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https://www.readbyqxmd.com/read/28523243/maxillomandibular-arch-width-differences-at-estimated-centers-of-resistance-comparison-between-normal-occlusion-and-skeletal-class-iii-malocclusion
#1
Yun-Jin Koo, Sung-Hwan Choi, Byeong-Tak Keum, Hyung-Seog Yu, Chung-Ju Hwang, Birte Melsen, Kee-Joon Lee
OBJECTIVE: To evaluate the differences in maxillomandibular transverse measurements at either the crown or the estimated center of resistance (CR), and to compare values between normal occlusion and Class III malocclusion groups. METHODS: Dental casts and computed tomography (CT) data from 30 individuals with normal occlusion and 30 with skeletal Class III malocclusions were evaluated. Using the casts, dental arch widths (DAWs) were measured from the cusp tips, and basal arch widths (BAWs-cast) were measured as the distance between the points at the mucogingival junction adjacent to the respective cusp tips...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28523242/effects-of-bracket-slot-size-during-en-masse-retraction-of-the-six-maxillary-anterior-teeth-using-an-induction-heating-typodont-simulation-system
#2
Ji-Yong Kim, Won-Jae Yu, Prasad N K Koteswaracc, Hee-Moon Kyung
OBJECTIVE: To investigate how bracket slot size affects the direction of maxillary anterior tooth movement when en-masse retraction is performed in sliding mechanics using an induction-heating typodont simulation system. METHODS: An induction-heating typodont simulation system was designed based on the Calorific Machine system. The typodont included metal anterior and resin posterior teeth embedded in a sticky wax arch. Three bracket slot groups (0.018, 0.020, and 0...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28521914/the-face-of-conflict-significant-sharp-force-trauma-to-the-mid-facial-skeleton-in-an-individual-of-probable-16th-17th-century-date-excavated-from-byczyna-poland
#3
Agata Izabela Cieślik, Paweł Dąbrowski, Magdalena Anita Przysiężna-Pizarska
A variety of injuries have always been associated with violence, consequences of which people had to deal with. In this paper we present a complex of craniofacial and dental injuries resulted from sharp force trauma. The basis of our study was historical skeletal material excavated from archeological site in Byczyna (11th-17th century), Poland. An individual whose skeleton was exhumed from the grave No. 610 exhibited healed, oblique trauma of the left maxilla, damage to the crowns of right central and lateral incisors and concomitant luxation of the right maxillary central incisor...
June 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28518187/in-vitro-shock-absorption-tests-on-implant-supported-crowns-influence-of-crown-materials-and-luting-agents
#4
Martin Rosentritt, Sibylle Schneider-Feyrer, Michael Behr, Verena Preis
PURPOSE: To investigate the force absorption capacity of implant-supported crowns made of different restorative materials and connected to abutments with different luting agents. MATERIALS AND METHODS: Molar crowns were milled of different computer-aided design/computer-aided manufacture materials (n = 8 crowns per material): polymethyl methacrylate, polyether ether ketone, composite, lithium disilicate, titanium, and zirconia. Crowns were mounted on titanium implant replicas using different luting agents: uncemented, temporarily cemented (zinc oxide-eugenol cement), conventionally cemented (zinc oxide phosphate cement), and adhesively bonded...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518183/preclinical-evaluation-of-a-crown-splinted-custom-root-shaped-implant
#5
Elias D Kontogiorgos, Poorva Gharpure, Eberechukwu O Iheanacho, Christopher J Gonzales, Lynne A Opperman
OBJECTIVE: To test whether a Maryland bridge-type splint provides adequate stability for a custom root-shaped implant to osseointegrate in a manner substantially equivalent to that of a threaded implant. METHODS: Six beagle dogs were subjected to intraoral impressions and cone beam scans that were used to fabricate custom root-shaped implants (RTIs) and crowns. Premolars in the mandible (P4) and in the maxilla (P3) were extracted, and 24 RTIs were immediately placed in extraction sockets...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518181/a-semi-automatic-algorithm-for-preliminary-assessment-of-labial-gingiva-and-alveolar-bone-thickness-of-maxillary-anterior-teeth
#6
Sheng-Hung Chen, Hsun-Liang Chan, Yongning Lu, Sim-Heng Ong, Hom-Lay Wang, Eng Hong Ko, Po-Chun Chang
PURPOSE: Soft and hard tissue volumes are critical for implant placement and long-term stability. Although the literature has adequately addressed tissue biotypes of Western populations, pertinent information about Asian populations is limited. This study aimed to evaluate the soft and hard tissue profiles of the maxillary anterior teeth of the Taiwanese population using a semi-automatic algorithm. MATERIALS AND METHODS: Cone beam computed tomography images of 11 adults with well-aligned maxillary anterior teeth were overlaid with those of cast models, based on the tooth crowns manually outlined by two independent observers...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28517973/periodontal-referral-patterns-in-australia-2000-versus-2015
#7
Leah M Brown, Patrick Bowman, Vincent J O'Rourke, Faustino Mercado, Roderick Marshall, Scott Parsons
BACKGROUND: A previous study had investigated differences in the severity of periodontal disease on referral for specialist care between 1980 and 2000 across the USA. This study found patients referred in 2000 had a greater severity of periodontal disease than those referred twenty years prior. METHODS: A retrospective chart analysis of 384 charts was completed from three periodontal practices across the east coast of Australia. Two time periods were investigated; 2000-2001 and 2015-2016...
May 18, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28515694/fam20a-gene-mutation-amelogenesis-or-ectopic-mineralization
#8
Guilhem Lignon, Fleur Beres, Mickael Quentric, Stephan Rouzière, Raphael Weil, Muriel De La Dure-Molla, Adrien Naveau, Renata Kozyraki, Arnaud Dessombz, Ariane Berdal
Background and objective:FAM20A gene mutations result in enamel renal syndrome (ERS) associated with amelogenesis imperfecta (AI), nephrocalcinosis, gingival fibromatosis, and impaired tooth eruption. FAM20A would control the phosphorylation of enamel peptides and thus enamel mineralization. Here, we characterized the structure and chemical composition of unerupted tooth enamel from ERS patients and healthy subjects. Methods: Tooth sections were analyzed by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28514830/association-of-maternal-serum-papp-a-levels-nuchal-translucency-and-crown-rump-length-in-first-trimester-with-adverse-pregnancy-outcomes-retrospective-cohort-study
#9
Ashwini Bilagi, Danielle L Burke, Richard D Riley, Ian Mills, Mark D Kilby, R Katie Morris
OBJECTIVE: Are first trimester serum pregnancy-associated plasma protein-A (PAPP-A), nuchal translucency (NT) and crown rump length (CRL) prognostic factors for adverse pregnancy outcomes? METHOD: Retrospective cohort women, singleton pregnancies (UK 2011-2015). Unadjusted and multivariable logistic regression, outcomes: small for gestational age (SGA), pre-eclampsia (PE), pre-term birth (PTB), miscarriage, stillbirth, perinatal mortality and neonatal death (NND)...
May 17, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28514349/-elastic-properties-and-porosity-of-dental-blocks-made-from-non-metal-materials-used-for-chairside-cad-cam-crowns
#10
K E Goryainova, E S Morokov, M V Retinskaya, I J Lebedenko
Elastic properties and internal structure of glass-ceramic, feldspatic ceramic, PMMA and hybrid blocks for chairside CAD/CAM dental crowns were assessed by pulsed acoustic microscopy. Elastic modulus of hybrid ceramic was 1.5 times inferior to feldspatic ceramic and glass-ceramic but almost 10 times higher than those of polymer samples. We found the presence of pores from a few to hundreds of microns in the bulk of inorganic materials samples, isolated point defects were revealed in polymer materials while in hybrid material defects were not found...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28514157/polymersomes-with-rapid-k-triggered-drug-release-behaviors
#11
Xiang-Ru You, Xiao-Jie Ju, Fan He, Yuan Wang, Zhuang Liu, Wei Wang, Rui Xie, Liang-Yin Chu
A novel type of smart polymersomes with rapid K+-triggered drug release property is developed in this work. Block copolymers with biocompatible poly(ethylene glycol) (PEG) as the hydrophilic block and poly(N-isopropylacrylamide-co-benzo-18-crown-6-acrylamide) (PNB) copolymer as the K+-responsive block are successfully synthesized. Due to the presence of 18-crown-6 units, the PEG-b-PNB block copolymers exhibit excellent K+-dependent phase transition behaviors, which show hydrophilic-hydrophobic state in simulated extracellular fluid and present hydrophilic-hydrophilic state in simulated intracellular fluid...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28514042/effect-of-crystallization-firing-on-marginal-gap-of-cad-cam-fabricated-lithium-disilicate-crowns
#12
Steven A Gold, Jack L Ferracane, Juliana da Costa
PURPOSE: To evaluate the marginal gaps of CAD/CAM (CEREC 3) produced crowns made from leucite-reinforced glass-ceramic (IPS Empress CAD) blocks (LG), and lithium-disilicate (IPS e.max CAD) blocks before (LD-B), and after (LD-A) crystallization firing. MATERIALS AND METHODS: A human molar tooth (#19) was mounted with adjacent teeth on a typodont and prepared for a full-coverage ceramic crown. The typodont was assembled in the mannequin head to simulate clinical conditions...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28513387/-i-wanted-to-be-a-blue-peter-presenter
#13
(no author information available yet)
Ruth Butler qualified as a registered general nurse and registered sick children's nurse in the 1980s, working at London's Great Ormond Street Hospital for Children NHS Trust. Last year, she was crowned winner of the child health award at the RCNi Nurse Awards, and has been in her current role as research associate at Central London Community Healthcare NHS Trust since October 2016.
May 17, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28512544/oral-health-related-quality-of-life-outcomes-of-partially-edentulous-patients-treated-with-implant-supported-single-crowns-or-fixed-partial-dentures
#14
Bader K AlZarea
BACKGROUND: Oral health-related quality of life (OHRQoL) is afflicted by different variables. Limited information is available regarding the impact of different phases of implant therapy on OHRQoL of edentulous patients. This study was carried out to assess the OHRQoL of patients treated with implant-supported single crowns or fixed partial dentures. MATERIAL AND METHODS: A total of 79 healthy partially edentulous subjects needing implant therapy were incorporated in this study...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28512537/decreased-dentin-tubules-density-and-reduced-thickness-of-peritubular-dentin-in-hyperbilirubinemia-related-green-teeth
#15
Rodrigo Neves-Silva, Fabio-Abreu Alves, Alberto Antunes, Mario-Fernando Goes, Marcelo Giannini, Maria-Dânia Tenório, José-Lécio Machado, Adriana-Franco Paes-Leme, Marcio-Ajudarte Lopes, Alan-Roger Santos-Silva
BACKGROUND: It is stated anecdotally that patients with liver diseases in childhood who develop green teeth have increased risk for rampant caries, which may be secondary to changes in dental structure. The aim of this study was to test the hypothesis that hyperbilirubinemia affects the dentin morphology of green teeth. MATERIAL AND METHODS: Sixteen primary teeth were prepared and divided into two groups (green teeth, n = 8 and control, n = 8), which were transversely fractured across the cervical third of the dental crowns; dentin was prepared and sputter-coated with gold, and examined under a scanning electron microscope...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28512304/nearly-perfect-durable-superhydrophobic-surfaces-fabricated-by-a-simple-one-step-plasma-treatment
#16
Jeongeun Ryu, Kiwoong Kim, JooYoung Park, Bae Geun Hwang, YoungChul Ko, HyunJoo Kim, JeongSu Han, EungRyeol Seo, YongJong Park, Sang Joon Lee
Fabrication of superhydrophobic surfaces is an area of great interest because it can be applicable to various engineering fields. A simple, safe and inexpensive fabrication process is required to fabricate applicable superhydrophobic surfaces. In this study, we developed a facile fabrication method of nearly perfect superhydrophobic surfaces through plasma treatment with argon and oxygen gases. A polytetrafluoroethylene (PTFE) sheet was selected as a substrate material. We optimized the fabrication parameters to produce superhydrophobic surfaces of superior performance using the Taguchi method...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28512273/comparison-of-complications-in-removable-mandibular-acrylic-splint-and-cantilever-herbst-for-management-of-class-ii-malocclusion-a-retrospective-study
#17
R K Kanuru, Vinny Bhasin, Amit Khatri, K K Dodda, Era Singh, Shekhar Grover
INTRODUCTION: Numerous appliances are present for the management of class II malocclusion. We have conducted a study to compare the clinical complications during treatment with either a removable mandibular acrylic splint (RMS) or with a cantilever Herbst (HC) appliance for the management of class II malocclusion. MATERIALS AND METHODS: This study consisted of records of 114 patients (61 males, 53 females), who were divided into two groups. Group I received RMS and group II received HC for the treatment of class II, Division 1 malocclusion...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28512042/the-corona-dentis-description-of-an-anatomical-variant-with-technical-implications-for-anterior-odontoid-screw-placement
#18
Fernando Alonso, Joe Iwanaga, Jens R Chapman, Rod J Oskouian, R Shane Tubbs
INTRODUCTION: Type 2 odontoid fractures are the most common cervical fractures among the elderly. Neurological deficit is usually caused as a result of myelopathy due to posterior dens migration. Direct anterior screw placement provides stabilization and can preserve C1-C2 movement. The presence of a bony excrescence on the anterior superior tip of the dens may lead to placement of a screw of incorrect length. METHODS: Twenty C2 dry specimens were examined for the presence of a corona dentis, which is a bony excrescence in the coronal plane near the apex of the dens...
May 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28511528/immediate-placement-of-zirconia-implants-in-teeth-with-periapical-lesions-a-case-report
#19
Nizar A Ahmed, Caroline Annette Jacob, Preetham Prasad Nittla
This case report records the replacement of two failed endodontically treated mandibular molars with one piece zirconia implants in a patient with metal hypersensitivity. The two molars were atraumatically extracted and curetted to remove any remnants of a periapical granuloma. Immediate implant placement with primary stability was achieved using one piece WhiteSky(®) Bredent zirconia implants which were restored after four months with a zirconia crown. One year follow up revealed successful osseointegration with optimal form and function...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28511520/effect-of-trauma-to-primary-tooth-on-permanent-maxillary-incisors-a-clinical-case-report
#20
Bhawana Gupta, Sachin Gupta, Jitesh Wadhwa, Alpa Gupta
Trauma to primary tooth leads to abnormal variations in crown and root canals of permanent teeth that presents a challenge in diagnosis and clinical management to the practitioner. This article presents a detailed case report of the endodontic treatment of a three canalled maxillary central incisor and maxillary lateral incisor having single canal with open apex linked with periodontal defect. Root canals were prepared with hand files and canals were irrigated with 2.5% sodium hypochlorite solution. Calcium hydroxide was placed as an intracanal medicament...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
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