[Clinical-controlled valuation of the conservative and surgical therapy by periodontitis marginalis].

The present investigation describes in a two years study the effect of conservative local therapy with and without surgical intervention and the reliability of the parameters (SLI, GI, SBI, pocket depth, attachment level and finally the microbiological examination (GRAM-technique). Reexamination was carried out in a recall system of 2, 4 and 12 weeks, also 6, 12 and 18 months after completing the determined therapy procedure. Analysis was carried out by means of the mean value, Student's t-test, correlation analysis and documenting the individual status respectively. Both treatment methods resulted in positive results. Individual variations among patients were noted. Deep pockets were initially more reduced by surgical intervention than by conservative local treatment alone. Principally, surgical intervention shows as a result more sites surfaces with progression of periodontitis than after conservative local treatment. Attachment loss is the most correct sign of periodontal progression. Decisions for surgical intervention should be based on follow-up documentation and individual patient reactions.