Read by QxMD icon Read

American Journal of Dentistry

Juan Estay, Javier Martin, Patricio Vildósola, Claudia Villablanca, Ivar Mjör, Osmir Batista de Oliveira, Mark Laske, Bas Loomans, Marcelo Ferrarezi de Andrade, Gustavo Moncada, Valeria V Gordan, Niek Opdam, Eduardo Fernández
PURPOSE: To evaluate sealed amalgam and resin-based composite restorations after 12 years to determine whether sealing minor defects (micro-repairs) enhanced the longevity of restorations. METHODS: 34 subjects aged 18-80 were recruited. This sample group underwent 137 restorations, including 51 resin-based composite (RC) and 86 amalgam (AM) restorations. Existing restorations with localized, marginal defects were assigned to one of two groups: (a) the Sealing group (n=48, 27 AM; 21 RC) or (b) the Control group (n=89, 59 AM; 30 RC)...
April 2018: American Journal of Dentistry
Toshiyuki Suge, Shingo Shibata, Kunio Ishikawa, Takashi Matsuo
PURPOSE: To evaluate the acid resistance of various antibacterial ammonium hexafluorosilicate (SiF) solutions. METHODS: Antibacterial SiF solutions were prepared with the addition of chlorhexidine (CHX), cetylpyridinium chloride (CPC), isopropyl methylphenol (IPMP), or epigallocatechin gallate (EGCG). Hydroxyapatite pellets were treated with SiF solution with or without antibacterial agents for 3 minutes. The demineralized depth of hydroxyapatite pellets after SiF treatment was measured using a surface roughness analyzer...
April 2018: American Journal of Dentistry
Amir H Nejat, Jinwhan Lee, Shreya Shah, Chee Paul Lin, Prajakta Kulkarni, Ramakiran Chavali, Nathaniel C Lawson
PURPOSE: To evaluate the effect of different surface treatments and primers with a CAD/CAM resin composite block on its crown retention. METHODS: 120 human molars were prepared with a 24° total convergence angle, 1.5 mm height, and axial walls in dentin. Surface area was measured by digital microscopy. Crowns were machined from CAD/CAM resin composite blocks. Teeth were randomly allocated to 12 groups (n= 10) based on possible combinations of three surface treatments: [Control, Alumina air abrasion (50-µm Al₂O₃ at 0...
April 2018: American Journal of Dentistry
Burcu Acar, Ferhan Egilmez
PURPOSE: To investigate and compare the effects of several polishing systems and thermal cycling on the surface roughness and color change of various polymer-based CAD/CAM materials. METHODS: Bar-shaped specimens (GC CeraSmart, CS; Lava Ultimate, LU and Vita Enamic, VE) were prepared. All specimens were polished with SiC papers. The specimens in Group A served as control and no additional surface polishing was applied. Final polishing was performed using diamond polishing paste (Diapolisher Paste) in Group B...
April 2018: American Journal of Dentistry
Liang Chen, Jie Yang, Jingyuan Rebecca Wang, Byong In Suh
PURPOSE: To evaluate the physical and biological properties of a novel calcium silicate-based self-adhesive resin cement (TheraCem) by comparison with a traditional self-adhesive resin cement (UniCem 2) and a resin-modified glass-ionomer cement (FujiCEM 2). METHODS: pH of the cements was measured with moist pH strips. Antimicrobial activity was evaluated by a modified disk diffusion assay. Calcium release of TheraCem in water or lactic acid was measured with an ion selective pH meter for 56 days...
April 2018: American Journal of Dentistry
Charles Richard Parkinson, Pejmon Amini, Anto Jose, John Gallob
PURPOSE: To evaluate and compare gingival health, as measured by a bleeding index (BI), a modified gingival index (MGI), number of bleeding sites, and blood in expectorate following twice daily use of a non-aqueous 0.454% weight/weight (w/w) stannous fluoride dentifrice ('Test dentifrice') compared to a sodium monofluorophosphate (SMFP) dentifrice (' Negative Control') over 12 weeks, in subjects with moderate gingivitis and gingival bleeding following tooth brushing. METHODS: This was a single-center, examiner-blinded, randomized, stratified, two-treatment arm, parallel group, 12-week clinical study in healthy adult volunteers with moderate gingivitis who demonstrated gingival bleeding following tooth brushing...
April 2018: American Journal of Dentistry
Patrícia Hernandé-Gatón, Regina Guenka Palma-Dibb, Léa Assed Bezerra da Silva, Juliana Jendiroba Faraoni, Alexandra Mussolino de Queiroz, Marília Pacífico Lucisano, Raquel Assed Bezerra da Silva, Paulo Nelson Filho
PURPOSE: To evaluate the effect of ultrasonic, sonic and rotating-oscillating powered toothbrushing systems on surface roughness and wear of white spot lesions and sound enamel. METHODS: 40 tooth segments obtained from third molar crowns had the enamel surface divided into thirds, one of which was not subjected to toothbrushing. In the other two thirds, sound enamel and enamel with artificially induced white spot lesions were randomly assigned to four groups (n=10) : UT: ultrasonic toothbrush (Emmi-dental); ST1: sonic toothbrush (Colgate ProClinical Omron); ST2: sonic toothbrush (Sonicare Philips); and ROT: rotating-oscillating toothbrush (control) (Oral-B Professional Care Triumph 5000 with SmartGuide)...
April 2018: American Journal of Dentistry
Kimberly R Milleman, Avinash Patil, Martin R Ling, Stephen Mason, Jeffery L Milleman
PURPOSE: To monitor extrinsic stain formation over 24 weeks with twice-daily use of an anhydrous 0.454% SnF2 dentifrice containing 5% sodium tripolyphosphate (STP) ('Test'), compared to a standard fluoride dentifrice (0.76% fluoride as sodium monofluorophosphate [SMFP\) ('Comparator') following a professional prophylaxis. METHODS: Primary efficacy variables were between-treatment differences in extrinsic dental stain of anterior teeth after 4, 8, 12, and 24 weeks' use using mean area and intensity scores of the MacPherson modification of the Lobene stain index (MLSI), and to monitor oral tolerability...
April 2018: American Journal of Dentistry
Shinya Horiuchi, Hiromichi Yumoto, Tomoko Kimura, Minami Sato, Silvia Naomi Mitsui, Masahiro Hiasa, Eiji Nishikawa, Tarek El-Bialy, Eiji Tanaka
PURPOSE: To evaluate the effect of pulsed ultrasound toothbrush on the removal of biofilm formed by Streptococcus mutans (S. mutans). METHODS: S. mutans biofilm grown on apatite pellet was destructed with four different sonic action toothbrushes: 1) pulsed ultrasound with sonic vibration (PUV); 2) continuous ultrasound with sonic vibration (CUV); 3) sonic vibration only (SV); and 4) no ultrasound nor sonic vibration (control). After 3 minutes of noncontact brushing, the amount of water-insoluble glucan was measured, and the residual biofilm was observed by scanning electron microscopy...
April 2018: American Journal of Dentistry
Nicola West, Tao He, Nikki Hellin, Nicholas Claydon, Joon Seong, Emma Macdonald, Rachelle Eusebio
PURPOSE: To assess the anti-erosion effects of a 0.454% stannous fluoride dentifrice versus a marketed dentifrice in an in situ clinical study. METHODS: This was a double-blind, randomized and controlled, two-treatment, four-period crossover clinical study involving healthy adults. Each study period was 10 days. Subjects were randomized to one of two dentifrice products each period: an experimental 0.454% stannous fluoride dentifrice (1,100 ppm fluoride) or a marketed 1...
April 2018: American Journal of Dentistry
Junbo Xiang, Hongmei Li, Boqun Pan, Jinlan Chang, Yanyan He, Tao He, Ross Strand, Yunming Shi, Weili Dong
PURPOSE: To investigate the immediate penetration and bactericidal effect of two oral care products marketed in China on an intact natural plaque biofilm model at different time points. METHODS: Eight subjects (aged 20 to 30 years; Turesky Plaque Index Score 2 to 3) were enrolled in the study according to the inclusion criteria. Plaque accumulators were worn by the subjects for 6 and 48 hours for harvesting the dental biofilm. Then the biofilms from different groups were stained with the LIVE/DEAD BacLight fluorescence system to investigate the changes in thickness and fluorescence intensity of living bacteria in biofilm 5 and 15 minutes post-treatment with a mouthrinse containing 0...
February 2018: American Journal of Dentistry
Camila Cristina De Foggi, Marina Siqueira Bambini Ayres, Guilherme Paladini Feltrin, Janaina Habib Jorge, Ana Lucia Machado
PURPOSE: To investigate the influence of surface characteristics and saliva on the adhesion and biofilm formation of Candida glabrata and methicillin-resistant Staphylococcus aureus (MRSA) to soft liners and tissue conditioners. METHODS: For each material (Ufi Gel P - UG; Sofreliner S - SS; Trusoft - TR; Coe Comfort - CC; Softone - ST), specimens were prepared and roughness (Ra), hydrophobicity (water contact angles-WCA) and surface free energy (SFE) were measured...
February 2018: American Journal of Dentistry
Ammar M Alarwali, Muralithran G Kutty, Afaf Y Al-Haddad, Maria Angela G Gonzalez
PURPOSE: To evaluate the fracture resistance and failure mode of three different all-ceramic crowns; CEREC Bloc, IPS e.Max Press and Cercon in a simulated clinical situation. METHODS: 30 extracted maxillary premolars were prepared and randomly assigned to three groups equally according to the type of crown used. The first was the CEREC group: monolithic feldspathic crowns (CEREC Blocs). The second was the E.Max group: monolithic lithium disilicate crowns (IPS e...
February 2018: American Journal of Dentistry
Paul de Kok, Cornelis J Kleverland, Ruud H Kuijs, M Arife Öztoprak, Albert J Feilzer
PURPOSE: To investigate the effect of substrate and thickness on the fracture resistance of bonded dental restorative materials. METHODS: Cylindrical restorations (d = 4.0 mm) of resin composites Filtek Supreme XTE, Clearfil AP-X, Lava Ultimate and glass-ceramic IPS e.max CAD were fabricated at thicknesses of 0.5 mm, 1.0 mm and 2.0 mm respectively (n = 10 per group) and adhesively bonded to bovine enamel or dentin. The load to failure (LtF in N) of all specimens was determined in a universal testing machine and two one-way ANOVAs with a post hoc LSD tests and separate independent samples t-tests, performed at a significance level of 5%...
February 2018: American Journal of Dentistry
Sarah Buedel, Frank Lippert, Domenick T Zero, George J Eckert, Anderson T Hara
PURPOSE: To investigate the in vitro effects of simulated dentifrice slurry abrasivity (L-low, M-medium and H-high) and remineralization time (0, 30, 60 and 120 minutes) on erosive tooth wear. METHODS: Enamel and root dentin specimens were prepared from bovine incisors (n= 8) and submitted to a cycling protocol including erosion, remineralization at the test times, and brushing with each of the tested slurries, for 5 days. Dental surface loss (SL) was determined by optical profilometry...
February 2018: American Journal of Dentistry
Allegra Comba, Elena Manzon, Carlotta Giuliano, Elena Farina, Damiano Pasqualini, Ricardo Michelotto Tempesta, Elio Berutti, Nicola Scotti
PURPOSE: To evaluate the in vitro efficacy of surface coating sealer (SCS) in reducing the amount of water absorption and stain formation in resin composites. METHODS: To evaluate the amount of water sorption, 40 stainless steel round molds (n=10 per composite) were filled with Filtek Supreme XTE; Venus Diamond; Clearfil Majesty ES-2; Gradia Direct Anterior. Groups were further divided into two subgroups (n=5) according to the presence/absence of SCS (Easy Glaze)...
February 2018: American Journal of Dentistry
Charles Parkinson, Pejmon Amini, Jianming Wu, John Gallob
PURPOSE: To evaluate and compare gingival health, as measured by a bleeding index (BI), a modified gingival index (MGI), a dental plaque index (PI), and number of bleeding sites following twice daily use of an anhydrous 0.454% weight/weight (w/w) stannous fluoride dentifrice (Test Dentifrice) compared to a sodium monofluorophosphate (SMFP) dentifrice (Negative Control) over 24 weeks. METHODS: This was a single-center, examiner-blinded, randomized [by gender and baseline mean MGI score (Low ≤ 2...
February 2018: American Journal of Dentistry
Yuichi Kunimatsu, Junko Iizuka, Motoe Taniguchi, Yuko Mikuni-Takagaki, Yoshiharu Mukai
PURPOSE: To investigate the effects of in-office bleaching on the remineralization of enamel lesions filled with organic components of red wine. METHODS: Enamel specimens were exposed to 0.1% NaF solution for 1 minute immersed in red wine for 5 days at 37°C, and subjected to in-office bleaching followed by remineralization in 1.5 mM CaCl₂, 0.9 mM KH₂PO₄, 130 mM KCl, 20 mM HEPES, pH 7.0, at 37°C for 28 days. The presence of organic substances on the enamel surface was detected by Raman spectroscopy...
February 2018: American Journal of Dentistry
Bojana D Ramic, Milica T Premovic, Igor L Stojanac, Milan R Drobac, Ljubomir M Petrovic
PURPOSE: To verify the influence of placement and polymerization technique on the gap width between dentin and composite restoration. METHODS: Standardized cylindrical cavities (3 mm in diameter, 2 mm deep) with all margins in dentin were prepared on buccal and oral surfaces of 30 extracted human third molars. With regard to the different resin composite filling techniques used, the samples were randomly divided into three groups (n=20): bulk; incremental; pin. Each group was further subdivided into subgroups based on different light polymerization techniques): continuous (40 seconds); discontinuous (2 seconds of activation, followed by 10 seconds of dark interval, then light polymerization continued for 38 seconds)...
February 2018: American Journal of Dentistry
Gustavo Frainer Barbosa, Sabrina Santos
PURPOSE: To evaluate the color change caused by cigarette smoke in both microhybrid and nanohybrid resin composites of three different manufacturers (Z100, Z350, Charisma, and Opallis). METHODS: Samples of microhybrid (n= 40) and nanohybrid (n= 40) resin composites (A2) were prepared for each resin brand, totaling 240 samples. The samples were divided into subgroups: Control: control group without exposure; C5: five cigarettes, 25 minutes/ exposure; C10: 10 cigarettes, 50 minutes/ exposure; C20: 20 cigarettes, 100 minutes/ exposure...
February 2018: American Journal of Dentistry
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"