The study of new stress breaking magnet attachment for implant-overdenture

2015 Fiscal Year Final Research Report

• Project/Area Number: 25463038
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Tsurumi University
• Principal Investigator: OSADA Tomoko 鶴見大学, 歯学部, 非常勤講師 (70460178)
• Co-Investigator(Kenkyū-buntansha): OHKUBO Chikahiro 鶴見大学, 歯学部, 教授 (10223760) ; KOKUBO Yuji 鶴見大学, 歯学部, 学内教授 (20225410) ; SUZUKI Yasunori 鶴見大学, 歯学部, 講師 (70257335)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: インプラント / アタッチメント / マグネット / オーバーデンチャー

Outline of Final Research Achievements

This study evaluated the retentive forces and displacement of stress-breaking attachments after repeated loads.Seven types of stress-breaking attachmentswere placed on the implants. To simulate the chewing cycles, a load of 5 kgf was repeatedly applied up to 50,000 using a loading apparatus. The retentive force was measured by tensile test. The vertical displacement of each female was measured under 5 kgf. These measurements were repeated for 10,000 cycles. The mean values were analyzed using 1-way ANOVA followed by the Tukey’s test at a significance level of α=0.05.There were no significant differences of the retentive forces of both magnet and SBM attachments before and after loading (p>0.05).The vertical displacement of the magnet and SBM attachments showed a slight decrease after loading. On other hand, Locator attachment had no vertical displacement, and cushion type magnet attachment showed significant decrease (p>0.05).

Free Research Field

有床義歯補綴学