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BMC Oral Health

, 16:112

Oral microbiology

Abstract

BackgroundMalocclusion is a common disease of oral and maxillofacial region. The study was aimed to investigate levels changes of periodontal pathogens in malocclusion patients before, during and after orthodontic treatments, and to confirm the difference between adults and children.

MethodOne hundred and eight malocclusion patients 46 adults and 62 children at the school-age were randomly selected and received orthodontic treatment with fixed orthodontic appliances. Subgingival plaques were Porphyromonas gingivalis P.gingivalis, Fusobacterium nucleatum F. nucleatum, Prevotella intermedia P. intermedia and Tannerella forsythensis T. forsythensis collected from the observed regions before and after treatment. Clinical indexes, including plaque index PLI, gingival index GI, sulcus bleeding index SBI, probing depth PD and attachment loss AL of observed teeth were examined.

ResultsThe detection rates of P.gingivalis, F. nucleatum, P. intermedia and T. forsythensis increased from baseline to the third month without significant difference, and then returned to pretreatment levels 12 month after applying fixed orthodontic appliances. Adults’ percentage contents of P.gingivalis, F. nucleatum, P. intermedia and T. forsythensis were significantly higher than those of children at baseline and the first month, but not obvious at the third month. PLI and SBI were increased from baseline to the first and to the third month both in adults and children groups. Besides, PD were increased from baseline to first month, followed by a downward trend in the third month; however, all patients were failed to detect with AL.

ConclusionsPeriodontal and microbiological statuses of malocclusion patients may be influenced by fixed orthodontic appliances in both adults and children, more significant in children than in adults. Some microbiological indexes have synchronous trend with the clinical indexes. Long-term efficacy of fixed orthodontic appliances for malocclusion should be confirmed by future researches.

KeywordsMalocclusion Orthodontic treatment Fixed orthodontic appliances Pathogens AbbreviationsALAttachment loss

F. nucleatumFusobacterium nucleatum

P. intermediaPrevotella intermedia

P.gingivalisPorphyromonas gingivalis

PDProbing depth

PLIPlaque index

real-time PCRReal-time polymerase chain reaction

SBISulcus bleeding index

T. forsythensisTannerella forsythensis

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Autor: Li Guo - Ying Feng - Hong-Gang Guo - Bo-Wen Liu - Yang Zhang

Fuente: https://link.springer.com/







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