Saturday, September 08, 2012

American Journal of Orthodontics & Dentofacial Orthopedics Volume 142, Issue 3 , Pages 406-409, September 2012 Severe complication of a bonded mandibular lingual retainer

American Journal of Orthodontics & Dentofacial Orthopedics
Volume 142, Issue 3 , Pages 406-409, September 2012

Bonding a flexible spiral wire retainer to the lingual surfaces of all 6 anterior mandibular teeth is a commonly used type of retention. Complications are rare but can be serious enough to produce biologic damage. This article presents a serious complication of a lingual flexible spiral wire retainer. Four years after the orthodontic treatment, a 20-year-old man sought treatment for a broken flexible spiral wire retainer. The clinical examination showed about 35° of buccal root torque of that tooth. A cone-beam computed tomography image showed that the root and the apex of the tooth were almost completely out of the bone on its buccal side. Surprisingly, the tooth's vitality was preserved. The tooth was moved back, nearly to its original position; clinically, only a gingival recession remained. Orthodontists and dentists should be aware of possible complications of bonded retainers. Patients should be clearly informed how to detect problems at an early stage.

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