Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An in vitro experimental and finite element analysis
To evaluate the fracture resistance of computer-aided design and computer-assisted manufacturing restorations as the abutment of removable partial dentures, experimental blocks, with the rest seat made of feldspar, hybrid resin composite, lithium disilicate glass ceramic, or zirconia, were subjected...
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| Veröffentlicht in: | Dental Materials Journal 2022/05/25, Vol.41(3), pp.466-472 |
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| creator | UCHIKURA, Keiichiro MURAKAMI, Natsuko YAMAZAKI, Toshiki LYU, Huaxin NAGATA, Kohji ONA, Masahiro IWASAKI, Naohiko TAKAHASHI, Hidekazu WAKABAYASHI, Noriyuki |
| description | To evaluate the fracture resistance of computer-aided design and computer-assisted manufacturing restorations as the abutment of removable partial dentures, experimental blocks, with the rest seat made of feldspar, hybrid resin composite, lithium disilicate glass ceramic, or zirconia, were subjected to loading by a metallic occlusal rest. The rest contacted the rest seat with an accurate fit and two mismatch contact conditions: bottom and sidewall contact. Zirconia exhibited the highest fracture load, and the fracture load of the accurate fit was significantly higher than that of the sidewall contact (p0.05). A finite element analysis of the sidewall contact revealed a higher tensile stress concentration at the bottom of the rest seat than the other contact conditions. The mismatch between the rest and the restoration reduced fracture resistance, while zirconia as the abutment withstood the average occlusal force of the posterior region. |
| doi_str_mv | 10.4012/dmj.2021-224 |
| format | Article |
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The rest contacted the rest seat with an accurate fit and two mismatch contact conditions: bottom and sidewall contact. Zirconia exhibited the highest fracture load, and the fracture load of the accurate fit was significantly higher than that of the sidewall contact (p<0.05) and insignificantly higher than that of the bottom contact (p>0.05). A finite element analysis of the sidewall contact revealed a higher tensile stress concentration at the bottom of the rest seat than the other contact conditions. The mismatch between the rest and the restoration reduced fracture resistance, while zirconia as the abutment withstood the average occlusal force of the posterior region.</description><identifier>ISSN: 0287-4547</identifier><identifier>EISSN: 1881-1361</identifier><identifier>DOI: 10.4012/dmj.2021-224</identifier><identifier>PMID: 35249901</identifier><language>eng</language><publisher>Japan: The Japanese Society for Dental Materials and Devices</publisher><subject>CAD ; CAD/CAM ; CAM ; Ceramics ; Composite materials ; Computer aided design ; Computer aided manufacturing ; Contact stresses ; Dental Materials ; Dental Porcelain ; Dental Restoration Failure ; Dental Stress Analysis ; Denture, Partial, Removable ; Dentures ; FEM ; Finite Element Analysis ; Finite element method ; Fracture load ; Fracture toughness ; Glass ceramics ; Lithium ; Materials Testing ; Prostheses ; Removable partial denture ; Rest ; Rest seat ; Stress concentration ; Tensile stress ; Zirconia ; Zirconium dioxide</subject><ispartof>Dental Materials Journal, 2022/05/25, Vol.41(3), pp.466-472</ispartof><rights>2022 The Japanese Society for Dental Materials and Devices</rights><rights>Copyright Japan Science and Technology Agency 2022</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c711t-ed3ce09bf3765606d242de61aca70e36aeda021f189d48c164697a05df737b183</citedby><cites>FETCH-LOGICAL-c711t-ed3ce09bf3765606d242de61aca70e36aeda021f189d48c164697a05df737b183</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1883,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35249901$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>UCHIKURA, Keiichiro</creatorcontrib><creatorcontrib>MURAKAMI, Natsuko</creatorcontrib><creatorcontrib>YAMAZAKI, Toshiki</creatorcontrib><creatorcontrib>LYU, Huaxin</creatorcontrib><creatorcontrib>NAGATA, Kohji</creatorcontrib><creatorcontrib>ONA, Masahiro</creatorcontrib><creatorcontrib>IWASAKI, Naohiko</creatorcontrib><creatorcontrib>TAKAHASHI, Hidekazu</creatorcontrib><creatorcontrib>WAKABAYASHI, Noriyuki</creatorcontrib><creatorcontrib>Advanced Prosthodontics</creatorcontrib><creatorcontrib>Oral Health Engineering</creatorcontrib><creatorcontrib>Oral Health Sciences</creatorcontrib><creatorcontrib>Tokyo Medical and Dental University</creatorcontrib><creatorcontrib>Graduate School of Medical and Dental Sciences</creatorcontrib><title>Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An in vitro experimental and finite element analysis</title><title>Dental Materials Journal</title><addtitle>Dent. Mater. J.</addtitle><description>To evaluate the fracture resistance of computer-aided design and computer-assisted manufacturing restorations as the abutment of removable partial dentures, experimental blocks, with the rest seat made of feldspar, hybrid resin composite, lithium disilicate glass ceramic, or zirconia, were subjected to loading by a metallic occlusal rest. The rest contacted the rest seat with an accurate fit and two mismatch contact conditions: bottom and sidewall contact. Zirconia exhibited the highest fracture load, and the fracture load of the accurate fit was significantly higher than that of the sidewall contact (p<0.05) and insignificantly higher than that of the bottom contact (p>0.05). A finite element analysis of the sidewall contact revealed a higher tensile stress concentration at the bottom of the rest seat than the other contact conditions. The mismatch between the rest and the restoration reduced fracture resistance, while zirconia as the abutment withstood the average occlusal force of the posterior region.</description><subject>CAD</subject><subject>CAD/CAM</subject><subject>CAM</subject><subject>Ceramics</subject><subject>Composite materials</subject><subject>Computer aided design</subject><subject>Computer aided manufacturing</subject><subject>Contact stresses</subject><subject>Dental Materials</subject><subject>Dental Porcelain</subject><subject>Dental Restoration Failure</subject><subject>Dental Stress Analysis</subject><subject>Denture, Partial, Removable</subject><subject>Dentures</subject><subject>FEM</subject><subject>Finite Element Analysis</subject><subject>Finite element method</subject><subject>Fracture load</subject><subject>Fracture toughness</subject><subject>Glass ceramics</subject><subject>Lithium</subject><subject>Materials Testing</subject><subject>Prostheses</subject><subject>Removable partial denture</subject><subject>Rest</subject><subject>Rest seat</subject><subject>Stress concentration</subject><subject>Tensile stress</subject><subject>Zirconia</subject><subject>Zirconium dioxide</subject><issn>0287-4547</issn><issn>1881-1361</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpdkU-P0zAQxSMEYsvCjTOyxIUD2fXYjuNwK4VdkBZxgbPl2hM2Vf4Ux6noN-HjMiHbInGx5fHPb974ZdlL4FeKg7gO3e5KcAG5EOpRtgJjIAep4XG24sKUuSpUeZE9G8cd56rSxjzNLmQhVFVxWGW_b6LzaYrIIo7NmFzvkQ0126w_XG_WX-ZqGqJLzQFZ5xLGxrUja3rWNSOd_T0GYrrh4LYtsr2LiQAWsD9ppvEdW_fzi0OT4sDw155EOgKIc31gddM3CRm2OBep5NojOXmePampFb542C-z7zcfv20-5Xdfbz9v1ne5LwFSjkF65NW2lqUuNNdBKBFQg_Ou5Ci1w-Doc2owVVDGg1a6Kh0vQl3KcgtGXmZvFt19HH5O5NfSZB7b1vU4TKMVWmpTCqkVoa__Q3fDFMnvTBFiAKAg6u1C-TiMY8Ta7mleF48WuJ0Ts5SYnROzlBjhrx5Ep22H4QyfIiLgdgHotvGuHfq26fFf63Dk9N2LpLCUMXBpOWjLlZ6XUigudCEFKb1flHaU8w88t5pD8y3-9aXAynk5-Ttf-nsXLfbyDzCFwPo</recordid><startdate>20220525</startdate><enddate>20220525</enddate><creator>UCHIKURA, Keiichiro</creator><creator>MURAKAMI, Natsuko</creator><creator>YAMAZAKI, Toshiki</creator><creator>LYU, Huaxin</creator><creator>NAGATA, Kohji</creator><creator>ONA, Masahiro</creator><creator>IWASAKI, Naohiko</creator><creator>TAKAHASHI, Hidekazu</creator><creator>WAKABAYASHI, Noriyuki</creator><general>The Japanese Society for Dental Materials and Devices</general><general>Japanese Society for Dental Materials and Devices</general><general>Japan Science and Technology Agency</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QP</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>K9.</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>20220525</creationdate><title>Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An in vitro experimental and finite element analysis</title><author>UCHIKURA, Keiichiro ; 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Mater. J.</addtitle><date>2022-05-25</date><risdate>2022</risdate><volume>41</volume><issue>3</issue><spage>466</spage><epage>472</epage><pages>466-472</pages><artnum>2021-224</artnum><issn>0287-4547</issn><eissn>1881-1361</eissn><abstract>To evaluate the fracture resistance of computer-aided design and computer-assisted manufacturing restorations as the abutment of removable partial dentures, experimental blocks, with the rest seat made of feldspar, hybrid resin composite, lithium disilicate glass ceramic, or zirconia, were subjected to loading by a metallic occlusal rest. The rest contacted the rest seat with an accurate fit and two mismatch contact conditions: bottom and sidewall contact. Zirconia exhibited the highest fracture load, and the fracture load of the accurate fit was significantly higher than that of the sidewall contact (p<0.05) and insignificantly higher than that of the bottom contact (p>0.05). A finite element analysis of the sidewall contact revealed a higher tensile stress concentration at the bottom of the rest seat than the other contact conditions. The mismatch between the rest and the restoration reduced fracture resistance, while zirconia as the abutment withstood the average occlusal force of the posterior region.</abstract><cop>Japan</cop><pub>The Japanese Society for Dental Materials and Devices</pub><pmid>35249901</pmid><doi>10.4012/dmj.2021-224</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Dental Materials Journal, 2022/05/25, Vol.41(3), pp.466-472 |
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| subjects | CAD CAD/CAM CAM Ceramics Composite materials Computer aided design Computer aided manufacturing Contact stresses Dental Materials Dental Porcelain Dental Restoration Failure Dental Stress Analysis Denture, Partial, Removable Dentures FEM Finite Element Analysis Finite element method Fracture load Fracture toughness Glass ceramics Lithium Materials Testing Prostheses Removable partial denture Rest Rest seat Stress concentration Tensile stress Zirconia Zirconium dioxide |
| title | Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An in vitro experimental and finite element analysis |
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