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https://www.readbyqxmd.com/read/28298977/effect-of-addition-of-nano-hydroxyapatite-particles-on-wear-of-resin-modified-glass-ionomer-by-tooth-brushing-simulation
#1
Kiana Poorzandpoush, Ladan-Ranjbar Omrani, Shiva H Jafarnia, Parisa Golkar, Mohammad Atai
BACKGROUND: Recently, incorporation of nanohydroxyapatite (NHA) has been suggested to improve the mechanical properties of glass ionomers (GIs). This study aimed to assess the effect of addition of NHA on wear of resin modified glass ionomer (RMGI) by tooth brushing simulation. MATERIAL AND METHODS: In this in vitro, experimental study, NHA in 1, 2, 5, 7 and 10wt% concentrations was added to Fuji II LC RMGI powder, and 48 samples (5×5mm) in five experimental and one control group (n=8) were fabricated...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28297088/retention-and-relapse-in-clinical-practice
#2
S J Littlewood, S Kandasamy, G Huang
Maintaining teeth in their corrected positions following orthodontic treatment can be extremely challenging. Teeth have a tendency to move back towards the original malocclusion as a result of periodontal, gingival, occlusal and growth related factors. However, tooth movement can also occur as a result of normal age changes. Because orthodontics is unable to predict which patients are at risk of relapse, those which will remain stable and the extent of relapse that will occur in the long-term, clinicians need to treat all patients as if they have a high potential to relapse...
March 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28288297/early-rehabilitation-of-incisors-with-dentinogenesis-imperfecta-type-ii-case-report
#3
Ana Paula Ca Beltrame, Maíra Mery Rosa, Ricardo At Noschang, Izabel Cs Almeida
Dentinogenesis imperfecta is an phenotypic alteration in the formation of the organic matrix. It causes the rapid and progressive wear of tooth structure, which may compromise tooth function and aesthetics. This is a case of a 1y, 8m-old child with dentinogenesis imperfecta. All teeth presented with an opalescent appearance and grayish color hue. Compromised structural integrity was noted as excessive wear and fracturing of the enamel from the dentin layer. With low doses of midazolam (oral) and chloral hydrate (rectal) administration, in a hospital environment, sedation was used to aid full mouth rehabilitation...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28280760/the-shear-bond-strength-of-porcelain-laminate-to-prepared-and-unprepared-anterior-teeth
#4
Ali Asghar Alavi, Zeinab Behroozi, Farid Nik Eghbal
STATEMENT OF THE PROBLEM: Porcelain laminate veneer is an esthetic restoration used as an alternative to full veneer crowns and requires minimal tooth preparation. In restoration with porcelain laminate veneers, both the longevity of the laminate and conservation of the sound tooth structure are imperative. PURPOSE: The present study aimed to investigate the shear bond strength of porcelain laminates to prepared- and unprepared- anterior teeth in order to compare their longevity and success rate...
March 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28267825/clinical-monitoring-of-tooth-wear-progression-in-patients-over-a-period-of-one-year-using-cad-cam
#5
Khaled E Ahmed, John Whitters, Xiangyang Ju, S Gareth Pierce, Charles N MacLeod, Colin A Murray
PURPOSE: The aim of this study was to clinically monitor the progression of tooth wear over a period of 1 year in a cohort of referred tooth wear patients through the use of a computer-aided design/computer-assisted manufacture (CAD/CAM) scanner and a standardized scanning/assessment methodology. MATERIALS AND METHODS: Polyether impressions were made of 11 participants (130 teeth) at baseline and at 1 year. Impressions were poured in type IV dental stone and the anterior teeth were 3D scanned...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28265518/digital-reconstruction-of-the-mandible-of-an-adult-lesothosaurus-diagnosticus-with-insight-into-the-tooth-replacement-process-and-diet
#6
Lara Sciscio, Fabien Knoll, Emese M Bordy, Michiel O de Kock, Ragna Redelstorff
Fragmentary caudal ends of the left and right mandible assigned to Lesothosaurus diagnosticus, an early ornithischian, was recently discovered in the continental red bed succession of the upper Elliot Formation (Lower Jurassic) at Likhoele Mountain (Mafeteng District) in Lesotho. Using micro-CT scanning, this mandible could be digitally reconstructed in 3D. The replacement teeth within the better preserved (left) dentary were visualised. The computed tomography dataset suggests asynchronous tooth replacement in an individual identified as an adult on the basis of bone histology...
2017: PeerJ
https://www.readbyqxmd.com/read/28240290/the-diet-of-the-first-europeans-from-atapuerca
#7
Alejandro Pérez-Pérez, Marina Lozano, Alejandro Romero, Laura M Martínez, Jordi Galbany, Beatriz Pinilla, Ferran Estebaranz-Sánchez, José María Bermúdez de Castro, Eudald Carbonell, Juan Luís Arsuaga
Hominin dietary specialization is crucial to understanding the evolutionary changes of craniofacial biomechanics and the interaction of food processing methods' effects on teeth. However, the diet-related dental wear processes of the earliest European hominins remain unknown because most of the academic attention has focused on Neandertals. Non-occlusal dental microwear provides direct evidence of the effect of chewed food particles on tooth enamel surfaces and reflects dietary signals over time. Here, we report for the first time the direct effect of dietary abrasiveness as evidenced by the buccal microwear patterns on the teeth of the Sima del Elefante-TE9 and Gran Dolina-TD6 Atapuerca hominins (1...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28219251/childhood-intelligence-and-early-tooth-wear-patterns
#8
Tuomo Heikkinen, Jaana Rusanen, Koshi Sato, Paula Pesonen, Virpi Harila, Lassi Alvesalo
OBJECTIVE: The aim of this study is to explore the relationships between early dental wear patterns and preschool IQ (Intelligence Quotient, by Stanford-Binet) of the child to illuminate the historic relationship of mental queries and bruxism. METHODS: The dental study participants were 864 Euro-American preschool and school children whose IQs were tested for school maturity purposes at the age of 4 years, followed by dental data in a cross-sectional manner at the mean age of 7...
February 20, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28216839/a-study-on-the-wear-of-enamel-caused-by-monolithic-zirconia-and-the-subsequent-phase-transformation-compared-to-two-other-ceramic-systems
#9
Amreen Rupawala, Smita I Musani, Pallavi Madanshetty, Ramandeep Dugal, Umang D Shah, Ektaa J Sheth
PURPOSE: The purpose of this in vitro research project was to evaluate and compare the wear behavior of human tooth enamel opposing monolithic zirconia and other different ceramic restorative materials and also to observe the tetragonal to monoclinic phase transformation in zirconia-based ceramics that may occur while simulating wear occurring at room temperature in a wet environment. MATERIALS AND METHODS: A total of sixty samples were prepared for this study. Fifteen discs of glazed zirconia, 15 discs of polished zirconia without glaze, 15 discs of metal ceramic, and 15 discs of lithium disilicate were fabricated...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28213765/association-between-signs-and-symptoms-of-bruxism-and-presence-of-tori-a-systematic-review
#10
Eduardo Bertazzo-Silveira, Juliana Stuginski-Barbosa, André Luís Porporatti, Bruce Dick, Carlos Flores-Mir, Daniele Manfredini, Graziela De Luca Canto
OBJECTIVE: This systematic review aims to answer the question: "Is there an association between any specific signs and symptoms of bruxism and the presence of tori?" MATERIAL AND METHODS: Observational studies, which evaluated the association between signs and symptoms of bruxism and tori, were selected. Signs and symptoms of bruxism (such as teeth grinding, jaw clenching, abnormal tooth wear, facial muscle hypertrophy, pain, or fatigue) had to be determined by questionnaire or anamnesis and tori within clinical assessment...
February 17, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28202072/a-pilot-randomised-controlled-trial-evaluating-mini-and-conventional-implant-retained-dentures-on-the-function-and-quality-of-life-of-patients-with-an-edentulous-mandible
#11
Sarra Jawad, Craig Barclay, William Whittaker, Martin Tickle, Tanya Walsh
BACKGROUND: Total tooth loss (edentulism) can be a debilitating condition, impacting on ability to chew, speak and interact with others. The most common treatment is with complete removable dentures, which may be successful, but in the lower jaw, bone resorption that worsens over time makes denture-wearing difficult. Two dental implants in the mandible to retain the lower denture has been advocated as the gold standard of treatment, but has not been universally provided due largely to financial constraints and also patient fear...
February 15, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28190924/hyperglycemia-simultaneously-induces-initial-caries-development-and-enhances-spontaneous-occlusal-surface-wear-in-molar-teeth-related-to-parotid-gland-disorder-in-alloxan-induced-diabetic-rats
#12
Taiki Nishimoto, Yasushi Kodama, Tetsuro Matsuura, Kiyokazu Ozaki, Yoshihiko Taniguchi
Diabetes and salivary gland dysfunction are major factors that induce dental caries in experimental animals, but there are no reports analyzing the association of dental caries and salivary glands in an animal model of diabetes mellitus (DM). To clarify the initial development of dental caries and preceding salivary gland disorder, we performed a histopathological analysis on teeth and salivary glands in diabetic Wistar rats 7 weeks after alloxan treatment (DM group) in comparison with nondiabetic rats (Non-DM group) and functional analysis on saliva secretion during the experimental period...
January 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28176000/multifactorial-logistic-regression-analysis-of-factors-associated-with-the-incidence-of-erosive-tooth-wear-among-adults-at-different-ages-in-tokyo
#13
Yuichi Kitasako, Y Sasaki, T Takagaki, A Sadr, J Tagami
OBJECTIVES: The aim of this study was to evaluate factors associated with the incidence of erosive tooth wear (ETW) among adults at different ages in Tokyo using multifactorial logistic regression analysis. MATERIALS AND METHODS: The study sample consisted of a total of 1108 subjects aged 15 to 89 years in Tokyo, Japan. Two examiners evaluated ETW in a full-mouth recording. The subjects were asked to complete a self-administered daily diet, habit, and health condition questionnaire...
February 7, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28170452/implications-of-wear-at-the-titanium-zirconia-implant-abutment-interface-on-the-health-of-peri-implant-tissues
#14
Andrew Tawse-Smith, Sunyoung Ma, Warwick J Duncan, Andrew Gray, Malcolm R Reid, Alison M Rich
PURPOSE: To investigate the presence of metallic particles in the peri-implant mucosa around titanium dental implants after 5 years of loading using single-implant crowns with respect to clinical signs of peri-implant inflammation. MATERIALS AND METHODS: Sixteen participants from an ongoing, prospective, single-arm clinical trial who had received titanium dental implants restored with single maxillary crowns veneered to zirconia abutments were available for the study...
February 7, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28167334/in-vitro-enamel-erosion-and-abrasion-inhibiting-effect-of-different-fluoride-varnishes
#15
Adílis Kalina Alexandria, Thiago Isidro Vieira, Matheus Melo Pithon, Tatiana Kelly da Silva Fidalgo, Andréa Fonseca-Gonçalves, Ana Maria Gondim Valença, Lúcio Mendes Cabral, Lucianne Cople Maia
OBJECTIVE: To investigate the erosion and abrasion inhibiting effect of CPP-ACP/NaF and xylitol/NaF varnishes. METHODS: Bovine enamel samples (n=40) were exposed to the following treatments (n=10): NaF varnish (Duraphat(®), positive control); CPP-ACP/NaF varnish (MI varnishTM); xylitol/NaF (Profluorid(®)) or distilled and deionized water (MilliQ(®), negative control). The samples were submitted for 3days to 4 cycles/day of erosion (5min in Sprite Zero) and 2 cycles of abrasion/day after the first and last erosive challenge, with a toothbrush machine and slurries of a placebo toothpaste for 15s (50 strokes/s)...
January 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28161365/a-randomised-clinical-trial-to-determine-the-abrasive-effect-of-the-tongue-on-human-enamel-loss-with-and-without-a-prior-erosive-challenge
#16
J Seong, N Claydon, E Macdonald, S Garner, R G Newcombe, N West
OBJECTIVES: To investigate the abrasive effect of the tongue on human enamel loss with and without a prior dietary acid challenge in an in situ model. METHODS: A single centre, single blind, randomly allocated, split mouth, four treatment regimen, in situ study in healthy adult volunteers was undertaken. Twenty four subjects wore two lower intra-oral appliances each fitted with 4 human enamel samples 6h/day for 15 days. The samples were treated with either 50ml orange juice or water for 5min ex vivo 4x/day; prior to being licked or not licked with the subject's tongue for 60s...
February 1, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28160942/correlation-between-symptoms-and-external-characteristics-of-cracked-teeth-findings-from-the-national-dental-practice-based-research-network
#17
Thomas J Hilton, Ellen Funkhouser, Jack L Ferracane, Gregg H Gilbert, Camille Baltuck, Paul Benjamin, David Louis, Rahma Mungia, Cyril Meyerowitz
BACKGROUND: Cracked teeth are ubiquitous in the adult dentition. The objective of this study was to determine which patient traits and behaviors and external tooth and crack characteristics correlate with cracked teeth being symptomatic. METHODS: Dentists in The National Dental Practice-Based Research Network enrolled a convenience sample of patients each with a single, vital posterior tooth with at least 1 observable external crack in this observational study; they enrolled 2,975 cracked teeth from 209 practitioners...
February 2, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28155241/effects-of-attention-deficit-hyperactivity-disorder-signs-and-socio-economic-status-on-sleep-bruxism-and-tooth-wear-among-schoolchildren-structural-equation-modelling-approach
#18
Isabella Mota-Veloso, Roger Keller Celeste, Cynthia Pimenta Fonseca, Maria Eliza Consolação Soares, Leandro Silva Marques, Maria Letícia Ramos-Jorge, Joana Ramos-Jorge
BACKGROUND: The prevalence of both bruxism and attention deficit hyperactivity (ADHD) has increased in recent years. AIM: This study evaluated the direct and indirect effects of signs of ADHD, reported by parents/caregivers and teachers, with sleep bruxism. In addition, this study explores the effects of socio-economic status (SES) on sleep bruxism. DESIGN: This cross-sectional study was performed in Diamantina, Brazil, with 851 randomly selected schoolchildren aged 6-12 years...
February 3, 2017: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/28133715/factors-affecting-dental-biofilm-in-patients-wearing-fixed-orthodontic-appliances
#19
Li Mei, Joyce Chieng, Connie Wong, Gareth Benic, Mauro Farella
BACKGROUND: The aim of this study is to investigate the amount and the distribution of biofilm in patients wearing fixed appliances and its relation with age, gender, frequency of tooth brushing, and patient motivation. METHODS: The sample comprised 52 patients (15.5 ± 3.6 years old, 30 females and 22 males) wearing fixed orthodontic appliances. Dental biofilm was assessed using a modified plaque index (PI). A questionnaire was used to collect patient's information, including gender, age, treatment motivation, and frequency of tooth brushing...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28118419/temporomandibular-disorder-pain-and-related-factors-in-an-adult-population-a-cross-sectional-study-in-southern-sweden
#20
Susanna Gillborg, Sigvard Åkerman, Nina Lundegren, Ewa Carin Ekberg
AIMS: To measure the prevalence of temporomandibular disorder (TMD) pain and examine its association with gender and other factors in an adult population in southern Sweden. METHODS: In 2006, a questionnaire was sent to randomly selected individuals (n = 10,000) aged 20 to 89 years. Two specific questions were used to screen individuals with TMD pain, and an additional 16 questions were analyzed regarding the subjects' relation to TMD pain. The chi-squared test was used to compare the distribution of categorical variables, and factors possibly related to TMD pain were analyzed by using logistic regression models with a likelihood-ratio test...
January 2017: Journal of Oral & Facial Pain and Headache
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