Department of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
Int J Prosthodont. 2012 Nov-Dec;25(6):619-21.
The purpose of this preliminary investigation was to assess the influence of palatal morphology on deformation of maxillary complete dentures in vivo. The palatal morphology of the maxillae of eight edentulous subjects was measured. Experimental dentures were fabricated, and a strain gauge was attached at the first molar position at the midline of the polished surface of each denture. Subjects were instructed to bite a metal bar placed bilaterally at the denture's first molar region with a force of 49 N. The resultant strains were recorded, and the correlation between strain and palatal morphology was evaluated using the Pearson correlation coefficient. A strong correlation between strain and both palatal depth and radius of curvature was noted, suggesting that edentulous patients with wide, shallow palates have a higher risk of denture deformation, which may lead to material fracture.
本初步研究旨在评估腭形态对上颌全口义齿在体变形的影响。测量了 8 名无牙颌患者上颌的腭形态。制作了实验性义齿，并在每个义齿抛光表面中线的第一磨牙位置处附着应变片。嘱患者用 49N 的力双侧咬住位于义齿第一磨牙区域的金属棒。记录所得应变，并使用 Pearson 相关系数评估应变与腭形态之间的相关性。应变与腭深度和曲率半径之间存在很强的相关性，这表明腭宽而浅的无牙颌患者有更高的义齿变形风险，这可能导致材料断裂。
