In vitro evaluation of a removable partial denture framework using multi-directionally forged titanium
Suzuki Ginga, Shimizu Satoshi, Torii Mana, Tokue Ai, Ying Guo, Yoshinari Masao, Hoshi Noriyuki, Kimoto Katsuhiko, Miura Hiromi, Hayakawa Tohru, Ohkubo Chikahiro,
소속 상세정보
( Suzuki Ginga ) - Tsurumi University School of Dental Medicine Department of Removable Prosthodontics
( Shimizu Satoshi ) - Tsurumi University School of Dental Medicine Department of Removable Prosthodontics
( Torii Mana ) - Tsurumi University School of Dental Medicine Department of Removable Prosthodontics
( Tokue Ai ) - Tsurumi University School of Dental Medicine Department of Removable Prosthodontics
( Ying Guo ) - Capital Medical University Stomatological School Department of Prosthodontics
( Yoshinari Masao ) - Tsurumi University School of Dental Medicine Department of Dental Engineering
( Hoshi Noriyuki ) - Kanagawa Dental University Graduate School Prosthodontics and Oral Implantology
( Kimoto Katsuhiko ) - Kanagawa Dental University Graduate School Prosthodontics and Oral Implantology
( Miura Hiromi ) - Toyohashi University of Technology Department of Mechanical Engineering
( Hayakawa Tohru ) - Tsurumi University School of Dental Medicine Department of Dental Engineering
( Ohkubo Chikahiro ) - Tsurumi University School of Dental Medicine Department of Removable Prosthodontics
Abstract
PURPOSE: This study evaluated the availability of multi-directionally forged (MDF) titanium (Ti) as a component of removable partial dentures (RPDs). MDF-Ti remarkably improved the mechanical properties of RPDs due to its ultrafine-grained structure.
MATERIALS AND METHODS: The wear resistance, plaque adhesion, and machinability of MDF-Ti were tested. As controls, commercially pure (CP) titanium was used for wear, plaque adhesion, and machinability tests. For wear resistance, the volume losses of the titanium teeth before and after wear tests were evaluated. Plaque adhesion was evaluated by the assay of Streptococcus mutans. In the machinability test, samples were cut and ground by a steel fissure bur and carborundum (SiC) point. An unpaired t-test was employed for the analysis of the significant differences between MDF-Ti and the control in the results for each test.
RESULTS: Wear resistance and plaque adherence of MDF-Ti similar to those of CP-Ti (P>.05) were indicated. MDF-Ti exhibited significantly larger volume loss than CP-Ti in all conditions except 100/30,000 g/rpm in machinability tests (P<.05).
CONCLUSION: Although the wear resistance and plaque adherence of MDF-Ti were comparable to those of controls, MDF-Ti showed better machinability than did CP-Ti. MDF-Ti could be used as a framework material for RPDs.
키워드
Multi-directionally forged titanium (MDF-Ti); Wear resistance; Machinability; Removable partial dentures (RPDs)
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