An evaluation of intraoral molar distalization with nickel-titanium coil springs

The purpose of this study was to determine dental and skeletal effects of compressed nickel-titanium coil springs used for distal movement of the maxillary molars. Initial and follow-up cephalometric radiographs were taken of 8 patients (2 males and 6 females) in the late mixed or permanent dentitio...

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Published inQuintessence international (Berlin, Germany : 1985) Vol. 36; no. 9; p. 731
Main Authors Oztürk, Yildiz, Firatli, Sonmez, Almaç, Levent
Format Journal Article
LanguageEnglish
Published Germany 01.10.2005
Subjects
Cephalometry
Child
Female
Humans
Male
Malocclusion, Angle Class II - therapy
Molar
Nickel
Orthodontic Appliances
Titanium
Tooth Movement Techniques - instrumentation
Tooth Movement Techniques - methods
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Summary:The purpose of this study was to determine dental and skeletal effects of compressed nickel-titanium coil springs used for distal movement of the maxillary molars. Initial and follow-up cephalometric radiographs were taken of 8 patients (2 males and 6 females) in the late mixed or permanent dentition stage with Class II malocclusion. Nickel-titanium coil springs exerting a near constant force of approximately 250 g were compressed against the maxillary molar tubes by Gurin locks. The mean treatment time was 6.95 +/- 0.2 months. Dental and skeletal changes were determined as follows: The mean maxillary first molar distalization was 5.44 mm (right) and 3.75 mm (left), with a mesial tipping of 11.56 degrees (right) and 11.34 degrees (left). Anchorage loss occurred as defined by mesial movement of the first premolars and proclination of the central incisors. Vertical dental and skeletal dimensions were not affected.
ISSN:0033-6572