Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns
The aim of this study was to compare the retention forces after artificial aging of telescopic crowns fabricated either by a conventional lost-wax technique or by computer-aided design/computer-aided manufacturing (CAD-CAM) technology. Two types of telescopic crowns (0°) were fabricated conventional...
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MDPI AG
2020-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/14/3228 |
| _version_ | 1797561858106851328 |
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| author | Christin Arnold Ramona Schweyen Arne Boeckler Jeremias Hey |
| author_facet | Christin Arnold Ramona Schweyen Arne Boeckler Jeremias Hey |
| author_sort | Christin Arnold |
| collection | DOAJ |
| description | The aim of this study was to compare the retention forces after artificial aging of telescopic crowns fabricated either by a conventional lost-wax technique or by computer-aided design/computer-aided manufacturing (CAD-CAM) technology. Two types of telescopic crowns (0°) were fabricated conventionally using high-noble (group A) and non-precious metal (group B). CAD-CAM fabricated telescopic crowns (0°) were made of non-precious metal (group C). Retention forces were assessed before and after artificial aging and after axial and non-axial loading. Initially [I.] and after artificial aging [IV.], specimens of group C (I. 16.2 N; IV. 13.6 N) exhibited the highest retention forces. The retention forces in groups B (I. 12.5 N; IV. 4.6 N) and A (I. 9.6 N; IV. 2.9 N) were found to be lower than those of group C. The retention force differences between the groups were statistically significant (<i>p</i> < 0.001) at all measurement times [I. vs. IV.]. Different fabricated telescopic crowns with approximately identical designs and materials exhibited different retention forces and different long-term retentive behavior. An optimized CAD-CAM process with individually defined design parameters ensured telescopic crowns with a better fit. These findings might influence prospective clinical decision-making. |
| first_indexed | 2024-03-10T18:20:33Z |
| format | Article |
| id | doaj.art-1fee3b93af9b46709ece5a309413adb3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T18:20:33Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1fee3b93af9b46709ece5a309413adb32023-11-20T07:19:32ZengMDPI AGMaterials1996-19442020-07-011314322810.3390/ma13143228Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic CrownsChristin Arnold0Ramona Schweyen1Arne Boeckler2Jeremias Hey3Department of Prosthodontics, Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 16, 06112 Halle, GermanyDepartment of Prosthodontics, Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 16, 06112 Halle, GermanyDepartment of Prosthodontics, Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 16, 06112 Halle, GermanyDepartment of Prosthodontics, Martin-Luther-University Halle-Wittenberg, Magdeburger Str. 16, 06112 Halle, GermanyThe aim of this study was to compare the retention forces after artificial aging of telescopic crowns fabricated either by a conventional lost-wax technique or by computer-aided design/computer-aided manufacturing (CAD-CAM) technology. Two types of telescopic crowns (0°) were fabricated conventionally using high-noble (group A) and non-precious metal (group B). CAD-CAM fabricated telescopic crowns (0°) were made of non-precious metal (group C). Retention forces were assessed before and after artificial aging and after axial and non-axial loading. Initially [I.] and after artificial aging [IV.], specimens of group C (I. 16.2 N; IV. 13.6 N) exhibited the highest retention forces. The retention forces in groups B (I. 12.5 N; IV. 4.6 N) and A (I. 9.6 N; IV. 2.9 N) were found to be lower than those of group C. The retention force differences between the groups were statistically significant (<i>p</i> < 0.001) at all measurement times [I. vs. IV.]. Different fabricated telescopic crowns with approximately identical designs and materials exhibited different retention forces and different long-term retentive behavior. An optimized CAD-CAM process with individually defined design parameters ensured telescopic crowns with a better fit. These findings might influence prospective clinical decision-making.https://www.mdpi.com/1996-1944/13/14/3228removable partial dentureretention forcedouble crownsfrictionwearCAD-CAM |
| spellingShingle | Christin Arnold Ramona Schweyen Arne Boeckler Jeremias Hey Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns Materials removable partial denture retention force double crowns friction wear CAD-CAM |
| title | Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns |
| title_full | Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns |
| title_fullStr | Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns |
| title_full_unstemmed | Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns |
| title_short | Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns |
| title_sort | retention force of removable partial dentures with cad cam fabricated telescopic crowns |
| topic | removable partial denture retention force double crowns friction wear CAD-CAM |
| url | https://www.mdpi.com/1996-1944/13/14/3228 |
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