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Nylon Suture Degradation Study
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Nylon Suture Degradation Study

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Questions and Answers

Which type of coating serves to increase pliability, reduce tissue drag, and improve tying characteristics?

  • Water-soluble coating
  • Proprietary silicon coating
  • Water-insoluble coating (correct)
  • Antibiotic coating

    • What is the purpose of the water-soluble coating on polyglycolic acid suture (Dexon II)?

  • Enhance tissue drag
  • Reduce knot security
  • Improve pliability
  • Facilitate knot formation (correct)

    • How do water-insoluble coatings affect knot security compared to uncoated suture?

  • Increase knot security
  • Have no effect on knot security
  • Make tissue drag worse
  • Reduce knot security (correct)

    • What is the effect of an alkaline environment on sutures with a glycolide component?

    <p>They degrade rapidly</p> Signup and view all the answers

    What happens to sutures with a dioxanone component in an acid environment?

    <p>They lose tensile strength rapidly</p> Signup and view all the answers

    How does polypropylene, a nonabsorbable suture, react in acidic conditions?

    <p>It remains unaffected</p> Signup and view all the answers

    How does nylon suture, generally non-absorbable, react in acidic conditions?

    <p>It loses tensile strength</p> Signup and view all the answers

    In what conditions does polyglactin 910 (Vicryl) have the least reduction in tensile strength?

    <p>Neutral solution</p> Signup and view all the answers

    How does polyglactin 910 (Vicryl) behave in alkaline solutions?

    <p>It loses tensile strength rapidly</p> Signup and view all the answers

    What impact do bodily fluids like pancreatic secretions have on suture degradation?

    <p>Variety of impacts</p> Signup and view all the answers

    How does exposure to infected milk impact suture strength?

    <p>Reduces strength</p> Signup and view all the answers

    True or False: Catgut suture is uniform in diameter throughout its length.

    Signup and view all the answers

    True or False: Catgut undergoes additional curing processes with chromium trioxide salts which decreases collagen cross-linkages.

    Signup and view all the answers

    How does the presence of synovial fluid impact the rate of suture absorption?

    <p>Increases absorption rate</p> Signup and view all the answers

    How does the rate of application and amount of strain affect the ability of suture to withstand tensile load over time?

    <p>Increases ability to withstand load</p> Signup and view all the answers

    Which suture material is suitable for ligation of small vessels or suturing rapidly healing tissues?

    <p>Catgut</p> Signup and view all the answers

    What is the approximate time it takes for Polyglycolic acid to be completely absorbed?

    <p>60 to 90 days</p> Signup and view all the answers

    Which suture type had the highest breaking stress when compared against other materials?

    <p>Polyglycolic acid</p> Signup and view all the answers

    Which suture material is coated with calcium stearate and polyglactic acid to improve handling characteristics?

    <p>Polyglactin 910</p> Signup and view all the answers

    In what period does Poliglecaprone 25 lose approximately 50% of its strength after implantation in rat subcutis?

    <p>1 week</p> Signup and view all the answers

    Which suture material has lesser knot security when compared to chromic gut?

    <p>Polyglytone 6211</p> Signup and view all the answers

    What is a significant benefit of using triclosan impregnated sutures in human surgery according to the text?

    <p>Decrease in rate of incisional infection</p> Signup and view all the answers

    How are natural absorbable sutures like catgut primarily absorbed in living tissue?

    <p>Enzymatic actions of cellular proteases and collagenases</p> Signup and view all the answers

    Which compound mentioned in the text is NOT used to coat sutures for improving wound healing?

    <p>Acetic acid</p> Signup and view all the answers

    What is a significant factor affecting the rate of suture absorption mentioned in the text?

    <p>The biochemical environment</p> Signup and view all the answers

    In the study mentioned, how did polydioxanone (PDS) suture behave when exposed to sterile urine?

    <p>Lost all strength in 3 days</p> Signup and view all the answers

    What role do acid phosphatase and leucine aminopeptidase play in the enzymatic absorption of catgut suture according to the text?

    <p>They play major enzymatic roles</p> Signup and view all the answers

    What happens to polyglycolic acid (Dexon) suture when exposed to Proteus-infected urine?

    <p>Lost all strength after 1 day</p> Signup and view all the answers

    'Absorbable suture' is commonly defined as suture that loses most of its tensile strength within how many days in living mammalian tissue?

    <p>~60 to 90 days</p> Signup and view all the answers

    'Absorbable suture' as defined by USP is absorbed by what type of tissue according to the text?

    <p>'Living, mammalian tissue'</p> Signup and view all the answers

    In what way are synthetic absorbable sutures primarily absorbed according to the text?

    <p>Hydrolysis by random main-chain scission of ester linkages</p> Signup and view all the answers

    What factors can result in considerable variation in the rate of suture absorption according to the text?

    <p>Material, coatings, size, and biochemical environment</p> Signup and view all the answers

    How did catgut suture behave when exposed to infected urine compared to sterile urine?

    <p>Showed increased absorption rates in infected urine</p> Signup and view all the answers

    What is a potential issue with using nylon sutures for implantation?

    <p>Susceptibility to degradation</p> Signup and view all the answers

    Why is caution advised when using nylon leader line in veterinary orthopedic repair?

    <p>It is prone to elongation</p> Signup and view all the answers

    Which sterilization technique results in an increase in elongation of monofilament nylon leader line?

    <p>Steam sterilization</p> Signup and view all the answers

    Why is polymerized caprolactam suture not recommended for implantation in tissues?

    <p>Can cause sinus formation</p> Signup and view all the answers

    Which characteristic makes Ethibond Excel a preferred suture for musculoskeletal surgery?

    <p>Polybutylate coating for handling qualities</p> Signup and view all the answers

    What is the composition of Ti-Cron sutures?

    <p>Long-chain, high-molecular-weight, linear polyester fibers</p> Signup and view all the answers

    How do steam sterilization and ethylene oxide sterilization affect the mechanical properties of fishing line differently?

    <p>Steam sterilization increases elongation, while ethylene oxide sterilization does not affect ultimate strength.</p> Signup and view all the answers

    What distinguishes leader line from regular fishing line?

    <p>Material composition</p> Signup and view all the answers

    What makes Surgidac a versatile suture choice?

    <p>Available as monofilament or multifilament with different coatings</p> Signup and view all the answers

    Why is caution advised when using nylon leader line as an implantable biomaterial?

    <p>It loses tensile strength after implantation due to hydration and degradation</p> Signup and view all the answers

    How does nylon leader line differ from regular fishing line in its intended use?

    <p>Nylon leader line is primarily used in saltwater fishing for larger fish with strong jaws and sharp teeth</p> Signup and view all the answers

    Which suture material has better handling and less memory compared to polyglyconate?

    <p>Polydioxanone</p> Signup and view all the answers

    What is the approximate strength retention of polyglyconate after 4 to 5 weeks?

    <p>50%</p> Signup and view all the answers

    Which suture material is slowly degraded by hydration even though it's considered nonabsorbable?

    <p>Silk</p> Signup and view all the answers

    Among silk, nylon, polyester, and gut, which suture material has the highest energy to break point?

    <p>Nylon</p> Signup and view all the answers

    Which suture material has the highest knot strength among polyglyconate, polydioxanone, and polypropylene?

    <p>Polyglyconate</p> Signup and view all the answers

    What is the monofilament absorbable suture composed of glycolide, dioxanone, and trimethylene carbonate?

    <p>Glycomer 631</p> Signup and view all the answers

    'Silk should be avoided in any application where excessive inflammation is undesirable' - Which characteristic of silk supports this statement?

    <p>'Silk having a relatively high tissue reactivity'</p> Signup and view all the answers

    'Silk is used frequently for ligation of large vessels' - Why does silk have this specific application according to the text?

    <p>'Silk being a natural, braided suture'</p> Signup and view all the answers

    Which nonabsorbable suture material is most slowly degraded by hydration?

    <p>Silk</p> Signup and view all the answers

    What makes silk a preferred choice for ligation of large vessels?

    <p>Good knot security</p> Signup and view all the answers

    Which suture material has poor knot tying characteristics when used within arthroscopic cannulas?

    <p>Surgidac</p> Signup and view all the answers

    What is the distinguishing characteristic of polybutester suture among most sutures?

    <p>Marked elasticity</p> Signup and view all the answers

    Which suture material elongates approximately 4 times more than nylon at 2 N of force?

    <p>Polybutester</p> Signup and view all the answers

    What are Polydek and Tevdek examples of?

    <p>Coated and braided polyethylene sutures</p> Signup and view all the answers

    Which composite suture has a multifilament ultra-high-molecular-weight polyethylene core?

    <p>FiberWire</p> Signup and view all the answers

    What is the distinguishing feature of FiberWire compared to braided polyester sutures?

    <p>Greater knot security and abrasion resistance</p> Signup and view all the answers

    What is the primary application of stainless steel sutures?

    <p>Musculoskeletal applications</p> Signup and view all the answers

    Which suture material has characteristics theorized to be advantageous when closing postoperatively swelling wounds?

    <p>Polybutester</p> Signup and view all the answers

    What is the key difference between Polydek and Tevdek sutures regarding their coating with polytetrafluoroethylene?

    <p>Polydek is impregnated, Tevdek is lightly coated</p> Signup and view all the answers

    Which composite suture maintains stiffness until ultimate failure, unlike Stainless Steel?

    <p>FiberWire</p> Signup and view all the answers

    What is the primary reason for the replacement of Stainless Steel suture by polyblend composite sutures?

    <p>Strength</p> Signup and view all the answers

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