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Published in: Diagnostic Pathology 1/2014

Open Access 01-12-2014 | Research

Operative versus conservative treatment for patellar dislocation: a meta-analysis of 7 randomized controlled trials

Authors: Biao Cheng, Xing Wu, Heng’an Ge, Ye qing Sun, Qiang Zhang

Published in: Diagnostic Pathology | Issue 1/2014

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Abstract

Purpose

Patellofemoral pathology is common, and patellofemoral dislocation mainly affects adolescents and young adults. We conducted a meta-analysis exclusively of RCTs to compare the clinical outcomes of patellar dislocation patients managed operatively versus non-operatively.

Methods

After systematic review of electronic databases and websites, a total of 7 RCTs reporting data on 402 subjects were included. The methodological quality of the literature was assessed using the PEDro critical appraisal tool. Mean differences (MDs) and risk ratio (RR) were calculated for the pooled effects. Heterogeneity was assessed using the I2 test.

Results

Data synthesis showed a lower rate of recurrent patellar dislocation post-treatment in patients managed operatively compared to non-operatively (P = 0.01).

Conclusion

The results suggest a difference in outcomes between the treatment strategies. However the limited number of studies and high risk of inherent bias indicate that future studies involving more patients in better-designed randomized controlled trials will be required.

Virtual slides

The virtual slide(s) for this article can be found here: http://​www.​diagnosticpathol​ogy.​diagnomx.​eu/​vs/​8011948721221355​.
Appendix
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Literature
1.
go back to reference Hughston JC: Subluxation of the patella. J Bone Joint Surg Am. 1968, 50: 1003-1026.PubMed Hughston JC: Subluxation of the patella. J Bone Joint Surg Am. 1968, 50: 1003-1026.PubMed
2.
go back to reference Camanho GL, Viegas Ade C, Bitar AC, Demange MK, Hernandez AJ: Conservative versus surgical treatment for repair of the medial patellofemoral ligament in acute dislocations of the patella. Arthroscopy. 2009, 25: 620-625. 10.1016/j.arthro.2008.12.005.PubMedCrossRef Camanho GL, Viegas Ade C, Bitar AC, Demange MK, Hernandez AJ: Conservative versus surgical treatment for repair of the medial patellofemoral ligament in acute dislocations of the patella. Arthroscopy. 2009, 25: 620-625. 10.1016/j.arthro.2008.12.005.PubMedCrossRef
3.
go back to reference Stefancin JJ, Parker RD: First-time traumatic patellar dislocation: a systematic review. Clin Orthop Relat Res. 2007, 455: 93-101.PubMedCrossRef Stefancin JJ, Parker RD: First-time traumatic patellar dislocation: a systematic review. Clin Orthop Relat Res. 2007, 455: 93-101.PubMedCrossRef
4.
go back to reference Arendt EA, Fithian DC, Cohen E: Current concepts of lateral patella dislocation. Clin Sports Med. 2002, 21: 499-519. 10.1016/S0278-5919(02)00031-5.PubMedCrossRef Arendt EA, Fithian DC, Cohen E: Current concepts of lateral patella dislocation. Clin Sports Med. 2002, 21: 499-519. 10.1016/S0278-5919(02)00031-5.PubMedCrossRef
5.
go back to reference Panagiotopoulos E, Strzelczyk P, Herrmann M, Scuderi G: Cadaveric study on static medial patellar stabilizers: the dynamizing role of the vastus medialis obliquus on medial patellofemoral ligament. Knee Surg Sports Traumatol Arthrosc. 2006, 14: 7-12.PubMedCrossRef Panagiotopoulos E, Strzelczyk P, Herrmann M, Scuderi G: Cadaveric study on static medial patellar stabilizers: the dynamizing role of the vastus medialis obliquus on medial patellofemoral ligament. Knee Surg Sports Traumatol Arthrosc. 2006, 14: 7-12.PubMedCrossRef
6.
go back to reference Smith TO, Song F, Donell ST, Hing CB: Operative versus non-operative management of patellar dislocation. A meta-analysis. Knee Surg Sports Traumatol Arthrosc. 2011, 19: 988-998.PubMedCrossRef Smith TO, Song F, Donell ST, Hing CB: Operative versus non-operative management of patellar dislocation. A meta-analysis. Knee Surg Sports Traumatol Arthrosc. 2011, 19: 988-998.PubMedCrossRef
7.
go back to reference Petri M, Liodakis E, Hofmeister M, Despang FJ, Maier M, Balcarek P, Voigt C, Haasper C, Zeichen J, Stengel D, Krettek C, Frosch KH, Lill H, Jagodzinski M: Operative vs conservative treatment of traumatic patellar dislocation: results of a prospective randomized controlled clinical trial. Arch Orthop Trauma Surg. 2013, 133: 209-213. 10.1007/s00402-012-1639-8.PubMedCrossRef Petri M, Liodakis E, Hofmeister M, Despang FJ, Maier M, Balcarek P, Voigt C, Haasper C, Zeichen J, Stengel D, Krettek C, Frosch KH, Lill H, Jagodzinski M: Operative vs conservative treatment of traumatic patellar dislocation: results of a prospective randomized controlled clinical trial. Arch Orthop Trauma Surg. 2013, 133: 209-213. 10.1007/s00402-012-1639-8.PubMedCrossRef
8.
go back to reference Sillanpaa PJ, Mattila VM, Maenpaa H, Kiuru M, Visuri T, Pihlajamaki H: Treatment with and without initial stabilizing surgery for primary traumatic patellar dislocation. A prospective randomized study. J Bone Joint Surg Am. 2009, 91: 263-273. 10.2106/JBJS.G.01449.PubMedCrossRef Sillanpaa PJ, Mattila VM, Maenpaa H, Kiuru M, Visuri T, Pihlajamaki H: Treatment with and without initial stabilizing surgery for primary traumatic patellar dislocation. A prospective randomized study. J Bone Joint Surg Am. 2009, 91: 263-273. 10.2106/JBJS.G.01449.PubMedCrossRef
9.
go back to reference Bitar AC, Demange MK, D'Elia CO, Camanho GL: Traumatic patellar dislocation: nonoperative treatment compared with MPFL reconstruction using patellar tendon. Am J Sports Med. 2012, 40: 114-122. 10.1177/0363546511423742.PubMedCrossRef Bitar AC, Demange MK, D'Elia CO, Camanho GL: Traumatic patellar dislocation: nonoperative treatment compared with MPFL reconstruction using patellar tendon. Am J Sports Med. 2012, 40: 114-122. 10.1177/0363546511423742.PubMedCrossRef
10.
go back to reference Xu Z, Yu L, Zhang X: Association between the hOGG1 Ser326Cys polymorphism and lung cancer susceptibility: a meta-analysis based on 22,475 subjects. Diagn Pathol. 2013, 8: 144-10.1186/1746-1596-8-144.PubMedPubMedCentralCrossRef Xu Z, Yu L, Zhang X: Association between the hOGG1 Ser326Cys polymorphism and lung cancer susceptibility: a meta-analysis based on 22,475 subjects. Diagn Pathol. 2013, 8: 144-10.1186/1746-1596-8-144.PubMedPubMedCentralCrossRef
11.
go back to reference Cheng H, Qin Y, Fan H, Su P, Zhang X, Zhang H, Zhou G: Overexpression of CARM1 in breast cancer is correlated with poorly characterized clinicopathologic parameters and molecular subtypes. Diagn Pathol. 2013, 8: 129-10.1186/1746-1596-8-129.PubMedPubMedCentralCrossRef Cheng H, Qin Y, Fan H, Su P, Zhang X, Zhang H, Zhou G: Overexpression of CARM1 in breast cancer is correlated with poorly characterized clinicopathologic parameters and molecular subtypes. Diagn Pathol. 2013, 8: 129-10.1186/1746-1596-8-129.PubMedPubMedCentralCrossRef
12.
go back to reference Smith TO, Davies L, Chester R, Clark A, Donell ST: Clinical outcomes of rehabilitation for patients following lateral patellar dislocation: a systematic review. Physiotherapy. 2010, 96: 269-281. 10.1016/j.physio.2010.02.006.PubMedCrossRef Smith TO, Davies L, Chester R, Clark A, Donell ST: Clinical outcomes of rehabilitation for patients following lateral patellar dislocation: a systematic review. Physiotherapy. 2010, 96: 269-281. 10.1016/j.physio.2010.02.006.PubMedCrossRef
13.
go back to reference Wang L, Teng Z, Cai S, Wang D, Zhao X, Yu K: The association between the PPARgamma2 Pro12Ala polymorphism and nephropathy susceptibility in type 2 diabetes: a meta-analysis based on 9,176 subjects. Diagn Pathol. 2013, 8: 118-10.1186/1746-1596-8-118.PubMedPubMedCentralCrossRef Wang L, Teng Z, Cai S, Wang D, Zhao X, Yu K: The association between the PPARgamma2 Pro12Ala polymorphism and nephropathy susceptibility in type 2 diabetes: a meta-analysis based on 9,176 subjects. Diagn Pathol. 2013, 8: 118-10.1186/1746-1596-8-118.PubMedPubMedCentralCrossRef
14.
go back to reference Dou K, Xu Q, Han X: The association between XPC Lys939Gln gene polymorphism and urinary bladder cancer susceptibility: a systematic review and meta-analysis. Diagn Pathol. 2013, 8: 112-10.1186/1746-1596-8-112.PubMedPubMedCentralCrossRef Dou K, Xu Q, Han X: The association between XPC Lys939Gln gene polymorphism and urinary bladder cancer susceptibility: a systematic review and meta-analysis. Diagn Pathol. 2013, 8: 112-10.1186/1746-1596-8-112.PubMedPubMedCentralCrossRef
15.
go back to reference Ahmad CS, Stein BE, Matuz D, Henry JH: Immediate surgical repair of the medial patellar stabilizers for acute patellar dislocation. A review of eight cases. Am J Sports Med. 2000, 28: 804-810.PubMed Ahmad CS, Stein BE, Matuz D, Henry JH: Immediate surgical repair of the medial patellar stabilizers for acute patellar dislocation. A review of eight cases. Am J Sports Med. 2000, 28: 804-810.PubMed
16.
go back to reference Cash JD, Hughston JC: Treatment of acute patellar dislocation. Am J Sports Med. 1988, 16: 244-249. 10.1177/036354658801600308.PubMedCrossRef Cash JD, Hughston JC: Treatment of acute patellar dislocation. Am J Sports Med. 1988, 16: 244-249. 10.1177/036354658801600308.PubMedCrossRef
17.
go back to reference Sallay PI, Poggi J, Speer KP, Garrett WE: Acute dislocation of the patella. A correlative pathoanatomic study. Am J Sports Med. 1996, 24: 52-60. 10.1177/036354659602400110.PubMedCrossRef Sallay PI, Poggi J, Speer KP, Garrett WE: Acute dislocation of the patella. A correlative pathoanatomic study. Am J Sports Med. 1996, 24: 52-60. 10.1177/036354659602400110.PubMedCrossRef
18.
go back to reference Carney JR, Mologne TS, Muldoon M, Cox JS: Long-term evaluation of the Roux-Elmslie-Trillat procedure for patellar instability: a 26-year follow-up. Am J Sports Med. 2005, 33: 1220-1223. 10.1177/0363546504272686.PubMedCrossRef Carney JR, Mologne TS, Muldoon M, Cox JS: Long-term evaluation of the Roux-Elmslie-Trillat procedure for patellar instability: a 26-year follow-up. Am J Sports Med. 2005, 33: 1220-1223. 10.1177/0363546504272686.PubMedCrossRef
19.
go back to reference Fithian DC, Paxton EW, Cohen AB: Indications in the treatment of patellar instability. J Knee Surg. 2004, 17: 47-56.PubMed Fithian DC, Paxton EW, Cohen AB: Indications in the treatment of patellar instability. J Knee Surg. 2004, 17: 47-56.PubMed
20.
go back to reference Merican AM, Kondo E, Amis AA: The effect on patellofemoral joint stability of selective cutting of lateral retinacular and capsular structures. J Biomech. 2009, 42: 291-296. 10.1016/j.jbiomech.2008.11.003.PubMedCrossRef Merican AM, Kondo E, Amis AA: The effect on patellofemoral joint stability of selective cutting of lateral retinacular and capsular structures. J Biomech. 2009, 42: 291-296. 10.1016/j.jbiomech.2008.11.003.PubMedCrossRef
21.
go back to reference Nietosvaara Y, Paukku R, Palmu S, Donell ST: Acute patellar dislocation in children and adolescents. Surgical technique. J Bone Joint Surg Am. 2009, 91 Suppl 2 Pt 1: 139-145.PubMed Nietosvaara Y, Paukku R, Palmu S, Donell ST: Acute patellar dislocation in children and adolescents. Surgical technique. J Bone Joint Surg Am. 2009, 91 Suppl 2 Pt 1: 139-145.PubMed
22.
go back to reference Sillanpaa P, Mattila VM, Visuri T, Maenpaa H, Pihlajamaki H: Ligament reconstruction versus distal realignment for patellar dislocation. Clin Orthop Relat Res. 2008, 466: 1475-1484. 10.1007/s11999-008-0207-6.PubMedPubMedCentralCrossRef Sillanpaa P, Mattila VM, Visuri T, Maenpaa H, Pihlajamaki H: Ligament reconstruction versus distal realignment for patellar dislocation. Clin Orthop Relat Res. 2008, 466: 1475-1484. 10.1007/s11999-008-0207-6.PubMedPubMedCentralCrossRef
23.
go back to reference Maher CG, Sherrington C, Herbert RD, Moseley AM, Elkins M: Reliability of the PEDro scale for rating quality of randomized controlled trials. Phys Ther. 2003, 83: 713-721.PubMed Maher CG, Sherrington C, Herbert RD, Moseley AM, Elkins M: Reliability of the PEDro scale for rating quality of randomized controlled trials. Phys Ther. 2003, 83: 713-721.PubMed
24.
go back to reference Kujala UM, Jaakkola LH, Koskinen SK, Taimela S, Hurme M, Nelimarkka O: Scoring of patellofemoral disorders. Arthroscopy. 1993, 9: 159-163. 10.1016/S0749-8063(05)80366-4.PubMedCrossRef Kujala UM, Jaakkola LH, Koskinen SK, Taimela S, Hurme M, Nelimarkka O: Scoring of patellofemoral disorders. Arthroscopy. 1993, 9: 159-163. 10.1016/S0749-8063(05)80366-4.PubMedCrossRef
25.
go back to reference Tegner Y, Lysholm J: Rating systems in the evaluation of knee ligament injuries. Clin Orthop Relat Res. 1985, 198: 43-49.PubMed Tegner Y, Lysholm J: Rating systems in the evaluation of knee ligament injuries. Clin Orthop Relat Res. 1985, 198: 43-49.PubMed
26.
go back to reference Flandry F, Hunt JP, Terry GC, Hughston JC: Analysis of subjective knee complaints using visual analog scales. Am J Sports Med. 1991, 19: 112-118. 10.1177/036354659101900204.PubMedCrossRef Flandry F, Hunt JP, Terry GC, Hughston JC: Analysis of subjective knee complaints using visual analog scales. Am J Sports Med. 1991, 19: 112-118. 10.1177/036354659101900204.PubMedCrossRef
27.
go back to reference Nikku R, Nietosvaara Y, Kallio PE, Aalto K, Michelsson JE: Operative versus closed treatment of primary dislocation of the patella. Similar 2-year results in 125 randomized patients. Acta Orthop Scand. 1997, 68: 419-423. 10.3109/17453679708996254.PubMedCrossRef Nikku R, Nietosvaara Y, Kallio PE, Aalto K, Michelsson JE: Operative versus closed treatment of primary dislocation of the patella. Similar 2-year results in 125 randomized patients. Acta Orthop Scand. 1997, 68: 419-423. 10.3109/17453679708996254.PubMedCrossRef
28.
go back to reference Nikku R, Nietosvaara Y, Aalto K, Kallio PE: Operative treatment of primary patellar dislocation does not improve medium-term outcome: A 7-year follow-up report and risk analysis of 127 randomized patients. Acta Orthop. 2005, 76: 699-704. 10.1080/17453670510041790.PubMedCrossRef Nikku R, Nietosvaara Y, Aalto K, Kallio PE: Operative treatment of primary patellar dislocation does not improve medium-term outcome: A 7-year follow-up report and risk analysis of 127 randomized patients. Acta Orthop. 2005, 76: 699-704. 10.1080/17453670510041790.PubMedCrossRef
29.
go back to reference Palmu S, Kallio PE, Donell ST, Helenius I, Nietosvaara Y: Acute patellar dislocation in children and adolescents: a randomized clinical trial. J Bone Joint Surg Am. 2008, 90: 463-470. 10.2106/JBJS.G.00072.PubMedCrossRef Palmu S, Kallio PE, Donell ST, Helenius I, Nietosvaara Y: Acute patellar dislocation in children and adolescents: a randomized clinical trial. J Bone Joint Surg Am. 2008, 90: 463-470. 10.2106/JBJS.G.00072.PubMedCrossRef
30.
go back to reference Christiansen SE, Jakobsen BW, Lund B, Lind M: Isolated repair of the medial patellofemoral ligament in primary dislocation of the patella: a prospective randomized study. Arthroscopy. 2008, 24: 881-887. 10.1016/j.arthro.2008.03.012.PubMedCrossRef Christiansen SE, Jakobsen BW, Lund B, Lind M: Isolated repair of the medial patellofemoral ligament in primary dislocation of the patella: a prospective randomized study. Arthroscopy. 2008, 24: 881-887. 10.1016/j.arthro.2008.03.012.PubMedCrossRef
31.
go back to reference Nomura E, Inoue M: Second-look arthroscopy of cartilage changes of the patellofemoral joint, especially the patella, following acute and recurrent patellar dislocation. Osteoarthritis Cartilage. 2005, 13: 1029-1036. 10.1016/j.joca.2005.07.004.PubMedCrossRef Nomura E, Inoue M: Second-look arthroscopy of cartilage changes of the patellofemoral joint, especially the patella, following acute and recurrent patellar dislocation. Osteoarthritis Cartilage. 2005, 13: 1029-1036. 10.1016/j.joca.2005.07.004.PubMedCrossRef
32.
go back to reference Toupin JM, Lechevallier J: Osteochondral fractures of the external femoral condyle after traumatic patellar dislocation during physical exercise in children. Rev Chir Orthop Reparatrice Appar Mot. 1997, 83: 540-550.PubMed Toupin JM, Lechevallier J: Osteochondral fractures of the external femoral condyle after traumatic patellar dislocation during physical exercise in children. Rev Chir Orthop Reparatrice Appar Mot. 1997, 83: 540-550.PubMed
33.
go back to reference Liu Y, Tang W, Wang J, Xie L, Li T, He Y, Qin X, Li S: Clinicopathological and prognostic significance of S100A4 overexpression in colorectal cancer: a meta-analysis. Diagn Pathol. 2013, 8: 181-10.1186/1746-1596-8-181.PubMedPubMedCentralCrossRef Liu Y, Tang W, Wang J, Xie L, Li T, He Y, Qin X, Li S: Clinicopathological and prognostic significance of S100A4 overexpression in colorectal cancer: a meta-analysis. Diagn Pathol. 2013, 8: 181-10.1186/1746-1596-8-181.PubMedPubMedCentralCrossRef
Metadata
Title
Operative versus conservative treatment for patellar dislocation: a meta-analysis of 7 randomized controlled trials
Authors
Biao Cheng
Xing Wu
Heng’an Ge
Ye qing Sun
Qiang Zhang
Publication date
01-12-2014
Publisher
BioMed Central
Published in
Diagnostic Pathology / Issue 1/2014
Electronic ISSN: 1746-1596
DOI
https://doi.org/10.1186/1746-1596-9-60

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