The purpose of this study was to evaluate the shear bond strengths of four light-cured glass ionomer cements used for direct bonding of ceramic brackets, and to compare the results with a two-paste chemically-cured composite resin. Two commercially available polycrystalline ceramic brackets, with either chemically or mechanically retentive bracket bases, were evaluated. The brackets were bonded...

BACKGROUND Fixed prosthodontics is a routine dental treatment and microleakage is a major cause of its failure. OBJECTIVES The aim of this study was to assess the marginal microleakage of four cements in metal ceramic restorations with adapted and open margins. MATERIALS AND METHODS Sixty sound human premolars were selected for this experimental study performed in Tehran, Iran and prepared ...

The aims of this study were to evaluate the shear bond strength (SBS), fracture mode, and wire pull out (WPO) resistance between resin-modified glass ionomer cement (RMGIC) and conventional orthodontic composite used as a lingual retainer adhesive. Forty lower human incisors were randomly divided into two equal groups. To determine the SBS, either Transbond-LR or Fuji Ortho-LC was applied to th...

background: the most important limitation of glass ionomer cements (gics) is the weak mechanical properties. our previous research showed that higher mechanical properties could be achieved by addition of forsterite (mg2sio4) nanoparticles to ceramic part of gic. the objective of the present study was to fabricate a glass ionomer- mg2sio4 nanocomposite and to evaluate the effect of addition of ...

INTRODUCTION For orthodontists, the ideal bonding material should be less moisture-sensitive and should release fluoride, thereby reducing unfavorable iatrogenic decalcification. Resin-Modified Glass Ionomer Cements (RMGICs), due to their ability to bond in the presence of saliva and blood can be a very good bonding agent for orthodontic attachments especially in the areas of mouth, which are d...

Fracture of the bracket-cement-enamel system usually takes place between the bracket and the cement. Especially for glass ionomer-based materials, it is helpful if this part of the system can be improved. The aim of this in vitro study was to investigate the influence of different bracket base pre-treatments in relation to three different cements, Transbond XT, a resin composite, Fuji Ortho LC,...

objective: to measure the long-term linear hygroscopic expansion (lhe) of several materials using bulked and layered techniques. materials and methods: seven materials were used; fuji cap ii, fuji ii lc, photac-fil aplicap, vitremer, dyract, tetric and z100. ten specimens (6×4 mm) were made for each material using layered and bulked techniques (each group comprises five specimens). the specimen...

‘Press finger' in atraumatic restorative treat­ ment (ART) is used to spread a glass ionomer cement (GIC) to seal the restoration margin and adjacent pits and fissures. This study compared the spreadability of Fuji IX® and Ketac®-Molar to establish which was best suited for this purpose. Twenty equally spaced cavities (35 mm apart) were machinecut in each of two Perspex slabs 200 x 100 x 20 mm....

STATEMENT OF THE PROBLEM Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) increases the mineral content of tooth structure. This may enhance the chemical bonding of glass ionomer cements (GIC) and marginal sealing of their restorations. PURPOSE The aim of this study was to evaluate the effect of CPP-ACP paste pretreatment on the microleakage of three types of GIC. MATERIALS AND M...

statement of the problem: casein phosphopeptide–amorphous calcium phosphate (cpp-acp) increases the mineral content of tooth structure. this may enhance the chemical bonding of glass ionomer cements (gic) and marginal sealing of their restorations. purpose: the aim of this study was to evaluate the effect of cpp-acp paste pretreatment on the microleakage of three types of gic. materials and met...