Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture
Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Military Health Department, Ministry of Defance, Serbia
2013-01-01
|
| Series: | Vojnosanitetski Pregled |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0042-8450/2013/0042-84501300021S.pdf |
| _version_ | 1811254533910691840 |
|---|---|
| author | Šćepanović Miodrag Tihaček-Šojić Ljiljana Tasić Milan Mitrović Radivoje Todorović Aleksandar Trifković Branka |
| author_facet | Šćepanović Miodrag Tihaček-Šojić Ljiljana Tasić Milan Mitrović Radivoje Todorović Aleksandar Trifković Branka |
| author_sort | Šćepanović Miodrag |
| collection | DOAJ |
| description | Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale. |
| first_indexed | 2024-04-12T17:08:53Z |
| format | Article |
| id | doaj.art-1d129c221d4d4e6b8d16a53e7b3998f4 |
| institution | Directory Open Access Journal |
| issn | 0042-8450 |
| language | English |
| last_indexed | 2024-04-12T17:08:53Z |
| publishDate | 2013-01-01 |
| publisher | Military Health Department, Ministry of Defance, Serbia |
| record_format | Article |
| series | Vojnosanitetski Pregled |
| spelling | doaj.art-1d129c221d4d4e6b8d16a53e7b3998f42022-12-22T03:23:51ZengMilitary Health Department, Ministry of Defance, SerbiaVojnosanitetski Pregled0042-84502013-01-017011999100510.2298/VSP110526021SFinite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial dentureŠćepanović MiodragTihaček-Šojić LjiljanaTasić MilanMitrović RadivojeTodorović AleksandarTrifković BrankaBacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale.http://www.doiserbia.nb.rs/img/doi/0042-8450/2013/0042-84501300021S.pdfdenture, partial, removabledental prosthesis designdental claspsdental alloystitaniumpoly acetylenessafety |
| spellingShingle | Šćepanović Miodrag Tihaček-Šojić Ljiljana Tasić Milan Mitrović Radivoje Todorović Aleksandar Trifković Branka Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture Vojnosanitetski Pregled denture, partial, removable dental prosthesis design dental clasps dental alloys titanium poly acetylenes safety |
| title | Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| title_full | Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| title_fullStr | Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| title_full_unstemmed | Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| title_short | Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| title_sort | finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture |
| topic | denture, partial, removable dental prosthesis design dental clasps dental alloys titanium poly acetylenes safety |
| url | http://www.doiserbia.nb.rs/img/doi/0042-8450/2013/0042-84501300021S.pdf |
| work_keys_str_mv | AT scepanovicmiodrag finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture AT tihaceksojicljiljana finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture AT tasicmilan finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture AT mitrovicradivoje finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture AT todorovicaleksandar finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture AT trifkovicbranka finiteelementanalysisindefiningtheoptimalshapeandsafetyfactorofretentiveclasparmsofremovablepartialdenture |