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https://www.readbyqxmd.com/read/28641822/interim-rehabilitation-of-occlusal-vertical-dimension-using-a-double-crown-retained-removable-dental-prosthesis-with-polyetheretherketone-framework
#1
Sebastian Hahnel, Christian Scherl, Martin Rosentritt
Polyetheretherketone (PEEK) is a polymeric material that has recently been introduced in dentistry and can be used as framework material for fixed and removable dental prostheses. This clinical report describes the fabrication of a double-crown-retained prosthesis with a PEEK framework in a patient with a substantially diminished occlusal vertical dimension. The insertion of the removable dental prosthesis with a PEEK framework resulted in the functional and esthetic rehabilitation of the patient; however, removable dental prostheses fabricated from PEEK should currently be regarded as interim restorations because of the limited available scientific evidence...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28639686/tempor%C3%A3-re-anhebung-der-vertikaldimension-mit-komposit-in-einem-vereinfachten-direkten-spritzgussverfahren
#2
Jürgen Manhart
The comprehensive dental rehabilitation of complex prosthetic cases is often associated with increasing occlusal vertical dimension and transferring horizontal mandibular position in centric relation. The newly defined position of the mandibula should be functionally and esthetically evaluated for a longer time period before irreversible measures are performed. This case report discusses in detail a time-saving and economic direct method for increasing occlusal vertical dimension with long-term provisional composite restorations using a simplified injection molding technique and illustrates the complete intraoral and laboratory workflow...
2017: Swiss Dental Journal
https://www.readbyqxmd.com/read/28630855/qualitative-correlation-between-postoperatively-increased-vertical-dimension-and-mandibular-position-in-skeletal-class-iii-using-partial-least-square-path-modeling
#3
Na-Ri Kim, Soo-Byung Park, Jihyun Lee, Youn-Kyung Choi, Sang Min Shin, Yong-Seok Choi, Yong-Il Kim
BACKGROUND: This study constructed a partial-least-square path-modeling (PLS-PM) model and found the pathway by which the postsurgical vertical dimension (VD) affects the extent of the final mandibular setback on the B point at the posttreatment stage for the skeletal class III surgery-first approach (SFA). METHODS: This study re-analyzed the data from the retrospective study by Lee et al. on 40 patients with skeletal class III bimaxillary SFA. Variables were obtained from cone beam computed tomography (CBCT)-generated cephalograms...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28630799/optimized-process-for-fabrication-of-free-standing-silicon-nanophotonic-devices
#4
Paul Seidler
A detailed procedure is presented for fabrication of free-standing silicon photonic devices that accurately reproduces design dimensions while minimizing surface roughness. By reducing charging effects during inductively coupled-plasma reactive ion etching, undercutting in small, high-aspect ratio openings is reduced. Slot structures with a width as small as 40 nm and an aspect ratio of 5.5:1 can be produced with a nearly straight, vertical sidewall profile. Subsequent removal of an underlying sacrificial silicon dioxide layer by wet-etching to create free-standing devices is performed under conditions which suppress attack of the silicon...
May 2017: Journal of Vacuum Science and Technology. B, Nanotechnology & Microelectronics: Materials, Processing, Measurement, & Phenomena: JVST B
https://www.readbyqxmd.com/read/28625663/development-of-complete-dentures-based-on-digital-intraoral-impressions-case-report
#5
Jing-Huan Fang, Xueyin An, Seung-Mi Jeong, Byung-Ho Choi
PATIENT: A 60-year-old man presented for refabrication of his maxillary complete denture. In this case, a digital process was chosen to replace the ill-fitted complete maxillary denture. A specialized scan retractor was used to retract the mobile tissues of the lips, cheeks and vestibule while taking a digital impression. The interocclusal record obtained in the patient's mouth was scanned in order to digitally register the occlusal vertical dimension. The denture base and teeth were designed on virtual models that were mounted at the occlusal vertical dimension, and were made using CAD/CAM technology...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28618226/nanotexturing-of-conjugated-polymers-via-one-step-maskless-oxygen-plasma-etching-for-enhanced-tunable-wettability
#6
Youhua Jiang, Jian Xu, Junghoon Lee, Ke Du, Eui-Hyeok Yang, Myoung-Woon Moon, Chang-Hwan Choi
A one-step maskless oxygen plasma etching process is investigated to nanopattern conjugated polymer, dodecylbenzenesulfonate-doped polypyrrole (PPy(DBS)), and to examine the effects of nanostructures on the inherent tunable wettability of the surface and the droplet mobility. Etching characteristics such as the geometry and dimension of the nanostructures are systematically examined for the etching power and duration. The mechanism of self-formation of vertically-aligned dense-array pillared nanostructures in the one-step maskless oxygen plasma etching process is also investigated...
June 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28617335/zno-nano-rod-devices-for-intradermal-delivery-and-immunization
#7
Tapas R Nayak, Hao Wang, Aakansha Pant, Minrui Zheng, Hans Junginger, Wei Jiang Goh, Choon Keong Lee, Shui Zou, Sylvie Alonso, Bertrand Czarny, Gert Storm, Chorng Haur Sow, Chengkuo Lee, Giorgia Pastorin
Intradermal delivery of antigens for vaccination is a very attractive approach since the skin provides a rich network of antigen presenting cells, which aid in stimulating an immune response. Numerous intradermal techniques have been developed to enhance penetration across the skin. However, these methods are invasive and/or affect the skin integrity. Hence, our group has devised zinc oxide (ZnO) nano-rods for non-destructive drug delivery. Chemical vapour deposition was used to fabricate aligned nano-rods on ZnO pre-coated silicon chips...
June 15, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28609492/correlation-of-three-dimensional-radiologic-data-with-subsequent-treatment-approach-in-patients-with-peri-implantitis-a-retrospective-analysis
#8
Philip Bender, Giovanni E Salvi, Daniel Buser, Anton Sculean, Michael M Bornstein
The purpose of this retrospective radiographic study was to evaluate and correlate the dimensions and morphology of peri-implant bone defects as determined via cone beam computed tomography (CBCT) scans with regard to the selected treatment approach. Vertical and horizontal peri-implant bone defects (mesial, distal, mesio-oral, mesiobuccal, disto-oral, distobuccal, oral, and buccal) in peri-implantitis cases were measured. Three-dimensional data and defect morphology were correlated to the treatment approach chosen (explantation versus implant retention)...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28602330/mean-shape-of-the-human-limbus
#9
Alejandra Consejo, Clara Llorens-Quintana, Hema Radhakrishnan, D Robert Iskander
PURPOSE: To characterize the mean topographic shape of the limbus of a normal human eye and determine whether it depends on age or refractive power. SETTING: University of Manchester, Manchester, United Kingdom. DESIGN: Prospective case series. METHODS: Participants with no previous ocular surgeries were included in this study. The left eye was measured with a corneoscleral topographer (Eye Surface Profiler). From the raw anterior eye height data, the topographic limbus was demarcated and fitted in 3 dimensions to a circle, an ellipse, and a Fourier series...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28600914/determination-of-occlusal-vertical-dimension-for-complete-dentures-patients-an-updated-review
#10
REVIEW
Mohammed Nasser Alhajj, Nadia Khalifa, Jaafar Abduo, Abdullah G Amran, Ibrahim A Ismail
Determination of the occlusal vertical dimension (OVD) is an integral part of complete dentures fabrication. Due to the lack of teeth, the clinician faces the challenge of how to accurately establish the OVD of the new denture. Therefore, the purpose of this review article was to present, discuss and critique the available methods used in determining the OVD for complete dentures patients. This review identified two main streams to determine the OVD: (i) pre-extraction methods and (ii) post-extraction methods...
May 18, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28598828/gigantomastia-due-to-retromammary-lipoma-an-aesthetic-management
#11
Sandipan Gupta, Debarati Chattopadhyay, Souradip Gupta, Akhilesh Agarwal, Gautam Guha
INTRODUCTION: A "giant" lipoma is defined as a tumor having dimensions greater than 10 cm. Giant lipomas are rare and giant breast lipomas are exceptionally uncommon. Only six cases have been described in world literature till date. Herein we describe a case of giant breast lipoma and discuss its surgical management. CASE REPORT: A 43-year-old lady presented with left sided unilateral gigantomastia. Clinical examination, radiology and histopathology diagnosed lipoma...
June 2, 2017: Breast Disease
https://www.readbyqxmd.com/read/28590729/synthetic-modularity-of-protein-metal-organic-frameworks
#12
Jake B Bailey, Ling Zhang, Jerika A Chiong, Sunhyung Ahn, F Akif Tezcan
Previously, we adopted the construction principles of metal-organic frameworks (MOFs) to design a 3D crystalline protein lattice in which pseudospherical ferritin nodes decorated on their C3 symmetric vertices with Zn coordination sites were connected via a ditopic benzene-dihydroxamate linker. In this work, we have systematically varied both the metal ions presented at the vertices of the ferritin nodes (Zn(II), Ni(II), and Co(II)) and the synthetic dihydroxamate linkers, which yielded an expanded library of 15 ferritin-MOFs with the expected body-centered (cubic or tetragonal) lattice arrangements...
June 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28588228/photo-acoustic-spectroscopy-revealing-resonant-absorption-of-self-assembled-gaas-based-nanowires
#13
Grigore Leahu, Emilija Petronijevic, Alessandro Belardini, Marco Centini, Roberto Li Voti, Teemu Hakkarainen, Eero Koivusalo, Mircea Guina, Concita Sibilia
III-V semiconductors nanowires (NW) have recently attracted a significant interest for their potential application in the development of high efficiency, highly-integrated photonic devices and in particular for the possibility to integrate direct bandgap materials with silicon-based devices. Here we report the absorbance properties of GaAs-AlGaAs-GaAs core-shell-supershell NWs using photo-acoustic spectroscopy (PAS) measurements in the spectral range from 300 nm to 1100 nm wavelengths. The NWs were fabricated by self-catalyzed growth on Si substrates and their dimensions (length ~5 μm, diameter ~140-150 nm) allow for the coupling of the incident light to the guided modes in near-infrared (IR) part of the spectrum...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28583281/a-fundamental-experimental-approach-for-optimal-design-of-speed-bumps
#14
A Hakan Lav, Ertugrul Bilgin, A Hilmi Lav
Speed bumps and humps are utilized as means of calming traffic and controlling vehicular speed. Needleless to say, bumps and humps of large dimensions in length and width force drivers to significantly reduce their driving speeds so as to avoid significant vehicle vertical acceleration. It is thus that this experimental study was conducted with the aim of determining a speed bump design that performs optimally when leading drivers to reduce the speed of their vehicles to safe levels. The first step of the investigation starts off by considering the following question: "What is the optimal design of a speed bump that will - at the same time - reduce the velocity of an incoming vehicle significantly and to a speed that resulting vertical acceleration does not jeopardize road safety? The experiment has been designed to study the dependent variables and collect data in order to propose an optimal design for a speed bump...
June 2, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28583229/landmarks-for-rapid-localization-of-the-sphenopalatine-foramen-a-radiographic-morphometric-analysis
#15
Anne K Maxwell, Henry P Barham, Anne E Getz, Todd T Kingdom, Vijay R Ramakrishnan
BACKGROUND: Transnasal endoscopic sphenopalatine artery ligation is becoming the procedure of choice for surgical management of intractable posterior epistaxis. Landmarks for localization of the sphenopalatine foramen can assist in rapid surgical exposure of the sphenopalatine artery. OBJECTIVE: This study examined distances from easily identified endoscopic surgical landmarks to the sphenopalatine foramen. METHODS: By using computed tomography of the sinus to study radiologic anatomy in 50 adults, distances were measured between five simple endoscopic landmarks and the sphenopalatine foramen...
June 1, 2017: Allergy & Rhinology
https://www.readbyqxmd.com/read/28579287/effect-of-1-or-2-level-posterior-lumbar-interbody-fusion-on-global-sagittal-balance
#16
Jae Hwan Cho, Youn-Suk Joo, Cheongsu Lim, Chang Ju Hwang, Dong-Ho Lee, Choon Sung Lee
BACKGROUND CONTEXT: Sagittal imbalance is associated with poor clinical outcomes in patients with degenerative lumbar disease. However, there is no consensus on the impact of posterior lumbar interbody fusion (PLIF) on local and global sagittal balance. PURPOSE: To reveal the effect of 1- or 2-level PLIF on global sagittal balance. STUDY DESIGN/SETTING: A retrospective case-control study. PATIENTS SAMPLE: This study included 88 patients who underwent a 1- or 2-level PLIF for spinal stenosis with spondylolisthesis...
June 1, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28577371/prevalence-of-torus-mandibularis-in-young-healthy-dentate-adults
#17
Koji Morita, Hiroki Tsuka, Tomoaki Shintani, Mitsuyoshi Yoshida, Hidemi Kurihara, Kazuhiro Tsuga
PURPOSE: There have been only a few reports on the prevalence of torus mandibularis (TM) in young adult patients, and TM can have various adverse effects on oral and occlusal states in middle-age patients. This study was designed to determine the association between TM status and oral and occlusal states in young healthy dentate adults. MATERIALS AND METHODS: This was a cross-sectional study; the sample population included students at Hiroshima University (Hiroshima, Japan) who participated for practical education...
May 10, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28567529/influence-of-a-face-bow-on-oral-health-related-quality-of-life-after-changing-the-vertical-dimension-in-the-articulator-a-randomized-controlled-trial-part-ii
#18
Manja von Stein-Lausnitz, Steffen Schmid, Felix H Blankenstein, Ingrid Peroz, Florian Beuer, Guido Sterzenbach
OBJECTIVES: In a double-blind randomized controlled clinical trial, the impact of face-bow registration for remounting complete dentures (CDs) on oral health-related quality of life (OHRQoL) was evaluated. MATERIALS AND METHODS: New CDs of 32 subjects were clinically remounted using intraoral pin registration. CDs were transferred into a semi-adjustable articulator corresponding to group #1: mean settings with Bonwill triangle and Balkwill angle, and group #2: arbitrary hinge axis with a face-bow registration...
May 31, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28567428/acl-roof-impingement-revisited-does-the-independent-femoral-drilling-technique-avoid-roof-impingement-with-anteriorly-placed-tibial-tunnels
#19
John A Tanksley, Brian C Werner, Evan J Conte, David P Lustenberger, M Tyrrell Burrus, Stephen F Brockmeier, F Winston Gwathmey, Mark D Miller
BACKGROUND: Anatomic femoral tunnel placement for single-bundle anterior cruciate ligament (ACL) reconstruction is now well accepted. The ideal location for the tibial tunnel has not been studied extensively, although some biomechanical and clinical studies suggest that placement of the tibial tunnel in the anterior part of the ACL tibial attachment site may be desirable. However, the concern for intercondylar roof impingement has tempered enthusiasm for anterior tibial tunnel placement...
May 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28566855/assessment-of-bracket-surface-morphology-and-dimensional-change
#20
Pillai Devu Radhakrishnan, N K Sapna Varma, V V Ajith
OBJECTIVE: The objective of this study was to compare the surface morphology and dimensional stability of the bracket slot at the onset of treatment and after 12 months of intraoral exposure. The study also compared the amount of calcium at the bracket base which indicates enamel loss among the three orthodontic brackets following debonding after 12 months of intraoral exposure. MATERIALS AND METHODS: The sample consisted of 60 (0.022" MBT) canine brackets. They were divided into three groups: self-ligating, ceramic bracket with metal slot, and stainless steel (SS) brackets...
January 2017: Contemporary Clinical Dentistry
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