Effect of mandibular lateral displacement on morphology of condyle and mandible in growing rats
- VernacularTitle:成长期大鼠下颌侧方偏位对髁突及下颌骨形态的影响
- Author:
Chang LIU
;
Jinrui WANG
;
Qingshan LI
- Publication Type:Journal Article
- Keywords:
condylar cartilage;
mandible;
lateral displacement;
morphology
- From:
Journal of Jilin University(Medicine Edition)
2006;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To elucidate the relationship between mandibular lateral displacement and mandible asymmetry by observing the morphological changes of condylar head and mandible during mandibular lateral displacement in growing rats.Methods Forty-eight male Wistar rats at the age of four weeks were divided at random into experimental and control groups,with 24 rats in each group.A super-hard resin plate was cemented to upper incisors to displace rat mandibles 2 mm to the left during closure(Ipsilateral side).A metal crown was fitted to lower incisors.The rats were killed 2,4,8 or 12 weeks after appliance attachment.The mandible was dissected out and halved.The length and width of condylar head were measured with a caliper.Radiographic films of the mandibles were exposed,and selected measurements were made.Results The length of condylar cartilage on the ipsilateral side was significantly larger than contralateral side in experimental group(P
