MACI: Proven in
efficacy demonstrated in 3 key areas
A durable repair tissue
In the SUMMIT Trial, at 2 years post-treatment, most patients in the MACI group had nearly normal (Grade II) or normal (Grade I) overall repair assessment tissue with features similar to normal articular cartilage.1
Pain and function
The MACI implant demonstrated statistically signficantly greater improvement in both pain and function than microfracture at 2 years as shown in Knee Injury and Osteoarthritis Outcome Score (KOOS).1
In the SUMMIT follow-up extension study, the mean KOOS pain and function scores seen in both treatment groups at Year 5 were consistent with those seen at Year 2.2
In a responder analysis, the proportion of subjects with at least a 10-point improvement in both KOOS Pain and Function (SRA) was greater in the MACI group (63/72=87.5%; 95% CI [77.6%, 94.1%]) compared with the microfracture group (49/72=68.1%; 95% CI [56.0%, 78.6%]).1
Safety demonstrated in the SUMMIT trial
No unexpected safety events were reported.1
Most treatment-emergent adverse reactions were of moderate or mild intensity, the most common being arthralgia (51.4%), back pain (11.1%), and joint swelling (9.7%).1
Fewer treatment-emergent serious adverse reactions were reported with MACI than with microfracture. Only 13 adverse reactions in the MACI group (n=72) were considered serious versus 25 adverse reactions in the microfracture group (n=72).¹
Patients in the microfracture group experienced more cases of treatment failure, cartilage injury, and arthralgia.1
The safety of MACI in patients with malignancy in the area of cartilage biopsy or implant is unknown. Expansion of present malignant or dysplastic cells during the culturing process or implantation is possible.
1. Saris D, Price A, Widuchowski W, et al. Matrix-applied characterized autologous cultured chondrocytes versus microfracture: Two-year follow-up of a prospective randomized trial. Am J Sports Med. 2014;42(6):1384-94.
2. Brittberg M, Recker D, Ilgenfritz J, et al., Matrix-Applied Characterized Autologous Cultured Chondrocytes Versus Microfracture Five-Year Follow-up of a Prospective Randomized Trial. Am J Sports Med. 2018;46(6): 1343-1351.