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-75-Dental Prescales50H4037 Can Removable Partial Denture Reduce Force to Maxillary Anterior Teeth?Poster Presentation3:45 PM–5:00 PM Mar 25, 2017CC, First Floor Authors:Authors:TomoyaGonda(Presenter)Osaka University Graduate School of DentistryHitomiTogawa, Osaka University Graduate School of DentistryToshihitoTakahashi, Osaka University Graduate School of DentistryYozoFujinami, Osaka University Graduate School of DentistryYu-ichiNishimura, Osaka University Graduate School of DentistryYoshinobuMaeda, Osaka University Graduate School of DentistryAbstract: Objectives: After losing teeth, remaining teeth received more load and then subsequent tooth loss is expected. Our previous research in the model study showed that occlusalload to maxillary anterior teeth increased when distal extension missing area expanded. The purpose of this research is to compare the occlusalforce to maxillary anterior teeth with and without removable partial dental prosthesis in the volunteer patients' mouth.Methods: Eight volunteer patients who received bilateral distal extension removable partial dental prosthesis in Osaka University Dental Hospital and had been using it more than a month agreed prosthesis in Osaka University Dental Hospital and had been using it more than a month agreed to join this study. Occlusalforce was measured under maximal occlusalforce for three seconds by using occlusalforce measuring sheet (Dental Prescale50H, GC Tokyo, Japan) Measurement was done three times and occlusalforce on every teeth was recorded. Ratio of occlusalforce of anterior teeth in that of all teeth was calculated and compared between with and without the prosthesis. Wilcoxonsigned-rank test was used to compare the ratio between with and without the prosthesis. This study was approved by the Ethics Committee at Osaka University Graduate School of Dentistry (H27-E7). We state no completing interest related to this research.Results: Load ratio of maxillary anterior teeth was 11 to 100 % without removable dental prosthesis and 0 to 74% with prosthesis. The load ratio with prosthesis was significantly smaller than that without it. This result is same tendency with the result of our previous research on the model.Conclusions: Wearing removable partial dental prosthesis can reduce load to maxillary anterior teeth and this suggested that it can avoid subsequent tooth loss for the patients.Disclosure Statement:The submitter must disclose the names of the organizations with which any author have a The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONEI have read the IADR policy on licensing.Signed by TomoyaGondaReprinted with permission from the Journal of Dental Research, J Dent Res 96 (Spec Iss A):-75-abstract number 4037, https://iadr2017.zerista.com/event/member/332312, 2017