OBJECTIVES This in vitro study evaluated the shear bond strength (SBS) of resin composite to feldspathic porcelain after acidulated phosphate fluoride (APF) gel treatment over different periods of time. METHODS One hundred and fifty-six feldspathic specimens were divided into 12 groups. Group C received no treatment (control group). Groups APF1 through APF10, ten experimental groups, were tre...

AIM The aim of the study was to correlate the pH and fluoride ion uptake with surface hardness of composite resin based restorative materials after topical fluoride application. METHODOLOGY Forty disks of each of test materials Composite (Filtek Z350XT, 3M ESPE, St Paul, MN, USA), Resin modified glass ionomer (Vitremer) and Compomer (Dyract AP) were made and ten disks of each material were pl...

objective: probable effect of fluoride containing materials like apf on sealants is very important. the purpose of this study is to assess the effect of frequent application of apf (1.23%) on the surface microhardness of two fissure sealants and one flowable composite.   methods: in this experimental study, 81 specimens of two fissure sealants and one flowable composite were prepared, using spe...

Received: 28 Dec 2010 Accepted: 27 August 2011 Abstract Background and Aim: Fluoride has an important role in the prevention of caries. This study assessed the efficacy of three types of topical fluoride: fluoride varnish, APF gel (sultan), APF gel (Kimia) in protecting the enamel from demineralization in an in vitro environment. Materials and Methods: Sixty human caries-free premolars where ra...

The oral retention of fluoride (F) following the topical application of a newly developed APF foam was compared with a conventional APF gel. Twenty adults aged 16-26 years participated in the study. Ten of the subjects received the F foam and gel treatments, on separate occasions, with a saliva ejector while another 10 subjects received the same treatment without saliva ejector. Approximately 4...

The purpose of this in vitro study was to compare the effects of a 1-min immersion and of 4-min immersions in an acidulated phosphate fluoride (1.23% APF) foam, a 1.23% APF gel, a 2.0% sodium fluoride (NaF) gel, and water on surface topography and on weight of a composite resin (APH). Forty composite resin specimens were placed into eight groups (N = 5 each). For each treatment, a group of spec...

Background and Aim: The aim of this study was to examine the effect of Er:YAG laser irradiation on caries-like lesions in a simulated caries model. Materials and Methods: Twenty extracted human noncarious molar teeth were selected. The teeth were covered with nail varnish, leaving two windows (approximately 4mm×2mm) on both the buccal and lingual surfaces at the middle third of the crown. The w...

There is concern that the ingestion of fluoride (F) from topical application of 1.23% APF gel may cause gastric irritation and other side effects. In this in vitro study, a newly developed APF-based foam was tested. Sound human enamel was treated for 4 rain with APF foam or a conventional APF gel (Nupro®), both containing 1.23 % F. Enamel biopsies were obtained using the acid-etch technique. Th...