Hüftgelenksendoprothetik: Aktueller Stand -- Perspektiven
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Die normale Beanspruchung des koxalen Femurendes ist eine Biegebeanspru- chung, die ein charakteristisches Muster der VerUiufe der Normalspannungstrajek- torien und eine Schubbeanspruchung im Querschnitt des Schenkelhalses zur Folge hat. Wird der Schenkelhals bei Implantation einer Endoprothese rechtwinklig zur Halsachse reseziert, so wirkt an der Resektionsebene eine Schubkraft. Die Prothese selbst erfahrt ein Kippmoment. Besonders hohe Beanspruchung tritt dabei an der Medialwand des Schenkelhalsstumpfes auf. An seiner Lateralwand konnen Zug- spannungen nur bei einzementierten Prothesen und bei guter Haftung des Zements am Knochen auftreten. Anderenfalls, auch bei Lockerung zementierter Prothesen, kommt es durch Oberlastung zu Knochenresorption am medialen Auflager und an der Abstiitzung des Prothesenstiels an der lateralen Diaphysenwand, und zu ent- sprechender Kippbewegung des Implantats. Isoelastische Prothesen bieten theoretisch im Idealfall deutliche Vorteile, sind aber in der geforderten Weise technisch nicht realisierbar. Die valgische Aufrichtung der implantierten Prothese konnte die Beanspru- chungsverhaltnisse im Bereich der Resektionsebene des Schenkelhalses erheblich giinstiger gestalten. Dieser Vorteil wird jedoch durch eine etwas ungiinstigere Gelenksresultierende und durch eine Biegebeanspruchung der Medialwand des Schenkelhalsstumpfes beeintrachtigt. Literatur Kummer B (1956) Eine vereinfachte Methode zur Darstellung von Spannungstrajektorien, gleich- zeitig ein Modellversuch fUr die Ausrichtung und Dichteverteilung der Spongiosa in den Gelenk- enden der Rohrenknochen. (Achter Beitrag zur funktionellen Anatomie und kausalen Morpho- logie des Stiitzapparates von Friedrich Pauwels). Z Anat Entwicklungsgesch 119: pp223-234 Kummer B (1959) Bauprinzipien des Siiugerskelettes. Thieme, Stuttgart Kummer B (1968) Die Beanspruchung des menschlichen Hiiftgelenks. I. Allgemeine Problematik.
• Author(s): Clear | James • Publisher: Penguin • Publisher Imprint: Penguin Random House • Subject: General Books
• Author(s): Jeff Kinney • Publisher: Penguin Random House Children's UK • Publisher Imprint: Penguin Random House Children's UK • BISAC: Comics & Graphic Novels - Humorous
• Author(s): Ichiro Kishimi • Publisher: GROVE ATLANTIC • Publisher Imprint: Allen & Unwin • BISAC: Personal Growth - SuccessIchiro Kishimi lives in Kyoto. He writes, lectures and teaches in psychiatric clinics as a certified counsellor and c...
View full details• Author(s): Chetan Bhagat • Publisher: HarperCollins Publishers India • Publisher Imprint: HarperCollins Publishers India • BISAC: GeneralFrom India's top-selling writer Chetan Bhagat comes a powerful new love story that will make you laugh, cry...
View full details• Author(s): Brianna Wiest • Publisher: Manjul Publishing • Publisher Imprint: Amaryllis • BISAC: Body Mind And SpiritThis is a book about self-sabotage. Why we do it, when we do it, and how to stop doing it—for good. Coexisting but conflicting n...
View full details• Author(s): Morgan Housel • Publisher: Pan Macmillan • Publisher Imprint: Pan Macmillan • BISAC: Finance - Wealth ManagementA third book from the International bestselling author of The Psychology of Money and Same as Ever, lessons on harnessing...
View full details• Author(s): Arundhati Roy• Publisher: PRH INDIA LOCAL PRINT• Publisher Imprint: Penguin Hamish Hamilton• BISAC: Literary FiguresArundhati Roy’s first work of memoir, this is a soaring account, both intimate and inspiring, of how the author became...
View full details• Author(s): Acharya Prashant • Publisher: HarperCollins Publishers India • Publisher Imprint: HarperCollins Publishers India • BISAC: GeneralIn a world where vagueness is mistaken for depth and obscurity passes for wisdom, Truth without Apology ...
View full details• Author(s): Sudha Murthy • Publisher: India Puffin • Publisher Imprint: India Puffin • BISAC: Short StoriesWho can resist a good story, especially when it's being told by Grandma? From her bag emerges tales of kings and cheats, monkeys and mic...
View full details• Author(s): Satoshi Yagisawa • Publisher: Bonnier Books Ltd • Publisher Imprint: Bonnier Books Ltd
• Author(s): Newport, Cal • Publisher: Little, Brown Book Group • Publisher Imprint: Piatkus
• Author(s): Shrijeet Shandilya • Publisher: Ebury Press • Publisher Imprint: Ebury Press • BISAC: Romance - GeneralIn the electric haze of college life, three friends are bound by laughter, late-night talks and unspoken promises. But when two of...
View full details• Author(s): Dan Brown • Publisher: Transworld Publishers Ltd • Publisher Imprint: Transworld Publishers Ltd • BISAC: Thrillers - EspionageDan Brown is the bestselling author of Digital Fortress, Deception Point, Angels and Demons, The Da Vinci C...
View full details• Author(s): Sudha Murty • Publisher: India Puffin • Publisher Imprint: India Puffin • BISAC: Action & Adventure - General
Rich Dad Poor Dad: What the Rich Teach Their Kids about Money That the Poor and Middle Class Do Not!
• Publisher: Penguin • Publisher Imprint: Penguin Random House • Subject: General Books • BISAC: Personal Finance - GeneralApril of 2022 marks a 25-year milestone for the personal finance classic Rich Dad Poor Dad that still ranks as the #1 Pers...
View full details• Author(s): Dale Carnegie | Napoleon Hill • Publisher: Fingerprint • Publisher Imprint: Fingerprint • Subject: General Books
• Author(s): Freida Mcfadden • Publisher: Penguin Select Print • Publisher Imprint: Penguin Select Publishing"Multi-Million Copy Bestselling Series •Now Being Made Into a Major Motion Picture Starring Sydney Sweeney and Amanda Seyfried #1 New Yor...
View full details• Author(s): Wonder House Books • Publisher: Wonder House Books • Publisher Imprint: Wonder House Books • BISAC: Comics & Graphic Novels - Fairy Tales, Folklore, Legends & MTimeless Wisdom, Talking Animals & Life Lessons for Young Min...
View full details• Author(s): Viktor E. Frankl • Publisher: Random House • Publisher Imprint: Random Hou • Subject: Medical, Nursing and Health Sciences
• Author(s): Madhavi Bharadwaj • Publisher: PRH India • Publisher Imprint: Penguin Ebury Press • BISAC: Parenting - MotherhoodWelcome to the wild, messy, wonderful world of parenting--where the nights are long, the diapers are explosive, and unso...
View full details• Author(s): Vir Das • Publisher: HarperCollins Publishers India • Publisher Imprint: HarperCollins Publishers India • BISAC: Entertainment & Performing ArtsComedian and actor Vir Das is beloved (by some, tolerated by others, blocked by a few...
View full details• Author(s): Eric Carle • Publisher: Penguin Books, Limited (UK) • Publisher Imprint: Penguin Books, Limited (UK) • BISAC: Animals - Butterflies, Moths & CaterpillarsEric Carle's The Very Hungry Caterpillar is a perennial favourite with child...
View full details• Author(s): Prajakta Koli • Publisher: Harper Fiction India • Publisher Imprint: Harper Fiction India • BISAC: Romance - ContemporaryWinner of the Amazon India Popular Choice Debut Book 2025 Award. From one of India's most-loved creators comes s...
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