BACKGROUND Patellar instability is an uncommon complication after total knee arthroplasty(TKA).Partial lateral patella facetectomy(LPF)with lateral retinaculum release treatment of patellar instability is rarely repor...BACKGROUND Patellar instability is an uncommon complication after total knee arthroplasty(TKA).Partial lateral patella facetectomy(LPF)with lateral retinaculum release treatment of patellar instability is rarely reported.CASE SUMMARY We present a case of patellar instability 8 mo after primary TKA.Treatment of this complication was adapted to address the cause of the dislocation.To eliminate patellar instability,we restored the vastus medialis and performed LPF with lateral retinaculum release.We achieved normal patellar tracking.Clinical and radiographic evaluations at the 1-year postoperative follow-up were satisfactory.CONCLUSION LPF with lateral retinaculum release represents a promising option to restore central patellar tracking in patients with patellar instability after TKA in cases without component malposition.展开更多
The gonarthrosis with congenital dislocation of the patella is rare condition. This paper will report about total knee arthroplasty (TKA) for the valgus knee with bilateral congenital dislocation of the patella. A 52-...The gonarthrosis with congenital dislocation of the patella is rare condition. This paper will report about total knee arthroplasty (TKA) for the valgus knee with bilateral congenital dislocation of the patella. A 52-year-old woman presented to our hospital with progressive pain in bilateral knees. Both knee showed severe valgus deformity and lateral dislocation of the patella. Anteroposterior weight-bearing radiographs showed osteoarthritic changes in the lateral compartment with 7 valgus deformity at the right and 15 at the left. A bilateral TKA with cruciate retained components (NAKASHIMA FINE) was performed. Good tracking of the patella was achieved by using a lateral parapatellar approach and vastus medialis plication. There are no normative guidelines of operative procedure about TKA for osteoarthritis of valgus knee with congenital dislocation of the patella. With some referencing to current literature, strategies to good patella tracking are discussed.展开更多
文摘BACKGROUND Patellar instability is an uncommon complication after total knee arthroplasty(TKA).Partial lateral patella facetectomy(LPF)with lateral retinaculum release treatment of patellar instability is rarely reported.CASE SUMMARY We present a case of patellar instability 8 mo after primary TKA.Treatment of this complication was adapted to address the cause of the dislocation.To eliminate patellar instability,we restored the vastus medialis and performed LPF with lateral retinaculum release.We achieved normal patellar tracking.Clinical and radiographic evaluations at the 1-year postoperative follow-up were satisfactory.CONCLUSION LPF with lateral retinaculum release represents a promising option to restore central patellar tracking in patients with patellar instability after TKA in cases without component malposition.
文摘The gonarthrosis with congenital dislocation of the patella is rare condition. This paper will report about total knee arthroplasty (TKA) for the valgus knee with bilateral congenital dislocation of the patella. A 52-year-old woman presented to our hospital with progressive pain in bilateral knees. Both knee showed severe valgus deformity and lateral dislocation of the patella. Anteroposterior weight-bearing radiographs showed osteoarthritic changes in the lateral compartment with 7 valgus deformity at the right and 15 at the left. A bilateral TKA with cruciate retained components (NAKASHIMA FINE) was performed. Good tracking of the patella was achieved by using a lateral parapatellar approach and vastus medialis plication. There are no normative guidelines of operative procedure about TKA for osteoarthritis of valgus knee with congenital dislocation of the patella. With some referencing to current literature, strategies to good patella tracking are discussed.
