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https://www.readbyqxmd.com/read/28453949/replacing-heavily-damaged-teeth-by-third-molar-autotransplantation-with-the-use-of-cone-beam-computed-tomography-and-rapid-prototyping
#1
J P Verweij, D Anssari Moin, D Wismeijer, J P R van Merkesteyn
This article describes the autotransplantation of third molars to replace heavily damaged premolars and molars. Specifically, this article reports on the use of preoperative cone-beam computed tomographic planning and 3-dimensional (3D) printed replicas of donor teeth to prepare artificial tooth sockets. In the present case, an 18-year-old patient underwent autotransplantation of 3 third molars to replace 1 premolar and 2 molars that were heavily damaged after trauma. Approximately 1 year after the traumatic incident, autotransplantation with the help of 3D planning and rapid prototyping was performed...
April 4, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28453886/remote-diagnosis-of-traumatic-dental-injuries-using-digital-photographs-captured-via-a-mobile-phone
#2
Rogério de Almeida Geraldino, Liliana Vicente Melo de Lucas Rezende, Cibele Queiroz da-Silva, Júlio César Franco Almeida
BACKGROUND: Intra-oral photographs has been aided diagnosis of several pathologies in teledentistry. Mobile phone cameras may produce high quality photographs, presenting itself as a viable tool for remote diagnosis of traumatic dental injuries. Aim To evaluate the levels of inter-examiner agreement in cases of traumatic dental injuries when comparing diagnoses conducted in person and remotely. MATERIAL AND METHODS: The sample included 40 patients with 73 traumatized teeth, and a total of 90 diagnoses, who had presented to two dental clinics, one private and the other public, in Brazil's Federal District...
April 28, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28453449/effect-of-upright-and-slouch-sitting-postures-and-voluntary-teeth-clenching-on-hand-grip-strength-in-young-male-adults
#3
Ahmad Alghadir, Hamayun Zafar, Zaheen A Iqbal
BACKGROUND: Estimation of handgrip strength (HGS) is routinely used by clinicians and epidemiologists for objective assessment of functional status of hand and upper extremity. It is also used as an indirect indicator of overall physical strength and health status in variety of clinical situations and chronic general medical conditions. OBJECTIVE: The present study was conducted to examine the effects of upright and slouch sitting postures and voluntary teeth clenching on hand grip strength in healthy young male subjects...
April 21, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28449265/a-pilot-study-of-nocturnal-temporalis-muscle-activity-in-tmd-diagnostic-groups-of-women
#4
Feng Wei, Mark H Van Horn, Matthew C Coombs, Xin She, Theresa S Gonzales, Yoly M Gonzalez, JoAnna M Scott, Laura R Iwasaki, Jeffery C Nickel, Hai Yao
BACKGROUND: Temporomandibular disorder (TMD) incidences are believed to be related to parafunctional behaviors like teeth clenching. OBJECTIVES: This pilot study aimed to (i) develop an automated clench-detection algorithm, and (ii) apply the algorithm to test for differences in nocturnal clenching in women with and without TMD. METHODS: Subjects gave informed consent to participate. Adult women were categorized using Diagnostic Criteria for TMD according to presence/absence (+/-) of both TM joint disc placement (DD) and chronic pain (P) into two groups (+DD+P, -DD-P) with 12 subjects each...
April 27, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28449082/oral-health-and-mortality-in-the-golestan-cohort-study
#5
Emily Vogtmann, Arash Etemadi, Farin Kamangar, Farhad Islami, Gholamreza Roshandel, Hossein Poustchi, Akram Pourshams, Masoud Khoshnia, Abdulsamad Gharravi, Paul J Brennan, Paolo Boffetta, Sanford M Dawsey, Reza Malekzadeh, Christian C Abnet
Background: Previous studies have found associations between oral health and mortality, but the majority of previous studies have been conducted in high-income countries. Methods: We used data from the Golestan Cohort Study, a study of 50 045 people aged 40 to 75 years in north eastern Iran, recruited from January 2004 to June 2008. Tooth loss and decayed, missing and filled teeth (DMFT) were assessed by trained physicians. Frequency of tooth brushing and use of dentures were self-reported...
April 24, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28448806/exostosin-1-is-expressed-in-human-odontoblasts
#6
Virve Pääkkönen, Stina Saraniemi, Françoise Bleicher, Zvi Nevo, Leo Tjäderhane
OBJECTIVE: Dental pulp is soft connective tissue maintaining the vitality of the tooth, while odontoblasts form the dentin. Our earlier DNA microarray analysis revealed expression of putative tumour suppressor exostosin 1 (EXT-1) in odontoblasts. EXT-1 is essential for heparan sulphate synthesis, which may play a role in the dentin mineralization. Since the absence of the functional EXT-1 causes bone tumours, expression in odontoblasts is interesting. Our aim was to analyse further the EXT-1 expression in human tooth...
April 8, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28447407/wiedemann-rautenstrauch-syndrome-a-phenotype-analysis
#7
Stefano Paolacci, Debora Bertola, José Franco, Shehla Mohammed, Marco Tartaglia, Bernd Wollnik, Raoul C Hennekam
Wiedemann-Rautenstrauch syndrome (WRS) is a neonatal progeroid disorder characterized by growth retardation, lipodystrophy, a distinctive face, and dental anomalies. Patients reported to date demonstrate a remarkable variability in phenotype, which hampers diagnostics. We performed a literature search, and analyzed 51 reported patients, using the originally reported patients as "gold standard." In 15 patients sufficient information and photographic evidence was available to confirm the clinical diagnosis. In 12 patients the diagnosis was suggestive but lack of data prevented a definite diagnosis, and in 24 patients an alternative diagnosis was likely...
April 26, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28446851/an-invitro-evaluation-of-the-accuracy-of-two-electronic-apex-locators-to-determine-working-length-in-the-presence-of-various-irrigants
#8
Ashwini B Prasad, Srivastava Harshit, Srivastava Arora Aastha, Raisingani Deepak
BACKGROUND: Cleaning and shaping of root canal system requires various irrigating solutions. The question is whether the presence of irrigation solution alters working length determination using apex locators. The purpose of this study was to compare the accuracy of Root ZX and i-Root apex locator for determining working length in the presence of different irrigating solution. MATERIALS AND METHOD: Eighty extracted single rooted human teeth were used. The teeth were sectioned at Cemento Enamel Junction (CEJ) and actual canal length determined...
September 2016: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/28446237/oral-impacts-on-quality-of-life-and-problem-oriented-attendance-among-south-east-london-adults
#9
Piyada Gaewkhiew, Eduardo Bernabé, Jennifer E Gallagher, Charlotte Klass, Elsa K Delgado-Angulo
BACKGROUND: Dental care seeking behaviour is often driven by symptoms. The value of oral health related quality of life (OHRQoL) measures to predict utilisation of dental services is unknown. This study aims to explore the association between OHRQoL and problem-oriented dental attendance among adults. METHODS: We analysed cross-sectional data for 705 adults, aged 16 years and above, living in three boroughs of Inner South East London. Data were collected during structured interviews at home...
April 26, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28446178/inequality-in-unmet-dental-care-needs-among-south-korean-adults
#10
Nayoung Kim, Chang-Yup Kim, Hosung Shin
BACKGROUND: The current public health research agenda was to identify the means to reduce oral health inequalities internationally. The objectives of this study were to provide evidence of inequality in unmet dental needs and to find influencing factors attributable to those among South Korean adults. METHODS: Pooled cross-sectional data from the fourth Korean National Health and Nutrition Examination Survey (2007-2009) on 17,141 Korean adults were used. Demographic factors (sex, age, and marital status), socioeconomic factors (education level, employment status, and income level), need factors (normative dental needs and self-perceived oral health status), and oral health-related factors (the number of decayed teeth, the presence of periodontitis, and the number of missing teeth) were included...
April 26, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28446072/the-influence-of-force-direction-on-the-fracture-pattern-and-fracture-resistance-of-canine-teeth-in-dogs
#11
Stephanie Goldschmidt, Catherine Zimmerman, Caitlyn Collins, Scott Hetzel, Heidi-Lynn Ploeg, Jason W Soukup
Biomechanical studies of the elongated canine tooth of animals are few, and thus our understanding of mechanical and physical properties of animal teeth is limited. The objective of the present study was to evaluate the influence of force direction on fracture resistance and fracture pattern of canine teeth in an ex vivo dog cadaver model. Forty-five extracted canine teeth from laboratory beagle dogs were standardized by hard tissue volume and randomly distributed among 3 force direction groups. The teeth were secured within a universal testing machine and a load was applied at different directions based on testing group...
January 1, 2017: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/28446043/crown-heights-in-the-permanent-teeth-of-47-xyy-males
#12
Raija Pentinpuro, Paula Pesonen, Lassi Alvesalo, Raija Lähdesmäki
OBJECTIVE: The results in human sex chromosome aneuploidies had shown that the extra Y chromosome increases permanent and deciduous tooth crown sizes in the mesiodistal and labiolingual directions. The hypothesis of the study was that the additional Y chromosome increases the permanent tooth crown growth in a vertical dimension. We also aimed to observe possible sex difference in the permanent tooth crown height. MATERIAL AND METHODS: Data on 15 47,XYY males or males with an extra Y chromosome, nine male relatives (five brothers and four fathers) and 45 male and 48 female population controls had been gathered previously for Professor Lassi Alvesalo's KVANTTI Research Project...
April 26, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28446031/influences-of-geometrical-and-mechanical-properties-of-bone-tissues-in-mandible-behaviour-experimental-and-numerical-predictions
#13
A Ramos, Yi Nyashin, M Mesnard
The properties and geometry of bone in the mandible play a key role in mandible behaviour during a person's lifetime, and attention needs to be paid to the influence of bone properties. We analysed the effect of bone geometry, size and bone properties in mandible behaviour, experimenting on cadaveric mandibles and FE models. The study was developed using the geometry of a cadaveric mandible without teeth. Three models of cadaveric condyles were experimentally tested with instrumented with four rosettes, and a condyle reaction of 300 N...
April 26, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28445623/life-threatening-injury-caused-by-complete-impalement-of-a-toothbrush-case-report
#14
Akiko Umibe, Kazuhiro Omura, Takuya Hachisu, Utaro Anazawa, Yasuhiro Tanaka
Toothbrushes are the most common cause of foreign body injury to the oral cavity in children, but complete impalement by a toothbrush is an extremely rare occurrence and has not been reported previously. This report describes a 28-month girl who fell from a one-meter ledge while brushing her teeth. Her toothbrush penetrated the oral cavity and could not be removed, so she was rushed to the hospital with the toothbrush in place. Contrast-enhanced computed tomography showed penetration of the toothbrush from the oral cavity into and through the right posterior neck at the level of the bifurcation of the common carotid artery...
April 26, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28445536/assessment-of-dental-ontogeny-in-late-miocene-hipparionines-from-the-lamagou-fauna-of-fugu-shaanxi-province-china
#15
Yangfan Li, Tao Deng, Hong Hua, Yongxiang Li, Yunxiang Zhang
A collection of 28 hipparionine skull and mandible fossils with a dated age of approximately 7.4 Ma from Fugu, Shaanxi, northwestern China (belonging to Hipparion chiai and Hipparion cf. coelophyes) shows an age distribution in a successive development sequence. By observing the dentitions in these fossil materials, knowledge of dental ontogeny has been gained, such as the opening time of the posterior wall of post-fossettes, the displacement of the plis hypostyle, the morphologic changes of the protocone and hypocone, etc...
2017: PloS One
https://www.readbyqxmd.com/read/28444559/effectiveness-of-an-interdisciplinary-medical-hospital-admission-center-the-role-of-the-dental-section-in-the-interdisciplinary-system-for-perioperative-management-of-patients-awaiting-surgery
#16
Akifumi Enomoto, Eri Morikage, Takeshi Shimoide, Kazuhide Matsunaga, Suguru Hamada
Perioperative oral functional management (POFM) involves total oral management of a patient before surgery. Considerable benefits have been reported, but POFM remains scarce in medical settings. An interdisciplinary Medical Hospital Admission Center (MHAC) opened in our hospital in December 2014, and has since provided unified perioperative management for patients. This study reports on the clinical system and contributions of the systematized, standardized POFM applied through the MHAC. Patients awaiting surgery undergo oral screening before admission, with patients classified into three groups: red, needing surgical oral management (tooth extraction or other oral surgery) before surgery; yellow, needing non-surgical oral management before surgery, due to the planned surgery or the risk of tooth injury in connection with general anesthesia; or green, patients with good oral hygiene considered capable of suitable oral self-management...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28444165/proinflammatory-mediators-related-to-orthodontically-induced-periapical-root-resorption-in-rat-mandibular-molars
#17
Yoshiro Matsumoto, Siripen Sringkarnboriboon, Takashi Ono
Objectives: The early phase of orthodontic tooth movement involves acute inflammatory response that may induce bone resorption. The aim of this study was to localize and quantify cells in the periodontium expressing proinflammatory mediators during orthodontically induced periapical root resorption of the rat mandibular molars. Materials and methods: The levels of proinflammatory cytokines interleukin-1 (IL-1) α and β, tumor necrosis factor-α (TNF-α), inflammatory enzymes cyclooxygenase (COX) 1 and 2, and their product prostaglandin E2 (PGE2) in the root resorption site were compared to those in the corresponding area of the untreated periodontal ligament (PDL) of physiologically drifting teeth...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28444016/frictionless-segmented-mechanics-for-controlled-space-closure
#18
Ildeu Andrade
Extraction spaces may be needed to achieve specific orthodontic goals of positioning the dentition in harmony with the craniofacial complex. However, the fundamental reality that determines the occlusion final position is the control exerted by the orthodontist while closing the extraction spaces. A specific treatment objective may require the posterior teeth to remain in a constant position anteroposteriorly as well as vertically, while the anterior teeth occupy the entire extraction site. Another treatment objective may require the opposite, or any number of intentional alternatives of extraction site closure...
February 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28444014/photoelastic-analysis-of-stress-generated-by-connecticut-intrusion-arch-cia
#19
Alessandro Schwertner, Renato Rodrigues de Almeida, Alcides Gonini, Marcio Rodrigues de Almeida
OBJECTIVE: The present in vitro study evaluated, by means of the photoelastic technique, the effects generated by the Connecticut Intrusion Arch (CIA), with a 90o bend on the distal surface of molar tubes and using the 4 x 2 appliance on the anterior and posterior regions of the upper dental arch. METHODS: Five models were manufactured, in which two different clinical situations were correlated: 1) use of intrusion arch not cinched back and transpalatal bar for anchorage (Group 1); 2) use of intrusion arch cinched back and transpalatal bar for anchorage (Group 2)...
February 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28444013/third-molars-and-premolars-extraction-in-conventional-orthodontics-and-in-treatments-based-on-maxillary-bone-remodeling-with-temporary-anchorage-indications-and-care
#20
Alberto Consolaro
A bone is an anatomic structure in constant remodeling, with different, mutant and wonderfully inconstant designs. With every new and immediate functional demand, there are changes in cortical thickness, trabecular bone density and also in direction and size of trabeculae. Bones' non-stopping search is for adjusting to the functions induced by forces and movements required by a certain life style. Conventional orthodontic planning or with temporary anchorage based on bone remodeling takes into consideration the spaces that are - or may be - occupied by the teeth, in the formation of a functional and esthetic dental arch for the patient...
February 2017: Dental Press Journal of Orthodontics
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