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https://www.readbyqxmd.com/read/28806687/mineralization-defects-are-comparable-in-fluorotic-impacted-human-teeth-and-fluorotic-mouse-incisors
#1
Rozita Jalali, Franck Guy, Samaneh Ghazanfari, Don Lyaruu, Leo van Ruijven, Pamela DenBesten, Stefania Martignon, Gina Castiblanco, Antonius L J J Bronckers
OBJECTIVE: Fluoride excess of 0.05-0.07mgF/kgbw/day in water or food additives like salt is the principal cause of endemic dental fluorosis. How fluoride causes these defects is not clear yet. Recent studies in rodents suggest that development of enamel fluorosis is associated with insufficient neutralization of protons released during the formation of hypermineralized lines. DESIGN: Here we examined whether hypermineralization could also be assessed by MicroCT in developing molar enamel of humans exposed to fluoride...
July 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28805103/dentoalveolar-oral-surgery-in-children-and-adolescents-organization-and-surgical-treatment-in-a-large-danish-municipal-dental-service
#2
Anni Birgitte Grønbæk, Flemming Petersen, Dorte Haubek, Sven Poulsen
OBJECTIVE: To describe a population-based organization of dentoalveolar surgical service for 0 to 18-year old subjects in a Danish municipal dental service, and analyze the type of dentoalveolar surgical interventions needed. MATERIAL AND METHODS: The study was conducted in the Municipality of Aarhus, Denmark during five consecutive school-years. An internal referral system was established within the municipality where patients could be referred to colleagues with a higher level of competencies and more experiences with paediatric dentoalveolar surgery...
August 13, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28803805/three-dimensional-evaluation-of-molar-buccolingual-inclinations-after-orthodontic-treatment-using-edgewise-mechanics
#3
Branson Billings, Lana Helms, Katherine Kula, Achint Utreja, George Eckert, Ahmed Ghoneima
OBJECTIVES: The purpose of this study was to measure changes in buccolingual inclination and in thickness of maxillary and mandibular buccal and lingual bone of maxillary and mandibular molars following orthodontic treatment using edgewise mechanics. MATERIALS AND METHODS: Cone-beam computed tomography scans of 48 patients taken before and after completion of comprehensive orthodontic treatment were collected for this retrospective study. Buccolingual molar inclinations were reported as angular measurements using the long axis of the teeth and inferior border of the nasal floor and inferior border of the mandible, respectively...
August 10, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28803674/healing-of-apical-periodontitis-after-nonsurgical-treatment-in-patients-with-type-2-diabetes
#4
Suman Arya, Jigyasa Duhan, Sanjay Tewari, Pankaj Sangwan, Veena Ghalaut, Sameer Aggarwal
INTRODUCTION: The purpose of this prospective study was to compare the success of primary root canal treatment between type 2 diabetic and nondiabetic patients and to investigate the effect of periapical healing on glycated hemoglobin (HbA1c) in type 2 diabetic patients with apical periodontitis. METHODS: Sixty mandibular molars with necrotic pulps and apical radiolucency (size ≥ 2 mm × 2 mm) were included in the study. Based on the HbA1c levels, patients were divided into 2 groups: type 2 diabetic (HbA1c ≥6...
August 10, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28797916/performance-of-pit-and-fissure-sealants-according-to-tooth-characteristics-a-systematic-review-and-meta-analysis
#5
REVIEW
Spyridon N Papageorgiou, Dionysia Dimitraki, Nikolaos Kotsanos, Katrin Bekes, Hubertus van Waes
OBJECTIVE: Aim: of this systematic review was to assess the clinical performance of sealants on various teeth in an evidence-based manner. SOURCES: Five databases were searched from inception to February 2017. DATA: Randomized clinical studies on humans. METHODS: After duplicate study selection, data extraction, and risk of bias assessment according to the Cochrane guidelines, Paule-Mandel random-effects meta-analyses of Relative Risks (RRs) and their 95% confidence intervals (CIs) were calculated...
August 7, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28796953/advanced-statistical-analyses-to-reduce-inconsistency-of-bond-strength-data
#6
T Minamino, A Mine, A Shintani, M Higashi, A Kawaguchi-Uemura, T Kabetani, R Hagino, D Imai, Y Tajiri, M Matsumoto, H Yatani
This study was designed to clarify the interrelationship of factors that affect the value of microtensile bond strength (µTBS), focusing on nondestructive testing by which information of the specimens can be stored and quantified. µTBS test specimens were prepared from 10 noncarious human molars. Six factors of µTBS test specimens were evaluated: presence of voids at the interface, X-ray absorption coefficient of resin, X-ray absorption coefficient of dentin, length of dentin part, size of adhesion area, and individual differences of teeth...
August 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28796952/implanted-dental-pulp-cells-fail-to-induce-regeneration-in-partial-pulpotomies
#7
F Mangione, M EzEldeen, C Bardet, J Lesieur, M Bonneau, F Decup, B Salmon, R Jacobs, C Chaussain, S Opsahl-Vital
Cell-based partial pulp regeneration is one of the promising approaches to obtain newly formed functional dentin-pulp complex. It relies on the preservation of the healthy tissue while regenerating the damaged pulp. The aim of this study was to investigate whether this regenerative process could be achieved by implanting porcine dental pulp cells (pDPCs) in pulp defects in the minipig. By split-mouth model, self-assembling injectable nanopeptide hydrogel, with and without pDPCs, was implanted after cameral pulpotomy in premolars and molars...
August 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28796346/fracture-of-nickel-titanium-rotary-instrument-during-root-canal-treatment-and-re-treatment-a-5-year-retrospective-study
#8
K Alfouzan, A Jamleh
AIM: To evaluate retrospectively the incidence of K3 nickel titanium rotary instrument fracture in referred cases during root canal treatment and re-treatment. METHODOLOGY: Clinical and radiographic reports of 12867 endodontic cases treated at the King Abdulaziz medical city between January 2010 and November 2015 were reviewed to obtain information on intra-canal fractured instruments with respect to the treatment performed, tooth type, and the size and at what level the instrument fractured (coronal, middle or apical)...
August 10, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28795618/distribution-of-dental-plaque-and-gingivitis-within-the-dental-arches
#9
Prem K Sreenivasan, Kakarla V V Prasad
Objective The natural accumulation of supragingival plaque on surfaces of human teeth is associated with gingival inflammation and the initiation of common oral diseases. This study evaluated the distribution of dental plaque and gingivitis scores within the dental arches after prophylaxis. Methods Adult subjects from the Dharwad, India area representing the general population who provided written informed consent were scheduled for screening. Healthy subjects over the age of 18 years, not currently requiring any medical or dental care, and presenting with a complement of at least 20 natural teeth were recruited for this parallel design study...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28793985/long-term-hyperglycemia-naturally-induces-dental-caries-but-not-periodontal-disease-in-type-1-and-type-2-diabetic-rodents
#10
Yutaka Nakahara, Kiyokazu Ozaki, Tetsuro Matsuura
Periodontal disease (PD) in diabetic patients is described as the 6th complication of diabetes. We have previously shown that diabetes increases dental caries, and carious inflammation might have a strong effect on the adjacent periodontal tissue in diabetic rodent models. However, the possibility that hyperglycemia may induce PD in diabetic animals could not be completely eliminated. The goal of this study was to confirm the presence of PD in diabetic animal models by preventing carious inflammation with fluoride administration...
August 9, 2017: Diabetes
https://www.readbyqxmd.com/read/28791977/comparative-evaluation-of-ankaferd-blood-stopper-ferric-sulfate-and-formocresol-as-pulpotomy-agent-in-primary-teeth-a-clinical-study
#11
B Ozmen, S Bayrak
AIM: The aim of the study was to provide a comparative evaluation of the clinical and radiographic success of Ankaferd blood stopper (ABS), formocresol (FC), and ferric sulfate (FS) as pulpotomy agent in primary teeth. SETTINGS AND DESIGN: This is a clinical study. MATERIALS AND METHODS: A total of 45 primary mandibular molar teeth in 26 children aged 6-9 were selected for the study. Teeth were randomly divided into three groups according to the pulpotomy agents (ABS, FC, FS)...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28791172/ontogenetic-variations-and-structural-adjustments-in-mammals-evolving-prolonged-to-continuous-dental-growth
#12
Helder Gomes Rodrigues, Rémi Lefebvre, Marcos Fernández-Monescillo, Bernardino Mamani Quispe, Guillaume Billet
Studying dental ontogeny in mammals can provide valuable insight on the evolution of their masticatory apparatus and their related adaptations. The multiple acquisitions of a prolonged to continuous growth of teeth in herbivorous mammals in response to high abrasion represent an intensively investigated issue. However, the ontogenetic and architectural patterns associated with these repeated dental innovations remain poorly known. Here, we focused on two case studies corresponding to distant mammalian clades, the extinct Mesotheriidae (Notoungulata), which shared some striking dental features with the extant Ctenodactylidae (Rodentia)...
July 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28791079/association-between-tooth-agenesis-and-skeletal-malocclusions
#13
Ana Maria Guerra Costa, Mariana Trevizan, Mírian Aiko Nakane Matsumoto, Raquel Assed Bezerra da Silva, Lea Assed Bezerra da Silva, Karla Carpio Horta, Fabio Lourenço Romano, Paulo Nelson-Filho, Erika Calvano Küchler
OBJECTIVES: The aim of this study was to evaluate the association between tooth agenesis and skeletal malocclusions in Brazilian non-syndromic orthodontic patients. MATERIAL AND METHODS: Pretreatment orthodontic records of 348 patients of both genders and with various skeletal malocclusions were examined. Tooth agenesis was evaluated in panoramic radiographs. Angular measurements were taken from lateral cephalometric radiographs to classify the patient's malocclusion as skeletal Class I, Class II and Class III...
April 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/28782099/knowledge-perceptions-and-clinical-application-of-the-shortened-dental-arch-concept-among-malaysian-government-dentists
#14
Siti Kamilah Mohd Kasim, Ishak Abdul Razak, Zamros Yuzadi Mohd Yusof
AIM: To assess the knowledge and perceptions of Malaysian government dentists regarding the shortened dental arch (SDA) concept and its application in clinical practice. BACKGROUND: The SDA concept refers to a specific type of dentition with intact anterior teeth and a reduction in posterior occlusal pairs. Dentists' knowledge and perceptions of the SDA concept can influence its application in clinical practice. METHODS: A self-administered questionnaire on the SDA concept was distributed to 326 government dentists in the states of Selangor and Kuala Lumpur, Malaysia...
August 7, 2017: International Dental Journal
https://www.readbyqxmd.com/read/28782092/hard-tissue-debris-removal-from-the-mesial-root-canal-system-of-mandibular-molars-with-ultrasonically-and-laser-activated-irrigation-a-micro-computed-tomography-study
#15
J Verstraeten, W Jacquet, R J G De Moor, M A Meire
This study is to investigate the efficacy of different irrigant activation techniques on removal of accumulated hard tissue debris (AHTD) in mesial roots of human mandibular molars. Extracted human mandibular molars with an isthmus between the mesial root canals were selected based on micro-CT (μCT) scans. The mesial canals were instrumented to an apical diameter ISO30 using ProTaper rotary files. Teeth were randomly assigned to three irrigant activation groups (n = 10): ultrasonically activated irrigation (UAI) using a size 20 Irrisafe for 3 × 20 s, laser-activated irrigation (LAI) with an Er:YAG laser (2940 nm) and plain 300 μm fiber tip inside the canal (20 mJ, 20 Hz, 3 × 20 s), and laser-activated irrigation with identical parameters with a 400 μm photon-induced photoacoustic streaming (PIPS) tip held at the canal entrance...
August 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28780718/clinical-and-radiographic-comparison-of-biodentine-mineral-trioxide-aggregate-and-formocresol-as-pulpotomy-agents-in-primary-molars
#16
P Juneja, S Kulkarni
AIM: To compare the clinical and radiographic success rates of three different pulpotomy agents in primary molars after 18 months. METHODS: The study was carried out with 51 primary molars of children aged 5-9 years old. The teeth were randomly assigned to the experimental or control groups. After coronal pulp removal and haemostasis, the remaining pulp tissue was covered with Biodentine(®) or mineral trioxide aggregate in the experimental groups. In the control group, formocresol was placed with a cotton pellet over the pulp tissue for 5 min and after removal the pulp tissue was covered with zinc oxide-eugenol (ZOE) paste...
August 5, 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28774336/damping-ratio-analysis-of-tooth-stability-under-various-simulated-degrees-of-vertical-alveolar-bone-loss-and-different-root-types
#17
Kuo-Ning Ho, Sheng-Yang Lee, Haw-Ming Huang
BACKGROUND: The purpose of this study was to evaluate the feasibility of using damping ratio (DR) analysis combined with resonance frequency (RF) and periotest (PTV) analyses to provide additional information about natural tooth stability under various simulated degrees of alveolar vertical bone loss and various root types. METHODS: Three experimental tooth models, including upper central incisor, upper first premolar, and upper first molar were fabricated using Ti6Al4V alloy...
August 3, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28773126/biomechanical-loading-evaluation-of-unsintered-hydroxyapatite-poly-l-lactide-plate-system-in-bilateral-sagittal-split-ramus-osteotomy
#18
Shintaro Sukegawa, Takahiro Kanno, Yoshiki Manabe, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Masanori Masui, Yoshihiko Furuki
OSTEOTRANS MX(®) (Takiron Co., Ltd., Osaka, Japan) is a bioactive resorbable maxillofacial osteosynthetic material composed of an unsintered hydroxyapatite/poly-l-lactide composite, and its effective osteoconductive capacity has been previously documented. However, the mechanical strength of this plate system is unclear. Thus, the aim of this in vitro study was to assess its tensile and shear strength and evaluate the biomechanical intensity of different osteosynthesis plate designs after sagittal split ramus osteotomy by simulating masticatory forces in a clinical setting...
July 7, 2017: Materials
https://www.readbyqxmd.com/read/28764313/clinician-corner-a-simple-and-efficient-modified-goshgarian-arch-t-arch-appliance-for-correcting-single-tooth-scissor-bite
#19
Vikram Rajendra Pagar Patil, N G Toshniwal, Sayali Vikram Pagar Patil, Pawankumar Dnyandeo Tekale, Harshal Ashok Patil
Scissor bite is a rare form of malocclusion that is often accompanied by varying degrees of facial asymmetry. Correction and treatment of scissor bite in posterior teeth is a challenging job for an orthodontist. There are several treatment options for correction of scissor bite in posterior teeth but some have their own ill-effects on the dentition thus contributing further to the problem and some require patient compliance which compromises the outcome of the treatment. Therefore to overcome these drawbacks we have designed a new appliance to correct the molar scissor bite...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28762350/comparative-evaluation-of-microleakage-between-bulk-esthetic-materials-versus-resin-modified-glass-ionomer-to-restore-class-ii-cavities-in-primary-molars
#20
Vellore Kannan Gopinath
AIM: The aim of the study was to assess the microleakage of one high-viscosity conventional glass ionomer cement (GIC) and a bulk-fill composite resin, in comparison to a resin-modified GIC in Class II restorations in primary molars. MATERIALS AND METHOD: Standardized Class II slot cavity preparations were prepared in exfoliating primary molars. Teeth were restored using one of the three materials tested (n = 10): SonicFill bulk-fill composite resin (SF), EQUIA Fil conventional reinforced GIC (EQF), and Vitremer resin-reinforced GIC (VT)...
July 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
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