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https://www.readbyqxmd.com/read/29772080/substance-p-and-calcitonin-gene-related-peptide-expression-in-human-periodontal-ligament-after-root-canal-preparation-with-reciproc-blue-waveone-gold-xp-endoshaper-and-hand-files
#1
J Caviedes-Bucheli, N Rios-Osorio, M Rey-Rojas, F Laguna-Rivero, M M Azuero-Holguin, L E Diaz, H Curtidor, J J Castaneda-Ramirez, H R Munoz
AIM: To quantify the Substance P (SP) and Calcitonin gene-related peptide (CGRP) expression in healthy human periodontal ligament from premolars after root canal preparation with Reciproc Blue, WaveOne Gold, XP EndoShaper and hand files. METHODOLOGY: Fifty human periodontal ligament samples were obtained from healthy mandibular premolars where extraction was indicated for orthodontic reasons. Prior to extraction, 40 of these premolars were equally divided into four groups, and root canals were prepared using four different systems: Reciproc Blue, WaveOne Gold, XP EndoShaper, and a hand instrumentation technique...
May 17, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29771843/facial-paralysis-in-patients-with-hemifacial-microsomia-frequency-distribution-and-association-with-other-omens-abnormalities
#2
Qiang Li, Xu Zhou, Yue Wang, Jin Qian, Qingguo Zhang
Although facial paralysis is a fundamental feature of hemifacial microsomia, the frequency and distribution of nerve abnormalities in patients with hemifacial microsomia remain unclear. In this study, the authors classified 1125 cases with microtia (including 339 patients with hemifacial microsomia and 786 with isolated microtia) according to Orbital Distortion Mandibular Hypoplasia Ear Anomaly Nerve Involvement Soft Tissue Dependency (OMENS) scheme. Then, the authors performed an independent analysis to describe the distribution feature of nerve abnormalities and reveal the possible relationships between facial paralysis and the other 4 fundamental features in the OMENS system...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29768340/the-patient-general-satisfaction-of-mandibular-single-implant-overdentures-and-conventional-complete-dentures-study-protocol-for-a-randomized-crossover-trial
#3
Manabu Kanazawa, Mariko Tanoue, Anna Miyayasu, Shin Takeshita, Daisuke Sato, Mari Asami, Thuy Vo Lam, Khaing Myat Thu, Ken Oda, Yuriko Komagamine, Shunsuke Minakuchi, Jocelyne Feine
BACKGROUND: Mandibular overdentures retained by a single implant placed in the midline of edentulous mandible have been reported to be more comfortable and function better than complete dentures. Although single-implant overdentures are still more costly than conventional complete dentures, there are a few studies which investigated whether mandibular single-implant overdentures are superior to complete dentures when patient general satisfaction is compared. The aim of this study is to assess patient general satisfaction with mandibular single-implant overdentures and complete dentures...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29765665/morphometric-assessment-of-pterosaur-jaw-disparity
#4
Charlie A Navarro, Elizabeth Martin-Silverstone, Thomas L Stubbs
Pterosaurs were a successful group of Mesozoic flying reptiles. They were the first vertebrate group to achieve powered flight and varied enormously in morphology and ecology, occupying a variety of niches and developing specialized feeding strategies. Ecomorphological principles suggest this variation should be reflected by great morphological diversity in the lower jaw, given that the mandible served as the primary apparatus for prey acquisition. Here we present the first study of mandibular shape disparity in pterosaurs and aim to characterize major aspects of variation...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764791/giant-cell-tumor-of-the-temporal-bone-and-skull-base-a-case-report
#5
İsa Kaya, Murat Benzer, Göksel Turhal, Gode Sercan, Cem Bilgen, Tayfun Kirazlı
Giant cell tumor (GCT) is a benign tumor that originates from undifferentiated mesenchymal cells of the bone marrow. The cranium as well as temporal bone is a rare location for GCTs. Despite its benign nature, GCT may be locally aggressive and has the potential to recur locally. Furthermore, GCT may give rise to pulmonary metastases (~1%) in addition to causing local bone destruction. Surgical excision is the treatment of choice for patients with GCT. We describe the case of a 56-year-old female who presented with headache and hearing loss with extensive GCT, which originated in the squamous part of the temporal bone and extended into the left mandibular fossa and middle ear...
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29764701/a-combination-of-skeletal-deformations-of-the-dorsal-mandible-and-temporomandibular-region-detected-in-orthopantomograms-of-patients-with-neurofibromatosis-type-1-indicates-an-associated-ipsilateral-plexiform-neurofibroma
#6
Reinhard E Friedrich, Anika Reul
PURPOSE: Neurofibromatosis type 1 (NF1) is a tumour suppressor syndrome and also a bone disease. In the craniofacial region, local skeletal deformities have been recorded in patients with NF1. Obvious syndrome-related alterations of the jaws are particularly conspicuous in the mandible. Here we aimed to analyse the mandibular alterations of NF1-affected individuals from orthopantomograms (OPGs). MATERIALS AND METHODS: This study analyses 358 OPGs of 358 patients (mean age, 34...
April 26, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29762448/pectoralis-major-musculocutaneous-flap-with-a-midline-sternal-skin-paddle-for-head-and-neck-reconstruction-a-new-design
#7
Jeongseok Oh, Hee Chang Ahn, Seungki Youn, Kyung Tae
PURPOSE: The pectoralis major musculocutaneous (PMMC) flap is a classic flap for head and neck reconstruction, relatively unpopular with the advancement of microsurgery and free flaps. The classic parasternal paddle design provided a thick flap with a small rotation arch leaving objectionable scarring. Our new symmetric midsternal design overcomes these problems. METHODS: Chart review was done from the years 2000 to 2017. Flap skin paddle was placed symmetrically on both sides of the midsternal line...
May 14, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29762319/comparison-of-bone-grafts-from-various-donor-sites-in-human-bone-specimens
#8
Mohammad Kamal, Felix Gremse, Stefanie Rosenhain, Alexander K Bartella, Frank Hölzle, Peter Kessler, Bernd Lethaus
The objective of the current study was to compare the three-dimensional (3D) morphometric microstructure in human cadaveric bone specimens taken from various commonly utilized donor sites for autogenous bone grafting. Autogenous bone grafts can be harvested from various anatomic sites and express heterogeneous bone quality with a specific 3D microstructure for each site. The long-term structural integrity and susceptibility to resorption of the graft depend on the selected donor bone. Micro-computed tomography generates high-resolution datasets of bone structures and calcifications making this modality versatile for microarchitecture analysis and quantification of the bone...
May 14, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29759652/the-severity-of-denture-stomatitis-as-related-to-risk-factors-and-different-candida-spp
#9
Mirjana Perić, Rade Živković, Aleksandra Milić Lemić, Milena Radunović, Biljana Miličić, Valentina Arsić Arsenijević
OBJECTIVES: 1) To select patients with Candida-related denture stomatitis (DS) and to study possible risk factors associated with DS, 2) to evaluate the severity of DS according to Newton's classification, and 3) to investigate the association between the presence of non-albicans Candida spp. (NAC) or mixed Candida spp. and the severity of DS. STUDY DESIGN: Eighty-two patients with Candida-positive DS have undergone 1) filling in the interview questionnaire, 2) clinical examination, and 3) microbiologic examination...
March 22, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29758255/do-traditional-techniques-produce-better-conventional-complete-dentures-than-simplified-techniques-a-10-year-follow-up-of-a-randomized-clinical-trial
#10
Yasuhiko Kawai, Hiroshi Muarakami, Jocelyne S Feine
OBJECTIVES: The use of a simplified method (S) of fabricating complete dentures has been shown to be more cost-efficient than the traditional method (T), and there are no negative consequences that detract from the cost savings in the short term. However, it is not clear whether this remains constant over a decade. The objective of this study was to clarify patients' perspectives and determine any differences between the dentures fabricated with these two different techniques after a decade of use...
May 11, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29756173/prediction-of-changes-due-to-mandibular-autorotation-following-miniplate-anchored-intrusion-of-maxillary-posterior-teeth-in-open-bite-cases
#11
Hassan E Kassem, Eiman S Marzouk
BACKGROUND: Prediction of the treatment outcome of various orthodontic procedures is an essential part of treatment planning. Using skeletal anchorage for intrusion of posterior teeth is a relatively novel procedure for the treatment of anterior open bite in long-faced subjects. METHODS: Data were analyzed from lateral cephalometric radiographs of a cohort of 28 open bite adult subjects treated with intrusion of the maxillary posterior segment with zygomatic miniplate anchorage...
May 14, 2018: Progress in Orthodontics
https://www.readbyqxmd.com/read/29755527/dentigerous-cystic-changes-in-the-follicles-associated-with-radiographically-normal-impacted-mandibular-third-molars
#12
Ashok Dongol, Alok Sagtani, Mehul Rajesh Jaisani, Arpita Singh, Ashish Shrestha, Anju Pradhan, Pradeep Acharya, Anjani Kumar Yadav, Ram Prasad Yadav, Arun Kumar Mahat, Iccha Kumar Maharjan, Leeza Pradhan
Objective: To assess the incidence of dentigerous cystic changes in the follicles of radiographically normal impacted mandibular third molars. Methods: One hundred and thirteen follicles obtained after surgical removal of impacted mandibular third molars with radiolucency of less than 2.5 mm in the radiograph were sent for histopathologic evaluation to evaluate pathologic changes. Results: The incidence of dentigerous cystic changes observed was 15...
2018: International Journal of Dentistry
https://www.readbyqxmd.com/read/29752604/a-comparative-study-of-the-effect-of-two-dosages-of-submucosal-injection-of-dexamethasone-on-postoperative-discomfort-after-third-molar-surgery-a-prospective-randomized-study
#13
Srimathy S Arora, Tanvi Phull, Ish Kumar, Arun Kumar, Nilesh Kumar, Hem Singh
INTRODUCTION: The aim of this clinical study was to evaluate and compare the relative efficacy of two different dosages of dexamethasone, i.e., 4 and 8 mg injected submucosally to reduce postoperative discomfort after mandibular third molar surgery. METHODOLOGY: A prospective randomized study was conducted on 45 patients requiring surgical removal of an impacted third molar. Selected patients were divided randomly into three groups of 15 patients each: group I patients received one regimen single dose of 4 mg dexamethasone submucosally, group II received one regimen single dose of 8 mg dexamethasone submucosally, and group III (control group), no dexamethasone was given but only received injection of normal saline submucosally after establishing local anesthesia...
May 12, 2018: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29746839/a-treatment-protocol-for-fractures-of-the-edentulous-mandible
#14
Enkh-Orchlon Batbayar, Ruud R M Bos, Baucke van Minnen
PURPOSE: The incidence of fractures of edentulous mandibles is relatively low. Knowledge about the management of these fractured edentulous mandibles relies heavily on case reports and observational studies. On the basis of the current literature, we compiled a treatment protocol for fractures of the edentulous mandible and hypothesized that this protocol would result in fewer complications. PATIENTS AND METHODS: We conducted a retrospective cohort study of edentulous patients with mandibular fractures...
April 14, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29743608/unexpectedly-rapid-evolution-of-mandibular-shape-in-hominins
#15
P Raia, M Boggioni, F Carotenuto, S Castiglione, M Di Febbraro, F Di Vincenzo, M Melchionna, A Mondanaro, A Papini, A Profico, C Serio, A Veneziano, V A Vero, L Rook, C Meloro, G Manzi
Members of the hominins - namely the so-called 'australopiths' and the species of the genus Homo - are known to possess short and deep mandibles and relatively small incisors and canines. It is commonly assumed that this suite of traits evolved in early members of the clade in response to changing environmental conditions and increased consumption of though food items. With the emergence of Homo, the functional meaning of mandible shape variation is thought to have been weakened by technological advancements and (later) by the control over fire...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29742567/erbium-yttrium-aluminum-garnet-laser-versus-traditional-bur-in-the-extraction-of-impacted-mandibular-third-molars-analysis-of-intra-and-postoperative-differences
#16
Ilaria Giovannacci, Giovanna Giunta, Giuseppe Pedrazzi, Marco Meleti, Maddalena Manfredi, Mario Migliario, Matteo Brucoli, Alberta Greco Lucchina, Carmen Mortellaro, Paolo Vescovi
INTRODUCTION: Different osteotomy techniques have been proposed in order to improve postoperative course of impacted third molar extraction. The aim is to evaluate the possible advantages achieved with erbium yttrium-aluminum-garnet (Er:YAG) laser osteotomy compared with traditional burs. MATERIALS AND METHODS: Seventy-six extractions were randomly classified into 2 groups according to osteotomy instrument: group 1 (G1)-Er:YAG laser: 35 patients; group 2 (G2)-traditional bur: 41 patients...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29740337/various-bee-pheromones-binding-affinity-exclusive-chemosensillar-localization-and-key-amino-acid-sites-reveal-the-distinctive-characteristics-of-odorant-binding-protein-11-in-the-eastern-honey-bee-apis-cerana
#17
Xin-Mi Song, Lin-Ya Zhang, Xiao-Bin Fu, Fan Wu, Jing Tan, Hong-Liang Li
Odorant-binding proteins (OBPs) are the critical elements responsible for binding and transporting odors and pheromones in the sensitive olfactory system in insects. Honey bees are representative social insects that have complex odorants and pheromone communication systems relative to solitary insects. Here, we first cloned and characterized OBP11 ( AcerOBP11 ), from the worker bees antennae of Eastern honey bee, Apis cerana . Based on sequence and phylogenetic analysis, most sequences homologous to AcerOBP11 belong to the typical OBPs family...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29738006/the-effect-of-varying-cone-beam-computed-tomography-image-resolution-and-field-of-view-centralization-on-effective-radiation-dose
#18
Fatima M Jadu, Asmaa A Alzahrani, Maha A Almutairi, Salma O Al-Amoudi, Ahmed M Jan, Mawya A Khafaji
To investigate changes in the effective radiation dose (E) in relation to variations in voxel (VOX) size settings and the field-of-view (FOV) centralization. Methods: This cross-sectional dosimetry study used nanoDot OSLD dosimeters placed at 25 pre-determined sites in the head and neck slices of a RANDO male phantom to measure the absorbed radiation. The imaging scans took place at King Abdulaziz University Dental Hospital, Jeddah, Saudi Arabia between September 2016 and May 2017 using the i-CAT classic cone beam computed tomography (CBCT)  unit...
May 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29737530/neuromandibular-integration-in-humans-and-chimpanzees-implications-for-dental-and-mandibular-reduction-in-homo
#19
Alessio Veneziano, Carlo Meloro, Joel D Irish, Chris Stringer, Antonio Profico, Isabelle De Groote
OBJECTIVES: Although the evolution of the hominin masticatory apparatus has been linked to diet and food processing, the physical connection between neurocranium and lower jaw suggests a role of encephalization in the trend of dental and mandibular reduction. Here, the hypothesis that tooth size and mandibular robusticity are influenced by morphological changes in the neurocranium was tested. MATERIALS AND METHODS: Three-dimensional landmarks, alveolar lengths, and mandibular robusticity data were recorded on a sample of chimpanzee and human skulls...
May 8, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29735385/does-lag-screw-fixation-of-condylar-fractures-result-in-adequate-stability-a-finite-element-analysis
#20
Ricardo Augusto Conci, Eleonor Álvaro Garbin, Geraldo Luiz Griza, Natasha Magro Érnica, Pedro Yoshito Noritomi, Flavio Henrique Silveira Tomazi, Guilherme Genehr Fritscher, Claiton Heitz
The great incidence and controversies related to the diagnosis, treatment, surgical accesses, and type of osteosynthesis materials confer an outstanding role to condylar fractures among facial fractures. Plate configurations, with diverse formats and sizes, may be used to surgically resolve condylar fractures. With the purpose of improving the advantages and minimizing the disadvantages of fixation techniques, the neck screw was developed aiming at the needed stabilization to render a correct fixation through a system of dynamic compression...
April 11, 2018: Journal of Cranio-maxillo-facial Surgery
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