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https://www.readbyqxmd.com/read/29677217/optimisation-of-three-dimensional-lower-jaw-resection-margin-planning-using-a-novel-black-bone-magnetic-resonance-imaging-protocol
#1
Astrid M Hoving, Joep Kraeima, Rutger H Schepers, Hildebrand Dijkstra, Jan Hendrik Potze, Bart Dorgelo, Max J H Witjes
BACKGROUND: MRI is the optimal method for sensitive detection of tumour tissue and pre-operative staging in oral cancer. When jawbone resections are necessary, the current standard of care for oral tumour surgery in our hospital is 3D virtual planning from CT data. 3D printed jawbone cutting guides are designed from the CT data. The tumour margins are difficult to visualise on CT, whereas they are clearly visible on MRI scans. The aim of this study was to change the conventional CT-based workflow by developing a method for 3D MRI-based lower jaw models...
2018: PloS One
https://www.readbyqxmd.com/read/29655415/clinicopathological-analysis-of-232-radicular-cysts-of-the-jawbone-in-a-population-of-southern-taiwanese-patients
#2
Jeng-Huey Chen, Chih-Huang Tseng, Wen-Chen Wang, Ching-Yi Chen, Fu-Hsiung Chuang, Yuk-Kwan Chen
This retrospective study aimed to evaluate the clinicopathological features of 232 cases of radicular cyst (January 2001-December 2016) submitted for histopathological examination to Department of Oral Pathology by endodontists in our institution. Demographic data including age, gender, affected site, involved tooth, and histopathological features, were reviewed. The study population comprised 133 females (57.3%) and 99 males (42.7%), with a mean age of 40.5 years and an age range of 13-78 years. Two-hundred and one cysts occurred in the maxilla (86...
April 2018: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29650506/evaluating-the-validity-of-current-mainstream-wearable-devices-in-fitness-tracking-under-various-physical-activities-comparative-study
#3
Junqing Xie, Dong Wen, Lizhong Liang, Yuxi Jia, Li Gao, Jianbo Lei
BACKGROUND: Wearable devices have attracted much attention from the market in recent years for their fitness monitoring and other health-related metrics; however, the accuracy of fitness tracking results still plays a major role in health promotion. OBJECTIVE: The aim of this study was to evaluate the accuracy of a host of latest wearable devices in measuring fitness-related indicators under various seminatural activities. METHODS: A total of 44 healthy subjects were recruited, and each subject was asked to simultaneously wear 6 devices (Apple Watch 2, Samsung Gear S3, Jawbone Up3, Fitbit Surge, Huawei Talk Band B3, and Xiaomi Mi Band 2) and 2 smartphone apps (Dongdong and Ledongli) to measure five major health indicators (heart rate, number of steps, distance, energy consumption, and sleep duration) under various activity states (resting, walking, running, cycling, and sleeping), which were then compared with the gold standard (manual measurements of the heart rate, number of steps, distance, and sleep, and energy consumption through oxygen consumption) and calculated to determine their respective mean absolute percentage errors (MAPEs)...
April 12, 2018: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/29610110/counting-steps-in-activities-of-daily-living-in-people-with-a-chronic-disease-using-nine-commercially-available-fitness-trackers-cross-sectional-validity-study
#4
Darcy Ummels, Emmylou Beekman, Kyra Theunissen, Susy Braun, Anna J Beurskens
BACKGROUND: Measuring physical activity with commercially available activity trackers is gaining popularity. People with a chronic disease can especially benefit from knowledge about their physical activity pattern in everyday life since sufficient physical activity can contribute to wellbeing and quality of life. However, no validity data are available for this population during activities of daily living. OBJECTIVE: The aim of this study was to investigate the validity of 9 commercially available activity trackers for measuring step count during activities of daily living in people with a chronic disease receiving physiotherapy...
April 2, 2018: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/29590663/do-ultra-low-multidetector-computed-tomography-doses-and-iterative-reconstruction-techniques-affect-subjective-classification-of-bone-type-at-dental-implant-sites
#5
Asma'a A Al-Ekrish, Sara A Alfadda, Dania Tamimi, Wafa Alfaleh, Romed Hörmann, Wolfgang Puelacher, Gerlig Widmann
PURPOSE: To investigate whether ultra-low-dose multidetector computed tomography (MDCT) combined with the reconstruction techniques filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASIR), or model-based iterative reconstruction (MBIR) alters the subjective classification of revised Lekholm and Zarb (LZ) bone types at prospective dental implant sites. MATERIALS AND METHODS: Three cadavers underwent a reference MDCT examination using a standard dose volume (CT dose index [CTDIvol ]: 29...
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29577656/detecting-the-effect-of-bisphosphonates-during-osteoporosis-treatment-on-jawbones-using-multidetector-computed-tomography-the-osteosyr-project
#6
Imad Barngkgei, Razan Khattab
AIM: The aim of the present cross-sectional study was to investigate the effects of bisphosphonates (BP), prescribed for osteoporosis, on jawbones using multidetector computed tomography (MDCT). METHODS: Fifty-three women who had dual-energy X-ray absorptiometry examination were scanned by MDCT. Both the cortical and the trabecular parts of the alveolar and the cortical bones were compared between BP users and non-BP users using a number of radiological measurements...
March 25, 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29504363/follow-up-of-patients-with-systemic-immunological-diseases-undergoing-fatty-degenerative-osteolysis-of-the-jawbone-surgery-and-treated-with-rantes-27ch
#7
I Floris, J Lechner, B Lejeune
Regulated-on-activation, normal T cell expressed and secreted (also called RANTES, CCL5 or R/C) is a chemotactic cytokine that plays a key role in recruiting immune cells to inflammatory sites. R/C is involved in the pathogenesis of many systemic immune-mediated diseases (SIDs) and is upregulated in fatty-degenerative osteolysis jawbone (FDOJ) cavitations. Surgical cleaning of degenerative areas reduces the source of chronic R/C but might not be sufficient to re-establish the altered immunological patterns...
January 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29444105/accuracy-and-precision-of-consumer-level-activity-monitors-for-stroke-detection-during-wheelchair-propulsion-and-arm-ergometry
#8
Jochen Kressler, Joshua Koeplin-Day, Benedikt Muendle, Brice Rosby, Elizabeth Santo, Antoinette Domingo
The purpose of this study was to evaluate whether consumer-level activity trackers can estimate wheelchair strokes and arm ergometer revolutions. Thirty able-bodied participants wore three consumer-level activity trackers (Garmin VivoFit, FitBit Flex, and Jawbone UP24) on the wrist. Participants propelled a wheelchair at fixed frequencies (30, 45 and 60 strokes per minute (spm)) three minutes each and at pre-determined varied frequencies, (30-80 spm) for two minutes. Participants also freely wheeled through an obstacle course...
2018: PloS One
https://www.readbyqxmd.com/read/29434012/reducing-sedentary-time-for-obese-older-adults-protocol-for-a-randomized-controlled-trial
#9
Dori E Rosenberg, Amy K Lee, Melissa Anderson, Anne Renz, Theresa E Matson, Jacqueline Kerr, David Arterburn, Jennifer B McClure
BACKGROUND: Older adults have high rates of obesity and are prone to chronic health conditions. These conditions are in part due to high rates of sedentary time (ST). As such, reducing ST could be an innovative strategy for improving health outcomes among obese older adults. To test this theory, we developed a novel, technology-enhanced intervention to reduce sitting time (I-STAND) and pilot tested it to assess the feasibility, acceptability, and preliminary effects of the intervention on ST and biometric outcomes...
February 12, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29409125/editorial-commentary-on-the-paper-by-kindstedt-et-al-marginal-jawbone-loss-is-associated-with-onset-of-ra-and-is-related-to-plasma-level-of-rankl
#10
EDITORIAL
Paola de Pablo
Periodontitis is arguably the most prevalent chronic inflammatory disease of humans, affecting more than 45% of US adults aged 30 years and older (1, 2). The defining feature of periodontitis is chronic inflammation of the tooth supporting tissues leading to the progressive irreversible destruction of periodontal ligament and alveolar bone, resulting in the formation of periodontal pockets and eventually tooth loss if untreated. Host susceptibility is clearly of primary importance and tobacco smoking is a strong environmental risk factor (2)...
February 6, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29408890/electron-spin-resonance-esr-dose-measurement-in-bone-of-hiroshima-a-bomb-victim
#11
Angela Kinoshita, Oswaldo Baffa, Sérgio Mascarenhas
Explosion of the bombs in Hiroshima and Nagasaki corresponds to the only historical moment when atomic bombs were used against civilians. This event triggered countless investigations into the effects and dosimetry of ionizing radiation. However, none of the investigations has used the victims' bones as dosimeter. Here, we assess samples of bones obtained from fatal victims of the explosion by Electron Spin Resonance (ESR). In 1973, one of the authors of the present study (SM) traveled to Japan and conducted a preliminary experiment on the victims' bone samples...
2018: PloS One
https://www.readbyqxmd.com/read/29287661/time-dependent-behavior-of-porcine-periodontal-ligament-a-combined-experimental-numeric-in-vitro-study
#12
Thomas Johannes Knaup, Cornelius Dirk, Susanne Reimann, Ludger Keilig, Meike Eschbach, Heike Korbmacher-Steiner, Christoph Bourauel
INTRODUCTION: The aim of this study was to analyze the time-dependent in-vitro behavior of the periodontal ligament (PDL) by determining the material parameters using specimens of porcine jawbone. Time-dependent material parameters to be determined were expected to complement the results from earlier biomechanical studies. METHODS: Five mandibular deciduous porcine premolars were analyzed in a combined experimental-numeric study. After selecting suitable specimens (excluding root resorption) and preparing the measurement system, the specimens were deflected by a distance of 0...
January 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29287657/plane-to-plane-analysis-of-mandibular-misalignment-in-patients-with-facial-asymmetry
#13
Tung-Yiu Wong, Jia-Kuang Liu, Tung-Chin Wu, Yi-Hsuan Tu, Ken-Chung Chen, Jing-Jing Fang, Ke-Hsin Cheng, Jing-Wei Lee
INTRODUCTION: Little is known regarding how the mandible rotates in facial asymmetry. The purpose of this study was to study mandibular misalignment with a new plane-to-plane analysis method in patients with facial asymmetry. METHODS: Optimal symmetry planes (OSPs) were generated by computing the greatest count of paired voxels on opposing sides of the computerized tomography image of the structure. The mandibular OSP was measured against the midfacial OSP for its alignment...
January 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29274589/exogenous-vegf-introduced-by-bioceramic-composite-materials-promotes-the-restoration-of-bone-defect-in-rabbits
#14
Hedong Yu, Xiantao Zeng, Cai Deng, Congyu Shi, Jun Ai, Weidong Leng
This study aimed to investigate the effect of exogenous vascular endothelial growth factor (VEGF) introduced by bioceramic composite materials on jawbone defect. Rabbits were randomly divided into four groups: control, sham, model, and stent. In the model group, holes of jawbone defect were created through surgery. In the stent group, rabbits with jawbone defect were treated with polyether ketone (PEK)/biphasic bioceramic ((PEK-BBC)) composite materials encapsulating VEGF. At 4, 8, and 16 weeks post-operation, HE and Van Gieson staining of jawbones were performed to characterize the repair status of the bone defect...
February 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29274154/panoramic-and-skull-imaging-may-aid-in-the-identification-of-multiple-myeloma-lesions
#15
K-M Faria, T-B Brandão, W-G Silva, J Pereira, F-S Neves, M-C Alves, W-H ShinLeataku, M-A Lopes, A-C-P Ribeiro, C-A Migliorati, A-R Santos-Silva
BACKGROUND: The purpose of this study was to investigate the presence of punched-out lesions in craniofacial bones using three different radiographic protocols in a large cohort of patients. MATERIAL AND METHODS: One hundred fifty-five MM patients were evaluated using panoramic and skull (frontal and lateral) radiographs, which were performed in all patients at the time of MM diagnosis. The diagnostic potential for detecting punched-out lesions was compared among the radiographic techniques...
January 1, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29243679/surgery-related-factors-affecting-the-stability-of-orthodontic-mini-implants-screwed-in-alveolar-process-interdental-spaces-a-systematic-literature-review
#16
Greta Gintautaitė, Alė Gaidytė
The ambiguous results of scientific researches on surgical factors affecting the stability of mini implants (MI) impels the physicians to constantly analyze this problem. The objective of this article was to conduct a systematic literature review about surgery related factors affecting the stability of MI screwed in alveolar process buccal surface between the second premolar and first molar roots based on peer reviewed publications of 2009-2015. The Cochrane and PRISMA references were used while searching for scientific literature...
2017: Stomatologija
https://www.readbyqxmd.com/read/29210080/the-permian-reptile-opisthodontosaurus-carrolli-a-model-for-acrodont-tooth-replacement-and-dental-ontogeny
#17
Yara Haridy, Aaron R H LeBlanc, Robert R Reisz
Continuous tooth replacement is common for tetrapods, but some groups of acrodont lepidosaurs have lost the ability to replace their dentition (monophyodonty). Acrodonty, where the tooth attaches to the apex of the jawbone, is an unusual form of tooth attachment that has been associated with the highly autapomorphic condition of monophyodonty. Beyond Lepidosauria, very little is known about the relationship between acrodonty and monophyodonty in other amniotes. We test for this association with a detailed study of the dentition of Opisthodontosaurus, an unusual Early Permian captorhinid eureptile with acrodont dentition...
March 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29195021/marginal-jawbone-loss-is-associated-with-onset-of-rheumatoid-arthritis-and-is-related-to-plasma-level-of-receptor-activator-of-nuclear-factor-kappa-b-ligand-rankl
#18
Elin Kindstedt, Linda Johansson, Py Palmqvist, Cecilia Koskinen Holm, Heidi Kokkonen, Ingegerd Johansson, Solbritt Rantapää Dahlqvist, Pernilla Lundberg
OBJECTIVES: We investigated whether periodontitis, displayed as marginal jawbone loss, preceded onset of symptoms of RA. Furthermore, we analysed plasma levels of receptor activator of nuclear factor kappa-B (RANKL), a cytokine crucial for bone resorption and of anti-citrullinated peptide antibodies (ACPA) in pre-symptomatic individuals compared with controls. METHODS: Marginal jawbone levels were measured on dental radiographs from the premolar/molar regions of the jaws of 176 subjects of whom 93 had developed RA...
December 1, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29184447/aseptic-avascular-osteonecrosis-local-silent-inflammation-in-the-jawbone-and-rantes-ccl5-overexpression
#19
Johann Lechner, Sabine Schuett, Volker von Baehr
Of the definitions listed in the International Statistical Classification of Diseases and Related Health Problems, tenth revision (ICD-10), two disease descriptions can be found together: "idiopathic aseptic bone necrosis" and "avascular bone necrosis." The relevant literature on both the conditions abbreviates both as "aseptic ischemic osteonecrosis in the jawbone" (AIOJ). To shed light on the clinical details of this condition, osteolytic jawbone samples of 24 patients with different systemic immunological diseases were examined using four steps: presurgical dental X-ray, postsurgical histology, polymerase chain reaction DNA analysis (PCR DNA) of bacteria, and RANTES/CCL5 (R/C) expression...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/29175271/gnathodiaphyseal-dysplasia-severe-atypical-presentation-with-novel-heterozygous-mutation-of-the-anoctamin-gene-ano5
#20
Ghada A Otaify, Michael P Whyte, Gary S Gottesman, William H McAlister, J Eric Gordon, Abby Hollander, Marisa V Andrews, Samir K El-Mofty, Wei-Shen Chen, Deborah V Veis, Marina Stolina, Albert S Woo, Panagiotis Katsonis, Olivier Lichtarge, Fan Zhang, Marwan Shinawi
Gnathodiaphyseal dysplasia (GDD; OMIM #166260) is an ultra-rare autosomal dominant disorder caused by heterozygous mutation in the anoctamin 5 (ANO5) gene and features fibro-osseous lesions of the jawbones, bone fragility with recurrent fractures, and bowing/sclerosis of tubular bones. The physiologic role of ANO5 is unknown. We report a 5-year-old boy with a seemingly atypical and especially severe presentation of GDD and unique ANO5 mutation. Severe osteopenia was associated with prenatal femoral fractures, recurrent postnatal fractures, and progressive bilateral enlargement of his maxilla and mandible beginning at ~2months-of-age that interfered with feeding and speech and required four debulking operations...
February 2018: Bone
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