Modified section method for laser-welding of ill-fitting cp Ti and Ni-Cr alloy one-piece cast implant-supported frameworks.
This study aimed to verify the effect of modified section method and laser-welding on the accuracy of fit of ill-fitting commercially pure titanium (cp Ti) and Ni-Cr alloy one-piece cast frameworks. Two sets of similar implant-supported frameworks were constructed. Both groups of six 3-unit implant-...
| Published in: | Journal of Oral Rehabilitation Vol. 37; no. 5; pp. 359 - 364 |
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| Main Authors: | , , , , , |
| Format: | pictorial research tables/charts Journal Article |
| Published: |
Wiley-Blackwell
May2010
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105176557&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105176557 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 0305182X ERZ jtl: Journal of Oral Rehabilitation issn: 0305182X maglogo: Y pubinfo: dt: May2010 vid: 37 iid: 5 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 105176557 105176557 2010628410 10.1111/j.1365-2842.2010.02063.x NLM20149062 105176557 ppf: 359 ppct: 5 formats: tig: atl: Modified section method for laser-welding of ill-fitting cp Ti and Ni-Cr alloy one-piece cast implant-supported frameworks. aug: au: Tiossi R Falcao-Filho H Aguiar FA Jr. Rodrigues RC Mattos MG Ribeiro RF sug: subj: Dental Implants Equipment and Supplies Lasers Prostheses and Implants Adverse Effects Prosthesis Failure Analysis of Variance Denture, Partial Descriptive Statistics Human In Vitro Studies Post Hoc Analysis ab: This study aimed to verify the effect of modified section method and laser-welding on the accuracy of fit of ill-fitting commercially pure titanium (cp Ti) and Ni-Cr alloy one-piece cast frameworks. Two sets of similar implant-supported frameworks were constructed. Both groups of six 3-unit implant-supported fixed partial dentures were cast as one-piece [I: Ni-Cr (control) and II: cp Ti] and evaluated for passive fitting in an optical microscope with both screws tightened and with only one screw tightened. All frameworks were then sectioned in the diagonal axis at the pontic region (III: Ni-Cr and IV: cp Ti). Sectioned frameworks were positioned in the matrix (10-Ncm torque) and laser-welded. Passive fitting was evaluated for the second time. Data were submitted toanova and Tukey-Kramer honestly significant difference tests ( P < 0·05). With both screws tightened, one-piece cp Ti group II showed significantly higher misfit values (27·57 ± 5·06 [mu]m) than other groups (I: 11·19 ± 2·54 [mu]m, III: 12·88 ± 2·93 [mu]m, IV: 13·77 ± 1·51 [mu]m) ( P < 0·05). In the single-screw-tightened test, with readings on the opposite side to the tightened side, Ni-Cr cast as one-piece (I: 58·66 ± 14·30 [mu]m) was significantly different from cp Ti group after diagonal section (IV: 27·51 ± 8·28 [mu]m) ( P < 0·05). On the tightened side, no significant differences were found between groups ( P > 0·05). Results showed that diagonally sectioning ill-fitting cp Ti frameworks lowers misfit levels of prosthetic implant-supported frameworks and also improves passivity levels of the same frameworks when compared to one-piece cast structures. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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