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Journal of Dental Research
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*Joint Disorders
*Temporomandibular Joint Dysfunction
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Clinical

Unilateral Posterior Crossbite is Not Associated with TMJ Clicking in Young Adolescents

M. Farella1,*, A. Michelotti1, G. Iodice1, S. Milani2 and R. Martina1

1 School of Dentistry, Department of Oral, Dental and Maxillo-Facial Sciences, Section of Orthodontics and Clinical Gnathology, University of Naples "Federico II", Via Pansini, 5, I-80131, Naples, Italy; and
2 Institute of Medical Statistics and Biometry, University of Milan, Italy

Correspondence: * corresponding author, farella{at}unina.it

Unilateral posterior crossbite has been considered as a risk factor for temporomandibular joint clicking, with conflicting findings. The aim of this study was to investigate a possible association between unilateral posterior crossbite and temporomandibular disk displacement with reduction, by means of a survey carried out in young adolescents recruited from three schools. The sample included 1291 participants (708 males and 583 females) with a mean age of 12.3 yrs (range, 10.1–16.1 yrs), who underwent an orthodontic and functional examination performed by two independent examiners. Unilateral posterior crossbite was found in 157 participants (12.2%). Fifty-three participants (4.1%) were diagnosed as having disk displacement with reduction. Logistic regression analysis failed to reveal a significant association between unilateral posterior crossbite and disk displacement with reduction (odds ratio = 1.3; confidence limits = 0.6–2.9). Posterior unilateral crossbite does not appear to be a risk factor for temporomandibular joint clicking, at least in young adolescents.

Key Words: temporomandibular disorders • crossbite • malocclusion • cross-sectional study • young adolescents

Journal of Dental Research, Vol. 86, No. 2, 137-141 (2007)
DOI: 10.1177/154405910708600206
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