The relationship between maximum lip closing force and tongue pressure according to lateral craniofacial morphology. Issue 3 (September 2015)

• Record Type: Journal Article
• Authors: Doto, Naosuke; Yamada, Kazuhiro
• Is Part Of: Orthodontic waves. Volume 74:Issue 3(2015:Sep.)
• Page Start: 69
• Page End: 75
• Publication Date: 2015-09
• Subjects: Orthodontics -- Periodicals; Orthodontics -- Periodicals; Orthodontie -- Périodiques; Orthodontie; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 617.643
• DOI: 10.1016/j.odw.2015.02.004
• Languages: English
• ISSNs: 1344-0241

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <title id="sect0010">Purpose</title> <p id="spar0005">The objectives of this study were to quantitatively evaluate the relationships between maximum lip closing force (LCF) or maximum tongue pressure (TP) and lateral craniofacial morphology.</p> </sec> <sec> <title id="sect0015">Subjects and methods</title> <p id="spar0010">The subjects comprised 62 female adult patients with malocclusion (mean age: 26.4 ± 7.7 years) without a history of orthodontic treatment, who were randomly selected from among the orthodontic patients at our hospital, and 10 adult female volunteers who exhibited normal occlusion (mean age: 24.4 ± 2.5 years). The patients were divided into three groups: the skeletal Class I, II, and III groups. Maximum LCF was measured with the LCF measuring device, and maximum TP was measured with the modified LCF measuring device.</p> </sec> <sec> <title id="sect0020">Results</title> <p id="spar0015">The maximum LCF of the skeletal Class II patients was significantly weaker than those of the skeletal Class III patients and the subjects with normal occlusion. However, no significant differences in maximum TP or the maximum LCF/maximum TP balance index were detected among the four groups.</p> <p id="spar0020">Maximum LCF exhibited significant positive correlations with SNB, FMIA, and the interincisal angle and significant negative correlations with ANB, IMPA, and overjet. The maximum LCF/maximum TP balance index demonstrated significant positive correlations with SNB and the interincisal angle and significant negative correlations with ANB and overjet.</p> </sec> <sec> <title id="sect0025">Conclusion</title> <p id="spar0025">These results suggested that LCF is more closely involved than TP in compensatory inclination of the lower anterior teeth due to differences in the anteroposterior positions of the upper and lower jaws.</p> </sec> </abstract>