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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24394

Title: The effect of headgear on upper third molars: a retrospective longitudinal study
Authors: Miclotte, Annelie
Grommen, Bieke
Lauwereins, Steven
de Llano-Perula, Maria Cadenas
Alqerban, Ali
Verdonck, Anna
Fieuws, Steffen
Jacobs, Reinhilde
Willems, Guy
Issue Date: 2017
Publisher: OXFORD UNIV PRESS
Citation: EUROPEAN JOURNAL OF ORTHODONTICS, 39(4), p. 426-432
Abstract: Objectives: To investigate the effects of orthodontic non-extraction treatment with or without headgear on the position of and the space available for upper third molars in growing children with class II malocclusions. Materials and methods: The sample consisted of pre- and post-treatment panoramic radiographs and lateral cephalograms of 294 class II orthodontic patients; 160 were treated with headgear and 134 were treated without headgear. The space available for the upper third molar was measured on the lateral cephalogram as the distance from pterygoid vertical (PTV) to the distal surface of the upper first molar crown (PTV-M1). Angulation, vertical position and tooth development stage of the upper third molars were evaluated on panoramic radiographs. All measurements were evaluated statistically. Results: In both groups PTV-M1 increased, but the increase in PTV-M1 was significantly higher for patients treated without headgear. A linear model for repeated measures revealed that this difference was still significant after correction for age, gender and molar occlusion. Further, there is no evidence that the change in angulation, vertical position and development stage of the upper third molars during orthodontic treatment is influenced by headgear therapy. Conclusion: This study indicates that the use of headgear in growing patients significantly affects the space available for upper third molars. However, orthodontic treatment with headgear does not influence the angulation, vertical position and development stage of upper third molars. It is therefore important to always take into account third molars during treatment planning.
Notes: [Miclotte, Annelie; de Llano-Perula, Maria Cadenas; Verdonck, Anna; Willems, Guy] Katholieke Univ Leuven, Dept Oral Hlth Sci Orthodont, Kapucijnenvoer 7, B-3000 Leuven, Belgium. [Miclotte, Annelie; de Llano-Perula, Maria Cadenas; Verdonck, Anna; Willems, Guy] Univ Hosp Leuven, Dent, Leuven, Belgium. [Grommen, Bieke; Jacobs, Reinhilde] Univ Leuven, Fac Med, Dept Imaging & Pathol, OMFS IMPATH, Leuven, Belgium. [Grommen, Bieke; Jacobs, Reinhilde] Univ Hosp Leuven, Maxillofacial Surg, Leuven, Belgium. [Lauwereins, Steven] Katholieke Univ Leuven, Dept Elect Engn, Leuven, Belgium. [Alqerban, Ali] Prince Sattam Bin Abdulaziz Univ, Coll Dent, Dept Prevent Dent Sci, Al Kharj, Saudi Arabia. [Fieuws, Steffen] Katholieke Univ Leuven, Interuniv Inst Biostat & Stat Bioinformat, Leuven, Belgium. [Fieuws, Steffen] Univ Hasselt, Hasselt, Belgium.
URI: http://hdl.handle.net/1942/24394
DOI: 10.1093/ejo/cjw090
ISI #: 000407226400012
ISSN: 0141-5387
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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