QUESTIONS AND ANSWERS
ACL role/function - ANS Stabalize knee extension
PCL role/function - ANS RESTRICT Posterior Translation of tibia on femur during knee flexion.
RESTRICT knee hyper flexion
MCL role/function - ANS RESTRICT Valgus
LCL role/function - ANS RESTRICT Varus
ACL moi? - ANS Non-contact, COMBINED movements = foot planted + knee hyperextension,
Genu Valgus + Tibial Rotation (plant and pivot), BLOW to Lateral side of knee, "Unhappy Triad"
"Unhappy Triad"? - ANS HIGH VALGUS force can tear the ACL, MCL, and MEDIAL MENISCUS
PCL moi? - ANS Rare on its own, happens when other tissue damaged. CONTACT: falling and
landing on tibial tuberosity WHILE knee FLEXED
"Dashboard Injury"? - ANS In car: Head on collision where tibia STRIKES dashboard
MCL moi? - ANS Non-Contact = foot PLANTED while PIVOTING in opposite direction.
Contact = blow to lateral side of knee, HIGH VALGUS force
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, LCL moi? - ANS Non-Contact = foot PLANTED while PIVOTING in opposite direction.
Contact = blow to lateral side of knee, HIGH VALGUS force
Orthopedic Tests for Ruptured ACL? - ANS Anterior Drawer Test
Pivot Shift
Lachman's
ACI surgery - ANS Autologous Chondrocyte Implantation, aka, Chondrocyte Transplantation
Indication for ACI surgery? - ANS YOUNGER Patients with single, larger full-thickness
chondral and osteocondral DEFECT of FEMORAL CONDYLE or PATELLA.
Procedure for ACI surgery? - ANS Cartilage HARVESTED Arthroscopically, chondrocytes
EXTRACTED from articular cartilage and CULTURED for weeks, IMPLANTATION via
ARHTROTOMY (open procedure)
Patient Position Post Op ACI surgery? - ANS Critical to position for GRAVITY to EVENLY
DISTRIBUTE chondrocytes along base of defect. Example: Patellar Surface repair = patient in
prone
Duration of implant maturation for ACI surgery? - ANS 6 to 9 months
Microfracture Surgery - ANS Indicated for small defects such as medial or lateral femoral
condyle or patella. Arthroscopic procedure.
Purpose of Microfracture Surgery? - ANS STIMULATE bone marrow repair for ingrowth of
cartilage repair tissue
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