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https://www.readbyqxmd.com/read/27908555/dental-pathology-of-the-hoary-marmot-marmota-caligata-groundhog-marmota-monax-and-alaska-marmot-marmota-broweri
#1
J N Winer, B Arzi, D M Leale, P H Kass, F J M Verstraete
Museum specimens (maxillae and mandibles) of the three marmot species occurring in Alaska (Marmota caligata [n = 108 specimens], Marmota monax [n = 30] and Marmota broweri [n = 24]) were examined macroscopically according to predefined criteria. There were 71 specimens (43.8%) from female animals, 69 (42.6%) from male animals and 22 (13.6%) from animals of unknown sex. The ages of animals ranged from neonatal to adult, with 121 young adults (74.4%) and 41 adults (25.3%) included, and 168 excluded from study due to neonatal/juvenile age or incompleteness of specimens (missing part of the dentition)...
November 28, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27905856/1-25-dihydroxyvitamin-d3-stimulates-odontoblastic-differentiation-of-human-dental-pulp-stem-cells-in-vitro
#2
Goksen Mucuk, Elif Sepet, Mine Erguven, Ozlem Ekmekci, Ayhan Bilir
BACKGROUND: 1,25-dihydroxyvitamin D3 (1,25-OH D3) plays an important role in mineralized tissue metabolism, including teeth. However, few studies have addressed its role in odontoblastic differentiation of human dental pulp-stem cells (hDPSCs). AIM: This study aimed to understand the influence of various concentrations of 1,25-OH D3 on the proliferation capacity and early dentinogenesis responses of hDPSCs. MATERIALS AND METHODS: hDPSCs were obtained from the impacted third molar teeth...
December 1, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27902609/influence-of-oral-health-behavior-and-sociodemographic-factors-on-remaining-teeth-in-korean-adults-2010-2012-korea-national-health-and-nutrition-examination-survey
#3
In-Seok Song, Kyungdo Han, Yeon-Jo Choi, Jae-Jun Ryu, Jun-Beom Park
In this study, the number and location of remaining teeth were analyzed according to sociodemographic variables, anthropometric measurements, and oral health behavior patterns. The hypothesis was that the number and location of remaining teeth would be affected by oral health behavior and by sociodemographic factors, such as education levels, household income, and urban/rural residency.This nationwide cross-sectional study was performed with a total of 36,026 representative Korean adults aged 19 and older. The data were taken from the 2012-2012 Korea National Health and Nutrition Examination Survey...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27901556/apical-transportation-during-removal-of-root-canal-filling-with-different-retreatment-systems
#4
Baran C Sağlam, Ersan Çiçek, Mustafa M Koçak, Sibel Koçak, Bağdagül H Kıvanç
INTRODUCTION: This study aimed to compare apical transportation during retreatment using ProTaper Universal retreatment (PTUR), Mtwo R and D-RaCe instruments in curved root canals. METHODS: 36 extracted mandibular molar teeth with curved mesiobuccal roots were selected. The teeth were embedded into acrylic blocks. The blocks were fixed on the experimental setup. After determining the working length (WL), mesiobuccal canals were prepared with ProTaper Universal rotary instruments to size F1 (20/0...
November 29, 2016: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/27900529/effectiveness-of-pit-and-fissure-sealants-bonded-with-different-adhesive-systems-a-prospective-randomized-controlled-trial
#5
Gizem Erbas Unverdi, Stephan Atilla Atac, Zafer Cavit Cehreli
OBJECTIVES: To evaluate and compare the clinical retention of a resin-based fissure sealant placed with an intermediate layer of etch-and-rinse (ER) or self-etch (SE) adhesives. MATERIALS AND METHODS: Two hundred twenty-eight sealants were placed in 57 children with previously unsealed, caries-free permanent first molars, employing a split-mouth design. The teeth were randomized into four groups (n = 57 teeth/groups) according to the adhesive system placed under the tested sealant (Delton FS+; Dentsply)...
November 30, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27896417/age-assessment-based-on-third-molar-mineralisation-an-epidemiological-radiological-study-on-a-central-european-population
#6
Elisabeth Hofmann, Matthias Robold, Peter Proff, Christian Kirschneck
PURPOSE: The method published in 1973 by Demirjian et al. to assess age based on the mineralisation stage of permanent teeth is standard practice in forensic and orthodontic diagnostics. From age 14 onwards, however, this method is only applicable to third molars. No current epidemiological data on third molar mineralisation are available for Caucasian Central-Europeans. Thus, a method for assessing age in this population based on third molar mineralisation is presented, taking into account possible topographic and gender-specific differences...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896214/a-case-of-severe-mandibular-retrognathism-with-bilateral-condylar-deformities-treated-with-le-fort-i-osteotomy-and-two-advancement-genioplasty-procedures
#7
Masahiro Nakamura, Takeshi Yanagita, Tatsushi Matsumura, Takashi Yamashiro, Seiji Iida, Hiroshi Kamioka
We report a case involving a young female patient with severe mandibular retrognathism accompanied by mandibular condylar deformity that was effectively treated with Le Fort I osteotomy and two genioplasty procedures. At 9 years and 9 months of age, she was diagnosed with Angle Class III malocclusion, a skeletal Class II jaw relationship, an anterior crossbite, congenital absence of some teeth, and a left-sided cleft lip and palate. Although the anterior crossbite and narrow maxillary arch were corrected by interceptive orthodontic treatment, severe mandibular hypogrowth resulted in unexpectedly severe mandibular retrognathism after growth completion...
November 2016: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/27895350/age-estimation-of-a-sample-of-pakistani-population-using-coronal-pulp-cavity-index-in-molars-and-premolars-on-orthopantomogram
#8
Sheikh Bilal Badar, Robia Ghafoor, Farhan Raza Khan, Muhammad Hasan Hameed
The aim of the present study was to assess the validity of tooth-coronal index (TCI) in the age estimation. This retrospective charts review was conducted at the Aga Khan University Hospital, Karachi from January 2016 to March 2016, and comprised 315 teeth of 80 individuals. The teeth were analysed on Orthopantomogram. TCI was calculated for unrestored mandibular premolars and molars. Pearson\\\'s correlation was applied to assess correlation between chronological age and TCI. Besides, 30(37.5%) subjects were male and 50(62...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27895347/comparison-of-fracture-and-deformation-in-the-rotary-endodontic-instruments-protaper-versus-k-3-system
#9
Sana Ehsen Nagi, Farhan Raza Khan, Munawar Rahman
This experimental study was done on extracted human teeth to compare the fracture and deformation of the two rotary endodontic files system namely K-3 and Protapers. It was conducted at the dental clinics of the Aga Khan University Hospital, Karachi, A log of file deformation or fracture during root canal preparation was kept. The location of fracture was noted along with the identity of the canal in which fracture took place. The fracture in the two rotary systems was compared. SPSS 20 was used for data analysis...
March 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27894525/canine-lateral-incisor-transposition-controlling-root-resorption-with-a-bone-anchored-t-loop-retraction
#10
Yu Lin Hsu, Chris H Chang, W Eugene Roberts
A 12-year-old girl presented with a Class II Division 1 malocclusion, complicated by a complete transposition of the maxillary left canine into the position normally occupied by the left lateral incisor. Dental and medical histories were noncontributory. Brackets were bonded on all maxillary teeth, from first molar to first molar, except for the left lateral incisor. Because the lateral incisor was not engaged on the archwire, the tooth was free to physiologically move out of the path of canine root movement...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27892836/comparison-of-internal-adaptation-in-class-ii-bulk-fill-composite-restorations-using-micro-ct
#11
S H Han, S H Park
PURPOSE: This study compared the internal adaptation of bulk-fill composite restorations in class II cavities and explored the relationship between internal adaptation and polymerization shrinkage or stress. METHODS AND MATERIALS: Standardized mesio-occluso-distal cavities were prepared in 40 extracted human third molars and randomly divided into five groups (n=8). After having been applied by total-etch XP bond (Dentsply Caulk, Milford, DE, USA) and light curing, the teeth were restored with the following resin composites: group 1, Filtek Z350 (3M ESPE, St...
November 28, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27891629/capping-carious-exposures-in-adults-a-randomized-controlled-trial-investigating-mineral-trioxide-aggregate-versus-calcium-hydroxide
#12
R Kundzina, L Stangvaltaite, H M Eriksen, E Kerosuo
AIM: The aim of this multicentre, parallel-group randomized clinical trial was to compare the effectiveness of mineral trioxide aggregate (MTA) and a conventional calcium hydroxide liner (CH) as direct pulp capping materials in adult molars with carious pulpal exposure. METHODOLOGY: Seventy adults aged 18-55 years were randomly allocated to two parallel arms: MTA (White ProRoot, Dentsply, Tulsa Dental, Tulsa, OK, USA; n = 33) and CH (Dycal(®) , Dentsply DeTrey GmbH, Konstanz, Germany; n = 37)...
November 7, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27891453/efficacy-of-ketamine-as-an-adjunct-to-local-anesthesia-in-the-surgical-removal-of-impacted-mandibular-third-molars-a-split-mouth-prospective-controlled-clinical-study
#13
Anand Shah, Rajshekhar Halli, Yash Merchant, Rajesh Kshirsagar, Jyotsana Khurana
INTRODUCTION: The removal of impacted teeth is one of the most common procedures performed by oral and maxillofacial surgeons. Reduction of discomfort post-operatively and efficient local anesthesia are imperative for success in surgical practice. At sub-anesthetic doses, ketamine has a noticeable analgesic action, which can be used to supplement local anesthesia with minimal side effects. AIM: To assess the efficacy of low-dose ketamine as an adjunct to local anesthesia in the management of pain, swelling and trismus after surgical removal of impacted mandibular third molars...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891277/a-case-of-ameloblastic-fibroodontoma-extending-maxillary-sinus-with-erupted-tooth-is-transcanine-approach-with-alveolectomy-feasible
#14
Mustafa Aslıer, Mustafa Cenk Ecevit, Sülen Sarıoğlu, Semih Sütay
Ameloblastic fibroodontoma (AFO) is a rare entity of mixed odontogenic tumors and frequently arises from posterior portion of the maxilla or mandible in first two decades of life. Herein, a 35-year-old woman with a noncontributory medical history who presented with a progressive left maxillary toothache, left maxillary first molar tooth mobility, and swelling in the left maxillary molar area for the last 2 months was reported. Radiologically, a tumor that originated from periapical area of the second mature molar teeth of maxilla was seen and additively unerupted tooth was not detected...
2016: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/27890355/the-effects-of-cavity-margin-angles-and-bolus-stiffness-on-the-mechanical-behavior-of-indirect-resin-composite-class-ii-restorations
#15
Pietro Ausiello, Stefano Ciaramella, Franklin Garcia-Godoy, Antonio Gloria, Antonio Lanzotti, Saverio Maietta, Massimo Martorelli
OBJECTIVE: To study the influence of the different class II mesio-occlusal-distal (MOD) cavity shape on the stress and strain distributions in adhesive indirect restorations, using numerical finite element analysis (FEA). To investigate the relationship between restored teeth failure and stiffness of food, three values of Young's modulus were used for the food. METHODS: A 3D model of a sound lower molar and three class II MOD cavities with different shape were created...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27890318/the-mandibular-molar-pit-tubercle-mmpt-dental-nonmetric-trait-comprehensive-analysis-of-a-large-sample
#16
Luís Miguel Marado, Ana Maria Silva
Dental nonmetric traits are quasicontinous variables, mostly of genetic origin. Thus, sets of such traits allow biological distance estimation between samples. Mandibular molar pit-tubercle (MMPT) is a buccal trait defined by Weets (2009) in Irish samples. This study aims to analyze (a) trait frequencies, (b) grade definitions, (c) intraobserver error, (d) sexual dimorphism, (e) asymmetry, and (f) trait associations for MMPT in a Portuguese sample. The first (LM1), second (LM2) and third (LM3) lower molars of 600 identified individuals from the Coimbra collections were scored for MMPT in three scoring sessions...
September 20, 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27885743/influence-of-polymerisation-method-and-type-of-fibre-on-fracture-strength-of-endodontically-treated-teeth
#17
Neslihan Tekçe, Kansad Pala, Safa Tuncer, Mustafa Demirci, Merve Efe Serim
The aim of this study was to investigate (i) the effect of direct or indirect polymerisation of adhesive-impregnated ribbon fibre under 4-mm bulk-filled composites on fracture strength; (ii) to compare polyethylene ribbon fibre-reinforcement composites with short fibre-reinforced composite; and (iii) the effectiveness of polyethylene ribbon fibre according to the restorative materials used (low-viscous bulk-fill composite, high-viscous flowable composite or conventional paste composite). Seventy molars were divided into seven groups; (groups 1-2) Ribbond-reinforced Surefil-SDR; (group 3) Ribbond-reinforced G Aenial Flo; (group 4) Ribbond-reinforced G Aenial Posterior; (group 5) short fibre-reinforced composite everX Posterior; (group 6) unfilled cavity; (group 7) intact teeth...
November 25, 2016: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/27885586/an-in-vitro-comparison-of-three-delivery-techniques-for-obturation-of-root-canals-in-primary-molars
#18
T Walia, A H Ghanbari, S Mathew, A H Ziadlou
AIM: This in vitro study evaluated the efficacy of three different obturation techniques with regards to quality of two filling pastes-Ca(OH)2/iodoform syringe paste and zinc oxide eugenol paste in primary molars. METHODS: Root canals of 45 extracted primary molars were prepared and randomly divided into three groups of 15 teeth each. Group A-canals were filled with Ca(OH)2/iodoform syringe paste, Group B-zinc oxide eugenol paste with handheld lentulo spiral and Group C-zinc oxide eugenol paste with rotary lentulo spiral...
November 24, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27883981/staging-of-third-molar-development-in-relation-to-chronological-age-of-5-16-year-old-indian-children
#19
Sapna Hegde, Akash Patodia, Uma Dixit
BACKGROUND: The usefulness of the developmental status of the third molar has been studied in assessment of the chronological age of adolescents in whom the development of the other permanent teeth is nearly complete. However, little is known about the timing and pattern of third-molar development in the Indian population. AIM: This study aimed to stage the third molar development in relation to chronological age of 5-16year old Indian children. DESIGN: In this cross-sectional observational study, the status of third molar development in relation to chronological age of 1139 Indian children aged 5-16 years was evaluated radiographically, using Orhan's modification of Demirjian's method...
November 13, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27883212/a-retrospective-study-on-periodontal-disease-progression-in-private-practice
#20
Luigi Nibali, Chuanming Sun, Aliye Akcalı, Xsuan Meng, Yu-Kang Tu, Nikos Donos
BACKGROUND: Only a handful of studies have assessed tooth loss risk in chronic periodontitis patients following active therapy and factors associated with it. AIMS: The aim of this retrospective study was to assess tooth loss in a cohort of chronic periodontitis patients undergoing maintenance care in a UK private practice setting. MATERIALS AND METHODS: One hundred chronic periodontitis patients treated with active periodontal therapy (APT) were followed up in supportive periodontal therapy (SPT) for at least 5 years...
November 24, 2016: Journal of Clinical Periodontology
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