Skip to main content
Top
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 8/2020

Open Access 01-08-2020 | KNEE

Preoperative medial knee instability is an underestimated risk factor for failure of revision ACL reconstruction

Authors: Lena Alm, Matthias Krause, Karl-Heinz Frosch, Ralph Akoto

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 8/2020

Login to get access

Abstract

Purpose

The purpose of this study was to carefully analyse the reasons for revision ACLR failure to optimize the surgical revision technique and minimize the risk of recurrent re-rupture. Large studies with a minimum of 2 years of follow-up that clinically examine patients with revision ACLR are rare.

Methods

Between 2013 and 2016, 111 patients who underwent revision ACLR were included in the retrospective study. All patients were examined for a minimum of 2 years after revision surgery (35 ± 3.4 months, mean ± STD) and identified as “failed revision ACLR” (side-to-side difference ≥ 5 mm and pivot-shift grade 2/3) or “stable revision ACLR”.

Results

Failure after revision ACLR occurred in 14.5% (n = 16) of the cases. Preoperative medial knee instability (n = 36) was associated with failure; thus, patients had a 17 times greater risk of failure when medial knee instability was diagnosed (p = 0.015). The risk of failure was reduced when patients had medial stabilization (n = 24, p = 0.034) and extra-articular lateral tenodesis during revision surgery (n = 51, p = 0.028). Increased posterior tibial slope (n = 11 ≥ 12°, p = 0.046) and high-grade anterior knee laxity (side-to-side difference > 6 mm and pivot-shift grade 3, n = 41, p = 0.034) were associated with increased failure of revision ACLR. Obese patients had a 9 times greater risk of failure (p = 0.008, n = 30).

Conclusion

This study demonstrates the largest revision ACLR patient group with pre- and postoperative clinical examination data and a follow-up of 2 years published to date. Preoperative medial knee instability is an underestimated risk factor for revision ACLR failure. Additionally, high-grade anterior knee laxity, increased PTS and high BMI are risk factors for failure of revision ACLR, while additional medial stabilization and lateral extra-articular tenodesis reduce the risk of failure.

Level of evidence

III.
Literature
1.
go back to reference Ahn JH, Lee SH (2016) Risk factors for knee instability after anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc 24:2936–2942PubMed Ahn JH, Lee SH (2016) Risk factors for knee instability after anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc 24:2936–2942PubMed
2.
go back to reference American Medical Association. Standard Nomenclature of Athletic Injuries. 1968 American Medical Association. Standard Nomenclature of Athletic Injuries. 1968
3.
go back to reference Battaglia MJ 2nd, Lenhoff MW, Ehteshami JR, Lyman S, Provencher MT, Wickiewicz TL et al (2009) Medial collateral ligament injuries and subsequent load on the anterior cruciate ligament: a biomechanical evaluation in a cadaveric model. Am J Sports Med 37:305–311PubMed Battaglia MJ 2nd, Lenhoff MW, Ehteshami JR, Lyman S, Provencher MT, Wickiewicz TL et al (2009) Medial collateral ligament injuries and subsequent load on the anterior cruciate ligament: a biomechanical evaluation in a cadaveric model. Am J Sports Med 37:305–311PubMed
4.
go back to reference Bernhardson AS, Aman ZS, Dornan GJ, Kemler BR, Storaci HW, Brady AW et al (2019) Tibial slope and its effect on force in anterior cruciate ligament grafts: anterior cruciate ligament force increases linearly as posterior tibial slope increases. Am J Sports Med 47:296–302PubMed Bernhardson AS, Aman ZS, Dornan GJ, Kemler BR, Storaci HW, Brady AW et al (2019) Tibial slope and its effect on force in anterior cruciate ligament grafts: anterior cruciate ligament force increases linearly as posterior tibial slope increases. Am J Sports Med 47:296–302PubMed
5.
go back to reference Christensen JJ, Krych AJ, Engasser WM, Vanhees MK, Collins MS, Dahm DL (2015) Lateral tibial posterior slope is increased in patients with early graft failure after anterior cruciate ligament reconstruction. Am J Sports Med 43:2510–2514PubMed Christensen JJ, Krych AJ, Engasser WM, Vanhees MK, Collins MS, Dahm DL (2015) Lateral tibial posterior slope is increased in patients with early graft failure after anterior cruciate ligament reconstruction. Am J Sports Med 43:2510–2514PubMed
6.
go back to reference DeLong JM, Waterman BR (2015) Surgical repair of medial collateral ligament and posteromedial corner injuries of the knee: a systematic review. Arthroscopy 31:2249–2255.e2245PubMed DeLong JM, Waterman BR (2015) Surgical repair of medial collateral ligament and posteromedial corner injuries of the knee: a systematic review. Arthroscopy 31:2249–2255.e2245PubMed
7.
go back to reference Diamantopoulos AP, Lorbach O, Paessler HH (2008) Anterior cruciate ligament revision reconstruction: results in 107 patients. Am J Sports Med 36:851–860PubMed Diamantopoulos AP, Lorbach O, Paessler HH (2008) Anterior cruciate ligament revision reconstruction: results in 107 patients. Am J Sports Med 36:851–860PubMed
8.
go back to reference Dong J, Wang XF, Men X, Zhu J, Walker GN, Zheng XZ et al (2015) Surgical treatment of acute grade III medial collateral ligament injury combined with anterior cruciate ligament injury: anatomic ligament repair versus triangular ligament reconstruction. Arthroscopy 31:1108–1116PubMed Dong J, Wang XF, Men X, Zhu J, Walker GN, Zheng XZ et al (2015) Surgical treatment of acute grade III medial collateral ligament injury combined with anterior cruciate ligament injury: anatomic ligament repair versus triangular ligament reconstruction. Arthroscopy 31:1108–1116PubMed
9.
go back to reference Erickson BJ, Cvetanovich GL, Frank RM, Riff AJ, Bach BR Jr (2017) Revision ACL reconstruction: a critical analysis review. JBJS Rev 5:e1PubMed Erickson BJ, Cvetanovich GL, Frank RM, Riff AJ, Bach BR Jr (2017) Revision ACL reconstruction: a critical analysis review. JBJS Rev 5:e1PubMed
10.
go back to reference Ericsson D, Ostenberg AH, Andersson E, Alricsson M (2017) Test-retest reliability of repeated knee laxity measurements in the acute phase following a knee trauma using a Rolimeter. J Exerc Rehabil 13:550–558PubMedPubMedCentral Ericsson D, Ostenberg AH, Andersson E, Alricsson M (2017) Test-retest reliability of repeated knee laxity measurements in the acute phase following a knee trauma using a Rolimeter. J Exerc Rehabil 13:550–558PubMedPubMedCentral
11.
go back to reference Funchal LFZ, Astur DC, Ortiz R, Cohen M (2019) The presence of the arthroscopic "floating meniscus" sign as an indicator for surgical intervention in patients with combined anterior cruciate ligament and grade II medial collateral ligament injury. Arthroscopy 35:930–937PubMed Funchal LFZ, Astur DC, Ortiz R, Cohen M (2019) The presence of the arthroscopic "floating meniscus" sign as an indicator for surgical intervention in patients with combined anterior cruciate ligament and grade II medial collateral ligament injury. Arthroscopy 35:930–937PubMed
12.
go back to reference George MS, Dunn WR, Spindler KP (2006) Current concepts review: revision anterior cruciate ligament reconstruction. Am J Sports Med 34:2026–2037PubMed George MS, Dunn WR, Spindler KP (2006) Current concepts review: revision anterior cruciate ligament reconstruction. Am J Sports Med 34:2026–2037PubMed
13.
go back to reference Giffin JR, Vogrin TM, Zantop T, Woo SL, Harner CD (2004) Effects of increasing tibial slope on the biomechanics of the knee. Am J Sports Med 32:376–382PubMed Giffin JR, Vogrin TM, Zantop T, Woo SL, Harner CD (2004) Effects of increasing tibial slope on the biomechanics of the knee. Am J Sports Med 32:376–382PubMed
14.
go back to reference Haimes JL, Wroble RR, Grood ES, Noyes FR (1994) Role of the medial structures in the intact and anterior cruciate ligament-deficient knee. Limits of motion in the human knee. Am J Sports Med 22:402–409PubMed Haimes JL, Wroble RR, Grood ES, Noyes FR (1994) Role of the medial structures in the intact and anterior cruciate ligament-deficient knee. Limits of motion in the human knee. Am J Sports Med 22:402–409PubMed
15.
go back to reference Heijne A, Ang BO, Werner S (2009) Predictive factors for 12-month outcome after anterior cruciate ligament reconstruction. Scand J Med Sci Sports 19:842–849PubMed Heijne A, Ang BO, Werner S (2009) Predictive factors for 12-month outcome after anterior cruciate ligament reconstruction. Scand J Med Sci Sports 19:842–849PubMed
16.
go back to reference Hewett TE, Myer GD, Ford KR (2006) Anterior cruciate ligament injuries in female athletes: Part 1, mechanisms and risk factors. Am J Sports Med 34:299–311PubMed Hewett TE, Myer GD, Ford KR (2006) Anterior cruciate ligament injuries in female athletes: Part 1, mechanisms and risk factors. Am J Sports Med 34:299–311PubMed
17.
go back to reference Hughston JC (1994) The importance of the posterior oblique ligament in repairs of acute tears of the medial ligaments in knees with and without an associated rupture of the anterior cruciate ligament. Results of long-term follow-up. J Bone Joint Surg Am 76:1328–1344PubMed Hughston JC (1994) The importance of the posterior oblique ligament in repairs of acute tears of the medial ligaments in knees with and without an associated rupture of the anterior cruciate ligament. Results of long-term follow-up. J Bone Joint Surg Am 76:1328–1344PubMed
18.
go back to reference Hughston JCAJ, Cross MJ, Moschi A (1976) Classification of knee ligament instabilities. Part II. The lateral compartment. J Bone Joint Surg Am 58:173–179PubMed Hughston JCAJ, Cross MJ, Moschi A (1976) Classification of knee ligament instabilities. Part II. The lateral compartment. J Bone Joint Surg Am 58:173–179PubMed
19.
go back to reference Hughston JCAJ, Cross MJ, Moschi A (1976) Classification of knee ligament instabilities. Part I. The medial compartment and cruciate ligaments. J Bone Joint Surg Am 58:159–172PubMed Hughston JCAJ, Cross MJ, Moschi A (1976) Classification of knee ligament instabilities. Part I. The medial compartment and cruciate ligaments. J Bone Joint Surg Am 58:159–172PubMed
20.
go back to reference Irrgang JJ, Anderson AF (2002) Development and validation of health-related quality of life measures for the knee. Clin Orthop Relat Res 402:95–109 Irrgang JJ, Anderson AF (2002) Development and validation of health-related quality of life measures for the knee. Clin Orthop Relat Res 402:95–109
21.
go back to reference Jacobson KE, Chi FS (2006) Evaluation and treatment of medial collateral ligament and medial-sided injuries of the knee. Sports Med Arthrosc Rev 14:58–66PubMed Jacobson KE, Chi FS (2006) Evaluation and treatment of medial collateral ligament and medial-sided injuries of the knee. Sports Med Arthrosc Rev 14:58–66PubMed
22.
go back to reference Kanamori A, Sakane M, Zeminski J, Rudy TW, Woo SL (2000) In-situ force in the medial and lateral structures of intact and ACL-deficient knees. J Orthop Sci 5:567–571PubMed Kanamori A, Sakane M, Zeminski J, Rudy TW, Woo SL (2000) In-situ force in the medial and lateral structures of intact and ACL-deficient knees. J Orthop Sci 5:567–571PubMed
23.
go back to reference Krause M, Drenck TC, Korthaus A, Preiss A, Frosch KH, Akoto R (2018) Patella height is not altered by descending medial open-wedge high tibial osteotomy (HTO) compared to ascending HTO. Knee Surg Sports Traumatol Arthrosc 26:1859–1866PubMed Krause M, Drenck TC, Korthaus A, Preiss A, Frosch KH, Akoto R (2018) Patella height is not altered by descending medial open-wedge high tibial osteotomy (HTO) compared to ascending HTO. Knee Surg Sports Traumatol Arthrosc 26:1859–1866PubMed
24.
go back to reference Lind M, Jakobsen BW, Lund B, Hansen MS, Abdallah O, Christiansen SE (2009) Anatomical reconstruction of the medial collateral ligament and posteromedial corner of the knee in patients with chronic medial collateral ligament instability. Am J Sports Med 37:1116–1122PubMed Lind M, Jakobsen BW, Lund B, Hansen MS, Abdallah O, Christiansen SE (2009) Anatomical reconstruction of the medial collateral ligament and posteromedial corner of the knee in patients with chronic medial collateral ligament instability. Am J Sports Med 37:1116–1122PubMed
25.
go back to reference Louis ML, D'Ingrado P, Ehkirch FP, Bertiaux S, Colombet P, Sonnery-Cottet B et al (2017) Combined intra- and extra-articular grafting for revision ACL reconstruction: A multicentre study by the French Arthroscopy Society (SFA). Orthop Traumatol Surg Res 103:S223–S229PubMed Louis ML, D'Ingrado P, Ehkirch FP, Bertiaux S, Colombet P, Sonnery-Cottet B et al (2017) Combined intra- and extra-articular grafting for revision ACL reconstruction: A multicentre study by the French Arthroscopy Society (SFA). Orthop Traumatol Surg Res 103:S223–S229PubMed
26.
go back to reference Magnussen RA, Reinke EK, Huston LJ, Group M, Hewett TE, Spindler KP (2016) Effect of high-grade preoperative knee laxity on anterior cruciate ligament reconstruction outcomes. Am J Sports Med 44:3077–3082 Magnussen RA, Reinke EK, Huston LJ, Group M, Hewett TE, Spindler KP (2016) Effect of high-grade preoperative knee laxity on anterior cruciate ligament reconstruction outcomes. Am J Sports Med 44:3077–3082
27.
go back to reference Magnussen RA, Reinke EK, Huston LJ, Hewett TE, Spindler KP (2016) Effect of high-grade preoperative knee laxity on anterior cruciate ligament reconstruction outcomes. Am J Sports Med 44:3077–3082PubMedPubMedCentral Magnussen RA, Reinke EK, Huston LJ, Hewett TE, Spindler KP (2016) Effect of high-grade preoperative knee laxity on anterior cruciate ligament reconstruction outcomes. Am J Sports Med 44:3077–3082PubMedPubMedCentral
28.
go back to reference Noyes FR, Barber-Westin SD (2001) Revision anterior cruciate surgery with use of bone-patellar tendon-bone autogenous grafts. J Bone Joint Surg Am 83:1131–1143PubMed Noyes FR, Barber-Westin SD (2001) Revision anterior cruciate surgery with use of bone-patellar tendon-bone autogenous grafts. J Bone Joint Surg Am 83:1131–1143PubMed
29.
go back to reference O'Brien SJ, Warren RF, Pavlov H, Panariello R, Wickiewicz TL (1991) Reconstruction of the chronically insufficient anterior cruciate ligament with the central third of the patellar ligament. J Bone Joint Surg Am 73:278–286PubMed O'Brien SJ, Warren RF, Pavlov H, Panariello R, Wickiewicz TL (1991) Reconstruction of the chronically insufficient anterior cruciate ligament with the central third of the patellar ligament. J Bone Joint Surg Am 73:278–286PubMed
30.
go back to reference Pandey V, Khanna V, Madi S, Tripathi A, Acharya K (2017) Clinical outcome of primary medial collateral ligament-posteromedial corner repair with or without staged anterior cruciate ligament reconstruction. Injury 48:1236–1242PubMed Pandey V, Khanna V, Madi S, Tripathi A, Acharya K (2017) Clinical outcome of primary medial collateral ligament-posteromedial corner repair with or without staged anterior cruciate ligament reconstruction. Injury 48:1236–1242PubMed
31.
go back to reference Preiss A, Giannakos A, Frosch KH (2012) Minimally invasive augmentation of the medial collateral ligament with autologous hamstring tendons in chronic knee instability. Oper Orthop Traumatol 24:335–347PubMed Preiss A, Giannakos A, Frosch KH (2012) Minimally invasive augmentation of the medial collateral ligament with autologous hamstring tendons in chronic knee instability. Oper Orthop Traumatol 24:335–347PubMed
32.
go back to reference Salmon LJ, Pinczewski LA, Russell VJ, Refshauge K (2006) Revision anterior cruciate ligament reconstruction with hamstring tendon autograft: 5- to 9-year follow-up. Am J Sports Med 34:1604–1614PubMed Salmon LJ, Pinczewski LA, Russell VJ, Refshauge K (2006) Revision anterior cruciate ligament reconstruction with hamstring tendon autograft: 5- to 9-year follow-up. Am J Sports Med 34:1604–1614PubMed
33.
go back to reference Sonnery-Cottet B, Daggett M, Fayard JM, Ferretti A, Helito CP, Lind M et al (2017) Anterolateral Ligament Expert Group consensus paper on the management of internal rotation and instability of the anterior cruciate ligament - deficient knee. J Orthop Traumatol 18:91–106PubMedPubMedCentral Sonnery-Cottet B, Daggett M, Fayard JM, Ferretti A, Helito CP, Lind M et al (2017) Anterolateral Ligament Expert Group consensus paper on the management of internal rotation and instability of the anterior cruciate ligament - deficient knee. J Orthop Traumatol 18:91–106PubMedPubMedCentral
34.
go back to reference Sonnery-Cottet B, Saithna A, Cavalier M, Kajetanek C, Temponi EF, Daggett M et al (2017) Anterolateral ligament reconstruction is associated with significantly reduced ACL graft rupture rates at a minimum follow-up of 2 years: a prospective comparative study of 502 patients from the SANTI study group. Am J Sports Med 45:1547–1557PubMed Sonnery-Cottet B, Saithna A, Cavalier M, Kajetanek C, Temponi EF, Daggett M et al (2017) Anterolateral ligament reconstruction is associated with significantly reduced ACL graft rupture rates at a minimum follow-up of 2 years: a prospective comparative study of 502 patients from the SANTI study group. Am J Sports Med 45:1547–1557PubMed
35.
go back to reference Southam BR, Colosimo AJ, Grawe B (2018) Underappreciated factors to consider in revision anterior cruciate ligament reconstruction: a current concepts review. Orthop J Sports Med 6:2325967117751689PubMedPubMedCentral Southam BR, Colosimo AJ, Grawe B (2018) Underappreciated factors to consider in revision anterior cruciate ligament reconstruction: a current concepts review. Orthop J Sports Med 6:2325967117751689PubMedPubMedCentral
36.
go back to reference Stracciolini A, Stein CJ, Zurakowski D, Meehan WP 3rd, Myer GD, Micheli LJ (2015) Anterior cruciate ligament injuries in pediatric athletes presenting to sports medicine clinic: a comparison of males and females through growth and development. Sports Health 7:130–136PubMedPubMedCentral Stracciolini A, Stein CJ, Zurakowski D, Meehan WP 3rd, Myer GD, Micheli LJ (2015) Anterior cruciate ligament injuries in pediatric athletes presenting to sports medicine clinic: a comparison of males and females through growth and development. Sports Health 7:130–136PubMedPubMedCentral
37.
go back to reference Svantesson E, Hamrin Senorski E, Alentorn-Geli E, Westin O, Sundemo D, Grassi A et al (2019) Increased risk of ACL revision with non-surgical treatment of a concomitant medial collateral ligament injury: a study on 19,457 patients from the Swedish National Knee Ligament Registry. Knee Surg Sports Traumatol Arthrosc 27:2450–2459PubMed Svantesson E, Hamrin Senorski E, Alentorn-Geli E, Westin O, Sundemo D, Grassi A et al (2019) Increased risk of ACL revision with non-surgical treatment of a concomitant medial collateral ligament injury: a study on 19,457 patients from the Swedish National Knee Ligament Registry. Knee Surg Sports Traumatol Arthrosc 27:2450–2459PubMed
38.
go back to reference Trojani C, Sbihi A, Djian P, Potel JF, Hulet C, Jouve F et al (2011) Causes for failure of ACL reconstruction and influence of meniscectomies after revision. Knee Surg Sports Traumatol Arthrosc 19:196–201PubMed Trojani C, Sbihi A, Djian P, Potel JF, Hulet C, Jouve F et al (2011) Causes for failure of ACL reconstruction and influence of meniscectomies after revision. Knee Surg Sports Traumatol Arthrosc 19:196–201PubMed
39.
go back to reference Uhorchak JM, Scoville CR, Williams GN, Arciero RA, St Pierre P, Taylor DC (2003) Risk factors associated with noncontact injury of the anterior cruciate ligament: a prospective four-year evaluation of 859 West Point cadets. Am J Sports Med 31:831–842PubMed Uhorchak JM, Scoville CR, Williams GN, Arciero RA, St Pierre P, Taylor DC (2003) Risk factors associated with noncontact injury of the anterior cruciate ligament: a prospective four-year evaluation of 859 West Point cadets. Am J Sports Med 31:831–842PubMed
40.
go back to reference Webb JM, Salmon LJ, Leclerc E, Pinczewski LA, Roe JP (2013) Posterior tibial slope and further anterior cruciate ligament injuries in the anterior cruciate ligament-reconstructed patient. Am J Sports Med 41:2800–2804PubMed Webb JM, Salmon LJ, Leclerc E, Pinczewski LA, Roe JP (2013) Posterior tibial slope and further anterior cruciate ligament injuries in the anterior cruciate ligament-reconstructed patient. Am J Sports Med 41:2800–2804PubMed
41.
go back to reference Wijdicks CA, Michalski MP, Rasmussen MT, Goldsmith MT, Kennedy NI, Lind M et al (2013) Superficial medial collateral ligament anatomic augmented repair versus anatomic reconstruction: an in vitro biomechanical analysis. Am J Sports Med 41:2858–2866PubMed Wijdicks CA, Michalski MP, Rasmussen MT, Goldsmith MT, Kennedy NI, Lind M et al (2013) Superficial medial collateral ligament anatomic augmented repair versus anatomic reconstruction: an in vitro biomechanical analysis. Am J Sports Med 41:2858–2866PubMed
42.
go back to reference Williams A, Ball S, Stephen J, White N, Jones M, Amis A (2017) The scientific rationale for lateral tenodesis augmentation of intra-articular ACL reconstruction using a modified 'Lemaire' procedure. Knee Surg Sports Traumatol Arthrosc 25:1339–1344PubMed Williams A, Ball S, Stephen J, White N, Jones M, Amis A (2017) The scientific rationale for lateral tenodesis augmentation of intra-articular ACL reconstruction using a modified 'Lemaire' procedure. Knee Surg Sports Traumatol Arthrosc 25:1339–1344PubMed
43.
go back to reference Wright RW, Huston LJ, Spindler KP, Dunn WR, Haas AK, Allen CR et al (2010) Descriptive epidemiology of the Multicenter ACL Revision Study (MARS) cohort. Am J Sports Med 38:1979–1986PubMed Wright RW, Huston LJ, Spindler KP, Dunn WR, Haas AK, Allen CR et al (2010) Descriptive epidemiology of the Multicenter ACL Revision Study (MARS) cohort. Am J Sports Med 38:1979–1986PubMed
44.
go back to reference Yoon KH, Kim JS, Park SY, Park SE (2018) One-stage revision anterior cruciate ligament reconstruction: results according to preoperative bone tunnel diameter: five to fifteen-year follow-up. J Bone Joint Surg Am 100:993–1000PubMed Yoon KH, Kim JS, Park SY, Park SE (2018) One-stage revision anterior cruciate ligament reconstruction: results according to preoperative bone tunnel diameter: five to fifteen-year follow-up. J Bone Joint Surg Am 100:993–1000PubMed
45.
go back to reference Zaffagnini S, Bonanzinga T, Marcheggiani Muccioli GM, Giordano G, Bruni D, Bignozzi S et al (2011) Does chronic medial collateral ligament laxity influence the outcome of anterior cruciate ligament reconstruction?: a prospective evaluation with a minimum three-year follow-up. J Bone Joint Surg Br 93:1060–1064PubMed Zaffagnini S, Bonanzinga T, Marcheggiani Muccioli GM, Giordano G, Bruni D, Bignozzi S et al (2011) Does chronic medial collateral ligament laxity influence the outcome of anterior cruciate ligament reconstruction?: a prospective evaluation with a minimum three-year follow-up. J Bone Joint Surg Br 93:1060–1064PubMed
46.
go back to reference Zeng C, Yang T, Wu S, Gao SG, Li H, Deng ZH et al (2016) Is posterior tibial slope associated with noncontact anterior cruciate ligament injury? Knee Surg Sports Traumatol Arthrosc 24:830–837PubMed Zeng C, Yang T, Wu S, Gao SG, Li H, Deng ZH et al (2016) Is posterior tibial slope associated with noncontact anterior cruciate ligament injury? Knee Surg Sports Traumatol Arthrosc 24:830–837PubMed
Metadata
Title
Preoperative medial knee instability is an underestimated risk factor for failure of revision ACL reconstruction
Authors
Lena Alm
Matthias Krause
Karl-Heinz Frosch
Ralph Akoto
Publication date
01-08-2020
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 8/2020
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-020-06133-y

Other articles of this Issue 8/2020

Knee Surgery, Sports Traumatology, Arthroscopy 8/2020 Go to the issue