introduction: indirect composites are developed to overcome the shortcomings of direct composites but, the adhesion of resin cements to indirect composites is still difficult. the purpose of this study was to evaluate the surface morphology of indirect resin composite treated by different powers of er:yaglaser using scanning electron microscopy (sem). methods: indirect resin composite blocks (g...

introduction: the aim of this study was to investigate the morphological changes of human dentin after erbium-doped yttrium aluminum garnet (er:yag), carbon dioxide (co2) laser-irradiation and acid-etching by means of scanning electron microscopic (sem) m ethods: 9 extracted human third molars were used in this study. the teeth were divided in three groups: first group, co2 laser with power of ...

NTRODUCTION In the past 100 years there has been extensive development of the mechanical cutting devices used in dentistry. However, while considerable progress has been made in this area of mechanical cutting, dental patients are still afraid of the noise and vibration produced by the mechanical action of the air turbine or ultrasonic scalers. From the end of the 20th century until now, there ...

We describe an efficient Q-switched laser emission from a directly grown Er :YAG single-crystal fiber resonantly pumped by a laser diode in an off-axis configuration. The laser produces 2 mJ, 38 ns pulses at 1 kHz. OCIS codes: (140.3580) Lasers, solid-state, (140.3480) Lasers, diode-pumped, (140.3540) Lasers, Q-switched, (140.3380) Laser materials, (140.3500) Lasers, erbium.

the purpose of this study was to evaluate the effect of er:yag laser on the shear bond strength of resin modified glass ionomer (rmgi) to enamel.twenty extracted caries-free human premolars were selected. the teeth were embedded in acrylic resin. the buccal surfaces of each sample were ground to plane enamel with carbonated disc. the teeth were randomly divided in two groups. in the first group...

o bjectives: providing reliable attachment between bracket base and zirconia surface is a prerequisite for exertion of orthodontic force. the purpose of the present study was to eval- uate the effect of four zirconium surface treatment methods on shear bond strength (sbs) of orthodontic brackets. mat erials and methods: one block of zirconium was trimmed into four zirconium sur- faces, which se...

introduction: the main purpose of the present study was to describe the ultra structural changes which happened after treatment of the root surfaces with ultrasonic and hand devices followed by erbium-doped yttrium aluminum garnet (er:yag) laser irradiation. methods: sixty single-rooted maxillary and mandibular teeth which had been extracted due to periodontal problems were collected. crown and...

path of microleakage between the enamel and adhesive potentially allows microbial ingress that may consequently cause enamel decalcification. the aim of this study was to compare microleakage of brackets bonded either by laser or acid etching techniques.the specimens were 33 extracted premolars that were divided into three groups as the acid etching group (group 1), laser etching with er:yag at...

the minimal invasive nature of lasers, with quick tissue response and healing has made them a very attractive technology in various fields of dentistry which serves as a tool to create a better result than ever before. the rapid development of lasers and their wavelengths with variety of applications on soft and hard tissues may continue to have major impact on the scope and practice in prosthe...

The objective of this literature review was to critically review the evidence available in the literature regarding the expediency of erbium family of lasers for root bio modification as a part of periodontal therapy. The literature search was performed on the Pubmed using MeSH words such as "lasers/therapeutic use, scaling, dental calculus, tooth root/anatomy and histology, ultrasonic therapy"...