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https://www.readbyqxmd.com/read/29775553/influence-of-photobiomodulation-therapy-on-gingivitis-induced-by-multi-bracket-appliances-a-split-mouth-randomized-controlled-trial
#1
Steffen Stein, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVE: The objective of this split-mouth trial was to investigate the influence of photobiomodulation therapy (PBMT) on adjuvant treatment of gingivitis induced by multi-bracket appliances, after bracket debonding and professional tooth cleaning. MATERIALS AND METHODS: Thirteen patients (mean age 16.15 years; standard deviation ±2.12 years) who had completed active orthodontic treatment with fixed orthodontic appliances in an orthodontic clinic were included on a randomized basis...
May 18, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29774424/lingual-and-jaw-kinematic-abnormalities-precede-speech-and-swallowing-impairments-in-als
#2
Bridget J Perry, Rosemary Martino, Yana Yunusova, Emily K Plowman, Jordan R Green
Early identification of bulbar involvement in persons with ALS is critical for improving diagnosis and prognosis; however, efficacious diagnostic markers have not yet been identified. The purpose of this study was to determine whether kinematic changes of the tongue and jaw during swallowing, measured using 3D electromagnetic articulography (EMA), predate clinically identifiable symptoms of speech and swallowing impairment in persons diagnosed with ALS. Data were collected from 16 adults diagnosed with ALS and 18 neurotypical controls...
May 17, 2018: Dysphagia
https://www.readbyqxmd.com/read/29772691/periodontal-tissues-maxillary-jaw-bone-and-tooth-regeneration-approaches-from-animal-models-analyses-to-clinical-applications
#3
REVIEW
Fareeha Batool, Marion Strub, Catherine Petit, Isaac Maximiliano Bugueno, Fabien Bornert, François Clauss, Olivier Huck, Sabine Kuchler-Bopp, Nadia Benkirane-Jessel
This review encompasses different pre-clinical bioengineering approaches for periodontal tissues, maxillary jaw bone, and the entire tooth. Moreover, it sheds light on their potential clinical therapeutic applications in the field of regenerative medicine. Herein, the electrospinning method for the synthesis of polycaprolactone (PCL) membranes, that are capable of mimicking the extracellular matrix (ECM), has been described. Furthermore, their functionalization with cyclosporine A (CsA), bone morphogenetic protein-2 (BMP-2), or anti-inflammatory drugs' nanoreservoirs has been demonstrated to induce a localized and targeted action of these molecules after implantation in the maxillary jaw bone...
May 16, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29771300/evaluation-of-orthodontically-induced-external-root-resorption-following-orthodontic-treatment-using-cone-beam-computed-tomography-cbct-a-systematic-review-and-meta-analysis
#4
Aikaterini Samandara, Spyridon N Papageorgiou, Ioulia Ioannidou-Marathiotou, Smaragda Kavvadia-Tsatala, Moschos A Papadopoulos
Background: Orthodontically induced external root resorption (OIRR) is a pathologic consequence of orthodontic tooth movement. However, the limitations of two-dimensional radiography suggest that cone beam computed tomography (CBCT) with its three-dimensional capabilities might be more suitable to assess OIRR. Objective: The aim of this study was to assess in an evidence-based manner data on linear or volumetric OIRR measurements of permanent teeth by means of CBCT, during and/or after the end of orthodontic treatment...
May 15, 2018: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29769397/larval-thymectomy-of-xenopus-laevis
#5
Sara Mashoof, Breanna Breaux, Michael F Criscitiello
In jawed vertebrates from sharks to mammals, the thymus is the primary (or central) lymphoid tissue where T cells develop and mature. The particular stromal cell types, cytokine environment, and tissue organization in the thymus are essential for V(D)J recombination, positive selection for major histocompatibility complex recognition, and negative selection against self-peptide recognition of most αβ T cells. The thymectomy operation on Xenopus tadpole larva described here creates a T-cell-deficient model suitable for many immunology studies...
May 16, 2018: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/29765689/a-new-archaic-baleen-whale-toipahautea-waitaki-early-late-oligocene-new-zealand-and-the-origins-of-crown-mysticeti
#6
Cheng-Hsiu Tsai, R Ewan Fordyce
A new genus and species of extinct baleen whale † Toipahautea waitaki (Late Oligocene, New Zealand) is based on a skull and associated bones, from the lower Kokoamu Greensand, about 27.5 Ma (local upper Whaingaroan Stage, early Chattian). The upper jaw includes a thin, elongate and apparently toothless maxilla, with evidence of arterial supply for baleen. Open sutures with the premaxilla suggest a flexible (kinetic) upper jaw. The blowhole is well forward. The mandible is bowed laterally and slightly dorsally; unlike the Eomysticetidae, there are no mandibular alveoli, and the coronoid process is tapered and curved laterally...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29765665/morphometric-assessment-of-pterosaur-jaw-disparity
#7
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/29764966/risk-factors-for-intraarticular-heterotopic-bone-formation-in-the-temporomandibular-joint-in-juvenile-idiopathic-arthritis
#8
Matthew L Stoll, Dina Amin, Kathlyn K Powell, Catherine H Poholek, Rachel H Strait, Inmaculada Aban, Timothy Beukelman, Daniel W Young, Randy Q Cron, Peter D Waite
OBJECTIVE: Intraarticular corticosteroid (IAC) injections are often used to treat temporomandibular joint (TMJ) arthritis associated with juvenile idiopathic arthritis (JIA). One potential complication of IA therapy is heterotopic bone formation (HBF). The purpose of our study was to evaluate risk factors for HBF development in children with JIA who received IA therapy for TMJ arthritis. METHODS: This was a retrospective study of children with JIA who had received ≥ 1 IAC injection into the TMJ...
May 15, 2018: Journal of Rheumatology
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
#9
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/29764674/surgical-management-of-patients-with-eagle-syndrome
#10
Frances Mei Hardin, Roy Xiao, Brian B Burkey
OBJECTIVE: Eagle syndrome, a spectrum of disease resulting from an elongated styloid process and/or calcified stylohyoid ligament, lacks standardized recommendations regarding indications for surgical intervention and approach. STUDY DESIGN: Retrospective cohort study. SETTING: Single tertiary care institution. SUBJECTS: Patients treated surgically for Eagle syndrome between January 2011 and June 2017. METHODS: Patients were diagnosed with Eagle syndrome based on thorough clinical workup and assessment...
May 9, 2018: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29764480/a-stepped-approach-for-the-management-of-symptomatic-internal-derangement-of-the-temporomandibular-joint
#11
Candan Efeoglu, Aylin Sipahi Calis, Huseyin Koca, Esra Yuksel
BACKGROUND: Internal derangement is the clinical and pathological condition of disc displacement of the temporomandibular joint. Management of these cases involve conservative and surgical treatment options. Minimally invasive surgical procedures namely arthrocentesis and arthroscopy are promising techniques in the management of internal derangement. However patient selection algorithms, indications for minimally invasive procedures and details of the techniques should be further studied for safe and cost effective management of these cases...
May 15, 2018: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29764474/acute-blindness-as-a-presenting-sign-of-childhood-endemic-burkitt-s-lymphoma-in-cameroon-a-case-report
#12
Brice N Vofo, Gaelle V F Ngankam, Calypse A Ngwasiri, Jeannine A Atem, Leopold N Aminde
BACKGROUND: Endemic Burkitt's lymphoma is found predominantly in malaria holoendemic zones, typically in the tropical rain forest of Africa. It usually presents as an extra-nodal tumour in children and young adults with predilection for jaws and soft tissues of the abdomen. Clinical features depend on the primary tumour site, extent of the disease and histologic subtype. Acute blindness as a presentation sign is rare. CASE PRESENTATION: A 13 year old African female presented to our facility with a 3 week history of painful abdominal distention, and loss of vision of the left eye...
May 16, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29764458/cone-beam-computed-tomography-in-implant-dentistry-recommendations-for-clinical-use
#13
Reinhilde Jacobs, Benjamin Salmon, Marina Codari, Bassam Hassan, Michael M Bornstein
BACKGROUND: In implant dentistry, three-dimensional (3D) imaging can be realised by dental cone beam computed tomography (CBCT), offering volumetric data on jaw bones and teeth with relatively low radiation doses and costs. The latter may explain why the market has been steadily growing since the first dental CBCT system appeared two decades ago. More than 85 different CBCT devices are currently available and this exponential growth has created a gap between scientific evidence and existing CBCT machines...
May 15, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29763348/histological-alterations-from-condyle-repositioning-with-functional-appliances-in-rats
#14
Michiko Nakatsuka, Shunji Kumabe
OBJECTIVE: This study was designed to assess the morphological and histological alterations of the condyle of rats undergoing forward mandibular repositioning via functional appliance. MATERIALS AND METHODS: Functional appliances were mounted onto the upper jaws of rats. Morphological analysis was conducted on micro-CT images of sacrificed animals. Histological changes in condyle were examined by immunohistochemistry using proliferating cell nuclear antigen (PCNA), matrix metalloproteases (MMPs), vascular endothelial growth factor (VEGF), tissue inhibitors of matrix metalloproteinases (TIMP-1), interleukin 1b (IL-1β), Aggrecan and Type II collagen...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29761995/-the-progress-of-research-on-three-dimensional-printed-jaw-scaffolds
#15
REVIEW
Shuaishuai Cao, Miao Zhou
Large defects of jaw caused by tumor, trauma and so on in oral and maxillofacial region lead to facial deformity, language and chewing dysfunction, which severely damage the patient's life quality. Three-dimensional printing (3DP) is also named additive manufacturing (AM), which can print materials layer by layer to create three-dimensional objects. The complex shape of jaw defects can be accurately reconstructed using 3DP scaffold combined with image data, computer-aided-design and manufacture. It has specific advantages compared with traditional way of jaw reconstruction and has attracted much attention in the field of jaw tissue engineering recently...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29761983/-imaging-analysis-of-jaw-defects-reparation-with-antigen-extracted-porcine-cancellous-bone
#16
Xufeng Chen, Lihong Lu, Zhiqiang Feng, Zhongda Yin, Renfa Lai
At present, most of the bone xenograft for clinical application comes from bovine. In recent years, many studies have been done on the clinical application of porcine xenograft bone. The goal of this study was to evaluate the effect of canine mandibular defects reparation with antigen-extracted porcine cancellous bone by imaging examination. Four dogs' bilateral mandibular defects were created, with one side repaired with autologous bone (set as control group) while the other side repaired with antigen-extracted porcine cancellous bone (set as experimental group)...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29761625/beam-focal-spot-position-determination-for-an-elekta-linac-with-the-agility-%C3%A2-head-practical-guide-with-a-ready-to-go-procedure
#17
Jacek M Chojnowski, Lee M Taylor, Jonathan R Sykes, David I Thwaites
A novel phantomless, EPID-based method of measuring the beam focal spot offset of a linear accelerator was proposed and validated for Varian machines. In this method, one set of jaws and the MLC were utilized to form a symmetric field and then a 180o collimator rotation was utilized to determine the radiation isocenter defined by the jaws and the MLC, respectively. The difference between these two isocentres is directly correlated with the beam focal spot offset of the linear accelerator. In the current work, the method has been considered for Elekta linacs...
May 14, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29761534/co-contraction-behavior-of-masticatory-and-neck-muscles-during-tooth-grinding
#18
Nikolaos Nikitas Giannakopoulos, Hans-Jürgen Schindler, Daniel Hellmann
OBJECTIVE: The objective of this study was to analyze the co-contraction behavior of jaw and neck muscles during force-controlled experimental grinding in the supine position. METHODS: Twelve symptom-free subjects were enrolled in the experiment study. Electromyographic (EMG) activity of semispinalis capitis, splenius capitis, and levator scapulae muscles was recorded bilaterally with intramuscular fine-wire electrodes, whereas that of sternocleidomastoideus, infrahyoidal, suprahyoidal, masseter, and anterior temporalis muscles were registered with surface electrodes...
May 14, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29761472/cranial-morphology-in-mollisquama-sp-squaliformes-dalatiidae-and-patterns-of-cranial-evolution-in-dalatiid-sharks
#19
John S S Denton, John G Maisey, Mark Grace, Alan Pradel, Michael H Doosey, Henry L Bart, Gavin J P Naylor
Dalatiid sharks are members of a family of predominantly small, midwater meso- and bathypelagic chondrichthyans. The family is notable for both its number of monotypic genera and high morphological disparity. Three of the seven dalatiid genera are known only from holotype specimens (Mollisquama parini) or from only a handful of specimens (Euprotomicroides zantedeschia, Heteroscymnoides marleyi), with the only detailed anatomical work consistent across all taxa being studies of dentition. Here, we present detailed anatomical description of the second-ever specimen of Mollisquama (Mollisquama sp...
May 14, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29761342/impact-of-oral-hygiene-and-socio-demographic-factors-on-dental-caries-in-a-suburban-population-in-nigeria
#20
T A Oyedele, A D Fadeju, Y I Adeyemo, C L Nzomiwu, A M Ladeji
AIM: This was to determine dental caries determinants in the study participants. METHODOLOGY: This was a secondary data study extracted from primary data through a school-based study that recruited students from primary and secondary schools in a suburban population in Nigeria. The variables included age, gender, socio-economic status, oral hygiene status, type of parenting, birth rank, family size and presence of dental caries. The diagnosis of dental caries was based on the World Health Oral Health Survey recommendations while oral hygiene was determined using simplified-oral hygiene index (OHI-S)...
May 14, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
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