Evaluation of viscoelastic properties, hardness, and glass transition temperature of soft denture liners and tissue conditioner
This study assessed methods for the evaluation of the viscoelasticity and glass transition temperature (Tg) of the silicone permanent soft liner, acrylic permanent soft liner, and tissue conditioner. Three rheological parameters of storage modulus (E′), loss modulus (E′′), and loss tangent (\(\tan \delta\)),Tg, and hardness were determined using dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and the Shore A0 hardness test. Five specimens were measured for each material. The time –temperature superposition principle was applied to produce master curves ofE′,E′...
Source: Odontology - December 5, 2019 Category: Dentistry Source Type: research

Recognizing the peak bone mass (age 30) as a cutoff point to achieve the success of orthodontic implants
AbstractThe aim of present study was to investigate the critical risk factor (age 30: peak bone mass) to evaluate the success of orthodontic implants. A total of 426 orthodontic implants were placed in 270 patients as orthodontic anchorages. Data were analyzed according to patient ’s characteristics, location of placement, implant categories, and orthodontic force. The young patients were the age ≤ 30 years and the older patients were the age >  30 years. Statistical analysis was performed and ap value    30 years. The overall success rate (with and witho...
Source: Odontology - December 4, 2019 Category: Dentistry Source Type: research

Genetic polymorphisms influence gene expression of human periodontal ligament fibroblasts in the early phases of orthodontic tooth movement
This study evaluated, if genetic polymorphisms inRANK, RANKL, OPG, COX2 andIL6 are associated with the expression of RANKL, OPG, COX2 and IL6 by human periodontal ligament (hPDL) fibroblasts during OTM. Primary hPDL fibroblasts from periodontal connective tissue of teeth extracted from 57 human subjects for medical reasons were collected, isolated, cultivated and characterized. To simulate orthodontic forces in PDL pressure areas, a physiological compressive force of 2  g/cm2 was applied to the hPDL fibroblasts under cell culture conditions at 70% confluency for 48  h, using a glass disc. Thereafter we analysed rela...
Source: Odontology - November 18, 2019 Category: Dentistry Source Type: research

Hydroxyapatite –collagen augments osteogenic differentiation of dental pulp stem cells
The objectives of this study were to isolate and culture dental pulp stem cells (DPSCs) and to investigate their proliferation and osteogenic differentiation on hydroxyapatite –collagen (HA–Col) scaffold. DPSCs were characterized by fluorescence-activated cell sorting (FACS). Cultured cells were CD73+, CD90+, CD105+ and CD31−, CD45−. A commercially available HA –Col scaffold was used for culture of DPSCs. Cell attachment and viability of DPSCs cultured on scaffold was studied by sulforhodamine assay. Osteoblast differentiation capacity was studied by alkaline phosphatase assay and the effects ...
Source: Odontology - November 16, 2019 Category: Dentistry Source Type: research

Consumption of snacks and dental caries among Finnish young men: a cross-sectional epidemiological study
AbstractThe aim of this study was to investigate the frequency of consumption of snack products, as well as the association between snacking and restorative treatment need, and associated factors among a healthy Finnish male population. Approximately 8500 conscripts answered a computer-based questionnaire covering their snacking habits and other health behaviours. Restorative treatment need and history (DT, DMFT) were examined by trained and calibrated dentists. Cross-tabulations were used to investigate the associations between snacking habits and the other researched variables, and logistic regression analyses (odds rati...
Source: Odontology - November 12, 2019 Category: Dentistry Source Type: research

Dynamic microstructural changes in alveolar bone in ligature ‐induced experimental periodontitis
This study used a ligature ‐induced experimental periodontitis model to observe the kinetic process of microstructural changes in alveolar bone and introduced star volume analysis as a new methodology to assess microstructural changes. Thirty Wistar rats were used. To induce experimental periodontitis, ligatures were placed around the maxillary first molar. Rats were euthanized on days 0, 1, 3, 7, 14, and 28 after ligature placement. In addition to using hematoxylin and eosin staining, tartrate-resistant acid phosphatase (TRAP)/alkaline phosphatase (ALP) double staining, and micro-computed tomography were performed to an...
Source: Odontology - November 12, 2019 Category: Dentistry Source Type: research

Temperature changes on the root surface during application of warm vertical compaction using three different obturation units
This study aimed to determine the temperature increase on the root surface during warm vertical compaction using three different obturation systems. Forty-five human single-rooted premolars were randomly assigned to one of three experimental groups of 15 teeth each for obturation with a System B unit, an Elements Obturation Unit, or a B&L SuperEndo Alpha II unit. All teeth were filled using the continuous wave of condensation technique with a set temperature of 200  °C. The temperature measurements were made with an infrared camera at 3 s (T0) and 1  min (T1) following activation of the heat plugger....
Source: Odontology - November 9, 2019 Category: Dentistry Source Type: research

Prevalence of and risk factors for postoperative hemorrhage after lower third molar extraction on warfarin therapy: a multicenter retrospective study in Japan
AbstractPostoperative hemorrhage after tooth extraction is a critical and clinically important issue for clinicians and patients receiving anticoagulants. The purpose of the present study was to investigate the prevalence of and risk factors for postoperative hemorrhage after lower third molar extraction in Japanese patients receiving warfarin therapy. A total of 142 patients who underwent lower third molar extraction between January 2010 and December 2016 were included, and their medical records were retrospectively reviewed. The prevalence of and risk factors for postoperative hemorrhage were investigated. The prevalence...
Source: Odontology - November 8, 2019 Category: Dentistry Source Type: research

IL-10 secreting B cells regulate periodontal immune response during periodontitis
AbstractPeriodontitis is a disease caused by periodontopathogens and is characterized by periodontal inflammation and alveolar bone resorption. As has been proven, host immune responses incite the development and progression of periodontitis. The present study sought to establish B10 cell functions and mechanisms in regulating host immunity during periodontitis. Periodontopathogen-specific B10 cells were purified and then injected into recipients to create the adoptive transfer models. We compared inflammatory cytokines and regulatory T (Treg)/Th17 cell expression in a healthy, normal model, an experimental periodontitis m...
Source: Odontology - November 7, 2019 Category: Dentistry Source Type: research

Colorimetric study about the stratification ’s effect on colour perception of resin composites
AbstractTo evaluate the influence of a different order of dentin and enamel layers on stratification appearance of different resin composites. 144 Dentin (D) and Enamel (E) composite samples (Clearfil Majesty ES-2 Premium, Brilliant EverGlow, Estelite Asteria), 1  mm thick, were divided into 12 configurations for each composite, with Enamel–Dentin–Dentin–Enamel (EDDE) assumed as target. The colour specification was conducted using a spectrophotometer, elaborating the results with the CIEL*a*b* colour coordinates and calculating the colour difference in terms of\(\Delta E_{ab}^{*}\) quantity. A value ...
Source: Odontology - October 29, 2019 Category: Dentistry Source Type: research

Clinical efficacy of an Aloe Vera gel versus a 0.12% chlorhexidine gel in preventing traumatic ulcers in patients with fixed orthodontic appliances: a double-blind randomized clinical trial
This report represents a single-centre, university-based, double-blinded, randomized controlled trial with 2 parallel arms. Patients aged 12  years or older, in the permanent dentition, and about to start fixed orthodontic treatment in this university setting were randomly allocated to use either Aloe Vera or CHX gel, following the cementation procedure. Pre-treatment and 1 month after the cementation clinical assessment and digital pho tographic images were taken of the teeth and assessed by 2 clinical assessors for the presence or absence of TOUs. A total of 140 were randomized and completed the trial. The overall p...
Source: Odontology - October 29, 2019 Category: Dentistry Source Type: research

Immunohistochemical assessment of Eph/ephrin expression in oral squamous cell carcinoma and precursor lesions
AbstractTo evaluate erythropoietin-producing hepatocellular carcinoma (Eph)/Eph receptor-interaction protein (ephrin) expression in oral squamous cell carcinoma (OSCC) and oral epithelial precursor lesions (OEPLs), EphA2, EphB4, and ephrinB2 were examined and compared with microvessel density (MVD) and lymphatic vessel density (LVD). Samples from 73 OSCC and 43 OEPLs patients were immunohistochemically analyzed with antibodies against EphA2, EphB4, ephrinB2, CD34, and D2-40. Results were compared with clinicopathological findings. Immunohistochemical reactivity for EphA2, EphB4, and ephrinB2 was detected in epithelial cell...
Source: Odontology - October 25, 2019 Category: Dentistry Source Type: research

Targeted polymerase chain reaction-based expression of putative halitogenic bacteria and volatile sulphur compound analysis among halitosis patients at a tertiary hospital in Nigeria
This study determines the presence of five putative periodontal pathogens viz:Actinobacillus actinomycetemcomitans,Fusobacterium nucleatum,Porphyromonas gingivalis,Prevotella intermedia andTreponema denticola on the tongue dorsa of halitosis and non-halitosis patients using a 16S rDNA-directed polymerase chain reaction assay. Furthermore, an association of these bacteria with oral malodour [as assessed by volatile sulphur compounds (VSC) measurements] with a portable sulphide monitor, the Halimeter (Interscan Corp, Chatsworth, California), was performed. The results showed that the prevalence of halitosis in this environme...
Source: Odontology - October 22, 2019 Category: Dentistry Source Type: research

Cytotoxic effects of a chlorhexidine mouthwash and of an enzymatic mouthwash on human gingival fibroblasts
AbstractThe aim of this study was to evaluate the cytotoxic effects of an enzymatic mouthwash and of a chlorhexidine mouthwash on human gingival fibroblasts. The metabolic activity of the fibroblasts exposed to each mouthwash was assessed by the MTT assay and the protein content was assessed by the SRB assay. The flow cytometry was used to evaluate the cell cycle and the types of cell death. The oxidative status was evaluated through the DCF and the DHE probes and the intracellular GSH concentration and the mitochondrial membrane potential through JC-1. The cytotoxicity of both mouthwashes was found to be dependent on the ...
Source: Odontology - October 17, 2019 Category: Dentistry Source Type: research

Surface roughness and wear behavior of occlusal splint materials made of contemporary and high-performance polymers
AbstractWith the development of a digital technology of computer-assisted manufacturing (CAD/CAM) and new age materials, the use of new types of occlusal splint is to consider. The aim of the present study was to evaluate the surface roughness (Ra) and wear behavior of different CAD/CAM materials against enamel antagonist through a simulated chewing test. A total of 75 specimens made from ethylene vinyl acetate (EVA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyetheretherketone (PEEK), and polyethyleneterephthalate (PETG) as a control were polished to evaluate the Ra before loading by optical profilometry and f...
Source: Odontology - October 14, 2019 Category: Dentistry Source Type: research

Dexamethasone-loaded hollow hydroxyapatite microsphere promotes odontogenic differentiation of human dental pulp cells in vitro
AbstractA sustained-release system was established by synthesis of dexamethasone-loaded hollow hydroxyapatite microspheres (DHHAM). The in vitro effect of DHHAM on odontogenic differentiation of human dental pulp cells (hDPCs) was evaluated. Hollow hydroxyapatite microspheres (HHAM) are successfully manufactured using simple biomimetic one-step strategy in the presence of glycine and sodium dodecyl sulfonate. Dexamethasone (DEX) was loaded to the system after the formation of HHAM. The drug encapsulation capacity of DEX in HHAM is 40.3% and its loading efficiency is 16.7%. The cumulative release of DEX in vitro is 55% up t...
Source: Odontology - October 9, 2019 Category: Dentistry Source Type: research

Periodontitis and vascular inflammatory biomarkers: an experimental in vivo study in rats
The objective of this preclinical in vivo study was to determine changes in vascular inflammatory biomarkers in systemic circulation after injection of lipopolysaccharide (LPS) fromPorphyromonas gingivalis (Pg) in rats. Experimental periodontitis was induced by injections ofPg-LPS. Gingival soft and hard tissues changes were analysed by means of magnetic resonance imaging and micro computed tomography. Serum levels of interleukin (IL)-6, IL-10, pentraxin (PTX) 3, and soluble fragment of tumor necrosis factor-like weak inducer of apoptosis (sTWEAK) were determined at baseline and 24  h, 7, 14, and 21 days after pe...
Source: Odontology - October 3, 2019 Category: Dentistry Source Type: research

Maxillary sinus size and posterior tooth inclination in Japanese orthodontic patients with agenesis of maxillary second premolars
AbstractThe purpose of this study was to investigate the expansion of the maxillary sinus and the inclinations of posterior teeth in orthodontic patients with maxillary second premolar agenesis. A total of 30 subjects with one or two congenitally missing maxillary second premolars and retained maxillary deciduous second molars (a agenesis group) were selected and divided into a unilateral agenesis group (20 subjects with one maxillary second premolar missing) and a bilateral agenesis group (10 subjects with two maxillary second premolars missing). As controls, 30 sex- and age-matched subjects without agenesis of the maxill...
Source: Odontology - October 3, 2019 Category: Dentistry Source Type: research

Evaluation of fracture strength for single crowns made of the different types of lithium disilicate glass –ceramics
In conclusion, the fracture strength of Amber Lisi-POZ crown with zirconia framework was the highest, and the buccal cusps fractured from the cen tral groove of the all crowns. Weibull modulus of crowns produced by milling was higher than those of crowns produced by heat-pressing. (Source: Odontology)
Source: Odontology - September 28, 2019 Category: Dentistry Source Type: research

The number and kind of antiepileptics affect propofol dose requirement for anesthesia: observational study
AbstractThe propofol dose requirement and the emergence time are affected by antiepileptic use. The effects on anesthesia of the number and kind of antiepileptic agents have not been reported. We investigated the relationship between the kind and number of antiepileptic agents and the propofol dose requirement for anesthesia and emergence time in intravenous general anesthesia for dental treatment for patients with neurological disorders. We studied 247 patients with neurological disorders who underwent dental treatment under intravenous general anesthesia. Patients were categorized according to the number of antiepileptic...
Source: Odontology - September 27, 2019 Category: Dentistry Source Type: research

A pilot study to assess oral colonization and pH buffering by the probiotic Streptococcus dentisani under different dosing regimes
AbstractBacterial colonization in the oral cavity is critical for efficient action of probiotics. However, limited colonization rates have been reported in many clinical trials. The aim of this pilot clinical study was to evaluate the colonization efficiency ofStreptococcus dentisani under different dosing schedules and pre-treatment conditions. Eleven adult volunteers enrolled in the study. A professional ultrasound cleaning was performed in quadrants 1 and 4. The probiotic was applied in all four quadrants at a total dose of 1010 CFUs, administered in a buccoadhesive gel for 5  min, either in a single dose (n&thinsp...
Source: Odontology - September 17, 2019 Category: Dentistry Source Type: research

Surface deformation of several nickel –titanium rotary instruments after removal of the root canal filling materials: a scanning electron microscope evaluation
AbstractThe aim of the present study was to investigate and compare the surface deformations of different NiTi rotary files after retreatment under scanning electron microscope (SEM). A total of 240 upper central incisor teeth were obturated with vertical compaction technique and divided into 6 groups. Root canals were retreated by ProTaper Next (PTN), Twisted File Adaptive (TFA), Reciproc (RPC), ProTaper Universal Retreatment (PTR), R-Endo and Mtwo-R NiTi rotary systems. The files investigated under SEM at different magnifications and photomicrographs were captured. The photomicrographs were classified and scored. Kruskal...
Source: Odontology - September 17, 2019 Category: Dentistry Source Type: research

Accumulated cytotoxicity of CDK inhibitor dinaciclib with first-line chemotherapy drugs in salivary adenoid cystic carcinoma cells
The objective of this study was to determine the potential additive anti-cancer effect of a novel CDK inhibitor dinaciclib with first-line chemotherapy drugs in ACC. Protein expression of phosphorylated CDK2 (p-CDK2) in paraffin-embedded tissue specimens of ACC from 17 patients was investigated by immunohistochemistry (IHC). Cell Counting Kit (CCK-8), clone formation assay, and flow cytometry were used to test the proliferation and apoptosis of ACC-2 cells treated with dinaciclib with or without other first-line chemotherapy drugs. Protein expression was also determined by Western blot. Interestingly, we discovered that p-...
Source: Odontology - September 16, 2019 Category: Dentistry Source Type: research

Antimicrobial and antibiofilm effects of abietic acid on cariogenic Streptococcus mutans
This study aimed to evaluate the inhibitory effects of abietic acid, a diterpene derived from pine rosin, on the in vitro growth of cariogenic bacterial species,Streptococcus mutans. The effective minimum inhibitory concentration of abietic acid was determined through observation ofS. mutans growth, acidification, and biofilm formation. The inhibitory effects of abietic acid on the bacterial membrane were investigated through the use of in situ viability analysis and scanning electron microscopic analysis. Cytotoxicity of abietic acid was also examined in the context of several human cell lines using tetrazolium reduction ...
Source: Odontology - September 13, 2019 Category: Dentistry Source Type: research

Effect of autoclave sterilization on cyclic fatigue and torsional fracture resistance of NiTi rotary instruments
AbstractThe purpose of this study is to assess the effect of autoclave sterilization on the cyclic fatigue and torsional fracture resistance of ProTaper Universal (PTU), K3XF, HyFlex EDM (EDM), and TF adaptive (TFA). Sixty instruments from each file type were divided into two categories for cyclic fatigue group (CGr) and torsional fracture group (TGr). CGr and TGr were divided into three subgroups, respectively, consisting of ten instruments from each file type. Cyclic fatigue fracture test was performed using artificial canal made of stainless steel, and the mean number of cycles to failure (NCF) were determined. CGr1, th...
Source: Odontology - September 11, 2019 Category: Dentistry Source Type: research

Comparison of torque, force generation and canal shaping ability between manual and nickel-titanium glide path instruments in rotary and optimum glide path motion
This study aimed to analyze force/torque generation and canal volume changes of NiTi rotary glide path preparation using HyFlex EDM Glide Path File in comparison to manual stainless steel K-file instrumentation. Thirty extracted mandibular incisors with a minimally curved and narrow root canal were randomly divided into three groups (n = 10) according to the instrumentation kinematics: Optimum Glide Path motion (OGP) or continuous rotation (CR) with HyFlex EDM Glide Path Files using a custom-made automated-root-canal-preparation device and manual instrumentation with stainless steel K-files (SS) in watch-wind...
Source: Odontology - September 10, 2019 Category: Dentistry Source Type: research

Japanese subgingival microbiota in health vs disease and their roles in predicted functions associated with periodontitis
AbstractThe present study aimed to identify and compare the microbial signatures between periodontally healthy and periodontitis subjects using 454 sequences of 16S rRNA genes. Subgingival plaque samples were collected from ten periodontally healthy subjects and ten matched chronic periodontitis patients. Bacterial DNA was extracted and next-generation sequencing of 16S rRNA genes was performed. The microbial composition differed between healthy subjects and periodontitis patients at all phylogenetic levels. Particularly, 16 species, includingLautropia mirabilis andNeisseria subflava predominated in healthy subjects, where...
Source: Odontology - September 9, 2019 Category: Dentistry Source Type: research

Comparison of the antibacterial activity of calcium silicate- and epoxy resin-based endodontic sealers against Enterococcus faecalis biofilms: a confocal laser-scanning microscopy analysis
This study assessed the antibacterial activity of BioRoot RCS in comparison with that of the Totalfill BC and AH Plus sealers againstEnterococcus faecalis biofilms in dentinal tubules using confocal laser-scanning microscopy. Sixty-six root dentin halves were prepared and sterilized. Three sections were used to ensure sterilization. The remaining were inoculated withE. faecalis. Three specimens were examined to verify the viability of biofilms. The sixty specimens were randomly divided into four groups: AH Plus, BioRoot RCS, Totalfill BC sealer, and no sealer. The specimens were incubated for 1, 7, and 30  days. The s...
Source: Odontology - September 7, 2019 Category: Dentistry Source Type: research

Surface nanoscale profile of WaveOne, WaveOne Gold, Reciproc, and Reciproc blue, before and after root canal preparation
This study aimed to compare the surface topographies and nanoscale profiles of intact and used WaveOne, WaveOne Gold, Reciproc, and Reciproc blue nickel –titanium (NiTi) instruments. Sixteen NiTi instruments were evaluated; four from each one of WaveOne (25/0.08), WaveOne Gold (25/0.07), Reciproc (25/0.08), and Reciproc blue (25/0.08) files. Each instrument was used to prepare four curved canals. A three-dimensional nanoscale surface profiler was used to assess instrument surfaces before and after root canal instrumentation. The data were analyzed with one-way analysis of variance using SPSS 21.0 software and set sig...
Source: Odontology - September 7, 2019 Category: Dentistry Source Type: research

Effect of adding vasopressin on the distribution of lidocaine in tissues, anesthetic action, and circulatory dynamics
We examined whether vasopressin affects the distribution, anesthesia duration, and circulatory dynamics of lidocaine. Blood flow was measured after injecting 0.003, 0.03, or 0.3  U/mL vasopressin and 2% lidocaine (L) to the upper lip of rats. Radioactivity and distribution of14C-labeled L (CL) in the palate, palatal mucosa, maxilla bone, and blood was measured by autoradiography after injecting CL and CL  + 0.03 U/mL vasopressin. To evaluate anesthesia duration, somatosensory-evoked potentials, blood pressure, and pulse rate were measured after L, 0.03 U/mL vasopressin, and L + 0.03 U/mL va...
Source: Odontology - August 26, 2019 Category: Dentistry Source Type: research

Use of the Er,Cr:YSGG laser for removing remnant adhesive from the enamel surface in rebonding of orthodontic brackets
AbstractThe aim of this study was to compare the use of the Er,Cr:YSGG laser with the use of adhesive-removing pliers for removing remnant adhesive from the enamel surface. A total of 54 sound premolars were divided into two groups of 27. Each group was assigned one of two adhesive removal systems: the Er,Cr:YSGG laser, and adhesive-removing pliers. Shear bond strength was measured 24  h after bracket bonding, with the bracket bonding/debonding and residual adhesive removal procedures repeated twice after the first adhesive removal. Before the first bonding and after each adhesive removal procedure, the average surfac...
Source: Odontology - August 26, 2019 Category: Dentistry Source Type: research

Impact of new cross-sectional designs on the shaping ability of rotary NiTi instruments in S-shaped canals
AbstractThe aim was to compare the shaping ability of different rotary nickel –titanium instruments in simulated S-shaped canals. One hundred S-shaped canals in resin blocks were prepared to an apical size 25 using F6 SkyTaper (Komet), Silk Files .04, Silk Files .06, Prototypes .04, and Prototypes .06 (all Mani) (20 canals/group). Material removal was measured at 20 measuri ng points, beginning 1 mm from the endpoint of preparation. Incidence of canal aberrations, preparation time, and instrument failures were also recorded. Statistical analyses were performed using ANOVA, Student–Newman–Keuls and Ch...
Source: Odontology - August 24, 2019 Category: Dentistry Source Type: research

Parental influence is the most important predictor of child ’s orthodontic treatment demand in a preadolescent age
AbstractThe aim was to explore the predictive value of objective treatment need, impaired quality of life, and parental influence on orthodontic treatment demand in preadolescents and adolescents. A secondary goal was to validate 16-item Child Perceptions Questionnaire for the 11 –14 year age group (CPQ11-14): item-impact and stepwise-regression short-forms. A convenience sample of 287 participants (55% female) was used for validation. Internal consistency, test–retest reliability, and convergent validity were evaluated. Predictors of treatment demand were explored in 1 97 orthodontic patients: 93 preadole...
Source: Odontology - August 23, 2019 Category: Dentistry Source Type: research

Clinical factors affecting the translucency of monolithic Y-TZP ceramics
AbstractThe use of monolithic yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics in aesthetically critical regions is questionable because of the insufficient translucency and opacity of the restorations. Intrinsic (manufacturing process) and extrinsic factors (laboratory procedures and clinical factors) can affect the translucency of monolithic zirconia. In this narrative review, the clinical factors (thickness, cementation type, colour of the monolithic zirconia, surface finishing methods and wear, dental background, cement colour, low temperature degradation) affecting the translucency of monolithic Y-TZ...
Source: Odontology - August 10, 2019 Category: Dentistry Source Type: research

YouTube information about diabetes and oral healthcare
AbstractDiabetes mellitus is a chronic disease that is increasing at an alarming rate all over the world. The aim of this study was to assess the quality information available on YouTube on diabetes and oral healthcare. This cross-sectional study made a search in YouTube (https://www.youtube.com/). Two reviewers assessed the videos and categorized them into useful, misleading or personal experience, and scored them using a global quality scale (GQS) from 1 to 5 according to their overall quality (1  = poor quality; 5 = excellent quality). The source of each video was also registered, as was user...
Source: Odontology - August 8, 2019 Category: Dentistry Source Type: research

Non-invasive intravital observation of lingual surface features using sliding oral mucoscopy techniques in clinically healthy subjects
AbstractTo investigate intravital morphological features of the broader area of the lingual mucosa in clinically healthy subjects, and to attempt to evaluate subclinical conditions, we evaluated detailed intravital morphological features of the lingual mucosa using our newly developed oral contact mucoscopy techniques. Clinically healthy subjects (female: 19 –22 years, average age: 20.27 years, andn = 28) were enrolled. A position indicator stain was placed on the lingual mucosal surface, and sliding images were captured and then reconstructed. In addition, the lingual mucosa was divided into ...
Source: Odontology - July 15, 2019 Category: Dentistry Source Type: research

Morphological characteristics of radicular cysts using computed tomography
AbstractThe purpose of this study was to evaluate computed tomography (CT) findings of radicular cysts with a focus on location, size, and condition of the surrounding bone. Subjects comprised 60 men and 86 women (mean age 47.2  years) with histopathologically confirmed radicular cysts who underwent CT examination between 2012 and 2014. Mesiodistal and buccolingual diameters were measured at the location where the lesion appeared to be largest on CT axial images. Of the 146 cases, 103 lesions were in the maxilla and 43 we re in the mandible. Mesiodistal diameter of the maxillary lesions was significantly larger than t...
Source: Odontology - July 10, 2019 Category: Dentistry Source Type: research

Changes in quality of life induced by tooth whitening are not influenced by global self-esteem: a randomized double-blind placebo-controlled trial
AbstractThe purpose of this paper is to investigate which elements of tooth colour are most influenced by whitening and to identify the short-term changes in satisfaction with smile aesthetics and quality of life induced by tooth whitening and the role of global self-esteem. Sixty participants were randomly assigned to a treated or a placebo group (each groupN = 30). Their anterior teeth were bleached with a photo-activated whitening gel, or subjected to a placebo. Lightness, chroma and the translucency of teeth were assessed before and 1 week after the procedure using a spectrophotometer. The Self-Estee...
Source: Odontology - July 9, 2019 Category: Dentistry Source Type: research

A clinical study on the 6-year outcomes of immediately loaded three implants for completely edentulous mandibles: “the all-on-3 concept”
The objective of the current study was to demonstrate the 6-year clinical and radiological treatment outcomes of the technique performed by immediately loading of three implants (single straight in the mid-line and two tilted distal implants) for the management of total edentulous mandibles and introduce a simple decision matrix for selection of the most appropriate protocol in cases with insufficient length of the interforaminal area. Re-assessments were performed over a total observation period of 6  years after surgery via measurement of bone resorption around implants, bleeding on probing, plaque accumulation, per...
Source: Odontology - July 5, 2019 Category: Dentistry Source Type: research

Estrogen signaling impacts temporomandibular joint and periodontal disease pathology
AbstractWomen experience a higher incidence of oral diseases including periodontal diseases and temporomandibular joint disease (TMD) implicating the role of estrogen signaling in disease pathology. Fluctuating levels of estrogen during childbearing age potentiates facial pain, high estrogen levels during pregnancy promote gingivitis, and low levels of estrogen during menopause predisposes the TMJ to degeneration and increases alveolar bone loss. In this review, an overview of estrogen signaling pathways in vitro and in vivo that regulate pregnancy-related gingivitis, TMJ homeostasis, and alveolar bone remodeling is provid...
Source: Odontology - July 3, 2019 Category: Dentistry Source Type: research

An update on applications of 3D printing technologies used for processing polymers used in implant dentistry
This article reviews the main polymer AM technologies in implant dentistry, as well as their applications in the field such as manufacturing surgical guides, custom trays, working implant casts, and provisional restorations. (Source: Odontology)
Source: Odontology - July 1, 2019 Category: Dentistry Source Type: research

Relationship between TNF- α, MMP-8, and MMP-9 levels in gingival crevicular fluid and the subgingival microbiota in periodontal disease
This study evaluated the composition of periodontal microbiota with the checkerboard hybridization technique and its correlation with TNF-α, MM P-8, and MMP-9 evaluated with ELISA, of 80 patients (45 healthy, and 35 with chronic periodontitis). The frequency of the 18 species evaluated was higher in patients with bone loss compared with control group. TNF-α in gingival crevicular fluid was significantly higher in bone loss group (p 
Source: Odontology - June 18, 2019 Category: Dentistry Source Type: research

Properties of fucoidans beneficial to oral healthcare
AbstractFucoidans are sulfated polysaccharides that are found in marine algae and have many useful activities, including antitumor effects, promotion of apoptosis of cancer cells, and antiviral, anti-inflammatory, and antiallergic actions. In oral medicine, several case reports have shown that fucoidan-containing creams and tablets markedly improved recurrent aphthous stomatitis, symptomatic inflamed tongue, and recurrent oral herpes labialis. The aim of this study was to examine the properties of fucoidans for use in oral healthcare. The antimicrobial, anti-adhesion, endotoxin-neutralizing, and cyclooxygenase (COX)-1 and ...
Source: Odontology - June 18, 2019 Category: Dentistry Source Type: research

Risk stratification against inferior alveolar nerve injury after lower third molar extraction by scoring on cone-beam computed tomography image
In conclusion, the high-risk g roup of IANI after LM3 surgery corresponded to individuals with multiple factors: lingual/inter-radicular IAC position to LM3, multiple roots with perforated IAC, and increased age (>  30 years). Raising awareness of the higher probability for IANI is needed for patients with multiple aforementioned factors. (Source: Odontology)
Source: Odontology - June 17, 2019 Category: Dentistry Source Type: research

Dual Rinse ® HEDP increases the surface tension of NaOCl but may increase its dentin disinfection efficacy
AbstractThe aim of this study was to evaluate the surface tension and the antimicrobial activity in infected dentin of a NaOCl solution combined with an etidronate powder (Dual Rinse® HEDP), compared to pure NaOCl and the classic NaOCl  + EDTA irrigating sequence, respectively. The surface tension of three irrigants was measured by Wilhelmy technique. To evaluate the antimicrobial activity of the solutions, 26 human teeth were contaminated for 5 days withE.faecalis. After bacterial contamination, ten samples were irrigated with NaOCl followed by EDTA, another ten with NaOCl/Dual Rinse® HEDP, and ...
Source: Odontology - June 13, 2019 Category: Dentistry Source Type: research

Craniofacial malformations and their association with brain development: the importance of a multidisciplinary approach for treatment
AbstractThe craniofacial complex develops mainly in the first trimester of pregnancy, but its final shaping and the development of the teeth extend into the second and third trimesters. It is intimately connected with the development of the brain because of the crucial role the cranial neural crest cells play and the fact that many signals which control craniofacial development originate in the brain and vice versa. As a result, malformations of one organ may affect the development of the other. Similarly, there are developmental connections between the craniofacial complex and the teeth. Craniofacial anomalies are either ...
Source: Odontology - June 6, 2019 Category: Dentistry Source Type: research

Correction To: Evaluation of mechanical and adhesion properties of glass ionomer cement incorporating nano-sized hydroxyapatite particles
In the original publication of the article, the family name of the author. (Source: Odontology)
Source: Odontology - June 4, 2019 Category: Dentistry Source Type: research

Curcumin inhibits the expression of proinflammatory mediators and MMP-9 in gingival epithelial cells stimulated for a prolonged period with lipopolysaccharides derived from Porphyromonas gingivalis
In conclusion, these findings indicate that curcumin inhibits the expression of inflammatory cytokines and MMP-9 in primary gingival epithelial cells stimulated wit hP. gingivalis-derived LPS via NF- κB activation. (Source: Odontology)
Source: Odontology - May 13, 2019 Category: Dentistry Source Type: research

The influence of thickeners of food on the particle size of boluses: a consideration for swallowing
AbstractThe purpose of this study was to examine the influence of thickeners with different levels of thickness on the sizes of particles in food boluses. In medical and nursing care, thickeners are used to make food safe for patients with dysphagia. However, the effect of thickeners on the foods they are added to, especially during swallowing, is still unclear. The bolus particles of 20 healthy volunteers were photographed, and the digital images were used to estimate the sizes of particles in them. Eight test samples with thickeners with different levels of thickness were tested: six grades of thickened carrot juice with...
Source: Odontology - May 10, 2019 Category: Dentistry Source Type: research

Immunohistochemical assessment of growth factor signaling molecules: MAPK, Akt, and STAT3 pathways in oral epithelial precursor lesions and squamous cell carcinoma
AbstractSeveral growth factors and their receptors, such as epidermal growth factor receptor, have been studied as prognostic biomarkers for many epithelial malignancies. The signal transduction cascade of those receptors includes RAS/RAF/ERK, PI3K/Akt/mTOR, and STAT3 pathways. The aim of this study was to investigate the expression levels of several key proteins of those pathways in patients with oral squamous cell carcinoma (OSCC) and oral epithelial precursor lesions (OEPLs), and to correlate the expressions of these proteins with clinicopathologic features and prognosis. Fifteen leukoplakia (LP), 15 low-grade epithelia...
Source: Odontology - May 6, 2019 Category: Dentistry Source Type: research