Marginal Strength of Collarless Metal Ceramic Crown
Metal ceramic restorations have been implicated for the discoloration in area of labiogingivalmargin. Attempts to rectify this, by altering the design of metal frameworkswill lead to decrease in fracture strength atmargin. This in vitro study compared the fracture strength at margins of metal cerami...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | International Journal of Dentistry |
| Online Access: | http://dx.doi.org/10.1155/2010/521470 |
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| author | Sikka Swati R. Chowdhary P. S. Patil |
| author_facet | Sikka Swati R. Chowdhary P. S. Patil |
| author_sort | Sikka Swati |
| collection | DOAJ |
| description | Metal ceramic restorations have been implicated for the discoloration in area of labiogingivalmargin. Attempts to rectify this, by altering the design of metal frameworkswill lead to decrease in fracture strength atmargin. This in vitro study compared the
fracture strength at margins of metal ceramic crowns cemented to metal tooth analogs. Crowns evaluated with different marginal configurations, shoulder and shoulder bevel with 0 mm, 0.5 mm, 1 mm, and 1.5 mm, were selected. Methods. Maxillary right canine typhodont tooth was prepared to receive a metal ceramic crown with shoulder margin. This was duplicated to get 20 metal teeth analogs. Then the same tooth was reprepared to get shoulder bevel configuration. These crowns were then cemented onmetal teeth analogs and tested for fracture strength atmargin on an Instron testing machine. A progressive compressive load was applied using 6.3 mm diameter rod with crosshead speed of 2.5 mm per minute. Statisticaly analysis was performed with ANOVA, Student's “t” test and “f” test. Results. The fracture strength of collarless metal ceramic crowns under study exceeded the normal biting force. Therefore it can be suggested that collarless metal ceramic crowns with shoulder or shoulder bevel margins up to 1.5 mm framework reduction may be indicated for anteriormetal ceramic restorations. Significance. k Collarless metal ceramic crowns have proved to be successful for anterior fixed restorations. Hence, it may be subjected to more clinical trials. |
| format | Article |
| id | doaj-art-6d5c1490cb4c47bc837a207a0bd93eb5 |
| institution | Kabale University |
| issn | 1687-8728 1687-8736 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Dentistry |
| spelling | doaj-art-6d5c1490cb4c47bc837a207a0bd93eb52025-02-03T01:31:06ZengWileyInternational Journal of Dentistry1687-87281687-87362010-01-01201010.1155/2010/521470521470Marginal Strength of Collarless Metal Ceramic CrownSikka Swati0R. Chowdhary1P. S. Patil2Department of Maxillofacial Prosthodontics and Implantology, AIIMS Dental College and Hospital, New Delhi 110012, IndiaDepartment of Maxillofacial Prosthodontics and Implantology, HKE’S S. Nijalingappa Institute of Dental Sciences & Research Centre, Gulbarga 585104, IndiaDepartment of Maxillofacial Prosthodontics and Implantology, HKE’S S. Nijalingappa Institute of Dental Sciences & Research Centre, Gulbarga 585104, IndiaMetal ceramic restorations have been implicated for the discoloration in area of labiogingivalmargin. Attempts to rectify this, by altering the design of metal frameworkswill lead to decrease in fracture strength atmargin. This in vitro study compared the fracture strength at margins of metal ceramic crowns cemented to metal tooth analogs. Crowns evaluated with different marginal configurations, shoulder and shoulder bevel with 0 mm, 0.5 mm, 1 mm, and 1.5 mm, were selected. Methods. Maxillary right canine typhodont tooth was prepared to receive a metal ceramic crown with shoulder margin. This was duplicated to get 20 metal teeth analogs. Then the same tooth was reprepared to get shoulder bevel configuration. These crowns were then cemented onmetal teeth analogs and tested for fracture strength atmargin on an Instron testing machine. A progressive compressive load was applied using 6.3 mm diameter rod with crosshead speed of 2.5 mm per minute. Statisticaly analysis was performed with ANOVA, Student's “t” test and “f” test. Results. The fracture strength of collarless metal ceramic crowns under study exceeded the normal biting force. Therefore it can be suggested that collarless metal ceramic crowns with shoulder or shoulder bevel margins up to 1.5 mm framework reduction may be indicated for anteriormetal ceramic restorations. Significance. k Collarless metal ceramic crowns have proved to be successful for anterior fixed restorations. Hence, it may be subjected to more clinical trials.http://dx.doi.org/10.1155/2010/521470 |
| spellingShingle | Sikka Swati R. Chowdhary P. S. Patil Marginal Strength of Collarless Metal Ceramic Crown International Journal of Dentistry |
| title | Marginal Strength of Collarless Metal Ceramic Crown |
| title_full | Marginal Strength of Collarless Metal Ceramic Crown |
| title_fullStr | Marginal Strength of Collarless Metal Ceramic Crown |
| title_full_unstemmed | Marginal Strength of Collarless Metal Ceramic Crown |
| title_short | Marginal Strength of Collarless Metal Ceramic Crown |
| title_sort | marginal strength of collarless metal ceramic crown |
| url | http://dx.doi.org/10.1155/2010/521470 |
| work_keys_str_mv | AT sikkaswati marginalstrengthofcollarlessmetalceramiccrown AT rchowdhary marginalstrengthofcollarlessmetalceramiccrown AT pspatil marginalstrengthofcollarlessmetalceramiccrown |