000254:growth & development / Q000473:pathology; D013701:Temporal Bone / Q000254:growth & development / Q000473:pathology*; D014741:Video Recording / Q000295:instrumentation