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KMID : 0370819920070010125
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Yonsei Journal Dental Science
1992 Volume.7 No. 1 p.125 ~ p.147
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THE EFFECT OF POLYTETRAFLUOROETHYLENE MEMBRANE IN CONJUNCTION WITH REPLAMINEFORM HYDROXYAPATITE OR CALCIUM CARBONATE ON THE PERIODONTAL HEALING RESPONSES IN DOGS
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Abstract
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The ultimate goal of periodontal therapy is to fully reconstruct the periodontal attachment apparatus. Commonly used techniques for treatment of infrabony defects include a combination of root planing, currettage and grafting. To prevent the
apical
migration of epithelial cells, the technique of guided tissue regeneration is used.
The aim of this study is to evaluate the effects of polytetrafluoroethylene membrane in conjuction with porous replamineform hydroxyapatite or porous resorbable calcium carbonate in the periodontal therapy of dogs.
Experimental periodontitis was induced by the ligation of orthodontic elastic threads in the premolars and 1st molar of 6 adult dogs for 10 weeks.
@ES 3 types of regenerative procedures were performed as follows ;
@EN 1) flap operation with polytetrafluoroethylene membrane covering(control group) 2) flap operation with porous replamineform hydroxyapatite grafting and polytetrafluoroethylene membrane covering (experimental group I) 3) flap operation with
porous
resorbable calcium carbonate grafting and polytetrafluoroethylene membrane covering(experimental group II).
Thereafter, dogs were serially sacrificed at the 1, 3, 6, 12, 32 and 56 weeks, and the specimens were prepared, and stained with hematoxylin-eosin stain for the light microscopic evaluation.
@ES The results of this study were as follows ;
@EN 1. Junctional epithelium did not reach to the notch through the experimental period in the control and experimental group I and II.
2. in the aspects of the inflammatory cell infiltration, experimental group I and II showed severe aggregation than control group.
3. New cementum was observed over the notch from 3 weeks in experimental group II, but 6 weeks in control and experimental group I.
4. Periodontal tissue was healed with new periodontal ligament from 12 weeks in control group, but 32 weeks in experimental group I and II.
5. New bone was observed from 3 weeks in experimental group I and II, but 6 weeks in control group.
6. the smooth junction between new bone and implanted material was observed in experimental group I, but irregular junction in experimental group II.
7. In the aspects of the amount of new bone formation around implanted material, experimental group II was better than experimental group I.
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KEYWORD
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