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KMID : 0354619950070010021
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Journal Dankook Dental Research Institute
1995 Volume.7 No. 1 p.21 ~ p.30
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Experimental Study on the Change of TMJ following Unilateral Diskectomy in Dog
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Abstract
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The purpose of this studywas to observe changes of TMJ after unilateral diskectomy. 7 dogs of 12kg weight (control : 1, experimental · 6 ) were used. Left side of experimental group was diskectomized. The experimental animals were sacrified on 2,12, and 22 weeks, Bilateral excised TMJ were fixed in 10% neutral formalin, decalcified with 8% formic acid, and 4-8um paraffin sections were stained with Hematoxylin-Eosin staining antB Masson´s Trichrome staining. The specimens were examined with light microscope.
The results were as follows
1. Hyperplasia of articular zone and proliferating zone increased but hypertropic zone and erosive zone decreased in the non-surgicrl site. These features were assumed to mean adaptations of subchondral bone by change from chondral bone to bone.
2. Articular zone and hypertropiczone were increased but proliferating zone was decreased in surgical site of 22 weeks. It f·as assumed that stimulations in mandibular condyle accelerate shift from proliferating zone to hypertropic zone. Erosive zone was decreased a little.
3. Remodelling or subchondral bone was seen untit to 22weeks or surgical site, but barely seen in non-surgical site.
4. There were more active bone remodelling at the inner part of trabecules in both them surglcal and non-surgical site.
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KEYWORD
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