205,098 results match your criteria tooth site


Dental microstructure records life history events: A histological study of mandrills (Mandrillus sphinx) from Gabon.

J Hum Evol 2021 Jul 27;158:103046. Epub 2021 Jul 27.

Department of Anthropology, Durham University, South Road, Durham, DH1 3LE, UK. Electronic address:

Accentuated lines in dental microstructure are hypothesized to correlate with potentially stressful life history events, but our understanding of when, how and why such accentuated lines form in relation to stressful events is limited. We examined accentuated line formation and life history events in the teeth of three naturally deceased mandrills (Mandrillus sphinx, Cercopithecidae), for whom we had detailed life history information. We determined the ages at formation of accentuated lines in histological tooth sections and used dates of birth and death to calibrate dental histology to calendar time and individual age. Read More

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Characterization of a Portuguese family with Charcot-Marie-Tooth disease type 1E due to a novel point mutation in the PMP22 gene.

Clin Neurol Neurosurg 2021 Jul 21;208:106829. Epub 2021 Jul 21.

Department of Neurology, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Rua da Junqueira 126, 1349-019 Lisbon, Portugal; CEDOC Chronic Diseases Research Centre, Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal.

Introduction: Point mutations in the Peripheral Myelin Protein 22 (PMP22) gene comprise less than 5% of the Charcot-Marie-Tooth (CMT) type 1 cases, and individualize either the CMT 1E subtype, or Hereditary Neuropathy with Liability to Pressure Palsy. The phenotype of CMT 1E presents with a severe early-onset polyneuropathy associated with deafness, although the clinical spectrum is broad.

Case Report: We describe a novel PMP22 gene point mutation (c. Read More

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Iatrogenic Fracture of the Lower Jaw: A Rare Complication of Lower Molar Extraction.

Acta Medica (Hradec Kralove) 2021 ;64(2):101-107

Department of Dentistry, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic.

Iatrogenic mandible fracture is a rare complication of a tooth extraction with an incidence between 0.0033-0.0034%. Read More

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January 2021

Use of bioluminescence measurements for detection of artificial demineralization adjacent to orthodontic brackets.

J Orofac Orthop 2021 Jul 30. Epub 2021 Jul 30.

Dental School, Department of Orthodontics, Philipps University of Marburg, Georg-Voigt-Str. 3, 35039, Marburg, Germany.

Purpose: Enamel demineralization can occur as a side effect during orthodontic treatment with fixed appliances and should be detected as early as possible. A new approach to assess demineralization is a system consisting of a photosensitive protein that binds to free calcium ions at the enamel surface. A camera is then used to visualize the bioluminescence spots. Read More

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Evaluation of external apical root resorption caused by fixed functional treatment of class II malocclusion : Cast splint Herbst appliance vs. Forsus fatigue resistant device.

J Orofac Orthop 2021 Jul 30. Epub 2021 Jul 30.

Faculty of Dentistry, Department of Orthodontics, Erciyes University, 38039, Melikgazi Kayseri, Turkey.

Introduction: The aim of this study was to evaluate and compare the effects of class II fixed functional treatment with a cast splint Herbst appliance (HA; Herbst Set I, Dentaurum, Ispringen, Germany) and Forsus fatigue resistant device (FRD; 3M Unitek Corp., Monrovia, CA, USA) on external apical root resorption (EARR) in posterior teeth.

Methods: In all, 40 patients (15 male and 25 female) with class II division 1 malocclusion were treated with two fixed functional appliances: HA (20 patients, mean age 14. Read More

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Volumetric and dimensional accuracy assessment of CAD-CAM-manufactured dental prostheses from different materials.

J Prosthet Dent 2021 Jul 27. Epub 2021 Jul 27.

Senior Lecturer, Oral rehabilitation Department, Faculty of Dentistry, University Lille Nord de France, Paris, France.

Statement Of Problem: In computer-aided design and computer-aided manufacturing (CAD-CAM) dentistry, the CAD of the prosthesis represents the clinical prerequisite design to restore the treated tooth. However, how closely the CAM prosthesis shape matches the CAD, particularly in relation to different materials, is unclear.

Purpose: The purpose of this in vitro study was to evaluate onlays designed and manufactured with the same CAD-CAM system but manufactured with different materials. Read More

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Accuracy of anterior denture tooth arrangements of CAD-CAM complete removable dental prostheses made with a tooth mold template.

J Prosthet Dent 2021 Jul 27. Epub 2021 Jul 27.

Private practice, Athens, Greece.

Statement Of Problem: Research evaluating the accuracy of anterior tooth mold templates to computer-aided design and computer-aided manufacture (CAD-CAM) fabricated complete removable dental prostheses (CRDPs) is limited.

Purpose: The purpose of this in vitro study was to investigate the accuracy of the anterior denture tooth arrangement on CAD-CAM complete removable dental prostheses made with the anterior tooth mold template.

Material And Methods: A maxillary and mandibular edentulous model was mounted on a semiadjustable articulator to simulate a patient's maxillary arch. Read More

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Hierarchical CNN-based occlusal surface morphology analysis for classifying posterior tooth type using augmented images from 3D dental surface models.

Comput Methods Programs Biomed 2021 Jul 21;208:106295. Epub 2021 Jul 21.

School of Automation, Hangzhou Dianzi University, 310018, Hangzhou, China.

Objective: 3D Digitization of dental model is growing in popularity for dental application. Classification of tooth type from single 3D point cloud model without assist of relative position among teeth is still a challenging task.

Methods: In this paper, 8-class posterior tooth type classification (first premolar, second premolar, first molar, second molar in maxilla and mandible respectively) was investigated by convolutional neural network (CNN)-based occlusal surface morphology analysis. Read More

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Mechanical property gradients of taenioglossan radular teeth are associated with specific function and ecological niche in Paludomidae (Gastropoda: Mollusca).

Acta Biomater 2021 Jul 27. Epub 2021 Jul 27.

Functional Morphology and Biomechanics, Zoological Institute, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 9, 24118 Kiel, Germany; Department of Mammalogy and Palaeoanthropology, Center of Natural History (CeNak), Universität Hamburg, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany. Electronic address:

Biological tissues may exhibit graded heterogeneities in structure and mechanical properties that are crucial to their function. One biological structure that shows variation in both structure and function is the molluscan radula: the organ comprises a chitinous membrane with embedded teeth and serves to process and gather food. The tooth morphologies had been well studied in the last decades, but the mechanical properties of the teeth are not known for the vast majority of molluscs. Read More

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A comparative study between the effect of reverse curve of Spee archwires and anterior bite turbos in the treatment of deep overbite cases: A randomized clinical trial.

Angle Orthod 2021 Jul 30. Epub 2021 Jul 30.

Objectives: To compare deep overbite treatment using 0.016 × 0.022 nickel-titanium lower reverse curve of Spee archwire (LRCA) or metal anterior bite turbos (ABTs). Read More

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What is the survival rate of deciduous molars in cases with agenesis of premolar successors? A systematic review.

Angle Orthod 2021 Jul 30. Epub 2021 Jul 30.

Objectives: To systematically review the literature on the survival rate of deciduous molars in cases of agenesis of premolar successors.

Materials And Methods: Four electronic databases and partial grey literature were searched up to November 2020. The PECOS eligibility criteria included (P) second deciduous molar (E) exposed to agenesis of a premolar successor (O) evaluated by the survival rate in the oral cavity, infraocclusion, and root resorption through (S) observational studies. Read More

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Effects of Photobiomodulation on the Upper First Molar Intrusion Movement Using Mini-Screws Anchorage: A Randomized Controlled Trial.

Photobiomodul Photomed Laser Surg 2021 Jul 29. Epub 2021 Jul 29.

Section of Orthodontics, School of Dentistry, Complutense University of Madrid, Madrid, Spain.

The aim of this study was to quantify the changes obtained when the molar intrusion movement is complemented by photobiomodulation (PBM). A common problem in adult patients is the super-eruption of maxillary molars caused by the loss of the antagonist tooth. Super-erupted molars impair oral rehabilitation and can cause both occlusal and functional problems. Read More

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Outcomes of a 1-Year Prospective Single-Arm Cohort Study Using a Novel Macro-Hybrid Implant Design in Extraction Sockets: Part 1.

Int J Periodontics Restorative Dent 2021 Jul-Aug;41(4):499-508

A novel macro-hybrid implant design was introduced to afford high apical primary stability and more coronal space to preserve the circumferential extraction socket architecture. This study presents 1-year data from a prospective single-arm cohort study. The data was distilled based on the following criteria: (1) single-tooth immediate tooth replacement therapy (ITRT) in the maxillary anterior and premolar regions in intact (Type 1) extraction sockets that were (2) treated with the dual-zone grafting technique. Read More

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Assessment of Maxillary Expansion by Piezocision-Assisted Orthodontics: A Pilot Study.

Int J Periodontics Restorative Dent 2021 Jul-Aug;41(4):e129-e138

The correction of transverse malocclusions due to maxillary width deficiency in adults is challenging. Multiple surgical and nonsurgical procedures have been used in conjunction with orthodontics to address this situation, and most common is the surgically assisted rapid maxillary expansion (SA-RME). Although successful, it is quite aggressive. Read More

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Unraveling the etiology of myelin disorders: the P2 case in Charcot-Marie-Tooth disease.

FEBS J 2021 Jul 29. Epub 2021 Jul 29.

Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina.

There are several examples of single mutations that lead to a well-defined disease through a well-known mechanism. In other cases, a collection of mutations of the same protein produces a pathology with different degrees of severity. The accompanying work by Uusitalo et al. Read More

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Effect of periodontal-orthodontic treatment of teeth with pathological tooth flaring, drifting and elongation in patients with severe periodontitis: a systematic review with meta-analysis.

J Clin Periodontol 2021 Jul 29. Epub 2021 Jul 29.

Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.

Aim: To assess the beneficial and adverse effects of periodontal-orthodontic treatment of teeth with pathological tooth flaring, drifting and elongation in patients with severe periodontitis on the dental and periodontal tissues.

Materials And Methods: Nine databases were searched in April 2020 for randomized/non-randomized clinical studies. After duplicate study selection, data extraction, and risk-of-bias assessment, random effects meta-analyses of mean differences (MDs) and their 95% confidence intervals (CIs) were performed, followed by subgroup/meta-regression analyses. Read More

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Gene Analysis in Two Extended Families with X-Linked Charcot-Marie-Tooth Disease.

Case Rep Neurol 2021 May-Aug;13(2):422-428. Epub 2021 Jun 23.

Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia.

X-linked Charcot-Marie-Tooth (CMT) disease type I (CMTX1) is the second most frequent type of CMT disease caused by pathogenic variants in the gene. We described 2 extended cases (families) with CMTX1 with identified pathogenic variants - p.Val139Met and p. Read More

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Incidental Finding of an Odontome Attached with Primary Teeth: A Rare Case Report.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):167-169

Vinu Dental Clinic, Gobichettipalayam, Erode, Tamil Nadu, India.

Odontomes are hamartomatous developmental malformation of dental tissues which causes disturbances in the eruption of teeth. In general, odontomes occur frequently in permanent dentition and are seldom associated with primary dentition. This case report presents an odontome attached with primary tooth which was incidentally found during routine radiographic diagnosis and it spotlights the significance of early diagnosis and management of odontome to prevent future complications such as retained deciduous teeth and impaction of permanent teeth, malocclusion, etc. Read More

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Management of Maxillary Premolar with Pre-eruptive Intracoronal Resorption: A 5-year Follow-up Case.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):161-166

Department of Pediatric Dentistry and Dental Public Health, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.

Aim And Objective: The present article aims to describe and discuss the preventive clinical management of a pre-eruptive intracoronal resorption (PEIR) defect on a maxillary right second premolar of an 11-year, 5-month-old girl.

Background: Pre-eruptive intracoronal resorption is described as an abnormal, well-circumscribed, radiolucent area, occurring within the coronal dentinal tissue close to the dentinoenamel junction of unerupted teeth and extending into various depths of the dentin. It is a rare anomaly occurring in primary and permanent dentitions. Read More

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Nonsyndromic with Recurrent Idiopathic Gingival Fibromatosis: A Rare Case Report.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):158-160

Department of Periodontology, Mahatma Gandhi Dental College and Hospital, Jaipur, Rajasthan, India.

Idiopathic gingival fibromatosis is a genetic rare disorder, which is characterized by a progressive enlargement of the gingiva. Gingival enlargement is an overgrowth of the gingiva, which can be caused by various etiological factors such as poor oral hygiene, plaque accumulation, inadequate nutrition, hormonal stimulation, several blood dyscrasias, or long-term intake of certain drugs like phenytoin, nifedipine, or cyclosporine. A 14-year-old female patient reported to the Department of Periodontology, Mahatma Gandhi Dental College and Hospital, Jaipur, Rajasthan with her chief complaint of swollen gums in both upper and lower arches since 3 years, which was gradual in onset and increased in size since 4 months which covered almost half of the surface of each tooth. Read More

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Unraveling Impacted Maxillary Incisors: The Why, When, and How.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):149-157

Department of Orthodontics and Dentofacial Orthopaedics, ITS Center for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India.

Failure of eruption of maxillary incisors requires careful diagnosis and treatment planning. The cause of impaction may vary from physical obstruction in the path of eruption, tooth material arch length discrepancy to malformation of the tooth. General principles of management of the condition include removal of physical obstruction, creation of space, and surgical exposure with or without traction. Read More

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Comparative Evaluation of Efficacy of Kefir Milk Probiotic Curd and Probiotic Drink on in 8-12-year-old Children: An Study.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):120-127

Department of Pedodontics and Preventive Dentistry, KLR's Lenora Institute of Dental Sciences, Rajahmundry, Andhra Pradesh, India.

Aim And Objective: To compare the effect of probiotic products in reducing the levels of salivary before and after their consumption.

Materials And Methods: Eighty school children with initial carious lesions in the age group of 8-12 years were selected and divided into four groups. Children in group I (control) were undergone with restorations without supplementation of probiotics. Read More

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Impact of Pediatric Dentistry Residents Posted in Pediatrics Department: A Retrospective Assessment of 6 Years.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):84-87

Department of Pedodontics and Preventive Dentistry, Pushpagiri College of Dental Sciences, Thiruvalla, Kerala, India.

Aim: To measure the influence of rotatory pediatrics postings for dental residents on the outpatient census of the pediatric dentistry department. The secondary aims were to assess the change in trend toward the number of preschool children visiting the department before and after the initiation of pediatrics posting and also to find the percentage of children affected with caries among children visiting the pediatricians.

Materials And Methods: Retrospectively, the census of the pediatric dentistry department was calculated from 2010 to 2016. Read More

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Comparative Evaluation of Fracture Resistance of Endodontically Treated Teeth Restored with Different Core Build-up Materials: An Study.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):51-58

Department of Pedodontics and Preventive Dentistry, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India.

The aim is to evaluate the fracture resistance of endodontically treated teeth restored with posterior direct composite (PRC) resin, bulk-fill composite resin, dual-cure composite (DCC) resin, and short fiber-reinforced composite (SFC) resin material.

Materials And Methods: Ninety sound maxillary premolar teeth were divided into 6 groups which comprised 15 teeth each. Group I was a negative control group where neither cavity preparation nor root canal treatment was done on the specimen. Read More

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Comparison of Bite Force and the Influencing Factors Pre- and Post-cementation of Stainless Steel Crown in Children Using T-Scan.

Int J Clin Pediatr Dent 2021 Jan-Feb;14(1):46-50

Department of Orofacial Pain Clinic, RajaRajeswari Dental College and Hospital, Kumbalgudu, Bengaluru, Karnataka, India.

Background: In children, stainless steel crowns (SSCs) have become an invaluable restorative option for grossly decayed primary teeth. The crowns are manufactured in different sizes with preformed anatomy which requires trimming or contouring as a necessary step to fit an individual tooth. Initially, this may produce variation in the occlusal contact points yet may not result in pain or discomfort. Read More

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Intraoral scanners for capturing the palate and its relation to the dentition.

Sci Rep 2021 Jul 29;11(1):15489. Epub 2021 Jul 29.

Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.

Proper superimposition of intraoral scan generated 3D models enables detailed assessment of soft and hard tissue surface changes. This requires accurate 3D models and stable structures as superimposition references. In the maxilla, different reference areas have been proposed, mostly located at the palatal region. Read More

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Equatorial pliosaurid from Venezuela marks the youngest South American occurrence of the clade.

Sci Rep 2021 Jul 29;11(1):15501. Epub 2021 Jul 29.

Abteilung Geowissenschaften, Naturkunde-Museum Bielefeld, Adenauerplatz 2, 33602, Bielefeld, Germany.

Pliosaurids were the dominant macropredators in aquatic environments at least since the Middle Jurassic until their extinction in the early Late Cretaceous. Until very recently, the Cretaceous record of Pliosauridae has been poor and difficult to interpret from the taxonomic and phylogenetic perspective. Despite that the knowledge of Cretaceous pliosaurids improved in recent years, numerous aspects of their evolutionary history still remain only poorly known. Read More

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Intraoral scanners: An American Dental Association Clinical Evaluators Panel survey.

J Am Dent Assoc 2021 Aug;152(8):669-670.e2

Background: Dentists may choose to integrate intraoral scanners (IOSs) into their practices, but there are many different IOS technologies and system generations to choose from, posing a challenge for dentists who want to invest in them.

Methods: A survey of IOS use rates, advantages, satisfaction, and training was developed and deployed through Qualtrics to the 968 members of the American Dental Association Clinical Evaluators (ACE) Panel on February 19, 2021. Nonrespondents were sent reminders, and data were analyzed in SAS Version 9. Read More

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Revisiting the human dental follicle: from tooth development to its association with unerupted or impacted teeth and pathological changes.

Dev Dyn 2021 Jul 29. Epub 2021 Jul 29.

Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais (UFMG),, Belo Horizonte, Minas Gerais, Brazil.

Dental follicles are involved in odontogenesis, periodontogenesis, and tooth eruption. Dental follicles are unique structures, considering that their remnants can persist within the jawbones after odontogenesis throughout life if the tooth does not erupt. Pathological changes may occur in these tissues as individuals age. Read More

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