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Abstract

Objective: To find out the frequency of bracket bond failure in patients with normal overbite and deep bite.Methodology: Sample consisted of 100 patients undergoing fixed orthodontic treatment at Orthodontic Department of RawalInstitute of Health Sciences, Islamabad between July 2014 and June 2016. Patients were divided into 2 equal groups. 50 patientswere with normal overbite (0-2mm) and 50 patients were with deep bite(>2mm). All patients were bonded with metal bracketsand were kept under observation for 12 months for bracket bond failure. SPSS 21 was used for statistical analysis.P-value<0.05was considered statistically significant.Results: 43 patients showed bracket bond failure. 76 % patients with deep bite, while 10 % patients with normal overbiteshowed bracket bond failure (p-value <0.05). Female patients showed more bracket bond failure (43.9 %) than male subjects(41.2 %). Bracket bond failure in maxillary arch was 69.8 %, whereas it was30.2 % in mandibular arch. Bracket breakage wasseen in buccal segment in 53.5 % of cases, while incidence was 46.5%in labial segment.Conclusion: Bracket bond failure was more common in patients with deep bite. Female patients showed greater incidence andmost common location was buccal segment in maxillary arch. Most frequent tooth with bracket bond failure was second premolar.