Does Rigid Bracing Arm Harm the Abutment Tooth of Removable Partial Denture?

• Project/Area Number: 21592459
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: Nagasaki University
• Principal Investigator: YAMABE Yoshihisa 長崎大学, 大学院・医歯薬学総合研究科, 教授 (90191379)
• Co-Investigator(Kenkyū-buntansha): IKOMA Akiko 長崎大学, 大学院・医歯薬学総合研究科, 助教 (80420628) ; TORISU Tetsurou 長崎大学, 病院, 講師 (80264258) ; YAMASHITA Rika 長崎大学, 病院, 助教 (50336179)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 可撤性義歯 / 支台装置 / 歯学 / 臨床

Research Abstract

The influences of the retainer of the free end saddle partial denture to the abutment tooth were examined. When the distal rest was applied with bracing arm, it led to increase of the horizontal pressure to the abutment tooth. But the bracing arm in combination with mesial rest led the abutment tooth pressure to the tooth axis direction, and the horizontal direction pressure was reduced. It was suggested that the pressure of the denture abutment tooth tends to be affected by the position of the rest and the degree ofbracing action.