bioabsorbable-materials
An orthopaedic trainee is reviewing the properties of bioabsorbable interference screws for ACL reconstruction. The senior surgeon mentions that material selection is important because different polymers have different degradation profiles and complication risks. **Which of the following statements BEST describes the difference between PGA (polyglycolic acid) and PLLA (poly-L-lactic acid)?**
Mark each as TRUE or FALSE
PGA is hydrophobic with slow degradation over years; PLLA is hydrophilic with rapid degradation in w...
Both degrade by enzymatic breakdown; PGA has lower foreign body reaction rates
PGA is hydrophilic with rapid degradation and higher risk of sterile abscess; PLLA is hydrophobic wi...
PGA and PLLA have identical degradation profiles but differ in initial mechanical strength
PGA degrades to form calcium phosphite; PLLA degrades to form hydroxyapatite
Answer the questions to see explanations
Click T (True) or F (False) for each option