background: the genus pallisentis is an endoparasitic acanthocephalan inhabit­ing the intestinal walls. hooks and spines of the worm are significant taxonomical and adaptive tools. methods: the parasites were fixed, dehydrated and examined under olym­pus bx 53 microscope with dic attachment, digital camera and cellsens imag­ing system [light microscopy (lm)] and fixed in 2% glutaraldehyde in 0.1...

the commonly used nickel-titanium (niti) archwires in orthodontic treatment are often exposed to fluoride-containing mouthwashes. the aim of this in-vitro study was to evaluate and compare the corrosion resistance of three commercially available niti archwires exposed to 0.05 wt% and 0.2 wt% fluoride mouthwashes.three different types of niti archwires, 0.016″ in diameter, from dentaurum, global...

the aim of this study was to assess the surface of yttrium-stabilized tetragonal zirconia (y-tzp) after surface treatment with lasers and airborne-particle abrasion.first, 77 samples of presintered zirconia blocks measuring 10 × 10 × 2 mm were made, sintered and polished. then, they were randomly divided into 11 groups (n=7) and received surface treatments namely, er:yag laser irradiation with ...

introduction: dentin hypersensitivity (dh) is characterized by tooth pain arising from exposure of dental roots. in this study the efficiency of neodymium yttrium-aluminum-garnet (nd:yag) laser in association with graphite on dentinal surface changes as the alternative to the treatment of dh was evaluated. methods: sixteen noncarious human third molars were collected and sectioned into 5 parts ...

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...

organization of various cells lining the olfactory mucosa of puntius ticto (hamilton, 1822) were described by light as well as scanning electron microscopy. the paired olfactory chambers located antero-dorsal to the eyes and communicated outside through anterior and posterior nasal openings. the oval shaped olfactory rosette lied at the bottom of chamber and composed of 18-20 lamellae arranged ...

introduction: this study aimed to evaluate the dentin-sealer interface in three different sealers using scanning electron microscopy (sem). methods and materials: thirty extracted human single-rooted teeth were prepared using protaper rotary files and were randomly divided into three groups ( n =10) including bc sealer, ah-plus and dorifill. the root canals were filled with cold lateral condens...

introduction: the aim of this study was to verify the effect of alternating 2.5% sodium hypochlorite (naocl) and 17% ethylenediaminetetraacetic acid (edta) on the smear layer removal from root canal surfaces. methods and materials: a total of 15 single-rooted human teeth, instrumented with protaper files, were randomly distributed in 3 groups. in group 1 ( n =7) the canals were irrigated with 1...

introduction: this study aimed to assess the scanning electron microscope (sem) analysis of tooth surface irradiated by erbium:yttrium–aluminum–garnet (er:yag) laser with various parameters. methods: number of 25 extracted human third molars free of caries were used in this study. the teeth were put into 5 groups for laser irradiation as follows: group 1 (power: 0.5 w, energy: 50 mj); group 2 (...

background and objectives: biological scaffold resources composed of extracellular matrix (ecm) have been shown to make easy the practical remodeling of various tissues in both animal and human studies. the goal of current study was to make sheet form of ecm from sheep’s urinary bladder. methods: ecm was extracted from sheep’s urinary bladder according to standard method. scanning electron mic...