25. Lippacher S, Reichel H, Nelitz M: Patellar fracture after patellar stabilization.39. Orthopäde 2010; 39: 516–8

26. Metcalfe AJ, Clark DA, Kemp MA, Eldridge JD: Trochleoplasty with a flexible osteochondral flap: results from an 11– year series of 214 cases. Bone joint J 2017; 99-B: 344–50

27. Mikashima Y, Kimura M, Kobayashi Y, Miyawaki M, Tomatsu T: Clinical results of isolated reconstruction of the MPFL for recurrent dislocation and subluxation of the patella. Orthop Belg 2006; 72: 65–71

28. Nelitz M, Dornacher D, Dreyhaupt J, Reichel H, Lippacher S: The relation of the distal femoral physis and the medial patellofemoral ligament.Knee Surg Sports Traumatol Arthrosc. 2011; 19: 2067–71

29. Nelitz M, Dreyhaupt J, Lippacher S: Combined trochleoplasty and medial patellofemoral ligament reconstruction for recurrent patellar dislocations in severe trochlear dysplasia: a minimum 2-year follow-up study. Am J Sports Med. 2013; 41: 1005–12

30. Nomura E, Horiuchi Y, Inoue M: Correlation of MR imaging findings and open exploration of medial patellofemoral ligament injuries in acute patellar dislocations. Knee. 2002; 9: 139–43

31. Nomura E, Inoue M: Hybrid MPFL reconstruction using the semitendinosus tendon for recurrent patellar dislocation: minimum 3 years’ Follow-up. Arthroscopy 2006; 22: 787–93

32. Ntagiopoulos PG, Byn P, Dejour D: Midterm Results of Comprehensive Surgical Reconstruction Including Sulcus-Deepening Trochleoplasty in Recurrent Patellar Dislocations With High-Grade Trochlear Dysplasia Am J Sports Med. 2013; 41: 998–1004

33. Parikh SN, Nathan ST, Wall EJ, Eismann EA: Complications of medial patellofemoral ligament reconstruction in young patients. The American Journal of Sports Medicine 2013; 41: 1030–8

34. Petersen W, Forkel P, Achtnich A: Chronische patellofemorale Instabilität. Unfallchirurg 2012; 115: 397–409

35. Philippot R, Boyer B, Testa R, Farizon F, Moyen B: Study of patellar kinematics after reconstruction of the medial patellofemoral ligament. Clin Biomech (Bristol, Avon) 2012; 27: 22–6

36. Schöttle PB, Fucentese SF, Pfirrmann C, Bereiter H, Romero J: Trochleoplasty for patellar instability due to trochlear dysplasia: A minimum 2 year clinical and radiological follow-up of 19 Knees. Acta Orthop. 2005; 76: 693–98

37. Schöttle PB, Schell H, Duda G, Weiler A: Cartilage viability after trochleoplasty. Knee Surg Sports Traumatol Arthrosc. 2007; 15: 161–7

38. Schöttle PB, Schmeling A, Rosenstiel N, Weiler A: Radiographic landmarks for femoral tunnel placement in medial patellofemoral ligament reconstruction. Am J Sports Med. 2007; 35: 801–4

39. Schöttle PB, Zanetti M, Seifert B, Pfirrmann CW, Fucentese SF, Romero J: The tibial tuberosity-trochlear groove distance: a comparative study between CT and MRI scanning. Knee. 2006; 13: 26–31

40. Servien E, Fritsch B, Lustig S, Demey G, et al: In vivo positioning analysis of medial patellofemoral ligament reconstruction. Am J Sports Med 2011; 39: 134–9

41. Shah JN, Howard JS, Flanigan DC, Brophy RH, Carey JL, Lattermann C: A systematic review of complications and failures associated with medial patellofemoral ligament reconstruction for recurrent patellar dislocation. Am J Sports Med. 2012; 40: 1916–23

42. Steiner TM, Torga-Spak R, Teitge RA: Medial patellofemoral ligament reconstruction in patients with lateral patellar instability and trochlear dysplasia. Am J Sports Med 2006; 34: 1254–61

43. Tanner SM, Garth WP Jr, Soileau R, Lemons JE: A modified test for patellar instability: the biomechanical basis. Clin J Sport Med. 2003; 13: 327–38

44. Thaunat M, Erasmus PJ: Management of overtight medial patellofemoral ligament reconstruction. Knee Surg Sports Traumatol Arthrosc. 2009; 17: 480–83

45. Thaunat M, Erasmus PJ: Recurrent patellar dislocation after medial patellofemoral ligament reconstruction. Knee Surg Sports Traumatol Arthrosc. 2008; 16: 40–3

46. Thaunat M, Erasmus PJ: The favourable anisometry: an original concept for medial patellofemoral ligament reconstruction. Knee 2007; 14: 424–28

47. Utting MR, Mulford JS, Eldridge JD: A prospective evaluation of trochleoplasty for the treatment of patellofemoral dislocation and instability. J Bone Joint Surg Br. 2008; 90: 180–5

48. von Engelhardt LV, Fuchs T, Weskamp P, Jerosch J: Effective patellofemoral joint stabilization and low complication rates using a hardware-free MPFL reconstruction technique with an intra-operative adjustment of the graft tension. Knee Surg Sports Traumatol Arthrosc. 2017 Sep 20. [Epub ahead of print]

49. von Engelhardt LV, Weskamp P, Lahner M, Spahn G, Jerosch J: Deepening trochleoplasty combined with balanced medial patellofemoral ligament reconstruction for an adequate graft tensioning. World J Orthop. 2017; 8: 935–45

50. von Engelhardt LV, Fuchs T, Lahner M, Jerosch J: Implant-free, anatomical MPFL plastic: Clinical outcome and patient safety with a mean follow-up of 23 months. OUP 2014; 7: 346–51

51. von Engelhardt LV, Raddatz M, Bouillon B et al.: How reliable is MRI in diagnosing cartilaginous lesions in patients with first and recurrent lateral patellar dislocations? BMC Musculoskelet Disord. 2010; 11: 149

52. von Knoch F, Bohm T, Burgi ML, von Knoch M, Bereiter H: Trochleoplasty for recurrent patellar dislocation in association with trochlear dysplasia. A 4– to 14-year follow-up study. J Bone Joint Surg Br. 2006; 88: 1331–35

53. Wagner D, Pfalzer F, Hingelbaum S, Huth J, Mauch F, Bauer G. The influence of risk factors on clinical outcomes following anatomical medial patellofemoral ligament (MPFL) reconstruction using the gracilis tendon. Knee Surg Sports Traumatol Arthrosc. 2013; 21: 318–24