American Journal of Dentistry

PURPOSE: This systematic scoping review aimed to survey the literature to answer the following questions: which instruments were used to measure the color change; which teeth were assessed for color; what was the follow-up period, and in which country was the recently published tooth bleaching clinical trial performed? METHODS: This research was registered in the Open Science Framework. The following databases were searched: PubMed, Scopus, Web of Science, EMBASE, Cochrane Library, and LILACS...

PURPOSE: To compare the effects of different thicknesses of ceramic veneering on the light transmission of various monolithic zirconia and lithium disilicate materials used in esthetic restorations. METHODS: Zirconia (i.e., Katana UT, Katana HT, Prozir Diamond, Prozir HT, and Zenostar MO) and lithium disilicate specimens (i.e., Emax HT and Emax MO) were prepared at thicknesses of 0.5 mm, 0.8 mm, and 1.2 mm. Additionally, 0.8 mm-thick specimens and 0.3 mm-thick ceramic veneer were prepared for veneering groups...

PURPOSE: To evaluate the effect of cycling whitening toothpaste with cigarette smoking (WTCS) on the evolution of roughness, color, translucency, and gloss of microfilled, microhybrid, and nanofilled resin composites. METHODS: 15 specimens of Durafill - DVS, Empress Direct - ED, and Z350 - FZ were divided into three groups according to the toothpastes:: conventional, control group, (Colgate - C) and Whitening (Colgate Luminous White - CW and Oral B 3D White - OW) and roughness, color, translucency, and gloss were evaluated before and after the specimens were submitted to WTCS for 8 weeks...

PURPOSE: To evaluate the effect of whitening mouthrinses on the color change, whiteness change, surface roughness, and hardness of stained resin composites after different immersion times. METHODS: Three different resin composites (Estelite Σ Quick, G-Aenial Anterior, Omnichroma) were used to prepare a total of 90 samples (30 samples from each resin composite). The samples were kept in coffee for 12 days, then divided into three subgroups (Control, Crest 3D White, and Listerine Advanced White; n=10 each)...

PURPOSE: To evaluate in a retrospective practice-based clinical study, the effects of additional laser therapy on side effects following the removal of all four impacted third molars. The secondary objective was, based on those results, to rationalize a protocol for low-level laser therapy (LLLT) in terms of irradiation settings. METHODS: 96 subjects requiring simultaneous surgical removal of the four third molars were treated from 2017 to 2019. For each subject, one side was randomly assigned to laser treatment, the other receiving the placebo...

PURPOSE: To evaluate the role of improvement in inflammatory oxidative stress by periodontal therapy (NSPT) in chronic kidney disease (CKD) subjects. METHODS: 50 stable subjects of CKD (stage III-IV) and having chronic periodontitis were enrolled for the present study. Group A (control group) subjects who did not receive NSPT and Group B (test group) subjects who received NSPT. Oral hygiene instructions were given to both groups, malondialdehyde (MDA) in gingival crevicular fluid (GCF) and serum, albumin creatinine ratio (ACR), urine protein creatinine ratio (UPCR), pocket depth (PD), clinical attachment loss (CAL), plaque index (PI), gingival index (GI), Interleukin 1-beta (IL-1β), high sensitivity C-reactive protein (hs-CRP) in serum were assessed at baseline and 6 months...

PURPOSE: To evaluate the effect of material type, material thickness and cement shade on the final color of two different ceramic/glass-polymer-based CAD-CAM blocks over colored abutments. METHODS: Tested blocks (Vita Enamic-VE and Cerasmart-Cs) were cut in three different thicknesses (1, 1.5 and 2 mm), and cemented on two different shaded (B1 and C3) resin discs with three shades (A2-Universal, W-White, T-Translucent) of a self-adhesive resin cement. An additional 10 specimens were prepared for control (n= 370)...

PURPOSE: To evaluate the bonding interface and the remineralization potential of a bioactive restorative material on demineralized dentin compared to a conventional bulk-fill resin composite restoration. METHODS: Twelve caries-free human molars were used in this study. Specimens were randomly divided into two groups according to the type of restorative material used (n=12); an injectable resin-modified glass-ionomer restorative [Activa BioActive-Restorative (ABR) ] and a bulk-fill composite [3M Filtek One Bulk Fill Restorative, (BFC) ]...

PURPOSE: To devise a method for artificial biofilm formation using Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, and Streptococcus gordonii, as well as a method for evaluating the effects of various ingredients on the artificial biofilm. METHODS: An artificial biofilm was developed using P. gingivalis, T. forsythia, T. denticola, and S. gordonii, which was then observed using scanning electron microscopy and evaluated by microflora analysis...

PURPOSE: To test the efficacy of nitrogen doped-TiO₂ (N-TiO₂) nanoparticles (NPs) on teeth whitening under visible light irradiation. METHODS: N-TiOV₂ NPs were prepared by the sol-gel method, using TiN as a precursor. Their light absorbance and crystal structures were characterized. Photocatalytic reactions were tested using methylene blue (MB) and extracted teeth. For the extracted teeth, carbomer gel, without or with 3% H₂O₂, and light irradiated, with subsequent evaluation of the color differences...

PURPOSE: To test the feasibility of nitrogen-doped TiO₂ nanoparticles in the killing of Streptococcus mutans (S. mutans) for short term treatment. METHODS: For the study, S. mutans were treated with the combinations of N-TiO₂, visible light, and without/with 0.5% H₂O₂ inclusion. Visible light was irradiated for 3 minutes one time. RESULTS: Methylene blue solution was degraded (bleached) 5-30% by one of N-TiO₂ (or TiO₂) + visible laser (405 or 660 nm) +0...

PURPOSE: To evaluate the fracture resistance of endodontically treated premolars restored with CAD-CAM onlay restorations. METHODS: 60 extracted mandibular first premolars were selected and at first divided into three groups regarding treatment options: MOD onlay with buccal cusp coverage, MOD onlay with buccal cusp coverage + endodontic treatment, MOD onlay with buccal cusp coverage + endodontic treatment + fiber post. Then, all groups were divided into subgroups (n=10) according to the restorative material used: IPS e...

PURPOSE: To evaluate the antiplaque effects for 0.454% bioavailable gluconate chelated stannous fluoride (SnF₂) dentifrices versus controls by clinical model, plaque index, tooth surface and tooth type in a pooled analysis. METHODS: Randomized controlled trials (RCTs) were conducted to evaluate plaque effects of SnF₂ dentifrices from the same formulation family over the past 30 years. Forty-four 4-day and longer-term (≥ 2 weeks) RCTs conducted in six countries with 3,336 subjects using Turesky Modified Quigley-Hein Plaque Index, Rustogi Modification of the Navy Plaque Index, Digital Plaque Imaging Analysis, and Silness and Löe Plaque Index were included...

PURPOSE: To evaluate the influence of brushing with a specific antiseptic soap solution on the surface (roughness and hardness) and biological properties of a specific hard chairside reline resin. METHODS: The hard chairside reline resin specimens were made and distributed to the following groups according to disinfectant solution: sodium hypochlorite 0.5% (SH), Lifebuoy solution 0.78%; experimental group (LS) and phosphate-buffered saline PBS to be submitted to the brushing cycle for 10 seconds...

PURPOSE: To evaluate and compare in vitro and in vivo color parameters of hybrid ceramic, resin nanoceramic, and artificial acrylic resin teeth. METHODS: For the in vitro stages, 120 specimens (2 mm) were prepared from Vita Enamic (VE), Lava Ultimate (LU), CeraSmart (CS), and acrylic teeth (IV), and immersed in coffee, red wine, and distilled water for 24, 72, and 144 hours. For the in vivo stage, 16 individuals received a complete denture that had upper premolars made of VE, LU, CS blocks, and IV...

PURPOSE: To evaluate and compare the bonding of flowable resin composites and light-cured resin cements to dental ceramics. METHODS: Grit-blasted zirconia plates were primed with MDP-containing adhesive. Lithium disilicate glasses plates were etched with HF and primed with silane. Two flowable resin composites with high (CM: 75 wt%/62 vol%) and low (BF: 67.3 wt%/47 vol%) filler contents, and two resin cements, again with high (C: 72 wt%/69 vol%) and low (R: 66 wt%/47 vol%) filler contents, were bonded to both types of pretreated ceramics...

PURPOSE: To evaluate the microbial air quality during dental clinical procedures in a large clinical setting with increasing patient capacity. METHODS: This was a single-center, observational study design evaluating the microbial air quality and aerosol distribution during normal clinical sessions at 5% (sessions 1 and 2) and at > 50% (session 3) treatment capacity of dental aerosol generating procedures. Sessions 1 and 2 were evaluated on the same day with a 30-minute fallow time between the sessions...

PURPOSE: To compare the autofluorescence (AF) spectra of resin products with teeth to determine if this type of non-invasive testing is feasible for differentiating resin products from teeth during resin repair. METHODS: For the study, 11 methacrylate-based resin products were chosen. A 405 nm laser was used to induce AF, and a spectrophotometer and a qualitative laser-induced fluorescence (QLF) camera were used to obtain AF spectra and images, respectively. RESULTS: Resin products and teeth showed one or two emission peak(s) at 435-465 nm and 475-480 nm, respectively...

PURPOSE: This retrospective clinical study evaluated, by radiographic analysis, the effect of unfiltered and filtered tobacco cigarette smoking on marginal bone loss (MBL) in the subjects with dental implants. METHODS: In a 4-year retrospective clinical study, 419 dental implants were placed in 188 subjects aged 23-76 years who underwent implant-supported fixed prosthetic restorations. The effects of gender, implant length, implant diameter, implant location, and use of unfiltered and filtered tobacco cigarettes on marginal bone were investigated...

PURPOSE: To evaluate two agents for bonding denture bases and teeth manufactured either by stereolithography (SLA) or by the subtractive mixed technique. METHODS: Two types of cylinders [small for the tooth resin and large for the base resin) were designed using CAD software according to the ANSI/ADA 15-2008 (R2013)] specification. For SLA manufacturing, 30 small cylinders were shaped with Denture Teeth resin and 30 large cylinders with Denture Base resin. For the mixed technique, 30 large cylinders were manufactured by SLA with V-print dentbase resin, and 30 small cylinders were milled with a CediTEC DT disk...