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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