609,384 results match your criteria Dental Avulsed Tooth

Professional legislation knowledge of dentists and psychological effects of negligence.

J Forensic Leg Med 2021 Jun 8;81:102199. Epub 2021 Jun 8.

Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.

Introduction: The aim of the present study was to evaluate the extent to which a group of general dentists and specialists had knowledge of the professional laws and psychological effects of negligence on them.

Materials And Methods: The sample in this cross-sectional study consisted of 400 dentists (General dentists and specialists) in Isfahan city, Iran. Having designed the questionnaire and confirmed its validity and reliability, we published online to be completed by the dentists. Read More

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Severe steatosis and mild colitis are important for the early occurrence of hepatocellular carcinoma.

Biochem Biophys Res Commun 2021 Jun 8;566:36-44. Epub 2021 Jun 8.

Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan. Electronic address:

The number of patients with non-alcoholic steatohepatitis (NASH) and inflammatory bowel disease (IBD) is increasing. This study elucidates the effect of both NASH and IBD on hepatocellular carcinoma (HCC) using a mouse model combining NASH and IBD. The melanocortin 4 receptor-deficient (Mc4r-KO) mice were divided into four groups with or without a high-fat diet (HFD) and with or without dextran sulfate sodium (DSS) to induce colitis, and the differences in liver damage and occurrence of HCC were analyzed. Read More

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Clinical evaluation of in-office tooth whitening with violet LED (405 nm): A double-blind randomized controlled clinical trial.

Photodiagnosis Photodyn Ther 2021 Jun 8:102385. Epub 2021 Jun 8.

Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, Brazil. Electronic address:

Background: Although there is little evidence showing the effectiveness of violet LED on in-office tooth whitening, there are some studies which have reported satisfactory results. This double-blind randomized controlled clinical trial aimed to evaluate the effect of a violet light emission diode (LED) (405nm) system, used in-office, on tooth whitening, sensitivity, use of medication after whitening and quality of life.

Methods: Eight patients were randomized into 4 groups (n = 20): G1 - violet LED, G2 - 35% carbamide peroxide (CP) and violet LED, G3 only CP 35% and G4 35% hydrogen peroxide (HP). Read More

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Treatments and outcomes of generalized pustular psoriasis: a cohort of 1516 patients in a nationwide inpatient database in Japan.

J Am Acad Dermatol 2021 Jun 8. Epub 2021 Jun 8.

Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan.

Background: Because generalized pustular psoriasis (GPP) is uncommon, there are few studies reporting treatments and outcomes for large numbers of patients.

Objective: To report treatments and outcomes in a large cohort of hospitalized patients with GPP.

Methods: Using a Japanese national inpatient database, we identified 1516 patients with GPP who required hospitalization from July 2010 to March 2019. Read More

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Hydrogeochemistry and health hazards of fluoride-enriched groundwater in the Tarim Basin, China.

Environ Res 2021 Jun 8:111476. Epub 2021 Jun 8.

College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China. Electronic address:

Fluoride (F) enrichment reduces the availability of groundwater resources in the arid region, and it is thus important to investigate the hydrogeochemistry and health hazards of fluoride-enriched groundwater. Seventy-two groundwater samples (20 unconfined samples from the piedmont plain, 22 unconfined samples and 30 shallow confined samples from the alluvial plain) were collected in the Tarim Basin of China to illustrate the geochemical processes driving the F enrichment and the incidence of dental fluorosis. The patterns of average ions contents in groundwater are Na > Ca > Mg > K and SO > Cl > HCO > NO > F. Read More

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Erbium, Chromium:Yttrium-Scandium-Gallium-Garnet Laser for Root Conditioning and Reduction of Postoperative Morbidity in the Treatment of Gingival Recession Defects: A Randomized Controlled Clinical Trial.

Photobiomodul Photomed Laser Surg 2021 Jun 11. Epub 2021 Jun 11.

Department of Periodontology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA.

This clinical trial evaluates the effect of erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) root surface biomodification and laser harvesting of de-epithelialized gingival graft (DGG) on root coverage clinical outcomes and postoperative morbidity, and compares this to the conventional blade-harvested DGG method without Er,Cr:YSGG root surface biomodification in treatment of Miller's class I, II gingival recessions (GR). The application of laser technology to enhance tooth root coverage clinical outcomes as well as the impact of laser on postoperative morbidity after harvesting autogenous soft tissue grafts requires further research. This study is a randomized, single-blinded controlled trial, including 24 volunteers with isolated GR defects. Read More

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Comparing prognostic utility between the 8th edition of TNM staging system and the lymph node ratio for oral squamous cell carcinoma.

Head Neck 2021 Jun 11. Epub 2021 Jun 11.

Maxillofacial Surgery and Odontostomatology Unit, IRCCS Fondazione Ca' Granda, Ospedale Maggiore Policlinico di Milano, Milan, Italy.

Background: Lymph node metastasis in oral squamous cell carcinoma (OSCC) is associated with poor prognosis. The 8th edition of TNM has implemented new nodal staging criteria. We assess the prognostic utility of the lymph node ratio (LNR) and compare it to that of pN in the TNM 8th edition. Read More

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Clinical and radiographic performance of self-locking conical connection implants in the posterior mandible: five-year results of a two-centre prospective study.

Clin Oral Implants Res 2021 Jun 11. Epub 2021 Jun 11.

Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University, Medical Centre, Augustusplatz 2, D-55131, Mainz, Germany.

Objective: This prospective study aims to assess the 5-year clinical performance of implants with internal conical connection and platform-switched abutments in the posterior mandible.

Material And Methods: Healthy adults missing at least two teeth in the posterior mandible and with a natural tooth mesial to the implant site received two or three adjacent implants. After a transmucosal healing period single crown restorations were cemented on platform-switched abutments. Read More

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Chiral deaza-coelenterazine analogs for probing a substrate-binding site in the Ca2+-binding photoprotein aequorin.

PLoS One 2021 11;16(6):e0251743. Epub 2021 Jun 11.

Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan.

The Ca2+-binding photoprotein aequorin is a complex of apoAequorin (apoprotein) and (S)-2-peroxycoelenterazine. Aequorin can be regenerated by the incubation of apoAequorin with coelenterazine and molecular oxygen (O2). In this study, to investigate the molecular recognition of apoAequorin for coelenterazine using chemical probes, the chiral deaza-analogs of (S)- and (R)-deaza-CTZ (daCTZ) for coelenterazine and of (S)-2- and (R)-2-hydroxymethyl-deaza-CTZ (HM-daCTZ) for 2-peroxycoelenterazine were efficiently prepared by the improvement method. Read More

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The effect of the combined use of silver diamine fluoride and potassium iodide in disrupting the plaque biofilm microbiome and alleviating tooth discoloration: A systematic review.

PLoS One 2021 11;16(6):e0252734. Epub 2021 Jun 11.

Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates.

Silver diamine fluoride (SDF) is used in minimally invasive dentistry for arresting dental caries. However, discoloration of teeth is a significant side effect that has limited the use of SDF. Hence, the application of potassium iodide (KI) following SDF has been proposed to ameliorate the staining. Read More

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Patterns of Usage of Complementary and Alternative Medicine Among Adults Visiting Health Care Centers in Mysuru, India: A Questionnaire-Based Survey.

Holist Nurs Pract 2021 Jul-Aug 01;35(4):199-205

Department of Public Health Dentistry, JSS Dental College & Hospital (Constituent College), JSS Academy of Higher Education & Research, Mysuru, Karnataka, India.

The study intended to assess extent of complementary and alternative medicine use among patients visiting health care facilities in Mysuru, India, and factors influencing its choice. Prevalence of complementary and alternative medicine use was 33% and was not influenced by sociodemographic factors and individual health perceptions and habits. Read More

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Predictable 3D guided adhesive bonding of porcelain veneers using 3D printed trays.

J Esthet Restor Dent 2021 Jun 11. Epub 2021 Jun 11.

Director of Esthetic Digital Dentistry Specialty Program, Universidad de los Andes, Santiago, Chile.

Objective: This clinical report describes a novel digital technique to facilitate and improve the porcelain laminate veneers adhesive bonding procedure using a customized 3D printed guide.

Clinical Considerations: Porcelain veneers can be stabilized in their fully seated position with a digitally design 3D printed guide before the resin cement is polymerized. The excess cement can be carefully and predictably removed without the risk of dislodgement, rotation or misfit, allowing the clinician to light cure them under controlled pressure in the correct seating position without the risk of fracturing the ceramic material. Read More

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Survival of stainless steel crowns and composite resin restorations in molars affected by Molar-Incisor Hypomineralization (MIH).

Int J Paediatr Dent 2021 Jun 11. Epub 2021 Jun 11.

Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, São Paulo State University (Unesp), Araraquara School of Dentistry, Araraquara, São Paulo, Brazil.

Background: Currently, there is no consensus on the superiority of any material for the restorative treatment of molars affected by Molar-Incisor Hypomineralization (MIH).

Aim: To evaluate the survival of restorations with stainless steel crown (SSC) or composite resin (CR) in first permanent molars affected by MIH for 24 months.

Design: In this retrospective cohort study, 61 CR and 54 SSC restorations performed on molars affected by MIH of patients, aged between 7 and 10, that were treated and overseen at a university dental clinic in the period of 2017-2020 were evaluated. Read More

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Oral mucositis in pediatric cancer patients undergoing allogenic hematopoietic stem cell transplantation preventively treated with professional dental care and photobiomodulation: Incidence and risk factors.

Int J Paediatr Dent 2021 Jun 11. Epub 2021 Jun 11.

Instituto de Ensino e Pesquisa, Hospital Sírio-Libanês, São Paulo, Brazil.

Background: Oral mucositis (OM) is an important side effect related to allogeneic hematopoietic stem cell transplantation (allo-HSCT) and it has been associated with a significative reduction of quality of life. A negative impact of this toxicity in pediatric patients could result in an increased use of parenteral feeding and opioids, longer periods of hospitalization and higher risk of systemic infection.

Aim: To investigate the clinical features, and clinical outcomes associated with OM development and severity in hematologic cancer pediatric patients undergoing allo-HSCT who underwent professional dental care (PDC) and photobiomodulation (PBM) as prophylactic treatment. Read More

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Effect of a sonic toothbrush on the abrasive dentine wear using toothpastes with different abrasivity values.

Int J Dent Hyg 2021 Jun 11. Epub 2021 Jun 11.

Department of Preventive Dentistry and Oral Epidemiology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.

Objective: This in-vitro study aimed to investigate the effect of a sonic toothbrush on the resulting abrasive dentine wear using toothpastes with different abrasivities compared to the use of a manual toothbrush.

Methods: Ninety-six bovine dentine samples were divided into six groups and subjected to brushing sequence (sonic: 20 min, 0.9 N, 10 strokes/min, manual: 20 min, 1. Read More

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Population history of Brazilian south and southeast shellmound builders inferred through dental morphology.

Am J Phys Anthropol 2021 Jun 11. Epub 2021 Jun 11.

Museu de Arqueologia e Etnologia, Universidade de São Paulo, São Paulo, Brazil.

Objective: The Southeast and South Coast of Brazil was inhabited during most of the Holocene by shellmound builders. Although there are cultural differences in the archaeological record between regions, it is still debatable how these differences may relate to different population histories. Here, we contribute to this discussion by exploring dental morphological affinities between several regional series. Read More

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The interaction and interference of preformed metal crowns on magnetic resonance imaging: a scoping review with a systematic methodology.

Eur Arch Paediatr Dent 2021 Jun 11. Epub 2021 Jun 11.

School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.

Purpose: Preformed metal crowns are widely used to restore primary and permanent teeth. Children may require magnetic resonance imaging (MRI) for diagnosis and monitoring of diseases in the head and neck region. Metallic objects, in the field of view, may compromise the diagnostic value of an MRI. Read More

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Acid base disorders in patients with COVID-19.

Int Urol Nephrol 2021 Jun 11. Epub 2021 Jun 11.

Clinic of Infectious Diseases, University Hospital of Modena, Modena, Italy.

Purpose: Acid-base derangement has been poorly described in patients with coronavirus disease 2019 (COVID-19). Considering the high prevalence of pneumonia and kidneys injury in COVID-19, frequent acid-base alterations are expected in patients admitted with SARS-Cov-2 infection. The study aimed to assess the prevalence of acid-base disorders in symptomatic patients with a diagnosis of COVID-19. Read More

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Prognostic impact of surgery after chemotherapy for type 4 gastric cancer.

Surg Today 2021 Jun 11. Epub 2021 Jun 11.

Department of Onco-Biological Surgery, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan.

Purpose: To assess the clinical indications for, and prognostic impact of surgery after, chemotherapy for type 4 gastric cancer.

Methods: The subjects of this retrospective study were 67 patients who received chemotherapy for type 4 gastric cancer. The patients were grouped into those with progressive disease (PD group) and those without PD (non-PD group), according to the tumor response to chemotherapy. Read More

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Effect of tooth bleaching and application of different dentifrices on enamel properties under normal and hyposalivation conditions: an in situ study.

Clin Oral Investig 2021 Jun 11. Epub 2021 Jun 11.

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, Piracicaba, SP, 13.414-903, Brazil.

Objective: The purpose of this in situ study was to evaluate different dentifrices on enamel after bleaching under normal and hyposalivatory conditions.

Materials And Methods: Twenty-four participants were assigned of which 12 had normal and 12 had low salivary flow. The study was conducted in 6 in situ experimental phases of 24 h duration: placebo, NaF, SnF, F/Sn/Chitosan, F/Arginine, and F/Bioactive Glass. Read More

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Caldesmon ablation in mice causes umbilical herniation and alters contractility of fetal urinary bladder smooth muscle.

J Gen Physiol 2021 Jul 11;153(7). Epub 2021 Jun 11.

Institute of Vegetative Physiology, Center of Physiology, Faculty of Medicine, University of Cologne, Cologne, Germany.

The actin-, myosin-, and calmodulin-binding protein caldesmon (CaD) is expressed in two splice isoforms: h-CaD, which is an integral part of the actomyosin domain of smooth muscle cells, and l-CaD, which is widely expressed and is involved in many cellular functions. Despite extensive research for many years, CaD's in vivo function has remained elusive. To explore the role of CaD in smooth muscle contraction in vivo, we generated a mutant allele that ablates both isoforms. Read More

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Combination of a Hydraulic Device and Nanohydroxylapatite Paste for Minimally Invasive Transcrestal Sinus Floor Elevation: Procedure and 4-Year Results.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):587-597

Purpose: The objectives of this retrospective study were to describe a transcrestal sinus floor elevation technique combining the use of a hydraulic device and a nanohydroxylapatite paste and to report on 4-year clinical and radiographic outcomes.

Materials And Methods: The sinus floor elevation procedure used a specially designed drill (SinusJet) to start sinus membrane unsticking and a nanohydroxylapatite paste (Ostim) for further sinus membrane elevation and bone augmentation. It was performed as a one-step procedure with immediate implant placement or a two-step procedure with delayed implant placement 9 months later. Read More

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Clinical Application of PEEK as a Provisional Fixed Dental Prosthesis Retained by Reciprocated Guide Surfaces of Healing Abutments During Dental Implant Treatment.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):581-586

Purpose: The aim of this study was to evaluate the clinical use of a high-performance polymer, polyether ether ketone (PEEK), as a material for use in provisional fixed dental prostheses (FDPs) that can be retained by reciprocated guide surfaces of hexagonal-shaped healing abutments during dental implant treatment.

Materials And Methods: Patients requiring teeth replacement with dental implants for partially and fully edentulous cases in the maxilla and mandible were included. The provisional FDP was fabricated with hex castable copings and PEEK granules using the lost wax technique. Read More

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Survey of Dental Clinicians for Attitude and Use of Torque-Limiting Devices.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):538-545

Purpose: The purpose of this study was to survey practicing clinicians and determine if differences existed concerning their use of torque-limiting devices (TLDs) and screw-tightening protocols, comparing this with existing universal industry standards.

Materials And Methods: A nine-question survey was administered with 428 dentists providing data for three specific areas: (1) demographic information-TLD ownership, device age, frequency of use, and observations of screw loosening; (2) recognition information-calibration, reading measurements of the TLD, and the meaning of preload; (3) usage information-screw-tightening protocols and effect of speed during actioning of the TLD. Data collection was compared with industry standards for use of hand torque tools including ISO-6789 1,2:2017 and related texts pertaining to screw fastener protocols. Read More

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Rehabilitation of Atrophic Posterior Maxilla with Pterygoid Implants: A 3D Finite Element Analysis.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):e51-e62

Purpose: Clinical cases have shown that pterygoid implants are a successful alternative solution for the rehabilitation of atrophic posterior maxillae; however, little research on the biomechanical behavior has been produced. This study created 3D models of pterygoid implant-supported prostheses and compared the stress and strain distributions in the pterygoid implants and surrounding bone using finite element analysis.

Materials And Methods: Three-dimensional models of a standardized human skull, pterygoid implants, and conventional dental implants were created using Simpleware, based on microcomputed tomography (micro-CT) and CBCT images. Read More

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Clinical Outcomes of Immediate Implant Loading with Fixed Prostheses in Edentulous Maxillae: A Systematic Review.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):503-519

Purpose: To review the evidence from the clinical outcomes of immediately loaded implants with fixed prostheses in edentulous maxillae.

Materials And Methods: An electronic search was performed in PubMed/MEDLINE, Embase, and Cochrane to identify studies investigating the outcome of implants subjected to immediate loading with fixed dental prostheses in edentulous maxillae. Only clinical studies with more than 10 patients and a mean follow-up time of more than 12 months were included. Read More

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Micro-CT Analysis of Microgap at a Novel Two-Piece Dental Implant Comprising a Replaceable Sleeve In Vitro.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):451-459

Purpose: Microcomputed tomography (micro-CT) is a relatively new modality to investigate mechanical deformations. The purpose of this study was to assess the microgap at the implant-sleeve connection of a new two-piece dental implant with a replaceable sleeve.

Materials And Methods: Implants were assembled with 25-degree angulated abutments. Read More

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Magnetic Resonance Imaging for the Planning, Execution, and Follow-up of Implant-Based Oral Rehabilitation: Systematic Review.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):432-441

Purpose: To undertake a systematic literature review of magnetic resonance imaging (MRI) employed in the three phases of implant-based oral rehabilitation: planning, execution, and follow-up.

Materials And Methods: MEDLINE (PubMed) and EMBASE bibliographic databases were searched up to January 2020 for studies assessing the use of MRI alone or in connection with CT and/or CBCT in the planning, execution, or follow-up of dental implant placement and/or bone grafting procedures in the maxilla or the mandible. Included studies were also assessed according to the diagnostic imaging efficacy scale presented by Fryback and Thornbury (F&T). Read More

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Synthesis and Characterization of Methacrylate-Functionalized Betulin Derivatives as Antibacterial Comonomer for Dental Restorative Resins.

ACS Biomater Sci Eng 2021 Jun 11. Epub 2021 Jun 11.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

Secondary caries is the primary cause of composite restoration failures, resulting from marginal leakage and bacterial accumulation in the oral environment. Antibacterial dental composites, especially antibacterial monomers, have emerged as a promising strategy to inhibit secondary caries, which is pivotal to prolonging the lifespan of dental restorations. In this work, monomethacrylate- and dimethacrylate-functionalized betulin derivatives (MBet and MBet) were synthesized via an esterification reaction and served as antibacterial comonomers to develop novel dental resin formulations, in which MBet and MBet were incorporated to partially or completely replace bisphenol A glycerolate dimethacrylate (Bis-GMA). Read More

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Appraisal of awareness on medical emergencies and its management among dentists in Bhubaneswar, India.

Rocz Panstw Zakl Hig 2021 ;72(2):193-201

Department of Public Health Dentistry, Institute of Dental Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India.

Background: Medical emergencies can be distressing for any dental professional, whether in a dental practice, hospital or other sites.

Objectives: To assess the knowledge and awareness of dental practitioners towards medical emergencies and its management in Bhubaneswar.

Material And Methods: In this cross-sectional investigation, a self-administered questionnaire which included demographic details and 19 questions regarding knowledge about medical emergencies, was disseminated to a random sample of 183 dentists working in their private dental clinic set up in Bhubaneswar. Read More

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January 2021