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Preoperative Patellofemoral Chondromalacia is Not a Contraindication for Fixed-Bearing Medial Unicompartmental Knee Arthroplasty
- Source :
- The Journal of arthroplasty. 32(6)
- Publication Year :
- 2016
-
Abstract
- Background Patellofemoral chondromalacia (PFCM) has historically been considered a contraindication for unicompartmental knee arthroplasty (UKA), but there is limited data assessing PFCM's impact on the results of fixed-bearing UKA. Our objective was to assess the impact of medial patellar and/or medial trochlear PFCM on overall and patellofemoral-specific 2-year outcomes after fixed-bearing medial UKA. Methods Intraoperative notes defined the presence and location of PFCM during fixed bearing medial UKA. Outcome measures included the New Knee Society Score (NKSS), Kneeling Ability Score (KAS) and Forgotten Joint Score (FJS-12). Thirty-one knees with PFCM ( PFCM group), and 52 knees without PFCM ( N-PFCM group) were included for analysis. Mann-Whitney U tests assessed the statistical significance of observed differences, and a Bonferroni correction was applied, adjusting threshold for significance to P = .005. Results At minimum follow-up of 2 years, no statistical differences were detected between the N-PFCM and PFCM groups in the postoperative NKSS (159 vs 157, P = .731), preoperative to postoperative NKSS change ( P = .447), FJS-12 (70.5 vs 67.6, P = .471), or KAS (71% vs 65%, P = .217). Patients with isolated patellar chondromalacia (n = 13) demonstrated trends toward worse outcomes according to NKSS (147, P = .198), FJS-12 (58, P = .094), and KAS (46%, P = .018), but were statistically insignificant. No failures occurred in either group. Conclusion Functional outcomes of fixed-bearing medial UKA are not adversely impacted by the presence of PFCM involving the medial patellar facet and/or medial or central trochlea. Further follow-up is needed to determine longer-term implications of fixed-bearing medial UKA in patients with PFCM.
- Subjects :
- musculoskeletal diseases
Male
medicine.medical_specialty
Knee Joint
medicine.medical_treatment
Contraindications, Procedure
03 medical and health sciences
Patellofemoral Joint
0302 clinical medicine
Statistical significance
medicine
Humans
Orthopedics and Sports Medicine
In patient
Knee
Postoperative Period
Unicompartmental knee arthroplasty
Arthroplasty, Replacement, Knee
Contraindication
Aged
Aged, 80 and over
030222 orthopedics
business.industry
Contraindications
Kneeling
Outcome measures
030229 sport sciences
Patella
Middle Aged
Osteoarthritis, Knee
Chondromalacia
Surgery
Fixed bearing
Treatment Outcome
Female
business
Knee Prosthesis
Cartilage Diseases
Subjects
Details
- ISSN :
- 15328406
- Volume :
- 32
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- The Journal of arthroplasty
- Accession number :
- edsair.doi.dedup.....0b030d501a9cbc258b5326bc34e97dd6