Upper molar intrusion in rehabilitation patients with the aid of microscrews

Department of Orthodontics, Latin American Institute of Dentistry Research and Education, Curitiba, PR, Brazil.
Australian orthodontic journal (Impact Factor: 0.43). 05/2008; 24(1):50-3.
Source: PubMed


Overeruption of an upper molar following loss of the opposing tooth is a common clinical finding. Rehabilitation can be difficult when the interocclusal space is reduced.
To intrude an overerupted upper first molar and replace the missing lower first molar.
Buccal and palatal microscrews and a transpalatal bar were placed. The palatal miniscrew loosened shortly after implantation and was not replaced. A short length of elastomeric chain from the buccal miniscrew applied 30 g of force to the overerupted molar. The elastomeric chain was replaced every four weeks.
Sufficient intrusion of the upper molar was obtained in 4 months.
A single buccal microscrew and transpalatal arch can be used to intrude an overerupted upper molar.

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