Trauma and progression of marginal periodontitis in squirrel monkeys. IV Reversibility of bone loss due to trauma alone and trauma superimposed upon periodontitis

Polson, A.M.; Meitner, S.W.; Zander, H.A.

Journal of Periodontal Research 11(5): 290-298


ISSN/ISBN: 0022-3484
PMID: 133236
DOI: 10.1111/j.1600-0765.1976.tb00083.x
Accession: 068521515

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Repeated trauma to the interproximal periodontium induced by jiggling of teeth has resulted in alveolar bone loss and, when combined with periodontitis, increased the amount of bone loss compared with periodontitis alone. The reversibility of such bone loss was studied. Squirrel monkeys (8) were divided into 2 equal groups. In 4 animals, the mandibular 2nd and 3rd bicuspids were jiggled mesio-distally for 10 wk. On 1 side a marginal periodontitis was induced at the same time. In the other 4 animals the same procedures were instituted except these animals were killed 10 wk after jiggling had been stopped. Step-serial histologial sections of the coronal interproximal area were analyzed. Loss in height of alveolar bone and percentage of bone occupying the coronal area were measured histometrically. When jiggling was stopped, a significant reversibility of bone loss occurred. No such reversal was seen in the presence of periodontitis. Presence of an existing marginal inflammation possibly inhibited the potential for bone regeneration.