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https://www.readbyqxmd.com/read/28214438/stepwise-dynamics-of-an-anionic-micellar-film-formation-of-crown-lenses
#1
Jongju Lee, Alex Nikolov, Darsh Wasan
We studied the stepwise thinning of a microscopic circular foam film formed from an anionic micellar solution of sodium dodecyl sulfate (SDS). The foam film formed from the SDS micellar solution thins in a stepwise manner by the formation and expansion of a dark spot(s) of one layer less than the film thickness. During the last stages of film thinning (e.g., a film with one micellar layer), the dark spot expansion occurs via two steps. Initially, a small dark circular spot inside a film of several microns in size is formed, which expands at a constant rate...
January 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28208057/vertical-alveolar-distraction-osteogenesis-of-the-atrophic-posterior-mandible-before-dental-implant-insertion
#2
Adi Rachmiel, Dekel Shilo, Dror Aizenbud, Omri Emodi
PURPOSE: Augmentation of deficient mandibular posterior alveolar ridges poses a great challenge because of extensive bone deficiency and the presence of the inferior alveolar nerve. This study sets its focus on vertical alveolar distraction osteogenesis (ADO) at the posterior mandible before dental implant placement. MATERIALS AND METHODS: The study included 21 sites in 18 patients with severe mandibular posterior alveolar ridge deficiency. A trapezoidal osteotomy was performed, and an extraosseous alveolar distraction device was fixed and activated after a 4-day latency period at a rate of 0...
January 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28095517/radiographic-evaluation-of-crestal-bone-level-in-split-crest-and-immediate-implant-placement-minimum-5-year-follow-up
#3
Giovanni B Bruschi, Paolo Capparé, Fabrizio Bravi, Nicola Grande, Enrico Gherlone, Giorgio Gastaldi, Roberto Crespi
PURPOSE: This study aimed to evaluate the radiographic bone level changes of implants positioned via the split-crest procedure both in the maxilla and mandible at a long-term follow-up. MATERIALS AND METHODS: Seventy-one patients were retrospectively enrolled in the study. The placement of 137 dental implants was performed in the edentulous premolar or molar region after a split-crest ridge expansion procedure. Implants followed a delayed loading protocol. Intraoral digital radiographs were performed at baseline, upon implant placement, at 70 days (following placement of the provisional prosthesis), and on a yearly basis during followup...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28048965/the-developing-stability-of-posterior-mandibular-implants-associated-with-bone-expansion-and-conventional-drilling-techniques
#4
Yen Ting Lin, Adrienne Hong, Ying Chin Peng, Hsiang Hsi Hong
Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using two surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3 bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and twenty-six fixtures in 17 patients were installed using the conventional drilling technique...
January 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/27790575/the-effect-of-ridge-expansion-on-implant-stability-in-narrow-partially-edentulous-ridges-a-preliminary-clinical-study
#5
Latheef Saheb Shaik, Sridhar Meka, Vivekanand Sabanna Kattimani, Srinivas Pandi Chakravarthi, Naga Neelima Devi Kolli, Krishna Prasad Lingamaneni, Susmita Avvaru, Rahul Tiwari
INTRODUCTION: Currently, dental treatments with better aesthetic results and less treatment time is more acceptable by the patients. Inadequate amount of bone for implant placement at functionally and aesthetically most appropriate position is a common problem. AIM: To assess the effect of ridge expansion on implant stability in narrow partially edentulous ridges and to evaluate clinically and radiographically the success of dental implants, placed immediately following ridge expansion procedure...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27755447/lateral-ridge-splitting-expansion-with-immediate-placement-of-endosseous-dental-implant-using-piezoelectric-device-a-new-treatment-protocol
#6
Firas A Jamil, Sahar Shakir Al-Adili
Many treatment modalities have been introduced for correction of deficient alveolar ridge width. Bone expansion through the ridge split procedure is one of them. This technique was initiated in order to overcome many problems that usually associated with grafting procedures. The present study evaluated the effectiveness of piezoelectric device in performing ridge split using single-stage approach and assessed the outcomes during a period of about 4 months after surgery. A total of 23 patients ages in range between 18 and 60 years underwent ridge split procedure with immediate insertion of dental implants...
October 14, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27740654/extraction-socket-management-with-buccal-plate-expansion-preliminary-results-of-a-novel-technique
#7
Alberto Fernandez Ayora, Oscar González-Martín, Eric Rompen, Geoffrey Lecloux, France Lambert
The primary objective of this pilot study was to evaluate a new socket preservation technique involving the intentional expansion of the extraction socket buccal plate using a flapless internal corticotomy and biomaterials. A total of 11 patients requiring tooth extraction were enrolled in this study. The aim of this technique was to maintain or improve the hard and soft tissue contour of the ridge after tooth extraction. All surgical sites healed uneventfully. Significant alveolar bone dimension changes were observed in the coronal region of the ridge (-1...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27732624/mitochondrial-dna-analyses-indicate-high-diversity-expansive-population-growth-and-high-genetic-connectivity-of-vent-copepods-dirivultidae-across-different-oceans
#8
Sabine Gollner, Heiko Stuckas, Terue C Kihara, Stefan Laurent, Sahar Kodami, Pedro Martinez Arbizu
Communities in spatially fragmented deep-sea hydrothermal vents rich in polymetallic sulfides could soon face major disturbance events due to deep-sea mineral mining, such that unraveling patterns of gene flow between hydrothermal vent populations will be an important step in the development of conservation policies. Indeed, the time required by deep-sea populations to recover following habitat perturbations depends both on the direction of gene flow and the number of migrants available for re-colonization after disturbance...
2016: PloS One
https://www.readbyqxmd.com/read/27614891/review-cornification-morphogenesis-and-evolution-of-feathers
#9
Lorenzo Alibardi
Feathers are corneous microramifications of variable complexity derived from the morphogenesis of barb ridges. Histological and ultrastructural analyses on developing and regenerating feathers clarify the three-dimensional organization of cells in barb ridges. Feather cells derive from folds of the embryonic epithelium of feather germs from which barb/barbule cells and supportive cells organize in a branching structure. The following degeneration of supportive cells allows the separation of barbule cells which are made of corneous beta-proteins and of lower amounts of intermediate filament (IF)(alpha) keratins, histidine-rich proteins, and corneous proteins of the epidermal differentiation complex...
September 10, 2016: Protoplasma
https://www.readbyqxmd.com/read/27583046/immediate-dental-implant-placements-using-osteotome-technique-a-case-report-and-literature-review
#10
Saad Al-Almaie
This clinical case describes the effect of the osteotome technique on the osseointegration of a mandibular dental implant in a 42-year-old female patient with dento-alveolar bony defects and to review the literature regarding immediate implant placement using osteotome technique. The amount of bone expansion at the alveolar ridge and the marginal bone resorption from the time of implant placement to one year after the implant's functional loading were recorded clinically. The esthetic outcome for the restored implant (the gingival margin) was achieved one years after the implant's functional loading...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27564070/piezosurgery-for-excision-of-large-osteoid-osteoma
#11
Pushkar Gadre, Divya Singh, Kiran Gadre, Imran Khan
Osteoid osteoma, a rare benign osteoblastic tumor first described by Jaffe in 1935, is characterized as a small but painful lesion that mostly affects younger people. Usually benign and harmless, osteomas are removed for pain or esthetic reasons.Piezoelectric surgery is also increasingly being used effectively in major and minor osseous oral and maxillofacial surgeries, in delicate areas. It is used regularly for various procedures, including sinus lift procedures, bone graft harvesting, osteogenic distraction, ridge expansion, inferior alveolar nerve decompression and lateralization, cyst removal, dental extraction, and impacted tooth removal...
October 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27516856/evolutionary-potential-in-the-alpine-trait-heritabilities-and-performance-variation-of-the-dwarf-willow-salix-herbacea-from-different-elevations-and-microhabitats
#12
Janosch Sedlacek, Andrés J Cortés, Julia Wheeler, Oliver Bossdorf, Guenter Hoch, Jaroslav Klápště, Christian Lexer, Christian Rixen, Sonja Wipf, Sophie Karrenberg, Mark van Kleunen
Alpine ecosystems are seriously threatened by climate change. One of the key mechanisms by which plants can adapt to changing environmental conditions is through evolutionary change. However, we still know little about the evolutionary potential in wild populations of long-lived alpine plants. Here, we investigated heritabilities of phenological traits, leaf size, and performance traits in natural populations of the long-lived alpine dwarf shrub Salix herbacea using relatedness estimates inferred from SSR (Simple Sequence Repeat) markers...
June 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27456826/sea-ice-and-millennial-scale-climate-variability-in-the-nordic-seas-90%C3%A2-kyr-ago-to-present
#13
Ulrike Hoff, Tine L Rasmussen, Ruediger Stein, Mohamed M Ezat, Kirsten Fahl
In the light of rapidly diminishing sea ice cover in the Arctic during the present atmospheric warming, it is imperative to study the distribution of sea ice in the past in relation to rapid climate change. Here we focus on glacial millennial-scale climatic events (Dansgaard/Oeschger events) using the sea ice proxy IP25 in combination with phytoplankton proxy data and quantification of diatom species in a record from the southeast Norwegian Sea. We demonstrate that expansion and retreat of sea ice varies consistently in pace with the rapid climate changes 90 kyr ago to present...
2016: Nature Communications
https://www.readbyqxmd.com/read/27437584/a-somitic-contribution-to-the-apical-ectodermal-ridge-is-essential-for-fin-formation
#14
Wouter Masselink, Nicholas J Cole, Fruzsina Fenyes, Silke Berger, Carmen Sonntag, Alasdair Wood, Phong D Nguyen, Naomi Cohen, Franziska Knopf, Gilbert Weidinger, Thomas E Hall, Peter D Currie
The transition from fins to limbs was an important terrestrial adaptation, but how this crucial evolutionary shift arose developmentally is unknown. Current models focus on the distinct roles of the apical ectodermal ridge (AER) and the signaling molecules that it secretes during limb and fin outgrowth. In contrast to the limb AER, the AER of the fin rapidly transitions into the apical fold and in the process shuts off AER-derived signals that stimulate proliferation of the precursors of the appendicular skeleton...
July 28, 2016: Nature
https://www.readbyqxmd.com/read/27349192/expansion-of-mandibular-knife-edge-ridge-and-simultaneous-implant-placement-to-retain-overdentures-one-year-clinical-and-radiographic-results-of-a-prospective-study
#15
Moustafa Abdou ELsyad, Nelly Ibrahim Hammouda
PURPOSE: The aim of this study was to evaluate and compare the clinical and radiographic outcomes of two implants placed in expanded mandibular knife-edge ridge and implants placed in unexpanded ridges to retain overdentures. MATERIALS AND METHODS: Fifteen completely edentulous patients with knife-edge ridges at canine areas of the mandible received two implants using the ridge expansion technique (study group, SG). Expansion was performed using piezoelectric corticotomy, and self-threading expanders...
February 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/27185293/theory-of-the-development-of-curved-barbs-and-their-effects-on-feather-morphology
#16
Teresa J Feo, Emma Simon, Richard O Prum
Feathers exhibit an extraordinary diversity of shapes, which are used by birds to accomplish a diverse set of functions. Pennaceous feathers have a double branched morphology that develops from a tube of epidermis, and variation in branch geometry determines feather shape. Feather development is both complex (i.e., a simple developmental modification can have multiple effects on mature feather shape), and redundant (i.e., different developmental modifications can create the same shape). Due to this, it is not readily apparent how different feather shapes develop...
August 2016: Journal of Morphology
https://www.readbyqxmd.com/read/27183077/lateral-alveolar-ridge-expansion-in-the-anterior-maxilla-using-piezoelectric-surgery-for-immediate-implant-placement
#17
Vinh Giap Nguyen, Nadine von Krockow, Paul Weigl, Rita Depprich
PURPOSE: The purpose of this study was to evaluate the efficacy of the ridge-splitting technique in the anterior maxilla, using piezoelectric surgery for immediate implant placement. Study outcomes were compared with those of implant placement in the same patients using the conventional drilling technique. MATERIALS AND METHODS: Ten patients received a total of 22 implants in the anterior maxilla, 11 of which were placed using a ridge-splitting procedure (test group) and the other 11 using the conventional drilling procedure (control group)...
May 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27183068/long-term-survival-rates-of-titanium-implants-placed-in-expanded-alveolar-ridges-using-split-crest-procedures-a-systematic-review
#18
Gianfranco Mestas, Marco Alarcón, Leandro Chambrone
PURPOSE: To evaluate the survival rates of titanium dental implants placed using split crest procedures for alveolar ridge expansion. MATERIALS AND METHODS: The MEDLINE, CENTRAL, and OpenGrey databases were searched up to January 2015 for studies assessing implants that had been placed in areas submitted to split crest procedures. Two methodologic quality-assessment tools were used based on the type of study. For randomized controlled trials (RCTs), the Cochrane Collaboration tool was used to assess the risk of bias...
May 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27092118/nanocalorimetric-characterization-of-microbial-activity-in-deep-subsurface-oceanic-crustal-fluids
#19
Alberto Robador, Douglas E LaRowe, Sean P Jungbluth, Huei-Ting Lin, Michael S Rappé, Kenneth H Nealson, Jan P Amend
Although fluids within the upper oceanic basaltic crust harbor a substantial fraction of the total prokaryotic cells on Earth, the energy needs of this microbial population are unknown. In this study, a nanocalorimeter (sensitivity down to 1.2 nW ml(-1)) was used to measure the enthalpy of microbially catalyzed reactions as a function of temperature in samples from two distinct crustal fluid aquifers. Microorganisms in unamended, warm (63°C) and geochemically altered anoxic fluids taken from 292 meters sub-basement (msb) near the Juan de Fuca Ridge produced 267...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27051876/trends-in-atmospheric-patterns-conducive-to-seasonal-precipitation-and-temperature-extremes-in-california
#20
Daniel L Swain, Daniel E Horton, Deepti Singh, Noah S Diffenbaugh
Recent evidence suggests that changes in atmospheric circulation have altered the probability of extreme climate events in the Northern Hemisphere. We investigate northeastern Pacific atmospheric circulation patterns that have historically (1949-2015) been associated with cool-season (October-May) precipitation and temperature extremes in California. We identify changes in occurrence of atmospheric circulation patterns by measuring the similarity of the cool-season atmospheric configuration that occurred in each year of the 1949-2015 period with the configuration that occurred during each of the five driest, wettest, warmest, and coolest years...
April 2016: Science Advances
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