Rijen Shrestha, Kewal Krishan, Tanuj Kanchan
The Gorkha Earthquake hit the region on 25th of April 2015, at 12:58, with the epicentre approximately 80 km N-NW of Kathmandu, recording 7.8 Mw on the Richter Scale. The disaster left almost 9000 individuals dead. The search and recovery as well as the subsequent Disaster Victim Identification (DVI) operations left much to be desired. The entire DVI operations consisted of examination of 365 bodies and collection of 15 blood/hair samples and 60 bone/tooth samples. This resulted in the scientific identification of eight individuals and visual recognition of 357...
May 14, 2020: Forensic Science International
Vanessa Camila da Silva, Rafael Scaf de Molon, Renato Parsekian Martins, Fernando Salimon Ribeiro, Ana Emília Farias Pontes, Daniela Leal Zandim-Barcelos, Fábio Renato Manzolli Leite, Carlos Benatti Neto, Rosemary Adriana Chiérici Marcantonio, Joni Augusto Cirelli
OBJECTIVE: The aim of this study was to compare the periodontal tissue changes resulting from different methods of orthodontic tooth extrusion in dogs. MATERIALS AND METHODS: Notches were surgically prepared in the root surface at the bone crest level of the first premolars of mongrel dogs. After 37 days, extrusion of the first lower and upper premolars was randomly performed by 3 different methods: conventional orthodontic extrusion (OE); open flap debridement performed immediately before orthodontic extrusion (OF); and orthodontic extrusion associated with weekly fiberotomy and scaling (FS)...
May 20, 2020: Archives of Oral Biology
J Kreth, J Merritt, C S Pfeifer, S Khajotia, J L Ferracane
Dental composites are routinely placed as part of tooth restoration procedures. The integrity of the restoration is constantly challenged by the metabolic activities of the oral microbiome. This activity directly contributes to a less-than-desirable half-life for the dental composite formulations currently in use. Therefore, many new antimicrobial dental composites are being developed to counteract the microbial challenge. To ensure that these materials will resist microbiome-derived degradation, the model systems used for testing antimicrobial activities should be relevant to the in vivo environment...
June 1, 2020: Journal of Dental Research
Ji Eun Choi, Hye Yoon Seol, Jin Myoung Seok, Sung Hwa Hong, Byung-Ok Choi, Il Joon Moon
BACKGROUND AND PURPOSE: Hidden hearing loss has been reported in patients with Charcot-Marie-Tooth (CMT) disease, however, the auditory processing deficits have not been widely explored. We investigated the psychoacoustical and neurophysiological aspects of auditory processing in patients with CMT type 1A (CMT1A) and CMT type 2A (CMT2A). METHODS: Forty-three patients with CMT1A and 15 patients with CMT2A were prospectively enrolled. All CMT patients had a normal sound detection ability by using pure-tone audiometry...
June 1, 2020: European Journal of Neurology
Glenn B Pfeffer, Tyler Gonzalez, James Brodsky, John Campbell, Chris Coetzee, Stephen Conti, Greg Guyton, David N Herrmann, Kenneth Hunt, Jeffrey Johnson, William McGarvey, Michael Pinzur, Steve Raikin, Bruce Sangeorzan, Alastair Younger, Max Michalski, Tonya An, Naudereh Noori
BACKGROUND: Charcot-Marie-Tooth (CMT) disease is a hereditary motor-sensory neuropathy that is often associated with a cavovarus foot deformity. Limited evidence exists for the orthopedic management of these patients. Our goal was to develop consensus guidelines based upon the clinical experiences and practices of an expert group of foot and ankle surgeons. METHODS: Thirteen experienced, board-certified orthopedic foot and ankle surgeons and a neurologist specializing in CMT disease convened at a 1-day meeting...
June 1, 2020: Foot & Ankle International
Oscar H Del Brutto, Robertino M Mera, Bettsy Y Recalde, Andrew P Torpey, John P Hill, Laura M Generale, Leslie D Peralta, Mark J Sedler
Background: Arterial hypertension has been associated with severe tooth loss, but differential associations with individual components of blood pressure (BP) have scarcely been investigated. We assessed the independent associations between pulsatile/steady components of BP and severe tooth loss in community-dwelling adults residing in 3 rural Ecuadorian villages. Methods: Individuals aged ≥40 years living in Atahualpa, El Tambo, and Prosperidad were identified during door-to-door surveys. Data collection focused on the number of remaining teeth and measurements of pulsatile/steady components of BP...
January 2020: Journal of Primary Care & Community Health
O S Ayedun, F A Oredugba, E O Sote
BACKGROUND: Stainless steel crown (SSC) restoration is one of the restorative treatment options in the management of carious primary molars. The Hall technique is a biologic method of managing carious primary teeth by sealing in the caries with SSCs without the routine local anaesthesia and tooth preparations. The objectives of this study was to compare the treatment assessments of the conventional stainless steel crown restoration with Hall technique using subjects' discomfort during treatments and parents' treatment perception, treatment acceptability and satisfaction with the treatment...
July 2020: West African Journal of Medicine
Toshihiro Imamura, Shunsuke Uesugi, Takashi Ono
Root resorption can be caused by several factors, including contact with the cortical bone. Here we report a case involving a 21-year-old female with Angle Class II, division 1 malocclusion who exhibited significant root resorption in the maxillary right central incisor after orthodontic treatment. The patient presented with significant left-sided deviation of the maxillary incisors due to lingual dislocation of the left lateral incisor and a Class II molar relationship. Cephalometric analysis demonstrated a Class I skeletal relationship (A pointnasion-B point, 2...
May 25, 2020: Korean Journal of Orthodontics
Sasathorn Phutinart, Suttichai Krisanaprakornkit, Anupong Makeudom, Boonsiva Suzuki, Eduardo Yugo Suzuki
Objective: Preservation of the periodontal ligament (PDL) is vital to the success of tooth autotransplantation (TAT). Increased PDL volumes and facilitated tooth extraction have been observed upon orthodontic preloading. However, it is unclear whether any changes occur in the expressions of bone biomolecules in the increased PDL volumes. This study aimed to determine the expressions of runt-related transcription factor 2 (RUNX2), alkaline phosphatase (ALP), receptor activator of nuclear factor kappa-B ligand (RANKL), and osteoprotegerin (OPG) in PDL upon preloading...
May 25, 2020: Korean Journal of Orthodontics
Youngjoo Lee, Jae Hyun Park, Na-Young Chang, Mi-Young Lee, Bong Chul Kim, Hye Young Seo, Utkarsh Mangal, Jong-Moon Chae
Objective: The aim of this retrospective study was to evaluate the pre- and postsurgical bone densities at alveolar and extra-alveolar sites following twojaw orthognathic surgery. Methods: The sample consisted of 10 patients (mean age, 23.2 years; range, 18.0-27.8 years; 8 males, 2 females) who underwent two-jaw orthognathic surgery. A three-dimensional imaging program (Invivo 5) was used with multidetector computed tomography images taken preand postoperatively (obtained 32...
May 25, 2020: Korean Journal of Orthodontics
Anne-Laure Bonnet, Victor Greset, Tiphaine Davit-Beal
Alagille syndrome (AGS) is a multisystem disorder classically involving liver and heart failure, characteristic vertebral and facial features and ocular abnormalities. AGS is caused by heterozygous mutations in JAG1 or NOTCH2, with variable phenotype penetrance. We report two cases of AGS in children with tooth defects characterised by green discolouration and hypomineralisation. The role of hyperbilirubinaemia (HB) in this atypical colour, a classical feature of AGS, has been well described. However, it does not totally explain the dental phenotype...
May 31, 2020: BMJ Case Reports
Mahmoud Sayed, Noriko Hiraishi, Khairul Matin, Ahmed Abdou, Michael F Burrow, Junji Tagami
OBJECTIVE: This study investigated the effect of silver diammine fluoride (SDF), nano-silver (AgNPs) and nano-silver/potassium fluoride (AgNPs/KF) on the morphology of dentin collagen and color staining on the dentin. Also, we investigated the anti-caries properties in terms of anti-bacterial effects and potentiality of dentin remineralization at collagen level. METHODS: Dentin specimens obtained from bovine tooth roots were finished with #2000 SiC and sonicated for 5min...
May 28, 2020: Dental Materials
Raimonda Marchiulynaite-Ustiliene, Jurate Trisiniene, Neringa Skucaite, Adomas Auskalnis, Rita Veberiene, Vita Machiulskiene
STATEMENT OF PROBLEM: Whether the amount of the endodontic obturation material remnants in a root canal prepared for a post is related to variations in the anatomic shape of the canal or whether it varies in different parts of the post space is unclear. PURPOSE: The purpose of this in vitro study was to estimate the extent of root canal contamination with remnants of the obturation material after post space preparation in relation to the anatomic shape of the root canals by means of microcomputed tomography...
May 28, 2020: Journal of Prosthetic Dentistry
Regimantas Simuntis, Ričardas Kubilius, Paulius Tušas, Marijus Leketas, Justinas Vaitkus, Saulius Vaitkus
BACKGROUND: The treatment of chronic odontogenic and nonodontogenic rhinosinusitis is different. It requires the elimination of odontogenic cause and optimal sinus surgical treatment. To date, there are no clear indications when sinus surgical treatment is necessary. OBJECTIVE: Our aim was to define clear indication(s) for sinus surgical treatment in patients with chronic odontogenic rhinosinusitis after elimination of odontogenic cause. METHODS: A group of 96 patients with chronic odontogenic rhinosinusitis caused by apical periodontitis completed a Sino-Nasal Outcome Test 22 (SNOT-22) questionnaire with incorporated additional symptom "malodor" before treatment...
May 31, 2020: American Journal of Rhinology & Allergy
Pierfrancesco Pagella, Thimios A Mitsiadis
Innervation plays a key role in the development, homeostasis, and regeneration of organs and tissues. However, the mechanisms underlying these phenomena are not well understood yet. In particular, the role of innervation in tooth development and regeneration is neglected. Cocultures constitute a valuable method to investigate and manipulate the interactions between nerve fibers and teeth in a controlled and isolated environment. Microfluidic systems for allow cocultures of neurons and different cell types in their appropriate culture media, while permitting the passage of axons from one compartment to the other...
2020: Methods in Molecular Biology
Beata Dejak, Andrzej Młotkowski
OBJECTIVES: The purpose of the study was to compare the mvM stresses occurring in inlays, onlays and endocrowns made from different materials and their bonding with molars in a computer simulation of mastication. METHODS: The study was conducted using the finite elements method with contact elements. Sixteen 3D first molar models were created of a intact tooth - T; a tooth with a ceramic inlay - IN; a tooth with an onlay - ON; and a tooth with an endocrown - EN...
May 27, 2020: Dental Materials
Won-Suk Oh
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Effect of cement type on the clinical performance and complications of zirconia and lithium disilicate tooth-supported crowns: A systematic review. Report of the Committee on Research in Fixed Prosthodontics of the American Academy of Fixed Prosthodontics. Maroulakos G, Thompson GA, Kontogiorgos ED. J Prosthet Dent 2019;121:754-65. SOURCE OF FUNDING: Unknown. TYPE OF STUDY/DESIGN: Systematic review...
June 2020: Journal of Evidence-based Dental Practice
Márcia Rezende, Karine Leticia da Silva, Thais Caroline Miguel, Paulo Vitor Farago, Alessandro Dourado Loguercio, Luciana Dorochenko Martins, Alessandra Reis
OBJECTIVE: To evaluate if the topical application of 10% potassium nitrate applied before in-office bleaching is effective to reduce the risk and intensity of tooth sensitivity (TS), as well as to evaluate if its application can jeopardize color change. MATERIALS AND METHODS: A randomized, split-mouth triple-blind clinical trial was conducted on 43 young patients with incisors A2 or darker. Half of the patient's upper arch received either the application of a 10% potassium nitrate or placebo gel for 10 min in a university setting...
June 2020: Journal of Evidence-based Dental Practice
Mei-Yang Huang, KeunBaDa Son, Kyu-Bok Lee
STATEMENT OF PROBLEM: The introduction of intraoral scanners has increased the use of digital technology in dental procedures. However, data on the accuracy of abutment scans according to the distance between the adjacent tooth and the abutment are lacking. PURPOSE: The purpose of this in vitro study was to compare the 3D accuracy of abutment scans according to the distance between the adjacent tooth and the abutment. MATERIAL AND METHODS: A right maxillary first molar was removed and scanned with an industrial 3D scanner, and the image was extracted as a standard tessellation language (STL) file...
May 27, 2020: Journal of Prosthetic Dentistry
Aiko Machiya, Sho Tsukamoto, Satoshi Ohte, Mai Kuratani, Naoto Suda, Takenobu Katagiri
Teeth consist of two major tissues, enamel and dentin, which are formed during development by epithelial and mesenchymal cells, respectively. Rodent incisors are useful experimental models for studying the molecular mechanisms of tooth formation because they are simultaneously growing in not only embryos but also adults. Members of the transforming growth factor-β (TGF-β) family regulate epithelial-mesenchymal interactions through an essential coactivator, Smad4. In the present study, we established Smad4 conditional knockout (cKO) mice and examined phenotypes in adult incisors...
May 27, 2020: Bone
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