Background: Malocclusion is a common disease of oral and maxillofacial region. The study was aimed to\ninvestigate levels changes of periodontal pathogens in malocclusion patients before, during and after orthodontic\ntreatments, and to confirm the difference between adults and children.\nMethod: One hundred and eight malocclusion patients (46 adults and 62 children at the school-age) were\nrandomly selected and received orthodontic treatment with fixed orthodontic appliances. Subgingival plaques were\nPorphyromonas gingivalis (P.gingivalis), Fusobacterium nucleatum (F. nucleatum), Prevotella intermedia (P. intermedia)\nand Tannerella forsythensis (T. forsythensis) collected from the observed regions before and after treatment. Clinical\nindexes, including plaque index (PLI), gingival index (GI), sulcus bleeding index (SBI), probing depth (PD) and\nattachment loss (AL) of observed teeth were examined.\nResults: The detection rates of P.gingivalis, F. nucleatum, P. intermedia and T. forsythensis increased from baseline to\nthe third month without significant difference, and then returned to pretreatment levels 12 month after applying\nfixed orthodontic appliances. Adults� percentage contents of P.gingivalis, F. nucleatum, P. intermedia and T.\nforsythensis were significantly higher than those of children at baseline and the first month, but not obvious at the\nthird month. PLI and SBI were increased from baseline to the first and to the third month both in adults and\nchildren groups. Besides, PD were increased from baseline to first month, followed by a downward trend in the\nthird month; however, all patients were failed to detect with AL.\nConclusions: Periodontal and microbiological statuses of malocclusion patients may be influenced by fixed\northodontic appliances in both adults and children, more significant in children than in adults. Some\nmicrobiological indexes have synchronous trend with the clinical indexes. Long-term efficacy of fixed orthodontic\nappliances for malocclusion should be confirmed by future researches.
Loading....