title: Effect of a cordless retraction paste on titanium surface: a topographic, chemical and biocompatibility evaluation.
abstract: Good exposure of the preparation margins and haemostasis in the sulcular gingiva are necessary for accurate impressions to produce precise restorations. The use of cordless retraction paste material in implant dentistry is a relatively novel application. However, few studies have been conducted on the use of retraction pastes and their possible interaction with implant surfaces. Recent literature has described remnants on titanium implant surfaces and expressed the need for an assessment of the biocompatibility of the exposed surface (Chang et al.). This in vitro study evaluated the effect of a cordless gingival retraction paste on sterile titanium disks. Surface chemistry was determined using energy-dispersive X-ray spectroscopy (EDS), and further investigated using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). After exposure to retraction paste, surface chemistry alterations were identified. A fibroblast cell line (L929) was exposed to the disks and the live/dead viability/cytotoxicity assay was used to determine any effects on the proliferation and health of cells. The disks exposed to the retraction paste showed fewer dead cells compared to the unexposed disks. This was statistically significant.
authors.affiliation: Department of Oral Rehabilitation, School of Dentistry, Univ of Otago, Dunedin, New Zealand.
authors.forename: Katherine
authors.initials: K
authors.lastname: Cooper
authors.forename: Vincent
authors.initials: V
authors.lastname: Bennani
authors.forename: Andrew
authors.initials: A
authors.lastname: Tawse-Smith
authors.forename: Malcolm
authors.initials: M
authors.lastname: Reid
authors.forename: Claudine
authors.initials: C
authors.lastname: Stirling
authors.forename: George
authors.initials: G
authors.lastname: Dias
mesh_terms: D001672:Biocompatible Materials; D002470:Cell Survival; D015921:Dental Implants; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique / Q000295:instrumentation*; D005347:Fibroblasts; D060745:Gingival Retraction Techniques / Q000295:instrumentation*; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D009824:Ointments / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties; D053719:Tandem Mass Spectrometry; D013997:Time Factors; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D015921:Dental Implants; D003760:Dental Impression Materials; D009824:Ointments; D014025:Titanium