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https://www.readbyqxmd.com/read/28645100/interferential-effect-of-the-over-erupted-third-molar-on-chewing-movement
#1
Shaoxiong Guo, Baoyong Li, Kun Qi, Mian Zhang, Han Zhang, Donghui Guo, Xiaodong Liu, Meiqing Wang
OBJECTIVE: To clarify whether over-eruption of the mandibular third molar can disturb chewing movement. METHODS: Eighteen patients with a unilateral mandibular over-erupted third molar confirmed by both study cast observation and T-scan occlusal detection were selected from a sample of patients with complaints of temporomandibular disorder (TMD) symptoms. A unilateral gum-chewing trace was recorded separately for left and right side chewing by an electrognathography system...
June 15, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28645095/tooth-coronal-index-and-pulp-tooth-ratio-in-dental-age-estimation-on-digital-panoramic-radiographs-a-comparative-study
#2
Supreet Jain, Ravleen Nagi, Minal Daga, Ashutosh Shandilya, Aastha Shukla, Abhinav Parakh, Afshan Laheji, Rahul Singh
BACKGROUND: Assessment of an age of an individual whether living or dead through teeth is one of the most reliable and simple method to calculate age than skeletal remains especially when they are in poor conditions. OBJECTIVES: The study was carried out with aim of (i) to evaluate reliability of dental age assessment through two different methods for adults i.e. tooth coronal index and pulp/tooth ratio using digital panoramic radiographs and (ii) to compare these methods for their accuracy in age determination...
May 12, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28644755/a-contemporary-examination-of-first-and-second-permanent-molar-emergence
#3
B T Pahel, W F Vann, K Divaris, R G Rozier
The emergence of first permanent molars (FPMs) and second permanent molars (SPMs) is an important developmental milestone influencing caries risk and the timing of sealant placement. Emergence times have been shown to vary by sex and race/ethnicity, while recent reports suggest a positive association with adiposity. Amid the changing demographics of the US population and the rising rates of pediatric overweight/obesity, we sought to examine the association of body mass index (BMI) with FPM/SPM emergence in a representative sample of US children and adolescents...
June 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28644107/gingival-perfusion-and-tissue-biomarkers-during-early-healing-of-post-extraction-regenerative-procedures-a-prospective-case-series
#4
Lamees Alssum, Timothy D Eubank, Sashwati Roy, Barbaros S Erdal, Vedat O Yildiz, Dimitris N Tatakis, Binnaz Leblebicioglu
BACKGROUND: Post-extraction alveolar bone loss, mostly affecting the buccal plate, occurs despite regenerative procedures. To better understand possible determinants, this prospective case series assessed gingival blood perfusion and tissue molecular responses in relation to post-extraction regenerative outcomes. METHODS: Adults scheduled to receive bone grafting in maxillary, non-molar, single tooth extraction site were recruited. Clinical documentation included probing pocket depth (PD), keratinized tissue width (KT), tissue biotype (TB), plaque (P) and bleeding...
June 23, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28643927/co2-low-level-laser-therapy-has-an-early-but-not-delayed-pain-effect-during-experimental-tooth-movement
#5
T Deguchi, D G Kim, H Kamioka
OBJECTIVES: To test the hypothesis that the use of low-level laser therapy (LLLT) reduces elevated pain by controlling the release of neurochemicals during orthodontic tooth movement. SETTING AND SAMPLE POPULATION: Department of Orthodontics and Dentofacial Orthopedics, Okayama University. Sixty-five Sprague Dawley rats were subjected to tooth movement and LLLT. MATERIALS AND METHODS: Adult Sprague Dawley rats were used in this study. Groups included day 0 controls, irradiation only controls and with or without irradiation sacrificed at 1, 3, 5, 7 and 14 days after tooth movement (n=5 each, total n=65)...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643923/micro-anatomical-responses-in-periodontal-complexes-of-mice-to-calibrated-orthodontic-forces-on-the-crown
#6
A Pal, L Chen, L Yang, F Yang, B Meng, A H Jheon, S P Ho
OBJECTIVE: Correlating mechanical forces with quantifiable physical changes in the dentoalveolar complex. SETTING AND SAMPLE POPULATION: Male 6-week C57BL/6 mice (N=3), micro X-ray-computed tomography; post-analysis software to extract physical changes in periodontal ligament (PDL)-space. MATERIALS AND METHODS: Silicone-elastic bands were placed between maxillary molars for 1 week, with the contralateral side as internal control. Average displacements between crowns and roots, and changes in PDL-spaces were evaluated by registering X-ray tomograms of experimental and control hemi-maxillae...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643913/effect-of-exogenous-retinoic-acid-on-tooth-movement-and-periodontium-healing-following-tooth-extraction-in-a-rat-model
#7
C Nishio, P Rompré, F Moldovan
OBJECTIVES: To evaluate the effect of isotretinoin on orthodontic tooth movement (OTM) and wound healing following exodontia. SETTING AND SAMPLE POPULATION: Sixteen 40-day-old male Wistar rats were divided into two groups: (a) OTM and (b) tooth extraction (TE) of the upper 1st molar and OTM. The experimental animals were treated with isotretinoin (7.5 mg/kg) and the control animals with oil solution for 37 days. MATERIALS AND METHODS: The OTM and bone volume were evaluated by the micro-CT and the periodontium healing was assessed by immunohistochemistry for VEGF-C, COX-2 and IL-1ß...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643908/jaw-mechanics-in-dolichofacial-and-brachyfacial-phenotypes-a-longitudinal-cephalometric-based-study
#8
L R Iwasaki, Y Liu, H Liu, J C Nickel
OBJECTIVES: To determine whether dolichofacial (Frankfort horizontal mandibular plane angle (FHMPA) ≥30°) vs brachyfacial (FHMPA ≤22°) phenotypes differ in temporomandibular joint (TMJ) loads and whether these differences correlate longitudinally with mandibular ramus height (Condylion-Gonion, Co-Go). SETTING AND SAMPLE POPULATION: Lateral and posteroanterior cephalographs from ten dolichofacial and ten brachyfacial individuals made at average ages of 6 (T1), 12 (T2) and 18 (T3) years and available online (http://www...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643825/-a-phd-completed-10-implant-supported-removable-partial-dentures-in-a-kennedy-class-i-situation-in-the-mandible
#9
C Jensen-Louwerse
Implant-supported removable partial dentures in the mandible often cause problems, which means that patients wear their dentures seldom if at all. A solution is to place implants that the dentures can be snapped onto. There is, however, no consensus about the best position of the implants in the mandible yet. In addition, it is worthwhile to balance the cost of treatment with its effectiveness. In a randomised cross-over clinical trial involving 30 patients with a shortened dental arch, the implant-supported removable partial denture in the mandible was evaluated based on the experience of the patient, mean time of wearing, chewing ability and the clinical and radiographic parameters in relation to 2 different implant positions: 2 in the pre-molar region or 2 in the molar region...
June 2017: Nederlands Tijdschrift Voor Tandheelkunde
https://www.readbyqxmd.com/read/28643401/novel-navigation-technique-for-the-endodontic-treatment-of-a-molar-with-pulp-canal-calcification-and-apical-pathology
#10
Xilin Shi, Shiyong Zhao, Weidong Wang, Qianzhou Jiang, Xuechao Yang
Apical periodontitis, the inflammation of periapical tissue, commonly requires root canal treatment to achieve apical healing. However, if it is accompanied by pulp canal calcification, the treatment becomes complicated, and locating the root canal can be challenging. This case report describes a novel approach for treating a molar with pulp canal calcification and apical pathology. Due to the risk of perforation during treatment, a digitally printed template was used to assist in accurately locating the root canal...
June 23, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28642924/influence-of-niobium-pentoxide-addition-on-the-properties-of-glass-ionomer-cements
#11
Isadora Martini Garcia, Vicente Castelo Branco Leitune, Gabriela De Souza Balbinot, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
Objective: To determine the influence of niobium pentoxide (Nb2O5) addition on the physical and chemical properties of glass ionomer cements (GICs). Materials and methods: Five, 10 or 20 wt.% of Nb2O5 were incorporated into commercial GICs (Maxxion R, Vitro Molar, Vitro Fil R) and one group of each GIC remained without Nb2O5 (control groups). The GICs were evaluated by Knoop hardness, compressive strength, acid erosion, particle size and radiopacity. Data were analyzed by two-way ANOVA followed by Tukey's test...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642919/correlation-between-antioxidant-activity-and-bonding-strength-on-bleached-enamel
#12
Hellen Caroliny De Carvalho, Ricardo Danil Guiraldo, Regina Célia Poli-Frederico, Sandra Mara Maciel, Sandra Kiss Moura, Murilo Baena Lopes, Sandrine Bittencourt Berger
Objective: This study used the 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) method to evaluate the percentage of antioxidant activity (%AA) of green tea (GT) and sodium ascorbate (SA) gel in three concentrations (10%, 20% and 30%), and the influence of these concentrations on the microshear bond strength (μ-SBT) values of bleached enamel, using 10% carbamide peroxide (CP). Materials and methods: Eighty intact third molars were selected to perform the μ-SBT test, and were randomly divided into eight experimental groups: G1: positive control - no treatment; G2: negative control - bleached with CP; G3: PC +10% GT; G4: PC +20% GT; G5: PC +30% GT; G6: PC +10% SA; G7: PC +20% SA and G8: PC +30% SA...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642913/the-effect-of-petroleum-jelly-light-cured-varnish-and-different-storage-media-on-the-flexural-strength-of-glass-ionomer-dental-cements
#13
Kristina Gorseta, Domagoj Glavina, Tomislav Skrinjaric, Beata Czarnecka, John W Nicholson
This study determined the influence of coating with either petroleum jelly or light-cured varnish and storage medium on the flexural strength of glass-ionomer cements (GIC). The flexural strength of two glass-ionomer cements (Fuji Equia Fil and Ketac Molar Aplicap) was measured. Specimens (2 × 2 × 25 mm) were prepared in three groups: uncoated, coated with petroleum jelly, or coated with light-cured varnish (EquiaCoat) cured for 20 s using a cure lamp (Bluephase G2, Ivoclar Vivadent, Schaan, Liechtenstein)...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642912/influence-of-10-sodium-ascorbate-gel-application-time-on-composite-bond-strength-to-bleached-enamel
#14
Cintia Gaio Murad, Suellen Nunes de Andrade, Lucio Ramos Disconzi, Eliseu Aldrighi Munchow, Evandro Piva, Renata Correa Pascotto, Sandra Kiss Moura
Objective To analyze bond strength to bleached enamel following application of 10% sodium ascorbate gel. Material and methods Forty third molars were allocated into five groups (n = 8): GP - unbleached specimens restored with composite resin; GN - specimens restored immediately after bleaching; and G15; G30 and G60 (test groups) - bleached specimens treated with 10% sodium ascorbate gel for 15, 30 and 60 min before restoration. The teeth were sectioned and the buccal and lingual faces were restored. After storage in distilled water (37 °C/24 h), sticks of ±0...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642911/a-retrospective-multicenter-study-comparing-metal-ceramic-and-composite-single-crowns-performed-in-public-general-dentistry-5-year-results
#15
Jennie Overmeer, Birger Narby, Lars Hjalmarsson, Kristina Arnrup, Alf Eliasson
Objective The aim of this study was to evaluate and compare the 5-year survival and complication rate of metal-ceramic (MC) and composite single crowns performed within Public Dental Service, general dentistry, in three Swedish counties and with patients' gender, tooth position, root canal treatment and the presence of a post-and-core taken into account. Methods Data were collected from dental records of 600 patients who had received either an MC (n = 300) or a composite (n = 300) crown on a premolar or molar tooth in the year 2005 and where 5 years of follow-up data were available...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642827/vertical-and-transverse-management-with-transpalatal-arches-in-an-adult-with-class-iii-malocclusion
#16
R M Yañez-Vico, M Cadenas de Llano Perula, E Solano-Reina
The transpalatal arch might be one of the most common intraoral auxiliary fixed appliances used in orthodontics in order to provide dental anchorage. The aim of the present case report is to describe a case in which an adult patient with a tendency to class III, palatal compression, and bilateral posterior crossbite was treated with double transpalatal bars in order to control the torque of both the first and the second molars. Double transpalatal arches on both first and second maxillary molars are a successful appliance in order to control the posterior sectors and improve the torsion of the molars...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28642569/no-evidence-that-bonding-is-needed-for-amalgam-restorations
#17
James R Keenan, Analia Veitz-Keenan
Data sourcesRelevant databases were searched for the review such as the Cochrane Oral Health Group Trials Register, Medline, EMBASE, clinical trials.gov, WHO International Clinical Trials Registry Platform.Study selectionRandomised controlled trials comparing adhesively bonded versus non-bonded class I and II amalgam restorations in permanent molars and premolars.Data extraction and synthesisTwo reviewers independently screened papers and extracted data.ResultsOne trial with 31 patients who received 113 restorations was included...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28642558/no-differences-in-longevity-of-direct-and-indirect-composite-restorations
#18
Marie A Congiusta
Data sourcesMedline, Cochrane Library, Web of Science, Scopus, Latin American and Caribbean Health Sciences (LILACS), Brazilian Library of Dentistry (BBO), clinicaltrials.gov and SIGLE databases.Study selectionOnly randomised clinical trials were considered that compared direct vs indirect composite restorations, with or without cusp involvement, having a follow-up period of two years or greater.Data extraction and synthesisTwo reviewers selected studies for inclusion, abstracted data and assessed risk of bias...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28642551/aesthetic-preformed-crowns-for-primary-teeth
#19
Greig D Taylor
Data sourcesMedline, Cochrane central register of controlled trials, US National Institutes of Health Trials Register and the World Health Organization International Clinical Trials Registry Platform.Study selectionEnglish language randomised clinical trials comparing APCs with conventional restorative techniques for primary teeth.Data extraction and synthesisStudy selection and data abstraction were conducted independently by two reviewers. Risk of bias was assessed using the Cochrane risk of bias tool. Study characteristics and results were described qualitatively...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28641944/effect-of-antimony-oxide-on-the-shielding-properties-of-some-sodium-boro-silicate-glasses
#20
A M Zoulfakar, A M Abdel-Ghany, T Z Abou-Elnasr, A G Mostafa, S M Salem, H H El-Bahnaswy
Some sodium-silicate-boro-antimonate glasses having the molecular composition [(20) Na2O - (20) SiO2 - (60-x) B2O3 - (x) Sb2O3 (where x takes the values 0, 5 … or 20)] have been prepared by the melt quenching method. The melting and annealing temperatures were 1500 and 650K respectively. The amorphous nature of the prepared samples was confirmed by using X-ray diffraction analysis. Both the experimental and empirical density and molar volume values showed gradual increase with increasing Sb2O3 content. The empirical densities showed higher values than those obtained experimentally, while the empirical molar volume values appeared lower than those obtained experimentally, which confirm the amorphous nature and randomness character of the studied samples...
June 19, 2017: Applied Radiation and Isotopes
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