EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH
Objective: To carry out a comparative analysis of the accuracy of the adherence of tooth-supported cast and milled cobalt chrome alloy frameworks in the shoulder area depending on the length of the prostheses. Methods: For the clinical trial 314 patients who needed metal-ceramic fixed dental pros...
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| Format: | Article |
| Language: | English |
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Avicenna Tajik State Medical University
2022-09-01
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| Series: | Паёми Сино |
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| Online Access: | https://doi.org/10.25005/2074-0581-2022-24-3-344-352 |
| _version_ | 1827925430667051008 |
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| author | А.N. PARKHOMENKO V.I. SHEMONAEV |
| author_facet | А.N. PARKHOMENKO V.I. SHEMONAEV |
| author_sort | А.N. PARKHOMENKO |
| collection | DOAJ |
| description | Objective: To carry out a comparative analysis of the accuracy of the adherence of tooth-supported cast and milled cobalt chrome alloy frameworks in the shoulder area depending on the length of the prostheses.
Methods: For the clinical trial 314 patients who needed metal-ceramic fixed dental prostheses (FDPs) were recruited. Metal frameworks of prostheses were made with conventional lost-wax technique (CLW) and computer aided design and manufacturing (CAD/CAM). To assess the accuracy of the adhesion of the frameworks to the ledges of the prepared teeth stumps, the silicon film between the abutment teeth and inner surface of crowns was obtained, cut into 8 pieces and measured in the shoulder area. The marginal gaps were measured using ImageJ2 application from digital photos obtained with calibrated digital microscope (250×). The data obtained were analyzed using the non-parametric Kruskal-Wallis H-test and Mann- Whitney U-test.
Results: The average values of the marginal gap in the CLW group ranged from 71.9±7.6 μm in single and double crowns to 117±3.7 μm in prostheses with a length of 7-8 units. With a corresponding increase in the length of the prostheses, the average values of the marginal gap in the CAD/CAM group were from 67.1±6.8 μm to 90.8±8.3 μm. Differences in marginal clearance parameters between all groups were statistically significant (p<0.05), except for the group of single and paired crowns with milled caps.
Conclusion: The values of the edge gap in all groups were within the acceptable range. However, CAD/CAM frameworks were significantly more accurate in long-length prostheses. |
| first_indexed | 2024-03-13T05:25:38Z |
| format | Article |
| id | doaj.art-bf268de37b2848589c9f2ee0682aa72e |
| institution | Directory Open Access Journal |
| issn | 2074-0581 2959-6327 |
| language | English |
| last_indexed | 2024-03-13T05:25:38Z |
| publishDate | 2022-09-01 |
| publisher | Avicenna Tajik State Medical University |
| record_format | Article |
| series | Паёми Сино |
| spelling | doaj.art-bf268de37b2848589c9f2ee0682aa72e2023-06-15T08:27:25ZengAvicenna Tajik State Medical UniversityПаёми Сино2074-05812959-63272022-09-0124334435210.25005/2074-0581-2022-24-3-344-352EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTHА.N. PARKHOMENKO0V.I. SHEMONAEV1Department of Orthopedic Dentistry with the Course of Clinical Dentistry, Volgograd State Medical University, Volgograd, Russian FederationDepartment of Orthopedic Dentistry with the Course of Clinical Dentistry, Volgograd State Medical University, Volgograd, Russian FederationObjective: To carry out a comparative analysis of the accuracy of the adherence of tooth-supported cast and milled cobalt chrome alloy frameworks in the shoulder area depending on the length of the prostheses. Methods: For the clinical trial 314 patients who needed metal-ceramic fixed dental prostheses (FDPs) were recruited. Metal frameworks of prostheses were made with conventional lost-wax technique (CLW) and computer aided design and manufacturing (CAD/CAM). To assess the accuracy of the adhesion of the frameworks to the ledges of the prepared teeth stumps, the silicon film between the abutment teeth and inner surface of crowns was obtained, cut into 8 pieces and measured in the shoulder area. The marginal gaps were measured using ImageJ2 application from digital photos obtained with calibrated digital microscope (250×). The data obtained were analyzed using the non-parametric Kruskal-Wallis H-test and Mann- Whitney U-test. Results: The average values of the marginal gap in the CLW group ranged from 71.9±7.6 μm in single and double crowns to 117±3.7 μm in prostheses with a length of 7-8 units. With a corresponding increase in the length of the prostheses, the average values of the marginal gap in the CAD/CAM group were from 67.1±6.8 μm to 90.8±8.3 μm. Differences in marginal clearance parameters between all groups were statistically significant (p<0.05), except for the group of single and paired crowns with milled caps. Conclusion: The values of the edge gap in all groups were within the acceptable range. However, CAD/CAM frameworks were significantly more accurate in long-length prostheses.https://doi.org/10.25005/2074-0581-2022-24-3-344-352teeth prepcad/camaccuracy of the fitledgeprecision of the fitmarginal gap. |
| spellingShingle | А.N. PARKHOMENKO V.I. SHEMONAEV EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH Паёми Сино teeth prep cad/cam accuracy of the fit ledge precision of the fit marginal gap. |
| title | EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH |
| title_full | EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH |
| title_fullStr | EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH |
| title_full_unstemmed | EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH |
| title_short | EVALUATION OF FITTING ACCURACY OF METAL FRAMEWORKS OF FIXED DENTURES DEPENDING ON THEIR LENGTH |
| title_sort | evaluation of fitting accuracy of metal frameworks of fixed dentures depending on their length |
| topic | teeth prep cad/cam accuracy of the fit ledge precision of the fit marginal gap. |
| url | https://doi.org/10.25005/2074-0581-2022-24-3-344-352 |
| work_keys_str_mv | AT anparkhomenko evaluationoffittingaccuracyofmetalframeworksoffixeddenturesdependingontheirlength AT vishemonaev evaluationoffittingaccuracyofmetalframeworksoffixeddenturesdependingontheirlength |