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Table 5 Characteristics and outcomes of comparable studies

From: Evaluation of the ‘Spaarne soft tissue procedure’ as a treatment for recurrent patellar dislocations: a four-in-one technique

Author Study design No of Knees Procedure Population Follow-up in years Outcomes
Myers 1999 [13] Cohort, retrospective 42 3-in-1 procedure a 21.1 ± 9.9 Years, RPD 3.7 ± 1.2 Redislocations: 9.5%
Sillanpaa 2008 [18] Cohort, prospective A. 18
B. 29
A. MPFL-reconstruction with adductor magnus tenodesis
B. Roux Goldthwait b
20.0 ± 1.1 Years, RPD 10 ± 1.3 Redislocations: A: 7% and B: 14%
Kujala: A: 88 and B: 86
Postoperative Tegner: A: 4 and B: 5
Oliva 2009 [15] Cohort, prospective 25 3-in-1 procedure a 13.5 ± 3.8 Years, RPD 3.8 ± 0.9 redislocations: 0%
Kujala: 94
Luhmann 2011[10] Cohort, prospective 27 Medial retinacular reefing 14.1 ± 2.3 Years, RPD or subluxations 5.1 ± 1.1 Redislocations: 7.4%
IKDC: 65, Lysholm: 69
Postoperative Tegner: 5.4
Ma 2012 [11] RCT A. 29
B. 32
A. Medial capsule reefing
B. Medial patellar retinaculum plasty
13.5 ± 1.5 Years, RPD with MPFL injury 4.2 ± 0.9 Redislocations: A: 31% and B: 6.2%
Kujala: A: 78 and B: 82
Zhao 2012 [24] RCT A. 43
B. 45
A. Medial retinaculum plication
B. MPFL-reconstruction with semitendinosus tendon
25.5 ± 5.5 Years, RPD or instability 5.0 Redislocations: A: 9.3% and B: 2.2%
IKDC: A: 61 and B: 79, Lysholm: A: 69 and B: 87, Kujala: A: 74 and B: 87
Preoperative Tegner: A: 2.9 and B: 3.1
Postoperative Tegner: A: 4 and B: 5.7
Malecki 2016 [12] Cohort, prospective A. 32
B. 33
A. MPFL-reconstruction with adductor magnus tendon
B. Roux Goldthwait b with vastus medialis advancement
14 ± 2.5 Years, RPD 5.6 ± 2.5 Lysholm: A: 90, B: 84
Kujala: A: 91, B: 85
Yang 2019 [23] Cohort, prospective 58 Reconstruction of MPFL and MTFL with semitendinosus tendon 22.6 ± 4.9 Years, RPD with patella alta 3.0 ± 0.9 IKDC: 85
Kujala: 90
  1. RPD Recurrent patellar dislocations, MPFL Medial patellofemoral ligament, MPTL Medial patellotibial ligament
  2. a 3-in-1 procedure: 1) Lateral retinaculum release 2) vastus medialis advancement 3) transfer of the distal medial third of the PT to the medial collateral ligament and tibia
  3. b Roux Goldthwait: 1) Lateral retinaculum release 2) release of the distal lateral half of the PT 3) transfer behind the medial half of the PT and attached to the tibia