In vitro models of soft tissue damage by implant-associated frictional shear stresses

Silicone elastomer medical implants are ubiquitous in medicine, particularly for breast augmentation. However, when these devices are placed within the body, disruption of the natural biological interfaces occurs, which significantly changes the native energy-dissipation mechanisms of living systems. These new interfaces can introduce non-physiological contact pressures and tribological conditions that provoke inflammation and soft tissue damage. Despite their significance, the biotribological properties of implant-tissue and implant-extracellular matrix (ECM) interfaces remain poorly understood. Here, we developed an in vitro model of soft tissue damage using a custom-built in situ biotribometer mounted onto a confocal microscope. Sections of commercially-available silicone breast implants with distinct and clinically relevant surface roughness (Ra = 0.2 ± 0.03 μm, 2.7 ± 0.6 μm, and 32 ± 7.0 μm) were mounted to spherically-capped hydrogel probes and slid against collagen-coated hydrogel surfaces as well as healthy breast epithelial (MCF10A) cell monolayers to model implant-ECM and implant-tissue interfaces. In contrast to the “smooth” silicone implants (Ra &lt; 10 μm), we demonstrate that the “microtextured” silicone implant (10 &lt; Ra &lt; 50 μm) induced higher frictional shear stress (τ &gt; 100 Pa), which led to greater collagen removal and cell rupture/delamination. Our studies may provide insights into post-implantation tribological interactions between silicone breast implants and soft tissues.</p

The Grizzly, December 9, 2010

UC Performing Arts to Come Together • Conflux Festival Allows for Innovative Technology • UCompost Continues to Help Create Change on Campus • Breakthroughs in Science Bring New Insight • UC Students Embrace Gaming and Some Late Night Fun • Clarifying the Calamity of Clamer Hall Renovations • Local Holiday Light Displays Worth Checking Out • Banning of Four Loko May Not Bring Change • Internship Profile: Inki Hong • Opinion: Korean War Could Cause International Problems; Review of the Diversity Monologues • Men\u27s Basketball Looks to Grow Throughout Season • Indoor Track and Field Begins Seasonhttps://digitalcommons.ursinus.edu/grizzlynews/1826/thumbnail.jp

The Grizzly, February 4, 2010

The Brandon Kamin Show Premieres • Students Leading Haiti Relief Initiatives • Berman Premieres Min(d)ing the Landscape Exhibit • Ursinus Alumnus, J. D. Salinger, Dies • TCE Air Monitoring: Ursinus Student Research with the DEP • Learning to Learn: Choosing Majors and Finding a Path at Ursinus College • Opinion: Student Perceptions of CIE: What do Students Take from Course? • Ursinus Men\u27s Rugby Looking Forward to 2010https://digitalcommons.ursinus.edu/grizzlynews/1804/thumbnail.jp

The Lantern, 2012-2013

• How They Run • What Was Said in Boston • On the Last Day of the Month • An Angel Tries to Surprise Humans • I Wonder if God Modeled Boys After Books • Marred with Modern Scars • Feather Bed • Ode to a Pen • Objet Petit A • Breaking News: Grownups Fear Return of Disco • Neuroscience • New Document • We Were Stars, and the Sky was Our Grass • About a Man • Trojan • An Ode • Yr Body Sour • That Lake in Jamaica • Live While Chiefs are Still Fighting • Lament for Mathematics • The Robert Frost House • People Fell in Love on Me • Sunday Review • Looks Silly in Tiny Desk Chairs • Two Years Later • Better Than Nothing • Istanbul • Packs of Cigarettes • Sonnet • Outside King of Steaks • Obstinance • Coffee Grinds • Autumn Equinox • Homecoming • Oh, San Francisco • Slide: A Beginning • Slowly Last Summer • Of Dogs and Men • Letters Not Sent • Before the Race • The Little Things • Tarpon Springs • Payment for Rebellion • Wednesday • When is President\u27s Day? • Heartless Parallels and Perpendiculars • Railway • Presto Agitato • Easier Said Than Done • Waves • Four White Women • Rope • Alter Ego Self Portrait • Pebbles • Coney Island • Guanjuanto • Growth • Evolve • Winter Blackout • Honeybee • Frames • Wanderlust • Guiding Light 1 • Frick\u27s Lock • The Ones That Never Leave • In Memoriam: Rachel Blunthttps://digitalcommons.ursinus.edu/lantern/1179/thumbnail.jp

The Lantern, 2010-2011

• The Graterford Department of Corrections • Visiting Room: Lewis Considers the Space & Time Continuum • String • The Tale of Lad Wadley • The Devout • One Moment in the Garden • Water, Focused and Tumbling • Bomber • Another • I Walked Home • Perhe • I Describe the Last Time My Parents Had Sex • Butterflies • Ship Without Fools • The Interview • Cyane • An Imaginary Portrait of Stella as a Young Girl • At the Farm Market in Early Autumn • Victor Jorgenson\u27s Photograph of the V-J Day Kiss • Lightning • The Citadel • Whenever You Come Home From School • It Came in a Dream • What I Know About Fission • Please Don\u27t Fire Me for Saying Such Things • Femina Irata • Thank You For Shopping • Sunday, November 27th • An Introduction to The Lifestyle • Laid-Off Perception • Good-Night, Sweet Prince • Requiem for a Marriage • Gertrude\u27s Book • Passing • Elk Run II • Shady Tides • A Quiet House • Tell Him. A Manual • Silence • Google This • The Dinner Table Dance • The Inevitable Extinction of Filing Cabinets • Chateau d\u27If • Man Smoking in Charcoal • Inside Auschwitz • Bark Glow • Anticipation • Look Up • Major News Networks • Others Wage War • Insert Bible Verse Here • The Empress • Candy Castle • Venice, Italy • Quebec • Bhutanese Child • Jumper • Pomegranates • Cover Image: Octopus Hathttps://digitalcommons.ursinus.edu/lantern/1176/thumbnail.jp

The Lantern, 2011-2012

• Frangipani • A Shadow • Dear Anne, In this Place, Stringbean Girls • Back to a Dandelion • How to Plant a Room • Swimming Pool Poem 30 • The Naming of Daughters • Berman Museum Photographs • Truth or Dare • The Song of Remembrance, L\u27vov, Poland, 1940 • Headlights • Prayer of Thanks • Numbers Game • Pediment • Home Sick • Lust • Sand Lining Instructions • A-A-Ask a Question • Flash Cards • Columbus Day • Mr. Yoest Gives His Report to the Police Officers on Wednesday Night • Gender Trouble • The Internet Connection at Ursinus College • Assuming You\u27ll Still be Here • 10/28/11, Third Poem • October • Actions that Affirm and Confirm Us as a Community • Why I Hate The Lantern • Confessions of an Ex-Vegetarian • Run • Lunch at Caltort • Schemers • You Will Make Beautiful Babies in America • The Black Dirt Region • Il Travatore • Ghost Story • Blue Eyes and Sunny Skies • A Little Sincerity • The Bookstore • The Opposite of Serendipity • The Human Doll • Evil Deeds • Francesca • Sunday Morning • Jersey Aesthetic • Jump! • Behind Reimert • Seaweed in New Zealand • Tombee de L\u27elegance • The Window • Esperando • Rainbow to the Heavens • Encased • In Springtime • A Fiesolan Monk\u27s Room • Inside a Bone • Neon Indian • Moments of Clarity • OneFeral: A Feral Self-Portrait • Cover Image: The Conquerorhttps://digitalcommons.ursinus.edu/lantern/1177/thumbnail.jp

Search for anomalous t t-bar production in the highly-boosted all-hadronic final state

A search is presented for a massive particle, generically referred to as a Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall--Sundrum Kaluza--Klein gluon. In addition, the results constrain any enhancement in t t-bar production beyond expectations of the standard model for t t-bar invariant masses larger than 1 TeV.Comment: Submitted to the Journal of High Energy Physics; this version includes a minor typo correction that will be submitted as an erratu

The Lantern, 2009-2010

• I\u27m Pregnant. It\u27s Yours • The Nightmare • What Death Became After Cyparissus • Substances • Ain\u27t That a Man? • Portrait • The 100th Chemo • Looking into Her Toy Box with a Lover • They Used to Talk About Burning Cities • MESSAGE: Absence for Allen Ginsberg • Lunch with Candide • Behold! Man of Unbelief! Behold! • Dream #1 Final Strophe • Patience (Things You Will Discover) • Four Years • He Falls Like Leaves • The Quilt • Ariel (Turning Tricks at Fisherman\u27s Wharf, Monterey, California) • Extranjera • The Taste of Morning • Fear of Glory • The Rum Bottle\u27s Fortune • While Thinking of What to Write • Dying in Spring • Tutte le Eta di Firenze • Token • A House Grows Into Itself • Gravity • Father with the Skyy • He Says He Dreams of Me • Myth • Sun-Veins and Wishbones • Attempts at Bravery • One Boy in Four Parts • Blacktop Rollin\u27 • Getting My Feet Wet • The Long Ride After Ending • Wet Tongues and Sweaty Cotton • Norman Bates is My Mother • Sims Trek • Tomorrow Comes Today • The Writer\u27s Process • This Too Was Real • Venus from the Waves • Shark • Monday\u27s Expectations • Recognition • The Black Shoes • Climax • Andrew • Bottles • Calle de Cusco • God in the Machine • The 26th of December • Lollipop Lollipop • When Dinosaurs Roamed the Earth • Meaning • Jeffrey • Looking • Jagged Edges • Fading Storm • Shoes • Cover Image: Death by Chocolatehttps://digitalcommons.ursinus.edu/lantern/1175/thumbnail.jp