22 patients divided into 3 groups, all lesions were around first molars and central incisors. Juvenile periodontitis group (n=8), post-juvenile periodontitis group (n=7), and a control group of adult periodontitis (n=8).
An important conclusion from this study was that the subgingival microflora in juvenile periodontitis is different from that of adult periodontitis. (in juvenile periodontitis and in post-juvenile periodontitis, the subgingival plaque samples were dominated by motile organisms and in adult periodontitis, coccoids and straight non-motile rods dominated.)
Plaque samples were taken with a curette as described by Listgarten and Hellden, 1978. These were examined using darkfield microscopy for motility and cell morphology. Tissue was excised immediately after bacterial sampling and these were the fixed.
In juvenile periodontitis, 70% of the volume of the infiltrated connective tissue was made up of plasma cells and blast cells.
In post-juvenile periodontitis and adult periodontitis, collagen and residual tissue made up around 50% of infiltrate. (vs. extracellular structures occupying 20% of the volume in the juvenile periodontitis cases)
Following sampling of plaque and biopsy, the juvenile periodontitis and the post-juvenile periodontitis cases were treated by tetracycline (250 mg QID x 2 weeks) and by surgical elimination of granulation tissue via a modified Widman flap technique, and periodic recall. the adult periodontitis cases were given treatment as described by Lindhe and Nyman (1975) which did not include antibiotics.
It was noted that during surgery, the exposed roots of the juvenile periodontitis patients harbored little calculus, whereas the other groups consistently harbored aggregates of calculus. No follow-up results for treatment was given in this article.
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