OBJECTIVE The aim of this study was to evaluate the bond strength between metal brackets and non-glazed ceramic with three different surface treatment methods. MATERIALS AND METHODS Forty-two non-glazed ceramic disks were assigned into three groups. Group I and II specimens were etched with 9.5% hydrofluoric acid. Subsequently in group I, silane and adhesive were applied and in group II, bond...

BACKGROUND/PURPOSE The aim of this study was to compare the shear bond strength of computer aided design/computer aided machined ceramic (CAD/CAM), pressable ceramic, and milled metal implant copings on abutment and the effect of surface conditioning on bonding strength. MATERIALS AND METHODS A total of 90 test samples were fabricated on three titanium abutments. Among 90 test samples, 30 cop...

background : chip-off fracture of veneering porcelain has been described as the most frequent reason for the failure of zirconia-based fi xed partial dentures. the purpose of this study was to evaluate the shear bond strength (sbs) of two commercial zirconia core ceramics to their corresponding veneering ceramics. materials and methods : zirconia disks with 7-mm diameter and 3-mm height were pr...

Background and aims. The aim of this study was to compare shear bond strength (SBS) of metal and ceramic brackets bonded to enamel using acid versus Er:YAG laser etching. Materials and methods. Eighty premolars were divided into 4 groups: AM (acid etching/ metal brackets), AC (acid etching/ ceramic brackets), LM (laser etching/ metal brackets) and LC (laser etching/ ceramic brackets). Enamel co...

Objectives Due to the increasing price of gold CAD/CAM titanium-ceramic restorations were developed to give alternative to the established metal-ceramic restorations with a high gold content. Despite the advantages of excellent biocompatibility, high corrosion resistance and appropriate strength titanium has made the casting process difficult caused by the high affinity of molten titanium to in...

Teeth that have been endodontically treated often have little coronal tooth tissue remaining and, as such, require a post to retain the core and restoration, and need to be restored by crowns1,5,9. Metal posts are most commonly used due to their favourable physical properties and excellent biocompatibility4,8. With recent advances in ceramic technology, the all-ceramic crown has become more pop...

Introduction: Marginal fit is a key factor for long term clinical success through any dental restorations. Poor marginal adaptation causes cement dissolution. This can lead to dental caries, gingival irritation, periodontal diseases, and finally treatment failure. The aim of this study was measurement and comparison of marginal gap quantities in metal ceramic and all ceramic dental restorations...

BACKGROUND Few large series of hard bearing surfaces have reported on reasons for early failure. A number of unique mechanisms of failure, including fracture, squeaking, and adverse tissue reactions, have been reported with these hard bearing surfaces. However, the incidence varies among the published studies. QUESTIONS/PURPOSES To confirm the incidences, we identified the etiologies of early...

different techniques have been introduced for the removal of ceramic brackets. since the early 1990s, lasers have been used experimentally for debonding ceramic brackets. the goal of this study is to give a comprehensive literature review on laser-aided ceramic bracket debonding. pubmed and google scholar databases were used to identify dental articles with the following combination of key word...