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https://www.readbyqxmd.com/read/28936291/casein-phosphopeptide-amorphous-calcium-phosphate-effects-on-brackets-shear-bond-strength-and-enamel-damage
#1
Roya Naseh, Farnoosh Fallahzadeh, Mohammad Atai, Omid Mortezai, Raheleh Setayeshrad
BACKGROUND: The aim of study was to evaluate the application of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride regarding their effect on the shear bond strength (SBS), bond failure pattern of brackets using the adhesive remnant index (ARI) and assessing the quality of enamel surface using the enamel damage index (EDI). MATERIAL AND METHODS: Sixty extracted premolar teeth were randomly divided into four groups regarding pretreatment application of CPP-ACP and fluoride...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28936282/effect-of-thermocycling-and-surface-treatment-on-repair-bond-strength-of-composite
#2
Nazanin Kiomarsi, Pardis Saburian, Nasim Chiniforush, Mohammad-Javd Karazifard, Sedighe-Sadat Hashemikamangar
BACKGROUND: Repair of composite restorations is a conservative method that can increase the longevity and durability of restorations while preserving the tooth structure. Achieving a suitable bond between the old and new composite is difficult. To overcome this problem, some methods have been recommended to increase the repair bond strength of composite.This study aimed to assess the effect of aging by thermocycling (5,000 and 10,000 cycles) and mechanical surface treatments (Er,Cr:YSGG laser and bur) on repair shear bond strength of composite resin...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28932310/remineralization-potential-of-three-tooth-pastes-on-enamel-caries
#3
Rajnish K Singhal, Balwant Rai
BACKGROUND: Different formulations of dentifrices exist in the market. Usually, single toothpaste is used by all family members including children. There is a big concern of fluoride ingestion with the toothpaste containing high fluoride content in children. Recently, new toothpaste (including toothpaste) with remineralization potential without fluoride content has been formulated. AIM: There is an urgent need to compare remineralization potential of this new formulation with the exiting dentifrices...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28932142/color-stability-and-marginal-integrity-of-interim-crowns-an-in-vitro-study
#4
Marwa I Elagra, Mohammad R Rayyan, Maisam M Alhomaidhi, Areej A Alanaziy, Mona O Alnefaie
OBJECTIVE: Many commercial dental materials are used to fabricate interim restorations. This study aimed to compare the color stability and the marginal integrity of four different interim crown materials. MATERIALS AND METHODS: An ivorine right maxillary central incisor was prepared for a full coverage all-ceramic restoration. A total of 36 specimens in the form of crowns were fabricated on the master die using four different materials (n = 9); Polymethyl methacrylate (PMMA) resin (TrimPLUS), PMMA computer-aided design, and computer-aided manufacturing (CAD-CAM) blocks (Ceramill TEMP), cold cure bis-acryl resin (Success CD), and bis-acryl resin dual-cure composite (TempSpan)...
July 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28932134/using-erbium-doped-yttrium-aluminum-garnet-laser-irradiation-in-different-energy-output-levels-versus-ultrasonic-in-removal-of-root-canal-filling-materials-in-endodontic-retreatment
#5
Mehmet Omer Gorduysus, Hanin Al-Rubai, Basheer Salman, Deena Al Saady, Hiba Al-Dagistani, Sevda Muftuoglu
OBJECTIVES: The objective of this study was to evaluate the efficacy of erbium-doped yttrium aluminum garnet (Er:YAG) laser irradiation in different energy outputs versus ultrasonic in gutta-percha removal during the endodontic retreatment. MATERIALS AND METHODS: A total of 21 extracted human lower premolars were divided into three groups (n = 7). Following the standardized preparation of the root canals with Wave One Rotary system and obturation with gutta-percha: Group I was treated with ultrasonic, Group II by Er:YAG laser with 40 mJ/Pulse, and Group III by Er:YAG laser with 50 mJ/Pulse for the removal of gutta-percha from the canals...
July 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28927130/stereomicroscopic-features-of-colitis-associated-tumors-in-mice-evaluation-of-pit-pattern
#6
Ryosuke Yamauchi, Ken Kominato, Keiichi Mitsuyama, Hidetoshi Takedatsu, Shinichiro Yoshioka, Kotaro Kuwaki, Hiroshi Yamasaki, Shuhei Fukunaga, Atsushi Mori, Jun Akiba, Osamu Tsuruta, Takuji Torimura
Patients with longstanding ulcerative colitis have an increased risk of colorectal cancer. Mouse models for colitis-associated tumors are indispensable for the development of novel strategies for prevention and intervention, as well as an improved understanding of the mechanisms underlying tumor formation. The present study examined whether stereomicroscopic observations with dye-application were able to detect and discriminate tumors in a colitis-associated tumor model in mice. Colonic tumors were induced in C57BL/6 mice by 15 cycles of treatment with dextran sulfate sodium (DSS) in drinking water...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926617/hidden-biodiversity-in-entomological-collections-the-overlooked-co-occurrence-of-dipteran-and-hymenopteran-ant-parasitoids-in-stored-biological-material
#7
Gabriela Pérez-Lachaud, Jean-Paul Lachaud
Biological collections around the world are the repository of biodiversity on Earth; they also hold a large quantity of unsorted, unidentified, or misidentified material and can house behavioral information on species that are difficult to access or no longer available to science. Among the unsorted, alcohol-preserved material stored in the Formicidae Collection of the 'El Colegio de la Frontera Sur' Research Center (Chetumal, Mexico), we found nine colonies of the ponerine ant Neoponera villosa, that had been collected in bromeliads at Calakmul (Campeche, Mexico) in 1999...
2017: PloS One
https://www.readbyqxmd.com/read/28914243/an-in-vitro-comparison-of-casein-phosphopeptide-amorphous-calcium-phosphate-paste-casein-phosphopeptide-amorphous-calcium-phosphate-paste-with-fluoride-and-casein-phosphopeptide-amorphous-calcium-phosphate-varnish-on-the-inhibition-of-demineralization-and-promotion
#8
Prachi Jayesh Thakkar, Chandrashekhar M Badakar, Shivayogi M Hugar, Seema Hallikerimath, Punit M Patel, Parin Shah
AIM: This study aims to determine and compare the extent of inhibition of demineralization and promotion of remineralization of permanent molar enamel with and without application of three remineralizing agents. MATERIALS AND METHODS: Forty extracted permanent molars were randomly divided into two groups 1 and 2, longitudinally sectioned into four and divided into subgroups A, B, C, and D. The sections were coated with nail varnish leaving a window of 3 mm × 3 mm...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28900274/characterization-and-identification-of-a-woody-lesion-mimic-mutant-lmd-showing-defence-response-and-resistance-to-alternaria-alternate-in-birch
#9
Ranhong Li, Su Chen, Guifeng Liu, Rui Han, Jing Jiang
Lesion mimic mutants (LMM) usually show spontaneous cell death and enhanced defence responses similar to hypersensitive response (HR) in plants. Many LMM have been reported in rice, wheat, maize, barley, Arabidopsis, etc., but little was reported in xylophyta. BpGH3.5 is an early auxin-response factor which regulates root elongation in birch. Here, we found a T-DNA insertion mutant in a BpGH3.5 transgenic line named lmd showing typical LMM characters and early leaf senescence in Betula platyphylla × B...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28890612/comparative-evaluation-of-sealing-ability-water-absorption-and-solubility-of-three-temporary-restorative-materials-an-in-vitro-study
#10
A R Prabhakar, N Shantha Rani, Saraswathi V Naik
BACKGROUND: The quality of the coronal seal of root canal filling material is important for periapical health. Absorption of water or saliva by the temporary restorative materials leads to dimensional changes, loss of retention, staining and breaking in margin contours. Hence this study was carried out to evaluate and compare the sealing properties, water absorption and solubility of IRM (intermediate restorative material), Cavit G and GC Caviton. STUDY DESIGN: Experimental, in vitro intergroup randomized control trial...
April 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28890608/coronal-sealing-capacity-of-temporary-restorative-materials-in-pediatric-dentistry-a-comparative-study
#11
Shabnam Milani, Bahman Seraj, Alireza Heidari, Atousa Mirdamadi, Mahdi Shahrabi
AIMS: The aim of this in vitro study is to compare the coronal microleakage of three common temporary restorative materials, namely Coltosol, Compoglass, and Zonalin, used in pediatric dentistry after endodontic treatment at different time intervals (1 week, 1, and 2 months) using dye penetration. MATERIALS AND METHODS: Access cavities were prepared in 72 intact extracted premolar teeth. The samples were divided into three groups (n = 24) and filled with Coltosol, Compoglass, or Zonalin...
April 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28872726/bond-strength-of-resin-cement-and-glass-ionomer-to-nd-yag-laser-treated-zirconia-ceramics
#12
Nafiseh Asadzadeh, Foojan Ghorbanian, Farzaneh Ahrary, Hamidreza Rajati Haghi, Reza Karamad, Amir Yari, Abdollah Javan
PURPOSE: To investigate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the surface properties and bond strength of zirconia ceramics. MATERIALS AND METHODS: Forty-eight zirconia ceramic pieces (4 × 4 × 1 mm(3) ) were divided into four groups according to surface treatment as follows: two control groups (no treatment) for resin bonding (CRC) and glass ionomer (GI) bonding (CGC); two laser treatment groups (Nd:YAG irradiation, 3 W, 200 MJ, 10 Hz, 180 μs) for resin bonding (LRC) and GI bonding (LGC)...
September 5, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28865185/developmental-morphology-and-topography-of-the-components-of-the-cervical-sympathetic-trunk-in-sheep-ovis-aries-during-the-fetal-period
#13
Jamal Nourinezhad, Saleh Bamohabat, Yazdan Mazaheri
The objective of this study was to clarify the typical architecture and morphological variations of cervical sympathetic trunk (CST) in sheep during fetal period. Components of CST were examined on both sides of 40 male and female sheep fetuses aged from 60-140 days under a stereomicroscope. Skeletotopy and frequency of presence of cranial cervical ganglion (CCG), syntopy of cervical ganglia, and composition and topography of vagosympathetic trunk were consistent among specimens whereas the shape of cervical ganglia, the skeletotopy and number of three middle cervical ganglia (MG), and the frequency of communicating branches of CCG to the first cervical spinal nerve exhibited differences during fetal period...
September 2, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28855753/comparative-evaluation-of-apical-microleakage-in-immediate-and-delayed-postspace-preparation-using-four-different-root-canal-sealers-an-in-vitro-study
#14
Prabeesh Padmanabhan, Joydeep Das, R Veena Kumari, P R Pradeep, Ankur Kumar, Sneha Agarwal
BACKGROUND: Endodontically treated teeth often lack sufficient support for a permanent restoration. During post space preparation, it is important not to disturb the integrity of the apical seal. AIM: This study compared the effect of immediate versus delayed post space preparation on the apical seal using four different sealers. MATERIALS AND METHODS: One hundred and thirty single rooted teeth were biomechanically prepared and obturated with single cone gutta-percha and 4 sealers: Endoflas FS, AH Plus, Gutta flow and MTA...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28845033/microleakage-and-penetration-depth-of-different-fissure-sealant-materials-after-cyclic-thermo-mechanic-and-brushing-simulation
#15
Hüseyin Hatirli, Bilal Yasa, Elif Yasa
The aim of the study was to evaluate microleakage and the penetration-depths of different fissure-sealant materials applied with/without enameloplasty after cyclic aging. One-hundred-sixty mandibular molars were divided into non-invasive and enameloplasty preparation groups and eight material subgroups, including: flowable composites (microhyrid, nanohybrid, and nanofilled), three resin-based (unfilled, filled, and highly-filled), a giomer-based, and a glass-ionomer-based fissure sealant. Specimens were subjected to two-year cyclic chewing and brushing simulation...
August 25, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28832715/characterization-and-coating-stability-evaluation-of-nickel-titanium-orthodontic-esthetic-wires-an-in-vivo-study
#16
COMPARATIVE STUDY
Nina Argalji, Eduardo Moreira da Silva, Adriana Cury-Saramago, Claudia Trindade Mattos
The objective of this study was to compare coating dimensions and surface characteristics of two different esthetic covered nickel-titanium orthodontic rectangular archwires, as-received from the manufacturer and after oral exposure. The study was designed for comparative purposes. Both archwires, as-received from the manufacturer, were observed using a stereomicroscope to measure coating thickness and inner metallic dimensions. The wires were also exposed to oral environment in 11 orthodontic active patients for 21 days...
August 21, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28828154/analysis-of-surface-characteristics-of-protaper-universal-and-protaper-next-instruments-by-scanning-electron-microscopy
#17
Jeffery Bennett, Kwok-Hung Chung, Hanson Fong, James Johnson, Avina Paranjpe
BACKGROUND: Many new rotary files systems have been introduced, however, limited research has been conducted related to the surface irregularities of these files and if these have any effects on the files themselves. Hence, the aim of the present study was to analyze surface irregularities of the ProTaper® Universal rotary files (PTU) and the ProTaper Next™ rotary files (PTN) before and after instrumentation in curved canals. The main objective was to investigate the nature of these irregularities and how they might influence the use and fracture of rotary files during root-canal treatments...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28828018/effect-of-intracanal-post-space-treatments-on-push-out-bond-strength-of-fiber-posts-to-root-dentin
#18
Hamid Kermanshah, Behnam Bolhari, Faraz Sedaghat, Ladan Ranjbar Omrani
OBJECTIVES: The main disadvantage of fiber posts is their low bond strength to root canal wall. The aim of the present study was to assess the effect of different root canal post space treatments on push-out bond strength of fiber posts to root canal dentin. MATERIALS AND METHODS: After post space preparation in 40 endodontically treated human premolars, the teeth were randomly divided into four experimental groups: Group 1: control group, group 2: Endsolv R, group 3: ultrasonic cleaning, group 4: Clearfil Repair...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828014/diagnostic-value-of-conventional-and-digital-radiography-for-detection-of-cavitated-and-non-cavitated-proximal-caries
#19
Mahdieh Dehghani, Rasool Barzegari, Hosein Tabatabai, Sahar Ghanea
OBJECTIVES: This study aimed to assess the diagnostic value of conventional and digital radiography for detection of cavitated and non-cavitated proximal caries. MATERIALS AND METHODS: Fifty extracted human premolars and molars were mounted in a silicone block. Charge-coupled device (CCD) and photostimulable phosphor plate (PSP) receptors and intra-oral films were exposed with 60 and 70 kVp with parallel technique. Two observers interpreted the radiographs twice with a two-week interval using a 5-point scale...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28771376/slant-perception-under-stereomicroscopy
#20
Samantha Horvath, Kori Macdonald, John Galeotti, Roberta L Klatzky
Objective These studies used threshold and slant-matching tasks to assess and quantitatively measure human perception of 3-D planar images viewed through a stereomicroscope. The results are intended for use in developing augmented-reality surgical aids. Background Substantial research demonstrates that slant perception is performed with high accuracy from monocular and binocular cues, but less research concerns the effects of magnification. Viewing through a microscope affects the utility of monocular and stereo slant cues, but its impact is as yet unknown...
August 1, 2017: Human Factors
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