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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/28453689/periodontal-disease-edentulism-and-pancreatic-cancer-a-meta-analysis
#2
P Maisonneuve, S Amar, A B Lowenfels
Background: Periodontal disease (PD), now our commonest infectious disorder leads to tooth loss, and has been linked to various systemic diseases, including various types of cancer. The aim of this study is to provide a systematic review and a meta-analysis of the relationship between PD, edentulism, and pancreatic cancer (PC). Patients and methods: From an initial review of 327 references we selected eight studies concerning periodontitis or edentulism with sufficient quantitative information to allow us to examine the risk of PC...
May 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28453484/can-better-management-of-periodontal-disease-delay-the-onset-and-progression-of-alzheimer-s-disease
#3
Alice Harding, Sarita Robinson, St John Crean, Sim K Singhrao
A risk factor relationship exists between periodontal disease and Alzheimer's disease (AD) via tooth loss, and improved memory following dental intervention. This links the microbial contribution from indigenous oral periodontal pathogens to the manifestation of chronic conditions, such as AD. Here, we use Porphyromonas gingivalis infection to illustrate its effect on mental health. P. gingivalis infection, in its primary sub-gingival niche, can cause polymicrobial synergy and dysbiosis. Dysbiosis describes the residency of select commensals from the oral cavity following co-aggregation around the dominant keystone pathogen, such as P...
April 25, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28449082/oral-health-and-mortality-in-the-golestan-cohort-study
#4
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/28449041/periodontal-disease-tooth-loss-and-cancer-risk
#5
Dominique S Michaud, Zhuxuan Fu, Jian Shi, Mei Chung
Periodontal disease, which includes gingivitis and periodontitis, is highly prevalent in adults and disease severity increases with age. The relationship between periodontal disease and oral cancer has been examined for several decades, but there is increasing interest in the link between periodontal disease and overall cancer risk, with systemic inflammation serving as the main focus for biological plausibility. Numerous case-control studies have addressed the role of oral health in head and neck cancer, and several cohort studies have examined associations with other types of cancers over the past decade...
April 25, 2017: Epidemiologic Reviews
https://www.readbyqxmd.com/read/28448807/alternative-sweeteners-influence-the-biomass-of-oral-biofilm
#6
Fathilah Abdul Razak, Baizatul Amirah Baharuddin, Elisya Farha Mohd Akbar, Amira Hanim Norizan, Nur Fazilah Ibrahim, Md Yusoff Musa
OBJECTIVE: Compact-structured oral biofilm accumulates acids that upon prolonged exposure to tooth surface, causes demineralisation of enamel. This study aimed to assess the effect of alternative sweeteners Equal Stevia(®), Tropicana Slim(®), Pal Sweet(®) and xylitol on the matrix-forming activity of plaque biofilm at both the early and established stages of formation. METHODS: Saliva-coated glass beads (sGB) were used as substratum for the adhesion of a mixed-bacterial suspension of Streptococcus mutans, Streptococcus sanguinis and Streptococcus mitis...
April 20, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28448806/exostosin-1-is-expressed-in-human-odontoblasts
#7
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/28448691/clinical-characterization-and-genetic-analysis-of-korean-patients-with-x-linked-charcot-marie-tooth-disease-type-1
#8
Young Bin Hong, Jin-Mo Park, Jin Seok Yu, Da Hye Yoo, Da Eun Nam, Hyung Jun Park, Ji-Su Lee, Sun Hee Hwang, Ki Wha Chung, Byung-Ok Choi
Mutations in the gap junction protein beta 1 gene (GJB1) cause X-linked Charcot-Marie-Tooth disease type 1 (CMTX1). CMTX1 is representative of the intermediate type of CMT, having both demyelinating and axonal neuropathic features. We analyzed the clinical and genetic characterization of 128 patients with CMTX1 from 63 unrelated families. Genetic analysis revealed a total of 43 mutations including 6 novel mutations. Ten mutations were found from two or more unrelated families. p.V95M was most frequently observed...
April 27, 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/28447749/dental-and-periodontal-phenotypes-of-dlx2-overexpression-in-mice
#9
Jiewen Dai, Jiawen Si, Ningjuan Ouyang, Jianfei Zhang, Dandan Wu, Xudong Wang, Guofang Shen
Distal-less homeobox 2 (Dlx2) is a member of the homeodomain family of transcription factors and is important for the development of cranial neural crest cells (CNCCs)‑derived craniofacial tissues. Previous studies revealed that Dlx2 was expressed in the cementum and a targeted null mutation disrupted tooth development in mice. However, whether Dlx2 overexpression may impair in vivo tooth morphogenesis remains to be elucidated. The present study used a transgenic mouse model to specifically overexpress Dlx2 in neural crest cells in order to identify the dental phenotypes in mice by observation, micro‑computed tomography and histological examination...
March 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447734/high-glucose-promotes-the-osteogenic-differentiation-capability-of-human-periodontal-ligament-fibroblasts
#10
Sujiwan Seubbuk, Hathaitip Sritanaudomchai, Julalux Kasetsuwan, Rudee Surarit
Periodontal ligament fibroblasts (PDLFs) are important cells, which are involved in maintaining tooth integrity. Diabetes has been found to be associated with periodontal disease in a bidirectional manner. The aim of the present study was to investigate the stemness properties of human PDLFs (HPDLFs) in high glucose conditions. HPDLFs were analyzed for their osteogenic differentiation capacity by inducing the cells with osteogenic medium in various glucose concentrations. The gene expression was then examined using reverse transcription‑quantitative polymerase chain reaction analysis, and examinations of alkaline phosphatase activity and nodule formation were performed...
March 16, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447324/craniofacial-morphology-and-dental-maturity-in-children-with-reduced-somatic-growth-of-different-aetiology-and-the-effect-of-growth-hormone-treatment
#11
REVIEW
Sotiria Davidopoulou, Athina Chatzigianni
Children with reduced somatic growth may present various endocrinal diseases, especially growth hormone deficiency (GHD), idiopathic short stature (ISS), chromosomal aberrations, or genetic disorders. In an attempt to normalize the short stature, growth hormone (GH) is administered to these children. The aim of this literature review was to collect information about the craniofacial morphology and dental maturity in these children and to present the existing knowledge on the effect of GH treatment on the above structures...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28446072/the-influence-of-force-direction-on-the-fracture-pattern-and-fracture-resistance-of-canine-teeth-in-dogs
#12
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
#13
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/28444905/the-value-of-a-combined-word-recognition-and-knowledge-measure-to-understand-characteristics-of-our-patients-oral-health-literacy
#14
Kathryn A Atchison, Mark D Macek, Daniela Markovic
OBJECTIVE: The objective of the analysis was to examine the association between sociodemographic and dental understanding and utilization characteristics and lower oral health literacy (HL) and knowledge. METHODS: The cross-sectional Multicenter Oral Health Literacy Research Study (MOHLRS) recruited and interviewed 923 English-speaking, initial care-seeking adults. The questionnaire included participant sociodemographic characteristics, measures of the participant's understanding and utilization of dentistry, and two oral HL measures, the Rapid Estimate of Adult Literacy in Medicine and Dentistry (REALM-D) and the Comprehensive Measure of Oral Health Knowledge (CMOHK), which were combined into a new composite HL and knowledge measure, the MOHLR-K...
April 26, 2017: Community Dentistry and Oral Epidemiology
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
#15
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/28444179/a-novel-method-for-superimposition-and-measurements-on-maxillary-digital-3d-models-studies-on-validity-and-reliability
#16
Niels Ganzer, Ingalill Feldmann, Per Liv, Lars Bondemark
Background: Serial 3D models can be used to analyze changes, but correct superimposition is crucial before measurements can be assessed. Earlier studies show that every palatal structure changes due to growth or treatment. Here, we describe a new method that uses an algorithm-based analysis to perform superimpositions and measurements in maxillary 3D models. This method can be used to identify deformations. In a second step, only unchanged areas are used for superimposition. Objectives: This study investigates the validity and reliability of this novel method...
April 22, 2017: European Journal of Orthodontics
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/28444014/photoelastic-analysis-of-stress-generated-by-connecticut-intrusion-arch-cia
#18
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
#19
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
https://www.readbyqxmd.com/read/28442952/comparison-of-onset-anesthesia-time-and-injection-discomfort-of-4-articaine-and-2-mepivacaine-during-teeth-extractions
#20
Giath Gazal, Rashdan Alharbi, Wamiq Musheer Fareed, Esam Omar, Albraa Badr Alolayan, Hassan Al-Zoubi, Ahmad A Alnazzawi
OBJECTIVE: To investigate the speed of action and injection discomfort of 4% articaine and 2% mepivacaine for upper teeth extractions. MATERIALS AND METHODS: Forty-five patients were included in the articaine 4% group, and 45 in the mepivacaine 2% control group. After all injections, soft and hard tissue numbness was objectively gauged by dental probe at intervals of 15 s. Furthermore, the discomfort of the injections were recorded by the patients after each treatment on standard 100 mm visual analog scales, tagged at the endpoints with "no pain" (0 mm) and "unbearable pain" (100 mm)...
April 2017: Saudi Journal of Anaesthesia
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