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https://www.readbyqxmd.com/read/29043715/quantitative-light-induced-fluorescence-technology-for-quantitative-evaluation-of-tooth-wear
#1
Sang-Kyeom Kim, Hyung-Suk Lee, Seok-Woo Park, Eun-Song Lee, Elbert de Josselin de Jong, Hoi-In Jung, Baek-Il Kim
Various technologies used to objectively determine enamel thickness or dentin exposure have been suggested. However, most methods have clinical limitations. This study was conducted to confirm the potential of quantitative light-induced fluorescence (QLF) using autofluorescence intensity of occlusal surfaces of worn teeth according to enamel grinding depth in vitro. Sixteen permanent premolars were used. Each tooth was gradationally ground down at the occlusal surface in the apical direction. QLF-digital and swept-source optical coherence tomography images were acquired at each grinding depth (in steps of 100  μm)...
October 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29043507/extraction-of-mandibular-premolars-and-molars-comparison-between-local-infiltration-via-pressure-syringe-and-inferior-alveolar-nerve-block-anesthesia
#2
Daniel G E Thiem, Florian Schnaith, Caroline M E Van Aken, Anne Köntges, Vinay V Kumar, Bilal Al-Nawas, Peer W Kämmerer
OBJECTIVES: The purpose of this study was to evaluate the anesthetic efficiency of local infiltration anesthesia administered with a pressure syringe (P-INF) via a special technique versus direct block anesthesia of the inferior alveolar nerve (IANB) for tooth extraction in the posterior mandible. MATERIALS AND METHODS: In a prospective randomized study, 101 teeth in 101 patients were extracted in the posterior mandible under local anesthesia whereby two different administration techniques were used (P-INF n = 48; IANB n = 53)...
October 17, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29042735/effectiveness-of-three-different-irrigants-17-ethylenediaminetetraacetic-acid-q-mix-and-phytic-acid-in-smear-layer-removal-a-comparative-scanning-electron-microscope-study
#3
Janhavi Balasaheb Jagzap, Sanjay S Patil, Vandana Jaykumar Gade, Deepika J Chandhok, Madhura A Upagade, Deepa A Thakur
BACKGROUND: Removal of smear layer from the root canal walls is important for long-standing endodontic success. AIM: The aim of this study is to evaluate and compare smear layer removing ability among 17% ethylenediaminetetraacetic acid (EDTA), Q-MIX, and phytic acid by scanning electron microscopy (SEM). MATERIALS AND METHODS: This in-vitro experimental study assessed smear layer removal using three different irrigants. Thirty single-rooted freshly extracted human permanent premolars were collected, disinfected, and decoronated to a standardized root length of 13 mm...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042723/effect-of-different-irrigating-solutions-on-depth-of-penetration-of-sealer-into-dentinal-tubules-a-confocal-microscopic-study
#4
Murali Mohan Thota, Kakollu Sudha, D L Malini, Singiri Bindhu Madhavi
AIM: The aim of the study was to evaluate the effect of different irrigating solutions used in final irrigation on depth of sealer penetration into dentinal tubules. MATERIALS AND METHODS: Thirty recently extracted, human mandibular premolar teeth with single canals were randomly divided into two groups, and one of the two irrigants was used in each group - Group A (Chitosan) and Group B (Ethylenediaminetetraacetic acid). All the teeth were obturated with gutta-percha and AH 26(®) sealer labeled with fluorescent dye...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29037463/in-vivo-bone-strain-and-finite-element-modeling-of-a-rhesus-macaque-mandible-during-mastication
#5
Olga Panagiotopoulou, José Iriarte-Diaz, Simon Wilshin, Paul C Dechow, Andrea B Taylor, Hyab Mehari Abraha, Sharifah F Aljunid, Callum F Ross
Finite element analysis (FEA) is a commonly used tool in musculoskeletal biomechanics and vertebrate paleontology. The accuracy and precision of finite element models (FEMs) are reliant on accurate data on bone geometry, muscle forces, boundary conditions and tissue material properties. Simplified modeling assumptions, due to lack of in vivo experimental data on material properties and muscle activation patterns, may introduce analytical errors in analyses where quantitative accuracy is critical for obtaining rigorous results...
September 1, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/29034597/effect-of-composite-type-and-placement-technique-on-cuspal-strain
#6
Vilhelm G Ólafsson, André V Ritter, Edward J Swift, Lee W Boushell, Ching-Chang Ko, Gabrielle R Jackson, Sumitha N Ahmed, Terence E Donovan
OBJECTIVE: To compare the cuspal strain in Class II restorations made with bulk-fill and conventional composite resins. MATERIALS AND METHODS: Fifty extracted maxillary premolars were mounted into phenolic rings and divided into five groups (n = 10). Specimens received standardized MOD preparations. A two-step self-etch adhesive was applied and the preparations were restored using a custom matrix as follows: Filtek Supreme Ultra in eight 2-mm increments (FSUI); Filtek Supreme Ultra in bulk (FSUB); SonicFill in bulk (SF); SureFil SDR flow in bulk, covered with a 2-mm occlusal layer of Filtek Supreme Ultra (SDR/FSU); Tetric EvoCeram Bulk Fill in bulk (TEBF)...
October 16, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29034420/prevalence-of-dental-agenesis-in-a-sample-of-italian-orthodontic-patients-an-epidemiological-study
#7
Antonio L T Gracco, Serena Zanatta, Filippo Forin Valvecchi, Denis Bignotti, Alessandro Perri, Francesco Baciliero
BACKGROUND: The congenital absence of one or more teeth is a dental anomaly that frequently occurs in the world's population with a wide variability of distribution. The aim of this study is to assess the current prevalence of dental agenesis in the permanent dentition (excluding third molars) using a sample of Italian orthodontic patients. METHODS: Panoramic radiographs of 4006 Caucasian children between 9 and 16 years of age (1865 males and 2141 females) performed over a 5-year period (from 2010 to 2015) were carefully examined to identify congenital missing teeth...
October 16, 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/29034275/diagnosis-of-approximal-caries-after-delayed-scanning-of-photostimulable-phosphor-plates
#8
Zahra Ghoncheh, Yasaman Kheirandish, Hanieh Kaviani, Mohammad Javad Kharazi Fard, Kurosh Sadeghi
STATEMENT OF THE PROBLEM: Considering the high diagnostic accuracy and wide dynamic range of photostimulable phosphor plates (PSPs), they can be a good alternative for radiographic films. PURPOSE: This study was aimed to assess the effects of delay in scanning PSPs on the diagnostic accuracy of detection of approximal caries. MATERIALS AND METHOD: Radiographs from fifty-two extracted molar and premolar teeth were radiographed using DIGORA PSP (Soredex Corporation, Helsinki, Finland)...
September 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29033530/orthodontic-management-of-a-dilacerated-central-incisor-and-partially-impacted-canine-with-unilateral-extraction-a-case-report
#9
A Sumathi Felicita
AIM: To align a dilacerated maxillary central incisor and partially impacted canine with unilateral extraction in a young patient with skeletal deep bite. MATERIALS AND METHODS: A 14 year old male patient reported to the hospital with skeletal deep bite (basal plane angle-17°), severe horizontal pattern of growth (Go-Gn to Sn -22°), upright maxillary incisors (U1 to NA -26°) and retroclined lower incisors (L1 to NB -11°). The maxillary left central incisor was dilacerated, and the maxillary left canine was partially impacted...
October 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/29032818/radiographic-histologic-and-biomechanical-evaluation-of-combined-application-of%C3%A2-platelet-rich-fibrin-with-blood-clot-in%C3%A2-regenerative-endodontics
#10
Ronghui Zhou, Yumin Wang, Yuemin Chen, Shuai Chen, Hongbing Lyu, Zhiyu Cai, Xiaojing Huang
INTRODUCTION: No in vivo study has been reported on the mechanical reinforcement of a tooth after regenerative endodontic treatment (RET). The present work aimed to evaluate the concurrent use of platelet-rich fibrin (PRF) with a blood clot (BC) in RET concerning periapical healing, root development, and tooth structural reinforcement. METHODS: In our study, 24 premolars from 3 beagle dogs were assigned into control, BC, and PRF + BC groups. Periapical healing was monitored with quantitative measurements of root elongation and thickening radiographically...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032227/effectiveness-of-photodynamic-therapy-associated-with-irrigants-over-two-biofilm-models
#11
Ricardo Abreu da Rosa, Manuela Favarin Santini, José Antônio Poli de Figueiredo, Fernanda Visioli, Jefferson Ricardo Pereira, Rodrigo Ricci Vivan, Francisco Montagner, Marcus Vinícius Reis Só
BACKGROUND: This study aimed to evaluate the antibacterial effect and the biofilm disruption promoted by antimicrobial photodynamic therapy (aPDT) associated with sodium hypochlorite (NaOCl) and chlorexidine (CHX) over monospecies and multispecies biofilms. METHODS: In monospecies model, forty-six premolars were inoculated with Enterococcus faecalis for 21days and divided into three groups: saline, CHX and NaOCl. After irrigation, aPDT was performed. Samples were collected at baseline (S1) and after irrigation (S2) and aPDT (S3)...
October 12, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29031820/suidae-from-kanapoi
#12
Denis Geraads, René Bobe
The whole collection of Suidae from Kanapoi is revised in the context of the systematics and evolution of Nyanzachoerus in the Pliocene of Eastern Africa. It contains only two species, Nyanzachoerus kanamensis and Notochoerus jaegeri. The size and morphology of their premolars overlap, but not those of their m3s. No transitional form between them is known in Kenya, but some populations from Uganda and Ethiopia display intermediate characters, suggesting that No. jaegeri could be descended from a kanamensis-like ancestor...
October 11, 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29027749/permanent-tooth-agenesis-in-individuals-with-non-syndromic-robin-sequence-a-systematic-review-and-meta-analysis
#13
G S Antonarakis, P K Palaska, S Suri
OBJECTIVES: To evaluate prevalence rates and patterns of permanent tooth agenesis in individuals with non-syndromic Robin sequence (ns-RS). MATERIAL AND METHODS: Two investigators independently carried out a literature search, using PubMed, Web of Science, Ovid, EMBASE and the Cochrane Library, identifying articles relating to permanent tooth agenesis, diagnosed using panoramic radiographs, in individuals with ns-RS. The outcomes desired were prevalence rates and patterns of permanent tooth agenesis...
October 13, 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/29026702/apical-extrusion-of-intracanal-bacteria-with-single-file-and-multifile-rotary-instrumentation-systems
#14
Eshaghali Saberi, Shahram Shahraki Zahedani, Sediqe Ebrahimipour
AIMS AND OBJECTIVES: Instrumentation techniques may cause extrusion of microorganisms and their products into the periapical region resulting inflammation and treatment failure. The aim of this ex vivo study was comparing the apical bacterial extrusion in canals prepared with single file versus multiple file rotary systems. MATERIALS AND METHODS: Ninety-two human single-rooted mandibular first premolars were used. Endodontic access cavities were prepared, and root canals were contaminated with an Enterococcus faecalis (E...
September 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29023609/thickness-of-the-buccal-plate-in-posterior-teeth-a-prospective-cone-beam-computed-tomography-study
#15
Kayleigh Eaves Temple, John Schoolfield, Marcel E Noujeim, Guy Huynh-Ba, David J Lasho, Brian L Mealey
Buccal plate thickness is an important clinical parameter for postextraction implant treatment planning. The purpose of this study was to assess buccal plate thickness of the posterior maxilla and mandible using cone beam computed tomography (CBCT). A total of 265 patients and 934 teeth met the inclusion criteria for this study. CBCT volumes were taken and aligned for measurement at the ideal midsagittal cross-section. Buccal plate thickness was measured at 1, 3, and 5 mm apical to the alveolar crest. The frequency of thick (≥ 1 mm), thin (< 1 mm), and radiographic absence of the buccal plate were determined...
November 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29022137/effect-of-different-endodontic-sealers-and-time-of-cementation-on-push-out-bond-strength-of-fiber-posts
#16
Danielle Araújo Vilas-Boas, Renata Grazziotin-Soares, Diego Machado Ardenghi, José Bauer, Patrícia Oliveira de Souza, George Táccio de Miranda Candeiro, Etevaldo Matos Maia-Filho, Ceci Nunes Carvalho
OBJECTIVES: This study aims to evaluate the effect of different endodontic sealers (epoxy resin, eugenol, and bioceramic/calcium silicate-based) and the time of cementation (immediately or 7 days after canal obturation) on the bond strength of a fiberglass post cemented with RelyX™ ARC. MATERIAL AND METHODS: Eighty-four premolars were instrumented and divided into groups (n = 12) according to the sealer and the time of post cementation: Endofill (EN), Endosequence BC Sealer (BC), and AH Plus (AH) had immediately fiber post cementation; EN7, BC7, and AH7 had post cementation after 7 days; and control group (C) had fiber post cementation without endodontic sealer...
October 11, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29020030/the-first-hyaenodont-from-the-late-oligocene-nsungwe-formation-of-tanzania-paleoecological-insights-into-the-paleogene-neogene-carnivore-transition
#17
Matthew R Borths, Nancy J Stevens
Throughout the Paleogene, most terrestrial carnivore niches in Afro-Arabia were occupied by Hyaenodonta, an extinct lineage of placental mammals. By the end of the Miocene, terrestrial carnivore niches had shifted to members of Carnivora, a clade with Eurasian origins. The transition from a hyaenodont-carnivore fauna to a carnivoran-carnivore fauna coincides with other ecological changes in Afro-Arabia as tectonic conditions in the African Rift System altered climatic conditions and facilitated faunal exchange with Eurasia...
2017: PloS One
https://www.readbyqxmd.com/read/29019277/3d-cbct-morphometric-assessment-of-mental-foramen-in-arabic-population-and-global-comparison-imperative-for-invasive-and-non-invasive-procedures-in-mandible
#18
Mohammad Khursheed Alam, Selham Alhabib, Bader K Alzarea, Muhammad Irshad, Saif Faruqi, Mohd G Sghaireen, Santosh Patil, Rehana Basri
BACKGROUND: Recent advancements in clinical dentistry have increased the possibilities of surgical procedures in the mental region. A detailed knowledge of mental foramen (MF) morphometry is significant to preserve integrity of the mental nerve trunk in surgical interventions such as orthognathic surgery, implant placement and anaesthetic block. OBJECTIVE: The aim of this study was to determine the most accurate position of the mental foramen by using new assessment approach in a sample of dental patients presenting to the specialist dental clinic, College of Dentistry, Al Jouf University, Saudi Arabia...
October 11, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29016746/effects-of-low-magnitude-high-frequency-mechanical-vibration-combined-with-compressive-force-on-human-periodontal-ligament-cells-in-vitro
#19
Sutiwa Benjakul, Suwanna Jitpukdeebodintra, Chidchanok Leethanakul
Objective: Vibration can be used to accelerate tooth movement, though the exact mechanisms remain unclear. This study aimed to investigate the effects of low magnitude high frequency (LMHF) vibration combined with compressive force on periodontal ligament (PDL) cells in vitro. Materials and methods: Human PDL cells were isolated from extracted premolar teeth of four individuals. To determine the optimal frequency for later used in combination with compressive force, three cycles of low-magnitude (0...
September 7, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29016741/the-effect-of-low-level-laser-therapy-on-orthodontically-induced-root-resorption-a-pilot-double-blind-randomized-controlled-trial
#20
Doreen Ng, Ambrose K Chan, Alexandra K Papadopoulou, Oyku Dalci, Peter Petocz, Mehmet Ali Darendeliler
Background: The effect of low-level laser therapy (LLLT) on accelerating orthodontic tooth movement has been extensively studied; however, there is limited knowledge on the use of LLLT on orthodontic root resorption. Objective: To investigate the effect of LLLT on orthodontically induced inflammatory root resorption (OIIRR) and to compare the difference between pulsed and continuous LLLT on OIIRR. Trial design: Double-blind, single-centre 3-arm parallel split-mouth randomized controlled trial...
September 7, 2017: European Journal of Orthodontics
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