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Evaluation of microbial attachment on different orthodontic brackets

Sudhanshu Kumar, Ravishankar Prasad, Atulya Prasad, Kunal Kumar, Gunjan Kedia, Neal Bharat Kedia


Background: Orthodontic brackets are available as different designs and materials in the market. These brackets are prone for bacterial plaque accumulation. The amount of plaque formation and friction is greatly affected depends on type of brackets. Aim: This study was done to assess microbial attachments on different brackets. Materials and Methods: This study includes 60 patients in age range of 18–25 years with both genders and ten samples in each subgroup. Six different types of commercially available brackets were used and divided into two groups. Group I comprised brackets 3M Unitek-Gemini (Subgroup I A), dentaurum equilibrium-2 (Subgroup I B), Ormco- Mini diamond (Subgroup I C) and Group II comprised brackets Orthox (Subgroup II A), Ocean (Subgroup II B) and Desire (Subgroup II C). Brackets were bonded in a polyurethane box. The dental plaque and saliva were added in brain heart infusion medium and brackets were incubated at 37°C. Colony-forming units (CFU) was recorded in each group. Results: The adhesion of aerobic bacteria to Group I brackets was higher in Subgroup I-C (26.92), followed by Subgroup I-B (20.46) and Subgroup I-A (15.24). The adhesion of aerobic bacteria to Group II brackets was higher in Subgroup II-C (61.15), followed by Subgroup I-B (49.36) and Subgroup I-A (42.94). The adhesion of anaerobic bacteria to Group I brackets was higher in Subgroup I-C (23.15), followed by Subgroup I-B (20.84) and Subgroup I-A (18.64). The adhesion of bacteria was statistically non-significant (P > 0.05). There was significant difference in adhesion of aerobes in Group I and Group II brackets (P < 0.05). There was significant difference in adhesion of anaerobes in Group I and Group II brackets (P < 0.05). Conclusion: There was difference in aerobes and anaerobes CFU in different types of brackets. 3M Unitek-Gemini (Group IA) and Orthox (Subgroup II A) were found to be better compared to other group and they have lesser amount of aerobic and anaerobic plaque accumulation. Clinical Significance: We found that, there was difference in aerobes and anaerobes CFU in different types of brackets. Titanium and gold brackets revealed the lowest microbial adhesion, which suggest their indication for clinical use to reduce plaque accumulation to improve oral hygiene during fixed orthodontic procedure.


Aerobes; attachment brackets; microbial; orthodontic brackets

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