Structural equation modeling for alteration of occlusal plane inclination. Issue 3 (July 2015)

• Record Type: Journal Article
• Authors: Shigeta, Yuko; Ogawa, Takumi; Nakamura, Yoshiharu; Ando, Eriko; Hirabayashi, Rio; Ikawa, Tomoko
• Is Part Of: Journal of prosthodontic research. Volume 59:Issue 3(2015)
• Page Start: 185
• Page End: 193
• Publication Date: 2015-07
• Subjects: Occlusal plane -- Cephalometric image -- Camper-occlusal plane angle -- Aging -- Missing teeth; Prosthodontics -- Periodicals; Dentistry -- Periodicals; Prosthodontics -- Periodicals; Electronic journals; Computer network resources; 617.6905
• DOI: 10.1016/j.jpor.2015.05.001
• Languages: English
• ISSNs: 1883-1958

Abstract

Abstract: Purpose: Occlusal plane inclination is important to maintain a normal opening closing/biting function. However, there can be several causes that lead to alterations of the occlusal plane. The purpose of this study was to observe variations of occlusal plane inclination in adult patients, and to uncover the factors affecting changes in occlusal plane inclination with aging. Methods: Subjects were 143 patients. A cephalometric image was taken of these patients. In this study, our inquiry points were age, 3 variables on intra-oral findings, and 7 variables on cephalometric analysis. To evaluate the possible causes that affect occlusal plane inclination, factor analysis was carried out, and each component was treated as factors, which were then statistically applied to a structural equation model. Statistical analysis was carried out through the SPSS 20.0 (SPSS Inc., Chicago, USA). Results: In all patients, Camper-occlusal plane angle (COA) ranged from −25.7 to −4.9° (Mean ± SD: −6.4 ± 5.36). In the 60 patients who had no missing teeth, COA ranged from −11.6 to −4.9° (Mean ± SD: −3.3 ± 3.31). From the results of the structural analysis, it was suggested that the occlusal plane changes to counter-clockwise (on the right lateral cephalograms) with aging. Conclusion: In this study, variations of occlusal plane inclination in adult patients were observed, and the factors affecting changes in occlusal plane inclination with aging were investigated via factor analysis. From our results, it was suggested that the mandibular morphology change and loss of teeth with aging influence occlusal plane inclination.