An In Vitro Study to Evaluate the Retention of Complete Crowns Prepared with Five Different Tapers and Luted with Two Different Cements
This study includes comparatively evaluating and drawing general conclusion about the best advisable taper and cement for maximal retention. Eighty extracted human maxillary premolar teeth with sound surfaces were selected using dial vernier caliper. Selected teeth were randomly divided into five di...
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| Veröffentlicht in: | The journal of Indian Prosthodontic Society 2010-06, Vol.10 (2), p.89-95 |
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| creator | Chandra Shekar, Sajjan Giridhar, Kamath Suhas Rao, K. |
| description | This study includes comparatively evaluating and drawing general conclusion about the best advisable taper and cement for maximal retention. Eighty extracted human maxillary premolar teeth with sound surfaces were selected using dial vernier caliper. Selected teeth were randomly divided into five different taper groups (0°, 3°, 6°, 9° and 12°). The crown preparations with different tapers respectively were achieved by graduated customized device. Preparations were verified with special set up. Crowns were cast with Co–Cr alloy; metal copings were luted with glass ionomer and zinc phosphate cement. Retention was measured (MPa) by separating the metal crowns from the teeth under tension on a universal testing machine, data was recorded and statistically analyzed. Glass ionomer cemented 0° and 12° taper group showed increase in retentive strength (
p
= 0.003 hs), when compared to zinc phosphate cement. 9° and 12° group showed decreased retentive strength (
p
= 0.001 vhs) when compared with 0° taper group. No significant difference found between 0° and 3° and 6° group. The choice of cement for crowns prepared within this ideal range (0°–6° taper) might be of limited clinical significance. 3° and 6° taper with zinc phosphate or glass ionomer cement shown to be ideal for maximum retention. |
| doi_str_mv | 10.1007/s13191-010-0017-x |
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p
= 0.003 hs), when compared to zinc phosphate cement. 9° and 12° group showed decreased retentive strength (
p
= 0.001 vhs) when compared with 0° taper group. No significant difference found between 0° and 3° and 6° group. The choice of cement for crowns prepared within this ideal range (0°–6° taper) might be of limited clinical significance. 3° and 6° taper with zinc phosphate or glass ionomer cement shown to be ideal for maximum retention.</description><identifier>ISSN: 0972-4052</identifier><identifier>EISSN: 1998-4057</identifier><identifier>DOI: 10.1007/s13191-010-0017-x</identifier><identifier>PMID: 21629450</identifier><language>eng</language><publisher>India: Springer-Verlag</publisher><subject>Dentistry ; Medicine ; Original ; Original Article</subject><ispartof>The journal of Indian Prosthodontic Society, 2010-06, Vol.10 (2), p.89-95</ispartof><rights>Indian Prosthodontic Society 2010</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383x-52fed1d35884c918fae4265ef49a9be47107941ebee7e7d40ded6ef2ea7263af3</citedby><cites>FETCH-LOGICAL-c383x-52fed1d35884c918fae4265ef49a9be47107941ebee7e7d40ded6ef2ea7263af3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081264/pdf/$$EPDF$$P50$$Gpubmedcentral$$H</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081264/$$EHTML$$P50$$Gpubmedcentral$$H</linktohtml><link.rule.ids>230,314,727,780,784,864,885,27923,27924,53790,53792</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21629450$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chandra Shekar, Sajjan</creatorcontrib><creatorcontrib>Giridhar, Kamath</creatorcontrib><creatorcontrib>Suhas Rao, K.</creatorcontrib><title>An In Vitro Study to Evaluate the Retention of Complete Crowns Prepared with Five Different Tapers and Luted with Two Different Cements</title><title>The journal of Indian Prosthodontic Society</title><addtitle>J Indian Prosthodont Soc</addtitle><addtitle>J Indian Prosthodont Soc</addtitle><description>This study includes comparatively evaluating and drawing general conclusion about the best advisable taper and cement for maximal retention. Eighty extracted human maxillary premolar teeth with sound surfaces were selected using dial vernier caliper. Selected teeth were randomly divided into five different taper groups (0°, 3°, 6°, 9° and 12°). The crown preparations with different tapers respectively were achieved by graduated customized device. Preparations were verified with special set up. Crowns were cast with Co–Cr alloy; metal copings were luted with glass ionomer and zinc phosphate cement. Retention was measured (MPa) by separating the metal crowns from the teeth under tension on a universal testing machine, data was recorded and statistically analyzed. Glass ionomer cemented 0° and 12° taper group showed increase in retentive strength (
p
= 0.003 hs), when compared to zinc phosphate cement. 9° and 12° group showed decreased retentive strength (
p
= 0.001 vhs) when compared with 0° taper group. No significant difference found between 0° and 3° and 6° group. 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Eighty extracted human maxillary premolar teeth with sound surfaces were selected using dial vernier caliper. Selected teeth were randomly divided into five different taper groups (0°, 3°, 6°, 9° and 12°). The crown preparations with different tapers respectively were achieved by graduated customized device. Preparations were verified with special set up. Crowns were cast with Co–Cr alloy; metal copings were luted with glass ionomer and zinc phosphate cement. Retention was measured (MPa) by separating the metal crowns from the teeth under tension on a universal testing machine, data was recorded and statistically analyzed. Glass ionomer cemented 0° and 12° taper group showed increase in retentive strength (
p
= 0.003 hs), when compared to zinc phosphate cement. 9° and 12° group showed decreased retentive strength (
p
= 0.001 vhs) when compared with 0° taper group. No significant difference found between 0° and 3° and 6° group. The choice of cement for crowns prepared within this ideal range (0°–6° taper) might be of limited clinical significance. 3° and 6° taper with zinc phosphate or glass ionomer cement shown to be ideal for maximum retention.</abstract><cop>India</cop><pub>Springer-Verlag</pub><pmid>21629450</pmid><doi>10.1007/s13191-010-0017-x</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| source | Medknow Open Access Medical Journals; DOAJ Directory of Open Access Journals; PubMed Central; EZB Electronic Journals Library |
| subjects | Dentistry Medicine Original Original Article |
| title | An In Vitro Study to Evaluate the Retention of Complete Crowns Prepared with Five Different Tapers and Luted with Two Different Cements |
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