Study the effect of a fixed orthodontic appliance on the oral microbial cavity

Medical Journal of Babylon

article

Asaad Kareem Al-nafaee¹  Rasha Jasim Al-warid¹  Kasem Ahmed Abeas¹ 

[1] Department of Microbiology, College of Dentistry, University of Babylon

关键词: Bacteria;    fixed orthodontic appliance;    MSB agar;    Streptococcus mutans;   

DOI  :  10.4103/MJBL.MJBL_339_22

学科分类：社会科学、人文和艺术（综合）

来源: Wolters Kluwer Medknow Publications

【 摘 要 】

Background: Orthodontics is that branch of dentistry specialty dealing with diagnosis, prevention, and correction of malocclusion aiming to enhance oral health, dental function, and esthetics. The presence of a fixed orthodontic appliance within the oral cavity can alter the microbial balance and so the composition of dental plaque. However, the presence of a fixed appliance alters the physiological characteristics of the oral cavity, causing impaired hygiene, a raise in dental plaque collection, and a delay in the spontaneous physiological processes of tooth cleaning that result in pathogenic bacteria colonization, which causes gingival inflammation, periodontal support degradation, and enamel surface alterations. Objective: The study’s objectives were isolated, identification, and molecular detection of microbes associated with orthodontic appliance patients. Materials and Methods: A total of 88 study samples (68 case; 20 control), 29 males and 59 females, aged 14–35 years, underwent fixed orthodontics during the initial stage of treatment. The samples were cultured on enrichment media and selective media, including mitis-salivarius agar, Mitis-Salivarius Bacitracin agar, Lactobacillus MRS agar, Eosin Methylene Blue agar, and Mannitol agar. They cultured in aerobic and anaerobic (10% CO 2 ) conditions. Results: The positive samples were then purified and identified using morphological and biochemical tests. Among the microbial species gram-positive bacteria accounted for 82.3%, gram-negative bacteria 16.2%, and fungi 1.5%. Our results show that on one hand, gram-positive bacteria, Streptococcus mutans make higher percentage (48.5%) compared to other types. On the other hand, the Escherichia coli with 11.7% is the highest percentage of gram-negative bacteria. Conclusion: Bacteria colonization of orthodontic patients was found to be remarkably high compared to that of controls. Finally, the most common bacteria are S. mutans identify using PCR utilizing Sm.479.F/R primer combination.

【 授权许可】

CC BY-NC-SA