Evaluation of surface characteristics of titanium and cobalt chromium implant abutment materials

dc.contributor.authorHerbst, Dirk
dc.contributor.authorDullabh, Hemant D.
dc.contributor.authorSykes, Leanne M.
dc.contributor.authorVorster, C.
dc.contributor.emailleanne.sykes@up.ac.zaen_US
dc.date.accessioned2013-11-22T09:06:53Z
dc.date.available2014-09-30T00:20:06Z
dc.date.issued2013-09
dc.description.abstractINTRODUCTION: Micro-organism adhesion and plaque formation is affected by surface free energy (SFE), surface roughness, hydrophilicity, surface chemistry, surface charge and the presence of proteins. AIMS: The aim of this study was to assess and compare surface characteristics of surgical grade cobalt chromium alloy (CCM) and of commercially pure titanium (cpTi). METHOD: Nine metallic cylinders were machined to precise standards from each material. Surface roughness was measured at four different points on each sample and the average Ra value was calculated for each material. Contact angles were obtained using the sessile-drop method and applied in calculating the SFE. Surface hardness was evaluated by means of a Vickers hardness micro-indentation. RESULTS: Surface roughness was similar for both metals,but total SFE values and Vickers surface hardness scores showed significant differences (p<0.0001). CONCLUSION: SFE analysis showed CCM to be more hydrophobic and that oral bacteria might therefore be less adherent than to cpTi. The mean Vickers Hardness scores of the cpTi were significantly lower (p<0.0001), suggesting that CCM may be more resistant to surface modifications and surface roughening, thus remaining smoother with less plaque accumulation than cpTi. This study demonstrated that CCM might be a suitable alternative implant abutment material.en_US
dc.description.librarianam2013en_US
dc.description.librarianay2013en
dc.description.urihttp://www.sada.co.zaen_US
dc.identifier.citationHerbst, D, Dullabh, H, Sykes, L & Vorster, C 2013, 'Evaluation of surface characteristics of titanium and cobalt chromium implant abutment materials', South African Dental Journal, vol. 68, no. 8, pp. 350-356.en_US
dc.identifier.issn1029-4864
dc.identifier.urihttp://hdl.handle.net/2263/32574
dc.language.isoenen_US
dc.publisherSouth African Dental Associationen_US
dc.rightsSouth African Dental Associationen_US
dc.subjectSurface characteristicsen_US
dc.subjectCobalt chromium alloy (CCM)en_US
dc.subjectCommercially pure titanium (cpTi)en_US
dc.subject.lcshDental plaque -- Researchen
dc.subject.lcshDental metallurgy -- Research -- South Africaen
dc.titleEvaluation of surface characteristics of titanium and cobalt chromium implant abutment materialsen_US
dc.typeArticleen_US

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