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Journal of Dentistry

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https://www.readbyqxmd.com/read/28625857/validation-of-the-visible-occlusal-plaque-index-vopi-in-estimating-caries-lesion-activity
#1
J C Carvalho, H D Mestrinho, L S Oliveira, M M Varjão, N Aimée, V Qvist
OBJECTIVE: The present study appraises the construct validity of the Visible Occlusal Plaque Index (VOPI) along with its sub-types, convergent and discriminant validity. METHODS: 618 10-15year old Brazilian adolescents were included. The VOPI has a four-point ordinal scale ranging from no plaque to heavy plaque. VOPI scores and caries status on permanent molars were mapped and recorded at individual anatomical sites of the groove-fossa-system and at surface level...
June 15, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28619693/oral-astringent-stimuli-alter-the-enamel-pellicle-s-ultrastructure-as-revealed-by-electron-microscopy
#2
Melanie Rehage, Judith Delius, Thomas Hofmann, Matthias Hannig
OBJECTIVES: This electron microscopic study aimed at investigating effects of oral astringent stimuli on the enamel pellicle's morphology. METHODS: Pellicles were formed in situ within 30min on bovine enamel slabs, fixed to individuals' upper jaw splints. The pellicle-coated specimens were immersed in vitro in seven diverse astringent solutions and subsequently analyzed by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, as well as transmission electron microscopy (TEM)...
June 12, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28602851/impact-of-delayed-gratification-on-oral-health-and-caries-status-in-the-primary-dentition
#3
Carolina Caleza-Jimenez, Rosa Yañez-Vico, Asunción Mendoza-Mendoza, Juan Carlos Palma, Alejandro Iglesias-Linares
OBJECTIVE: The ability to delay gratification (ATDG) is naturally linked to key regulatory psychological traits involved in self-discipline/regulation. The aim of this study was to ascertain the normalized impact of ATDG as an early predictor of oral health, on the primary dentition. METHODS: 404 subjects [202 children (4-6 years old) and 202 mothers] were enrolled in a case-control study. Systematic data collection included: i) extraoral diagnostic parameters; ii)intraoral health status; iii)behavioral aspects; iv)baseline socio-demographic data...
June 8, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28602850/repair-may-increase-survival-of-direct-posterior-restorations-a-practice-based-study
#4
Luciano Casagrande, Mark Laske, Ewald M Bronkhorst, Marie Charlotte D N J M Huysmans, Niek J M Opdam
OBJECTIVES: To investigate repairs of direct restorations by a group of Dutch general dental practitioners (GDPs) and its consequences on longevity of restorations. METHODS: Data set was based on dental records of patients attending 11 general dental practices (24 Dentists) in the Netherlands. Patients that received Class II Amalgam or Composite restorations were included in the study. The outcomes were considered in two levels: "Success" - When no intervention was necessary on the original restoration, it was considered clinically acceptable...
June 8, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28591620/the-effects-of-mechanical-and-hydrothermal-aging-on-microstructure-and-biaxial-flexural-strength-of-an-anterior-and-a-posterior-monolithic-zirconia
#5
Eduardo Mariscal Muñoz, Diogo Longhini, Selma Gutierres Antonio, Gelson Luis Adabo
OBJECTIVES: To evaluate the effect of hydrothermal aging (H), mechanical cycling (M), and the combination of hydrothermal plus mechanical cycling (H+M) on biaxial flexural strength (BFS) and microstructure of two monolithic zirconias, indicated for anterior (AMZ) or posterior restorations (PMZ) and a conventional zirconia (IZr). METHODS: Disc specimens of each material (n=12) were submitted to: i) H (8hours in autoclave at 134°C); ii) M (10(6) cycles, at 40% of BFS); and iii) H+M...
June 4, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28587978/a-new-arginine-based-dental-adhesive-system-formulation-mechanical-and-anti-caries-properties
#6
Saulo Geraldeli, Eveline F Soares, Andres J Alvarez, Tanaz Farivar, Robert C Shields, Mario A C Sinhoreti, Marcelle M Nascimento
Secondary caries at the margins of composite restorations has been attributed to adhesive failure and consequent accumulation of cariogenic biofilms. OBJECTIVES: to develop and evaluate an etch-and-rinse adhesive system containing arginine for sustainable release and recharge without affecting its mechanical properties. Arginine metabolism by oral bacteria generates ammonia, which neutralizes glycolytic acids and creates a neutral environmental pH that is less favorable to the growth of caries pathogens, thus reducing the caries risk at the tooth-composite interface...
June 3, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28587977/combination-of-straight-and-tilted-implants-for-supporting-screw-retained-dental-prostheses-in-atrophic-posterior-maxillae-a-2-year-prospective-study
#7
Juan-Carlos Casar-Espinosa, Raquel Castillo-Oyagüe, María Ángeles Serrera-Figallo, Roberto Garrido-Serrano, Christopher D Lynch, Manuel Menéndez-Collar, Daniel Torres-Lagares, José-Luis Gutiérrez-Pérez
OBJECTIVES: To evaluate the two-year survival rate (SR) and marginal bone loss (MBL) of fixed dental prostheses (FDPs) supported by straight (S) and tilted (T) implants under the influence of diverse study variables. METHODS: A prospective investigation comprising 21 patients provided with a total of 27 maxillary screw-retained restorations fixed to 70 dental implants was developed. Two groups of implants were considered depending on their inclination with respect to the occlusal plane: Group 1 (S, n=37): straight/axial implants and Group 2 (T, n=33): tilted/angled fixations...
June 3, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28579385/response-of-carious-enamel-to-tif4-varnish-treatment-under-diverse-cariogenic-activities-in-situ
#8
L P Comar, B M Souza, J Martins, M G Santos, M A R Buzalaf, A C Magalhães
OBJECTIVE: To compare the effect of TiF4 and NaF varnishes on pre-demineralized bovine enamel under different cariogenic activities in situ. METHODS: Twenty subjects participated of this in situ study with 3 crossover phases (14days each), in which they wore palatal appliances containing demineralized bovine enamel samples (8 samples/appliance for phase) treated with TiF4, NaF (all with 2.45% F) or placebo varnish. The samples were subjected to different cariogenic conditions (1...
June 1, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28579384/managing-molars-with-severe-molar-incisor-hypomineralization-a-cost-effectiveness-analysis-within-german-healthcare
#9
Karim Elhennawy, Paul-Georg Jost-Brinkmann, David John Manton, Sebastian Paris, Falk Schwendicke
OBJECTIVES: Dentists have a range of options for managing molars with severe molar-incisor hypomineralization (MIH), each with different long-term implications. The cost-effectiveness of managing molars with severe MIH was assessed. METHODS: A mixed public-private-payer perspective within German healthcare was adopted. Individuals with one to four severely MIH-affected molars were followed over their lifetime. We compared: (1) removal of the tooth/teeth and orthodontic alignment of the second and third molars (Ex/Ortho); (2) restoration of the tooth using resin composite (Comp); (3) restoration using an indirect metal crown after temporizing it using a preformed metal crown (PMC/IR)...
June 1, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28576660/impact-of-light-transmittance-mode-on-polymerisation-kinetics-in-bulk-fill-resin-based-composites
#10
Nicoleta Ilie
OBJECTIVES: to determine the mode of light tran0smission and its impact on the polymerisation kinetic in modern bulk-fill resin-based composites (B-RBC). MATERIALS AND METHODS: Four low-viscosity methacrylate-based and one high-viscosity ormocer-based B-RBCs were considered. One material was available in three different shades that were all analyzed. Polymerization kinetic and light transmittance were assessed in 2 and 4mm specimen depths. Incident and transmitted irradiance and radiant exposure were measured in real-time on a laboratory-grade spectrometer...
May 30, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28571830/effect-of-bulk-fill-base-material-on-fracture-strength-of-root-filled-teeth-restored-with-laminate-resin-composite-restorations
#11
N A Taha, G A Maghaireh, A S Ghannam, J E Palamara
OBJECTIVES: To evaluate the effect of using a bulk-fill flowable base material on fracture strength and fracture patterns of root-filled maxillary premolars with MOD preparations restored with laminate restorations. METHODS: Fifty extracted maxillary premolars were selected for the study. Standardized MOD cavities with endodontic treatment were prepared for all teeth, except for intact control. The teeth were divided randomly into five groups (n=10); (Group 1) sound teeth, (Group 2) unrestored teeth; (Group 3) MOD cavities with Vitrebond base and resin-based composite (Ceram...
May 29, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28571829/corrigendum-to-a-clinical-randomized-controlled-study-on-the-use-of-desensitizing-agents-during-tooth-bleaching-j-dent-43-9-2015-1099-1105
#12
Karen Pintado-Palomino, Oscar Peitl Filho, Edgar Dutra Zanotto, Camila Tirapelli
No abstract text is available yet for this article.
May 29, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28559050/in-vitro-performance-of-near-infrared-light-transillumination-at-780-nm-and-digital-radiography-for-detection-of-non-cavitated-approximal-caries
#13
N Abogazalah, G J Eckert, M Ando
OBJECTIVES: To evaluate the ability of a Near Infrared Light Transillumination (NILT) device to detect non-cavitated approximal caries lesions; and to compare its performance to Digital Radiography (DR). METHODS: Thirty human extracted premolars (sound to lesions into the outer one-third of dentin) were selected. Lesion depth was confirmed by micro-computed tomography (μ-CT). Teeth were mounted in a custom-made device to simulate approximal contact. DR and NILT (CariVu™, DEXIS, LLC, Hatfield, PA, USA) examinations were performed and repeated by three trained and calibrated examiners...
May 27, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28554609/biofilm-induced-changes-to-the-composite-surface
#14
Ivana Nedeljkovic, Jan De Munck, Andreea-Alexandra Ungureanu, Vera Slomka, Carmen Bartic, Anja Vananroye, Christian Clasen, Wim Teughels, Bart Van Meerbeek, Kirsten L Van Landuyt
OBJECTIVES: Composites may undergo biodegradation in the oral cavity. The objective was to investigate the effect of single- and multi-species biofilms on the surface roughness and topography of two composites. METHODS: Disk-shaped specimens of a paste-like, Bis-GMA-free (Gradia Direct Anterior, GC), and a flowable, Bis-GMA-based composite (Tetric EvoFlow, Ivoclar-Vivadent) were prepared. After ethylene-oxide sterilization (38°C), specimens (n=3) were incubated with Streptococcus mutans or mixed bacterial culture (Streptococcus mutans, Streptococcus sanguinis, Actinomyces naeslundii and Fusobacterium nucleatum)...
May 26, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28552363/in-situ-evaluation-of-fluoride-stannous-and-polyphosphate-containing-solutions-against-enamel-erosion
#15
Samira Helena João-Souza, Sávio José C Bezerra, Patrícia Moreira de Freitas, Nelson B de Lima, Ana Cecília Corrêa Aranha, Anderson T Hara, Taís Scaramucci
OBJECTIVE: To evaluate the anti-erosive effect of solutions containing sodium fluoride (F: 225ppm of fluoride), sodium fluoride+stannous chloride (F+Sn: 225ppm of fluoride+800ppm of stannous), sodium fluoride+stannous chloride+sodium linear polyphosphate (F+Sn+LPP: 225ppm of fluoride+800ppm of stannous+2% of sodium linear polyphosphate), and deionized water (C: control), using a four-phase, single-blind, crossover in situ clinical trial. METHODS: In each phase, 12 volunteers wore appliances containing 4 enamel specimens, which were submitted to a 5-day erosion-remineralization phase that consisted of 2h of salivary pellicle formation with the appliance in situ, followed by 2min extra-oral immersion in 1% citric acid (pH 2...
May 25, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28545818/boron-nitride-nanotubes-as-novel-fillers-for-improving-the-properties-of-dental-adhesives
#16
Felipe Weidenbach Degrazia, Vicente Castelo Branco Leitune, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
OBJECTIVE: This study aimed to evaluate the physical-chemical properties of experimental dental adhesives containing boron nitride nanotubes (BNNTs) as inorganic fillers. METHODS: An experimental adhesive resin was prepared using HEMA-BisGMA, 66/33wt% (control). Inorganic BNNT fillers were first analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and then incorporated into the adhesive at different concentration (0.05, 0...
May 22, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28529175/longevity-of-2-and-3-surface-restorations-in-posterior-teeth-of-25-to-30-year-olds-attending-public-dental-service-a-13-year-observation
#17
Ulla Palotie, Anna K Eronen, Kimmo Vehkalahti, Miira M Vehkalahti
OBJECTIVES: The aim of this patient document-based retrospective study among 25- to 30-year-old Finnish adults was to evaluate longevity of 2- and 3-surface posterior restorations according to type of tooth, size of restoration, and restorative material used. METHODS: Data were extracted from electronic patient files of the Helsinki City Public Dental Service (PDS), Finland. A total of 5542 2- and 3-surface posterior composite and amalgam restorations were followed indirectly from 2002 to 2015...
May 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28527812/adhesive-interfacial-characteristics-and-the-related-bonding-performance-of-four-self-etching-adhesives-with-different-functional-monomers-applied-to-dentin
#18
Ruirui Wang, Yilin Shi, Tingting Li, Yueping Pan, Yu Cui, Wenwei Xia
OBJECTIVES: To examine the interfacial chemical and morphological characteristics of four self-etching adhesives bonded to dentin with different functional monomers. Further, to evaluate the effects of this interaction between functional monomers and dentin on short-term in vitro bonding performance of the four adhesives. METHODS: Clearfil SE Bond (CSE) and Scotchbond Universal (SU) containing 10-methacryloxydecyl dihydrogen phosphate (10-MDP), Optibond XTR (OX) containing glycero-phosphate dimethacrylate (GPDM), and Adper Easy One (AEO) containing 6-methacryloyloxyhexyl dihydrogen phosphate (6-MHP) were applied to the dentin surface according to the instructions supplied with each...
May 17, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28526445/the-effectiveness-of-adhesives-on-the-retention-of-mandibular-free-end-saddle-partial-dentures-an-in-vitro-study
#19
Daniel Quiney, Wayne Nishio Ayre, Paul Milward
OBJECTIVES: Existing in vitro methods for testing denture adhesives do not fully replicate the complex oral geometries and environment; and in vivo methods are qualitative, prone to bias and not easily reproducible. The purpose of this study was to develop a novel, quantitative and more accurate model to test the effect of adhesives on the retentive force of mandibular free end saddle partial dentures. METHODS: An in vitro model was developed based on an anatomically accurate cast of a clinical case...
May 17, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28526443/mechanical-properties-of-polymer-infiltrated-ceramic-sodium-aluminum-silicate-composites-for-dental-restoration
#20
Bencang Cui, Jing Li, Huining Wang, Yuanhua Lin, Yang Shen, Ming Li, Xuliang Deng, Cewen Nan
OBJECTIVE: To fabricate indirect restorative composites for CAD/CAM applications and evaluate the mechanical properties. METHODS: Polymer-infiltrated-ceramic composites were prepared through infiltrating polymer into partially sintered sodium aluminum silicate ceramic blocks and curing. The corresponding samples were fabricated according to standard ISO-4049 using for mechanical properties measurement. The flexural strength and fracture toughness were measured using a mechanical property testing machine...
May 17, 2017: Journal of Dentistry
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