Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique
Aim: The aim of the study was to compare the assessment methods used to evaluate the fit of Ni-Cr metal copings. Settings and Design: Comparative- Invitro study design. Materials and Methods: A stainless steel die simulating a prepared first maxillary premolar was used as a master die. Wax pattern c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2019-01-01
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| Series: | The Journal of Indian Prosthodontic Society |
| Subjects: | |
| Online Access: | http://www.j-ips.org/article.asp?issn=0972-4052;year=2019;volume=19;issue=3;spage=233;epage=239;aulast=Ram |
| _version_ | 1831738770768003072 |
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| author | Sabita M Ram Nishita Narendra Ranadive Jyoti B Nadgere |
| author_facet | Sabita M Ram Nishita Narendra Ranadive Jyoti B Nadgere |
| author_sort | Sabita M Ram |
| collection | DOAJ |
| description | Aim: The aim of the study was to compare the assessment methods used to evaluate the fit of Ni-Cr metal copings.
Settings and Design: Comparative- Invitro study design.
Materials and Methods: A stainless steel die simulating a prepared first maxillary premolar was used as a master die. Wax pattern copings were fabricated by the conventional dipping wax technique (n = 20) on the master die and were cast in Ni-Cr alloy. The finished copings were fitted on the master die and scanned by the micro-computed tomography (CT) scanner. Multiple projections of the sample were reconstructed to evaluate the marginal and internal fit at 5 predetermined locations. The same copings were used for the replica technique and were evaluated under a stereomicroscope in the same locations.
Statistical Analysis Used: Shapiro–Wilk's test and Unpaired t-test
Results: The marginal fit values observed were 127.71 and 95.06 μm, chamfer area fit values were 151.97 and 132.7 μm, axial area fit values were 62.36 and 46.14 μm, axio-occlusal area fit values were 139.52 and 123.6 μm, occlusal area fit values were slightly higher with 217.91 and 193.1 μm, respectively, in replica and micro-CT technique. There was no statistically significant difference observed in the fit between the two assessment methods (α > 0.05).
Conclusions: There was no difference observed in the marginal and internal fit of Ni-Cr metal copings with the two methods of assessment. However, the micro-CT technique proved to be simpler, noninvasive, and time-saving assessment method. |
| first_indexed | 2024-12-21T13:28:16Z |
| format | Article |
| id | doaj.art-ca60596d8b904a49bc2e4ab1021586ca |
| institution | Directory Open Access Journal |
| issn | 0972-4052 1998-4057 |
| language | English |
| last_indexed | 2024-12-21T13:28:16Z |
| publishDate | 2019-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | The Journal of Indian Prosthodontic Society |
| spelling | doaj.art-ca60596d8b904a49bc2e4ab1021586ca2022-12-21T19:02:24ZengWolters Kluwer Medknow PublicationsThe Journal of Indian Prosthodontic Society0972-40521998-40572019-01-0119323323910.4103/jips.jips_71_19Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica techniqueSabita M RamNishita Narendra RanadiveJyoti B NadgereAim: The aim of the study was to compare the assessment methods used to evaluate the fit of Ni-Cr metal copings. Settings and Design: Comparative- Invitro study design. Materials and Methods: A stainless steel die simulating a prepared first maxillary premolar was used as a master die. Wax pattern copings were fabricated by the conventional dipping wax technique (n = 20) on the master die and were cast in Ni-Cr alloy. The finished copings were fitted on the master die and scanned by the micro-computed tomography (CT) scanner. Multiple projections of the sample were reconstructed to evaluate the marginal and internal fit at 5 predetermined locations. The same copings were used for the replica technique and were evaluated under a stereomicroscope in the same locations. Statistical Analysis Used: Shapiro–Wilk's test and Unpaired t-test Results: The marginal fit values observed were 127.71 and 95.06 μm, chamfer area fit values were 151.97 and 132.7 μm, axial area fit values were 62.36 and 46.14 μm, axio-occlusal area fit values were 139.52 and 123.6 μm, occlusal area fit values were slightly higher with 217.91 and 193.1 μm, respectively, in replica and micro-CT technique. There was no statistically significant difference observed in the fit between the two assessment methods (α > 0.05). Conclusions: There was no difference observed in the marginal and internal fit of Ni-Cr metal copings with the two methods of assessment. However, the micro-CT technique proved to be simpler, noninvasive, and time-saving assessment method.http://www.j-ips.org/article.asp?issn=0972-4052;year=2019;volume=19;issue=3;spage=233;epage=239;aulast=RamConventional wax patternsmarginal and internal fitmicro-computed tomography techniqueNi-Cr alloyreplica technique |
| spellingShingle | Sabita M Ram Nishita Narendra Ranadive Jyoti B Nadgere Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique The Journal of Indian Prosthodontic Society Conventional wax patterns marginal and internal fit micro-computed tomography technique Ni-Cr alloy replica technique |
| title | Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| title_full | Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| title_fullStr | Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| title_full_unstemmed | Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| title_short | Microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| title_sort | microcomputed tomography a noninvasive method to evaluate the fit of a restoration as compared to conventional replica technique |
| topic | Conventional wax patterns marginal and internal fit micro-computed tomography technique Ni-Cr alloy replica technique |
| url | http://www.j-ips.org/article.asp?issn=0972-4052;year=2019;volume=19;issue=3;spage=233;epage=239;aulast=Ram |
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