Читать книгу Periodontics - Fernando Suarez - Страница 70

Groups of bacteria with specific characteristics have been shown to be implicated as primary etiologic factors in the pathogenesis of periodontal diseases. The classic 1998 study by Socransky et al,⁴⁰ among others, investigated this association and identified specific bacterial complexes to be associated with increased PDs.

The qualitative and quantitative differences in the microflora of periodontitis and nonperiodontitis patients was also evidenced in a study by Listgarten and Hellden⁴¹ in 1978. A significant increase in motile rods and a decrease in coccoid cells was observed in diseased sites (PD > 5 mm) compared with healthy sites.⁴¹ See chapter 3 for further considerations.