Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses
Abstract Objectives This in vitro study evaluated implant-supported single crowns with external connections fabricated using different techniques (cast and CAD/CAM) and materials (metal-ceramic and translucent zirconia) regarding vertical and horizontal marginal fit and torque loss before and afte...
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University of São Paulo
2025-05-01
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| Series: | Journal of Applied Oral Science |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572025000100420&lng=en&tlng=en |
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| author | João Pedro Justino DE OLIVEIRA LIMIRIO Jéssica Marcela de Luna GOMES Joel Ferreira SANTIAGO-JUNIOR Cleidiel Aparecido Araújo LEMOS Maria Cristina Rosifini Alves REZENDE Eduardo Piza PELLIZZER |
| author_facet | João Pedro Justino DE OLIVEIRA LIMIRIO Jéssica Marcela de Luna GOMES Joel Ferreira SANTIAGO-JUNIOR Cleidiel Aparecido Araújo LEMOS Maria Cristina Rosifini Alves REZENDE Eduardo Piza PELLIZZER |
| author_sort | João Pedro Justino DE OLIVEIRA LIMIRIO |
| collection | DOAJ |
| description | Abstract Objectives This in vitro study evaluated implant-supported single crowns with external connections fabricated using different techniques (cast and CAD/CAM) and materials (metal-ceramic and translucent zirconia) regarding vertical and horizontal marginal fit and torque loss before and after mechanical cycling. Methodology A total of 50 specimens prepared using cast (lost wax) and CAD/CAM were divided into five groups—MC (metal–ceramic crowns), ZrB (Co-Cr base, coping milled in zirconia and feldspathic ceramic veneering), Zr (coping milled in zirconia and feldspathic ceramic veneering), MZrB (Co-Cr base and monolithic translucent zirconia crown), and MZr (monolithic translucent zirconia crown)—and subjected to 5×10⁶ mechanical cycles at a 30° angle at 37°C, and an applied load of 150N at 2Hz. All crowns were screwed with a 30Ncm torque. Vertical and horizontal marginal misfit (measured using a 3D optical microscope) and torque loss were assessed before and after mechanical cycling. Statistical analyses used a significance value of 0.05. Results Before cycling, MC (93.93±22.84µm) and MZrB (66.12±11.87µm) (p<0.05) crowns showed significantly higher vertical marginal misfit values than Zr (49.92±3µm) and MZr (49.76±3,9µm). ZrB (59.96±4.66µm) crowns exhibited no statistically significant difference when compared with the other groups. MC crowns presented the highest horizontal marginal misfit values before and after cycling in group comparisons (p<0.05). MZrB had the highest torque loss (10N), with a statically significant difference when compared with MZr and Zr (p<0.05). Comparison between all groups showed no significant difference regarding the effect of mechanical cycling (p>0.05). Conclusion CAD/CAM manufacturing resulted in lower vertical and horizontal marginal misfit values, especially for monolithic translucent zirconia crowns (MZr) before and after mechanical cycling. All groups presented torque loss before and after mechanical cycling. |
| format | Article |
| id | doaj-art-6d4f22ff79fa40f582272809734cac41 |
| institution | DOAJ |
| issn | 1678-7765 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | University of São Paulo |
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| series | Journal of Applied Oral Science |
| spelling | doaj-art-6d4f22ff79fa40f582272809734cac412025-08-20T03:07:33ZengUniversity of São PauloJournal of Applied Oral Science1678-77652025-05-013310.1590/1678-7757-2024-0589Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prosthesesJoão Pedro Justino DE OLIVEIRA LIMIRIOhttps://orcid.org/0000-0002-8620-8480Jéssica Marcela de Luna GOMEShttps://orcid.org/0000-0001-8091-9209Joel Ferreira SANTIAGO-JUNIORhttps://orcid.org/0000-0003-1735-2224Cleidiel Aparecido Araújo LEMOShttps://orcid.org/0000-0001-8273-489XMaria Cristina Rosifini Alves REZENDEhttps://orcid.org/0000-0002-1327-9667Eduardo Piza PELLIZZERhttps://orcid.org/0000-0003-0670-5004Abstract Objectives This in vitro study evaluated implant-supported single crowns with external connections fabricated using different techniques (cast and CAD/CAM) and materials (metal-ceramic and translucent zirconia) regarding vertical and horizontal marginal fit and torque loss before and after mechanical cycling. Methodology A total of 50 specimens prepared using cast (lost wax) and CAD/CAM were divided into five groups—MC (metal–ceramic crowns), ZrB (Co-Cr base, coping milled in zirconia and feldspathic ceramic veneering), Zr (coping milled in zirconia and feldspathic ceramic veneering), MZrB (Co-Cr base and monolithic translucent zirconia crown), and MZr (monolithic translucent zirconia crown)—and subjected to 5×10⁶ mechanical cycles at a 30° angle at 37°C, and an applied load of 150N at 2Hz. All crowns were screwed with a 30Ncm torque. Vertical and horizontal marginal misfit (measured using a 3D optical microscope) and torque loss were assessed before and after mechanical cycling. Statistical analyses used a significance value of 0.05. Results Before cycling, MC (93.93±22.84µm) and MZrB (66.12±11.87µm) (p<0.05) crowns showed significantly higher vertical marginal misfit values than Zr (49.92±3µm) and MZr (49.76±3,9µm). ZrB (59.96±4.66µm) crowns exhibited no statistically significant difference when compared with the other groups. MC crowns presented the highest horizontal marginal misfit values before and after cycling in group comparisons (p<0.05). MZrB had the highest torque loss (10N), with a statically significant difference when compared with MZr and Zr (p<0.05). Comparison between all groups showed no significant difference regarding the effect of mechanical cycling (p>0.05). Conclusion CAD/CAM manufacturing resulted in lower vertical and horizontal marginal misfit values, especially for monolithic translucent zirconia crowns (MZr) before and after mechanical cycling. All groups presented torque loss before and after mechanical cycling.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572025000100420&lng=en&tlng=enDental ImplantCAD/CAMZirconia |
| spellingShingle | João Pedro Justino DE OLIVEIRA LIMIRIO Jéssica Marcela de Luna GOMES Joel Ferreira SANTIAGO-JUNIOR Cleidiel Aparecido Araújo LEMOS Maria Cristina Rosifini Alves REZENDE Eduardo Piza PELLIZZER Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses Journal of Applied Oral Science Dental Implant CAD/CAM Zirconia |
| title | Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses |
| title_full | Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses |
| title_fullStr | Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses |
| title_full_unstemmed | Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses |
| title_short | Influence of manufacturing methods and use of CoCr-based abutments on vertical and horizontal marginal fit and torque loss in implant-supported prostheses |
| title_sort | influence of manufacturing methods and use of cocr based abutments on vertical and horizontal marginal fit and torque loss in implant supported prostheses |
| topic | Dental Implant CAD/CAM Zirconia |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572025000100420&lng=en&tlng=en |
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