1. 25e Journée de la Recherche POES
Evaluation of reconstructive surgery using artificial ligaments in 71 acute knee dislocations.
25e Journée de la Recherche POES
Montreal 2005

2. Authors Philippe Dahan M.D. Eros De Oliveira Pht. Julio Fernandes M.D.
Greg Berry M.D.
Max Talbot M.D.
Pierre Ranger M.D.

3. G
Mondor.S.

4. KNEE DISLOCATION
CATASTROPHE

5. KNEE DISLOCATION
Reconstructive surgery gives better results! (Debmond and al. Am J Knee Surg 2001)
Early reconstruction better than late !!
(Wascher and al. Am J Sports Med 1999)
NO CONSENSUS on surgical treatment !!
What to reconstruct? ACL? PCL? 1 or 2 bundles?
Allograft vs. Autograft vs. Synthetic
The Feared Complication:
Arthrofibrosis (ankylosis)

6. KNEE DISLOCATION OBJECTIVES ARE FULFILLED :
USING SYNTHETIC
OBJECTIVES ARE FULFILLED :
Reduction (recentered knee)
Fixation (no harvest)
Immediate mobilization
Scaffolding (collagen growth)
(Healing potential of different structures...)

7. Ligament Advanced Reinforcement System
LARS
Ligament Advanced Reinforcement System

8. Objective H.S.C. Montreal: 6/96 9/04
The purpose of this study is to evaluate the outcome and survival of acute cruciate reconstruction using LARS ligaments after knee dislocations.

9. H.S.C. Montreal: 6/96 9/04 1 patient had normal ACL & PCL
71 ACUTE KNEE DISLOCATIONS
10 patients excluded:
1 patient had normal ACL & PCL
1 patient had TKR
8 patients lost to follow-up

10. H.S.C. Montreal: 6/96 09/04 61 patients 47 ♂ 14 ♀ Mean age: 36.1 years
2 bilateral injuries
63 knee dislocations
61 patients 47 ♂
14 ♀
Mean age: 36.1 years

11. 63 knees
61 patients reviewed 46
High velocity = 15
Low velocity =

12. Management All patients managed initially according to ATLS.
Arthrotomy, primary repair and reconstruction of ACL, PCL (1 vs. 2 bundles), PLC and Collaterals using LARS.
Intensive rehabilitation protocol in post-op.
(Richter and Al. “..most important prognostic positive prognostic factor.”Am J Sports Med 2002)

13. Time from trauma to surgery
All surgeries were performed in a acute setting (< 6 wks)
Average time from injury to surgery = 12,2 days

14. FOLLOW UP 2 to 6 months = 14 pts. 6 months to 2 years = 18 pts.

15. EVALUATION Range of Motion TELOS Questionnaires: LYSHOLM
IKDC 2000 knee*
SF-36 quality of life*
A.C.L.
P.C.L. at 20° and 90° of flexion *
(usually used to evaluate reconstruction of a single knee ligament injury)

16. RESULTS

17. Range of motion X Motion Flexion Extension normal + 130.7° - 2.0°
injury °
- 1.1°

18. ROM

19. Laxity

20. Laxity

21. Laxity

22. Laxity

23. LYSHOLM RATING SCALE TOTAL = 100 Instability (25) Pain (25)
Locking (15)
Swelling (10)
Stairs (10)
Squatting (5)
Limping (5)
Walking aid (5) (cane,crutches)
TOTAL = 100

24. Questionnaires
(n=46)
(n=46)
(n=46)

25. Questionnaires
AVERAGE

26. KNEE DISLOCATION
DISCUSSION
The only statistical difference (p<0.05) found was on IKDC scores only.

27. KNEE DISLOCATION DISCUSSION ROM
We did not show significant loss of ROM using LARS artificial ligament for acute reconstruction of knee dislocation.

28. This stability seem to persist over time.
KNEE DISLOCATION
DISCUSSION
STABILITY
Laxity exams showed good anterior and posterior stability when using LARS for reconstruction of acutely dislocated knees.
This stability seem to persist over time.
The 2 bundles PCL reconstruction technique seems to give better posterior stability.

29. FUNCTION and QUALITY of LIFE
KNEE DISLOCATION
DISCUSSION
FUNCTION and QUALITY of LIFE
Patients seem to subjectively get better with time even though knee dislocation is seen as a catastrophe when it happens.
Comorbidity can partially explain the lower scores.
The Lysholm scale seems to be a good questionnaire to evaluate knee disocations.
Additional evidence of the validity of the IKDC scale for knee dislocation is necessary. (Harner et Al. JBJS 2004)

31. KNEE DISLOCATION CONCLUSION
Complete total knee dislocation treated acutely with LARS artificial ligaments seems to give:
• good objective results (laxity evaluation and R.O.M.)
• good subjective results (Lysholm)

32. Results seem to be constant with time.
KNEE DISLOCATION
CONCLUSION
Results seem to be constant with time.

33. KNEE DISLOCATION Min. 10 yrs follow up to evaluate LARS durability.
FUTURE RESEARCH
Min. 10 yrs follow up to evaluate LARS durability.
Compare 1 and 2 bundles PCL reconstruction for posterior laxity.
Corellations with e.g. type of injury, comorbidity, age….

34. Thank
You

35. References
Talbot M, “Knee dislocations: experience at the Hôpital du Sacré-Cœur de Montréal”, J Can Surg 2004
Debmond BT, “Operative treatment of knee dislocations: a meta-analysis”, Am J Knee Surg 2001
Wascher DC, “Reconstruction of anterior and posterior cruciate ligaments after knee dislocation: results using fresh-frozen irradiated allografts” Am J Sports Med 1999
Richter M, “Comparison of surgical repair or reconstruction of the cruciate ligaments vs. nonsurgical treatment in patients with traumatic knee dislocation” Am J Sports Med 2002
Harner CD, “Surgical management of knee dislocations” JBJS Am 2004

36. References
Yeh WL, “Knee dislocations: treatment of high-velocity knee dislocation” J Trauma 1999
Jardin C, “Fiabilité de l’arthromètre KT-1000 pour la mesure de laxité antérieure du genou: analyse comparative avec le Telos de 48 reconstructions du ligamnet croisé antérieur et reproductibilité intra- et interobservateur” Revue de Chirurgie Orthopédique 1999
Wong CH, “Knee dislocations: a retrospective study comparing operative vs. closed immobilization treatment outcomes” Knee Surg, Sports Trauma, Arthroscopy 2004

37. Laxity

38. Laxity

39. Laxity

41. Post-Op Intense Protocol Hinged brace for collaterals NWB 6 wks
ROM first, Strenght after.
Followed by proprioception and sports training.