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《Journal of Harbin Medical University》 2002-01
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Effect of experimental traumatic occlusion on periapical lesions in rats

ZHANG Li,LIU Wen zhu,LIU Ying qun, et al (Department of Pediatric Dentistry,College of Stomatology,Harbin Medical University,Harbin 150001,China)  
Objective To study the effect of experimental unilateral traumatic occlusion on the periapical lesions after pulpal exposure in rats.Methods Sixty Wistar rats were divided equally into group A to D.Rats in group A received no treatment;Rats in group B received experimental periapical periodontitis;Experimental traumatic occlusion was given to rats in group C and rats in group D received treatments of both B and C.On the first,second,fourth day after experiment killed some rats respectively and investigated their histological and histometrical changes.Results ①In group B we found serious pulpitis and the resorption of the alveolar bone.②Group C rats appeared the compression of the periapical ligament and the alveolar bone resorpsion.③The compression of the periapical ligament was more in group D than in group B,but we found that the inflammation of the periapical lesions was less in group D than in group B.Conclusion Traumatic occlusion delay the enlargement of the experimental periapical lesions.
【CateGory Index】: R781.34
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