Minimal Surgical Intervention for Early OA of the Knee in Athletes:

Jeffrey Halbrecht, MD San Francisco

Arthur Itis z z z z z z z

55 yo male Investment banker Competitive runner s/p partial menisectomy ….Way out of his envelope Wants surgery so he can stay active What to do ????

What defines Early OA knee? When is it too late ???? z z z z z z z

Joint space narrowing? Subchondral sclerosis? Bony deformity ( Fairbanks changes)? Age of patient ? ( what is the definition of too old ?...) Varus alignment? Osteophytes? Bone on bone? – With or without weight bearing?

What are we treating? z z z z z z

Bone pain ? Synovitis? Loose bodies? Loss of motion? Locking, catching? Loss of alignment?

Who really needs a TKR ? Traditional Thinking…. z z z z z z

Any exposed bone on both sides of the joint Large extensive areas of G4 Associated varus Osteophyte formation Older patient But…are there other options ????

Baby Boomer Knee Mantra: z

“total knee… not me !”

Buying Time…. z z z z

New perspective .. Living longer More active Want temporizing procedures that allow greater activity level!

Surgical Options z z z z z z

Arthroscopy Biological Resurfacing Spacers Localized arthroplasty HTO Unicompartmental Arthroplasty

Arthroscopy for OA.. When is it Indicated.. Well, What do we mean by Arthroscopy? z z z

Lavage.. Debridement Removal loose body Partial meniscectomy – (deg men tear with unstable fragments)

z z z

Resection of osteophytes Capsule release Microfracture

N Engl J Med. 2002 Jul 11;347(2):8111;347(2):81-8

A controlled trial of arthroscopic surgery for osteoarthritis of the knee. Moseley JB, JB, et al.

BACKGROUND: Many patients report symptomatic relief after undergoing arthroscopy of the knee for osteoarthritis, but it is unclear how the procedure achieves this result. We conducted a randomized, placebo-controlled trial to evaluate the efficacy of arthroscopy for osteoarthritis of the knee. METHODS: A total of 180 patients with osteoarthritis of the knee were randomly assigned to receive arthroscopic debridement, arthroscopic lavage, or placebo surgery. Patients in the placebo group received skin incisions and underwent a simulated debridement without insertion of the arthroscope. Patients and assessors of outcome were blinded to the treatment-group assignment. Outcomes were assessed at multiple points over a 24-month period with the use of five self-reported scores--three on scales for pain and two on scales for function--and one objective test of walking and stair climbing. A total of 165 patients completed the trial. RESULTS: At no point did either of the intervention groups report less pain or better function than the placebo group. For example, mean (+/-SD) scores on the Knee-Specific Pain Scale (range, 0 to 100, with higher scores indicating more severe pain) were similar in the placebo, lavage, and debridement groups: 48.9+/-21.9, 54.8+/-19.8, and 51.7+/-22.4, respectively, at one year (P=0.14 for the comparison between placebo and lavage; P=0.51 for the comparison between placebo and debridement) and 51.6+/-23.7, 53.7+/-23.7, and 51.4+/23.2, respectively, at two years (P=0.64 and P=0.96, respectively). Furthermore, the 95 percent confidence intervals for the differences between the placebo group and the intervention groups exclude any clinically meaningful difference.

CONCLUSIONS: In this controlled trial involving patients with osteoarthritis of the knee, the outcomes after arthroscopic lavage or arthroscopic debridement were no better than those after a placebo procedure.

CMS Decision Memorandum z

In July 2003, CMS posted a decision memorandum that outlined its coverage position on arthroscopy for the osteoarthritic knee. CMS determined "arthroscopic lavage alone is not reasonable and necessary for patients with osteoarthritis of the knee." CMS also determined "arthroscopic debridement is not reasonable and necessary for patients presenting with knee pain only or with severe osteoarthritis (Outerbridge classification III or IV)."

Critique of Mosely Article z z z z z z z z

Unvalidated outcome measure created specifically for that study (KSPS knee specific pain score) Selection bias ( 44% refused to participate) VA population with issues of secondary gain /disability Lavage and debridement only- does not address other arthroscopic procedures…. Included patients with bone on bone w no mechanical sxs Did not include weight, ROM or effusion data 79 % men Older group ( up to age 75)

JAAOS Recommendation With proper selection, patients with early degenerative arthritis and mechanical symptoms of locking or catching can benefit from arthroscopic surgery. J Am Acad Orthop Surg. 2002 Sep-Oct;10(5):356-63

Hunt SA, Jazrawi LM, Sherman OH.

AAOS Clinical Guideline Support Document 2003 z

If AVN is not present and there is not significant joint space narrowing, arthroscopic debridement can be considered…. For the treatment of patients with mechanical symptoms….

How Long Does Benefit of Scope Last? Survivorship of Scope w OA: Effect of Age Arthroscopic washout of the knee--a 5-year survival analysis. Bernard J, Lemon M, Patterson MH. Knee. 2004 Jun;11(3):233-5. Arthroscopy and washout of the knee is commonly performed for early osteoarthritis. Very little information exists regarding long-term prognosis, especially in terms of avoidance of further surgery. Using a prospectively gathered database, 100 consecutive patients having knee arthroscopy with a finding of OA between 1991 and 1993 were identified and their outcome at 5 years ascertained. Ninety-nine patients with 100 arthroscoped knees were identified. Fifty-eight had isolated medial compartment disease and six had isolated lateral compartment disease. In 36, both compartments were affected. Eighteen knees had further major surgery during follow up; 11 had total knee replacement, four had high tibial osteotomy and three had unicondylar knee arthroplasty. Those requiring surgery were significantly older (62 cf. 53 years, P=0.008). Meniscectomy was not an important risk factor (chi2, P=0.67). The rate of knee survival without operation at 5 years was much lower in those aged over 60 years than in those younger (68% cf. 89%). (chi2, P=0.02). Only

18% of patients progress to major knee surgery within 5 years of arthroscopic washout for osteoarthritis. Age greater than 60 years worsens the prognosis considerably.

Consensus: Debridement/Lavage Works for Early OA With Mechanical Symptoms.. Especially younger patients with normal mechanical axis What else can be accomplished with arthroscopy for OA ? z What about other, non lavage , arthroscopic treatments ? z

OA and Microfracture Patient satisfaction and outcome after microfracture of the degenerative knee Miller BS, Steadman JR, Briggs KK, Rodrigo JJ, Rodkey WG. J Knee Surg. 2004 Jan;17(1):13-7.

Age 40-70..F/u avg 2-5 yrs 81 pts 13 required repeat scopes at 5 years

All subjective parameters measured (pain, swelling,

limping, walking, stairs, sport level, and activities of daily living) demonstrated significant improvement over preoperative status (P6 mo.

New Spacer Options z

Orthoglide

Lower profile, Stabilizing lip

z

Conformis

Custom design

Localized Arthroplasty z

Arthrosurface

z

Q’s – Contact surface wear – Loosening

The Future: Genetic Treatments? “Augmentation of cartilage ECM biosynthesis may be possible by employing the principles of gene transfer using suitable vectors …” – Gene-mediated restoration of cartilage matrix by combination insulin-like growth factor-I/interleukin-1 receptor antagonist therapy. z

Nixon AJ et al. Gene Ther. 2005 Jan;12(2):177-86

The Future : Stem Cells ? Chondrogen Chondrogen Preclinical Data:

Chondrogen™ “Our research demonstrates that injection of adult stem cells promotes regeneration of the meniscus and protects the articular cartilage from degeneration leading to osteoarthritis. “

Untreated Control

Chondrogen Treated

Suggestions for Arthur Itis ?... z

"Inside every older person is a younger person... wondering what the hell happened."

THANK YOU!

ACI/ HTO Minimal joint space narrowing z Physiologic varus z Single vs 2 stage z Opening wedge z

Autologous Chondrocyte Implantation Concomitant Procedures in Complex Knees 34 y/o male irrigation repairman with MFC defect, medial compartment narrowing, failed microfracture

Autologous Chondrocyte Implantation Concomitant Procedures in Complex Knees 38 y/o male fork-lift driver with MFC defect, mild varus alignment, mild medial compartment narrowing, intact medial meniscus.

TX: Medial Opening wedge HTO, Puddu plate fixation, ACI

Carticel Repair: Complex Lesions Conclusions Salvage Cases z Alignment , Stability, Meniscus for success z Results Promising z

THANK YOU