Comparative Analysis of Marginal Accuracy of Complete Crowns Fabricated by Using Ringless and Metal Ring Investment Systems : An In Vitro Study
AIM: To compare the vertical margin accuracy of lost wax castings produced by the conventional casting technique with all metal (WIRONIUM®) and PFM alloy (WIRON®99) using a metal ring and ringless system.
MATERIALS AND METHODS: A brass die assembly was used to fabricate standardized wax pattern crowns. A total of 100 wax patterns were made with both ringless and metal ring investment systems. Wax patterns were readapted and refined on the master die and divided into two groups, namely, group I and group II with 50 wax patterns in each group. Group I (ringless system) and group II (metal ring system) were further divided into subgroups having a sample size of 25 in each group. Each coping was invested and cast individually. The marginal discrepancy between the metal die and the castings were measured by a stereomicroscope and AutoCAD software 2013. Measurement was made on the facial area of the metal die.
RESULTS: The resultant casts obtained from different casting systems show statistically significant difference found between the marginal discrepancies using metal ring and ringless castings system, and statistically nonsignificant difference was found between the marginal discrepancies using all metal alloy (WIRONIUM®) and PFM alloy (WIRON®99) within the same group.
CONCLUSION: The marginal discrepancy for castings made with ringless casting system was less when compared to metal ring casting system, and there was no difference in marginal discrepancy when compared to all metal alloy (WIRONIUM®) and PFM alloy (WIRON®99) within the same group.
CLINICAL SIGNIFICANCE: Marginal fit is influenced by several factors including type of crown, tooth preparation geometry, dimensional accuracy of impression materials, factors related to dental casting, type of cement, luting pressure, duration of cementation, and use of occlusal vents or die spacers.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:21 |
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| Enthalten in: |
The journal of contemporary dental practice - 21(2020), 8 vom: 01. Aug., Seite 852-856 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Saini, Nikki [VerfasserIn] |
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| Themen: |
Dental Cements |
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| Anmerkungen: |
Date Completed 12.02.2021 Date Revised 12.02.2021 published: Electronic Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM321287142 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM321287142 | ||
| 003 | DE-627 | ||
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| 041 | |a eng | ||
| 100 | 1 | |a Saini, Nikki |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Comparative Analysis of Marginal Accuracy of Complete Crowns Fabricated by Using Ringless and Metal Ring Investment Systems |b An In Vitro Study |
| 264 | 1 | |c 2020 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 12.02.2021 | ||
| 500 | |a Date Revised 12.02.2021 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a AIM: To compare the vertical margin accuracy of lost wax castings produced by the conventional casting technique with all metal (WIRONIUM®) and PFM alloy (WIRON®99) using a metal ring and ringless system | ||
| 520 | |a MATERIALS AND METHODS: A brass die assembly was used to fabricate standardized wax pattern crowns. A total of 100 wax patterns were made with both ringless and metal ring investment systems. Wax patterns were readapted and refined on the master die and divided into two groups, namely, group I and group II with 50 wax patterns in each group. Group I (ringless system) and group II (metal ring system) were further divided into subgroups having a sample size of 25 in each group. Each coping was invested and cast individually. The marginal discrepancy between the metal die and the castings were measured by a stereomicroscope and AutoCAD software 2013. Measurement was made on the facial area of the metal die | ||
| 520 | |a RESULTS: The resultant casts obtained from different casting systems show statistically significant difference found between the marginal discrepancies using metal ring and ringless castings system, and statistically nonsignificant difference was found between the marginal discrepancies using all metal alloy (WIRONIUM®) and PFM alloy (WIRON®99) within the same group | ||
| 520 | |a CONCLUSION: The marginal discrepancy for castings made with ringless casting system was less when compared to metal ring casting system, and there was no difference in marginal discrepancy when compared to all metal alloy (WIRONIUM®) and PFM alloy (WIRON®99) within the same group | ||
| 520 | |a CLINICAL SIGNIFICANCE: Marginal fit is influenced by several factors including type of crown, tooth preparation geometry, dimensional accuracy of impression materials, factors related to dental casting, type of cement, luting pressure, duration of cementation, and use of occlusal vents or die spacers | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Dimensional accuracy | |
| 650 | 4 | |a Metal ring system Ringless system. | |
| 650 | 7 | |a Dental Cements |2 NLM | |
| 650 | 7 | |a Dental Impression Materials |2 NLM | |
| 700 | 1 | |a Kumar, Sandeep |e verfasserin |4 aut | |
| 700 | 1 | |a Aggarwal, Rajnish |e verfasserin |4 aut | |
| 700 | 1 | |a Choudhary, Sunita |e verfasserin |4 aut | |
| 700 | 1 | |a Tyagi, Ritwik |e verfasserin |4 aut | |
| 700 | 1 | |a Malethia, Akhilesh |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t The journal of contemporary dental practice |d 1999 |g 21(2020), 8 vom: 01. Aug., Seite 852-856 |w (DE-627)NLM120286645 |x 1526-3711 |7 nnns |
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