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Failure rates of mini-implants placed in the infrazygomatic region
Flavio Uribe1, Rana Mehr2, Ajay Mathur3
1Division of Orthodontics, Department of Craniofacial Sciences, Charles Burstone Professor, University of Connecticut School of Dental Medicine, 263 Farmington Avenue, Farmington, CT, 06030, USA. Furibe@uchc.edu.
Background:
The purpose of this pilot study was to evaluate the failure rates of mini-implants placed in the infrazygomatic region and to evaluate factors that affect their stability.
Methods:
A retrospective cohort study of 30 consecutive patients (55 mini-implants) who had infrazygomatic mini-implants at a University Clinic were evaluated for failure rates. Patient, mini-implant, orthodontic, surgical, and mini-implant maintenance factors were evaluated by univariate logistic regression models for association to failure rates.
Results:
A 21.8 % failure rate of mini-implants placed in the infazygomatic region was observed. None of the predictor variables were significantly associated with higher or lower odds for failed implants.
Conclusions:
Failure rates for infrazygomatic mini-implants were slightly higher than those reported in other maxilla-mandibular osseous locations. No predictor variables were found to be associated to the failure rates.
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