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Unexpected complications associated with mandibular fixed retainers: A retrospective study.

Josef Kučera¹, Ivo Marek²

¹Assistant professor, Department of Orthodontics, First Medical Faculty of Charles University, Prague, Czech Republic; postgraduate student, Department of Orthodontics, Clinic of Dental Medicine, Palacky University, Olomouc, Czech Republic.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics

|February 2, 2016

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Unexpected complications from mandibular fixed retainers are rare, with facial divergence a potential predictor. The exact causes are likely multifactorial, possibly involving retention wire properties.

Area of Science:

Orthodontics
Dental Materials Science

Background:

Mandibular fixed retainers are crucial for maintaining orthodontic treatment outcomes.
Unexpected complications can arise, impacting treatment success and patient satisfaction.

Purpose of the Study:

To identify and categorize unexpected complications associated with mandibular fixed retainers.
To determine the prevalence of these complications and explore potential etiologic factors.

Main Methods:

A retrospective study screened 3500 patients undergoing retention with mandibular fixed retainers.
Thirty-eight patients with unexpected complications were compared to 105 controls.
Cephalometric and clinical variables were analyzed for associations with complications.

Main Results:

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The most common complications were contralateral canine inclination (twist effect) and adjacent incisor torque differences (X effect).
Younger age at debonding, higher mandibular plane angles, and pretreatment incisor positions were associated with complications.
No significant differences were found in treatment duration, wire type, or failure rates.

Conclusions:

Unexpected complications of mandibular fixed retainers are infrequent.
Facial divergence may be a predictor, but etiology is likely multifactorial.
Further research into retention wire properties is warranted due to observed asymmetries.