title: Comparison of patellofemoral outcomes after TKA using two prostheses with different patellofemoral design features.
abstract: OBJECTIVE
  The purpose of the present study was to compare the clinical and radiographic results after TKA using two prostheses with different sagittal patellofemoral design features, including outcomes related to compatibility of the patellofemoral joint.
  
  
  METHODS
  The clinical and radiographic results of 81 patients (100 knees) who underwent TKA using the specific prosthesis (group A) were compared with those in a control group who underwent TKA using the other prosthesis (group B). The presence of anterior knee joint pain, patellar crepitation, and patellar clunk syndrome was also checked.
  
  
  RESULTS
  The function score and maximum flexion angle at the last follow-up were slightly better in group A than those in group B (92.0 ± 2.3 vs. 90.6 ± 4.2) (133.6° ± 8.4° vs. 129.6° ± 11.4°). Anterior knee pain was observed in 6 knees and patellar crepitation in four knees in group A. In group B, these symptoms were observed in 22 knees and 18 knees, respectively. There was no patellar clunk syndrome in either group. The alignment was corrected with satisfactory positioning of components. The patellar height remained unchanged after TKA in the two groups. The differences between preoperative and postoperative patellar tilt angle and patellar translation were small.
  
  
  CONCLUSIONS
  When comparing the clinical and radiographic results after TKA using two prostheses with different sagittal patellofemoral design features, TKA using the specific prosthesis provided satisfactory results with less clinical symptoms related to the patellofemoral kinematics with TKA using the other prosthesis.
  
  
  METHODS
  III.
authors: Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, 23 Kyunghee-daero, Dongdaemun-gu, Seoul, 130-872, Korea.
authors: Dae Kyung
authors: DK
authors: Bae
authors: Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, 23 Kyunghee-daero, Dongdaemun-gu, Seoul, 130-872, Korea.
authors: Jong Hun
authors: JH
authors: Baek
authors: Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, 23 Kyunghee-daero, Dongdaemun-gu, Seoul, 130-872, Korea.
authors: Kyung Tack
authors: KT
authors: Yoon
authors: Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, 23 Kyunghee-daero, Dongdaemun-gu, Seoul, 130-872, Korea.
authors: Hyuck Sung
authors: HS
authors: Son
authors: Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, 23 Kyunghee-daero, Dongdaemun-gu, Seoul, 130-872, Korea. songsjun@khmc.or.kr.
authors: Sang Jun
authors: SJ
authors: Song
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D057071:Patellofemoral Joint / Q000601:surgery*; D011474:Prosthesis Design; D016059:Range of Motion, Articular
keywords: Knee; Patellofemoral joint compatibility; Total knee arthroplasty