A Newly Proposed Method to Predict Optimum Occlusal Vertical Dimension

作者：Yamashita Shuichiro^*; Shimizu Mariko; Katada Hidenori

来源：Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry, 2015, 24(4): 287-290.

DOI：10.1111/jopr.12223

• occlusal vertical dimension
• lower facial height
• cephalometric analysis
• multiple linear regression analysis
• prediction formula

PurposeEstablishing the optimum occlusal vertical dimension (OVD) in prosthetic treatment is an important clinical procedure. No methods are considered to be scientifically accurate in determining the reduced OVD in patients with missing posterior teeth. The purpose of this study was to derive a new formula to predict the lower facial height (LFH) using cephalometric analysis.
Materials and MethodsFifty-eight lateral cephalometric radiographs of Japanese clinical residents (mean age, 28.6 years) with complete natural dentition were used for this study. Conventional skeletal landmarks were traced. Not only the LFH, but six angular parameters and four linear parameters, which did not vary with reduced OVD, were selected. Multiple linear regression analysis with a stepwise forward approach was used to develop a prediction formula for the LFH using other measured parameters as independent variables.
ResultsThe LFH was significantly correlated with Gonial angle, SNA, N-S, Go-Me, Nasal floor to FH, Nasal floor to SN, and FH to SN. By stepwise multiple linear regression analysis, the following formula was obtained: LFH (degree) = 65.38 + 0.30* (Gonial angle; degree) - 0.49* (SNA; degree) - 0.41* (N-S; mm) + 0.21* (Go-Me; mm) - 15.45* (Nasal floor to FH; degree) + 15.22* (Nasal floor to SN; degree) - 15.40* (FH to SN; degree).
ConclusionsWithin the limitations of this study for one racial group, our prediction formula is valid in every LFH range (37 to 59 degrees), and it may also be applicable to patients in whom the LFH deviated greatly from the average.

• 出版日期2015-6