Medial patellofemoral ligament repair for recurrent patellar dislocation

Christopher L. Camp, Aaron Krych, Diane L. Dahm, Bruce A Levy, Michael J. Stuart

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral patellar dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated. Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral patellar dislocation. Study Design: Case series; Level of evidence, 4. Methods: The records of all patients undergoing MPFL repair for recurrent patellar dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in this study. Clinical, functional, and radiographic outcomes were assessed at an average of 4 years after surgery (range, 2-7 years), using recurrent instability as the primary end point. Results: The success rate of MPFL repair for preventing recurrent dislocations was 72% (21 of 29 knees). Eight patients (28%) experienced a recurrent lateral patellar dislocation. Five of these patients required a reoperation, including two MPFL reconstructions, 1 tibial tubercle osteotomy with MPFL reconstruction, 1 tibial tubercle osteotomy with revision MPFL repair, and 1 revision MPFL repair. At final follow-up, the mean Lysholm and Kujala scores were 86 (range, 42-100) and 92 (range, 57-105), respectively. Postoperative radiographs revealed a mean patellofemoral congruence angle improvement of 27° (range, 5°-44°). The only statistically significant risk factor for failure was nonanatomical MPFL repair at the medial femoral condyle (P =.004). Conclusion: Isolated repair of the MPFL for recurrent patellar instability is associated with a relatively high failure rate, but remains a viable surgical option if surgical technique principles are followed. The clinical success of this operation depends on restoration of the anatomical origin of the MPFL and careful patient selection.

Original languageEnglish (US)
Pages (from-to)2248-2254
Number of pages7
JournalAmerican Journal of Sports Medicine
Volume38
Issue number11
DOIs
StatePublished - Nov 2010

Fingerprint

Patellar Dislocation
Ligaments
Osteotomy
Knee
Patellar Ligament
Thigh
Reoperation
Patient Selection

Keywords

  • dislocation
  • medial patellofemoral ligament
  • patella
  • reconstruction.
  • repair

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Medicine(all)

Cite this

Medial patellofemoral ligament repair for recurrent patellar dislocation. / Camp, Christopher L.; Krych, Aaron; Dahm, Diane L.; Levy, Bruce A; Stuart, Michael J.

In: American Journal of Sports Medicine, Vol. 38, No. 11, 11.2010, p. 2248-2254.

Research output: Contribution to journalArticle

Camp, Christopher L. ; Krych, Aaron ; Dahm, Diane L. ; Levy, Bruce A ; Stuart, Michael J. / Medial patellofemoral ligament repair for recurrent patellar dislocation. In: American Journal of Sports Medicine. 2010 ; Vol. 38, No. 11. pp. 2248-2254.
@article{c3b3ba2442414ed6b11d7f021bfbccf4,
title = "Medial patellofemoral ligament repair for recurrent patellar dislocation",
abstract = "Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral patellar dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated. Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral patellar dislocation. Study Design: Case series; Level of evidence, 4. Methods: The records of all patients undergoing MPFL repair for recurrent patellar dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in this study. Clinical, functional, and radiographic outcomes were assessed at an average of 4 years after surgery (range, 2-7 years), using recurrent instability as the primary end point. Results: The success rate of MPFL repair for preventing recurrent dislocations was 72{\%} (21 of 29 knees). Eight patients (28{\%}) experienced a recurrent lateral patellar dislocation. Five of these patients required a reoperation, including two MPFL reconstructions, 1 tibial tubercle osteotomy with MPFL reconstruction, 1 tibial tubercle osteotomy with revision MPFL repair, and 1 revision MPFL repair. At final follow-up, the mean Lysholm and Kujala scores were 86 (range, 42-100) and 92 (range, 57-105), respectively. Postoperative radiographs revealed a mean patellofemoral congruence angle improvement of 27° (range, 5°-44°). The only statistically significant risk factor for failure was nonanatomical MPFL repair at the medial femoral condyle (P =.004). Conclusion: Isolated repair of the MPFL for recurrent patellar instability is associated with a relatively high failure rate, but remains a viable surgical option if surgical technique principles are followed. The clinical success of this operation depends on restoration of the anatomical origin of the MPFL and careful patient selection.",
keywords = "dislocation, medial patellofemoral ligament, patella, reconstruction., repair",
author = "Camp, {Christopher L.} and Aaron Krych and Dahm, {Diane L.} and Levy, {Bruce A} and Stuart, {Michael J.}",
year = "2010",
month = "11",
doi = "10.1177/0363546510376230",
language = "English (US)",
volume = "38",
pages = "2248--2254",
journal = "American Journal of Sports Medicine",
issn = "0363-5465",
publisher = "SAGE Publications Inc.",
number = "11",

}

TY - JOUR

T1 - Medial patellofemoral ligament repair for recurrent patellar dislocation

AU - Camp, Christopher L.

AU - Krych, Aaron

AU - Dahm, Diane L.

AU - Levy, Bruce A

AU - Stuart, Michael J.

PY - 2010/11

Y1 - 2010/11

N2 - Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral patellar dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated. Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral patellar dislocation. Study Design: Case series; Level of evidence, 4. Methods: The records of all patients undergoing MPFL repair for recurrent patellar dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in this study. Clinical, functional, and radiographic outcomes were assessed at an average of 4 years after surgery (range, 2-7 years), using recurrent instability as the primary end point. Results: The success rate of MPFL repair for preventing recurrent dislocations was 72% (21 of 29 knees). Eight patients (28%) experienced a recurrent lateral patellar dislocation. Five of these patients required a reoperation, including two MPFL reconstructions, 1 tibial tubercle osteotomy with MPFL reconstruction, 1 tibial tubercle osteotomy with revision MPFL repair, and 1 revision MPFL repair. At final follow-up, the mean Lysholm and Kujala scores were 86 (range, 42-100) and 92 (range, 57-105), respectively. Postoperative radiographs revealed a mean patellofemoral congruence angle improvement of 27° (range, 5°-44°). The only statistically significant risk factor for failure was nonanatomical MPFL repair at the medial femoral condyle (P =.004). Conclusion: Isolated repair of the MPFL for recurrent patellar instability is associated with a relatively high failure rate, but remains a viable surgical option if surgical technique principles are followed. The clinical success of this operation depends on restoration of the anatomical origin of the MPFL and careful patient selection.

AB - Background: The medial patellofemoral ligament (MPFL) is the primary restraint to extreme lateral displacement and is typically disrupted with an acute lateral patellar dislocation. Patients who fail a comprehensive nonoperative program and experience recurrent lateral patellar instability episodes are candidates for surgical treatment. Current surgical procedures include a variety of proximal realignment techniques, including repair or reconstruction of the MPFL along with distal realignment of the tibial tubercle when indicated. Purpose: The objective of this study was to review the clinical, functional, and radiographic outcomes of isolated MPFL repair for recurrent lateral patellar dislocation. Study Design: Case series; Level of evidence, 4. Methods: The records of all patients undergoing MPFL repair for recurrent patellar dislocation at the Mayo Clinic from 2001 to 2006 were retrospectively reviewed. Twenty-seven patients (29 knees) with an average age of 19 years (range, 11-32 years) were included in this study. Clinical, functional, and radiographic outcomes were assessed at an average of 4 years after surgery (range, 2-7 years), using recurrent instability as the primary end point. Results: The success rate of MPFL repair for preventing recurrent dislocations was 72% (21 of 29 knees). Eight patients (28%) experienced a recurrent lateral patellar dislocation. Five of these patients required a reoperation, including two MPFL reconstructions, 1 tibial tubercle osteotomy with MPFL reconstruction, 1 tibial tubercle osteotomy with revision MPFL repair, and 1 revision MPFL repair. At final follow-up, the mean Lysholm and Kujala scores were 86 (range, 42-100) and 92 (range, 57-105), respectively. Postoperative radiographs revealed a mean patellofemoral congruence angle improvement of 27° (range, 5°-44°). The only statistically significant risk factor for failure was nonanatomical MPFL repair at the medial femoral condyle (P =.004). Conclusion: Isolated repair of the MPFL for recurrent patellar instability is associated with a relatively high failure rate, but remains a viable surgical option if surgical technique principles are followed. The clinical success of this operation depends on restoration of the anatomical origin of the MPFL and careful patient selection.

KW - dislocation

KW - medial patellofemoral ligament

KW - patella

KW - reconstruction.

KW - repair

UR - http://www.scopus.com/inward/record.url?scp=78449275400&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78449275400&partnerID=8YFLogxK

U2 - 10.1177/0363546510376230

DO - 10.1177/0363546510376230

M3 - Article

VL - 38

SP - 2248

EP - 2254

JO - American Journal of Sports Medicine

JF - American Journal of Sports Medicine

SN - 0363-5465

IS - 11

ER -