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Matrix-assisted Autologous Chondrocyte Transplantation for Remodeling and Repair of Chondral Defects in a Rabbit Model
Published on: May 21, 2013
Autologous chondrocyte implantation: a systematic review
Joshua D Harris1, Robert A Siston, Xueliang Pan
1Division of Sports Medicine Cartilage Repair Center, Department of Orthopaedics, The Ohio State University Sports Medicine Center, 2050 Kenny Road, Suite 3100, Columbus, OH 43221-3502, USA.
The Journal of Bone and Joint Surgery. American Volume
|September 17, 2010
Summary
Autologous chondrocyte implantation (ACI) and other cartilage repair techniques offer short-term knee restoration. Patient and defect factors significantly influence ACI outcomes, impacting clinical success.
Area of Science:
- Orthopedics
- Regenerative Medicine
- Biomedical Engineering
Background:
- Cartilage defects in the knee are common and can lead to pain and dysfunction.
- Various surgical techniques exist for cartilage repair, including autologous chondrocyte implantation (ACI), microfracture, and osteochondral autograft.
- The optimal technique and factors influencing outcomes remain areas of active investigation.
Purpose of the Study:
- To evaluate the current literature comparing autologous chondrocyte implantation (ACI) with other cartilage repair procedures.
- To determine if specific generations of ACI demonstrate superior clinical outcomes, imaging results, or durability.
- To identify patient- and defect-specific factors affecting outcomes after ACI versus alternative cartilage restoration techniques.
Main Methods:
- A systematic review of Level-I and II studies was conducted.
- Studies compared ACI with other cartilage repair techniques or examined intergenerational ACI studies.
- Methodological quality was assessed using Delphi list and modified Coleman methodology scores, with effect size analysis performed.
Main Results:
- Thirteen studies (917 subjects) were analyzed; methodological quality improved over time.
- All techniques showed improvement over preoperative status; ACI showed better short-term outcomes than microfracture in some studies, but microfracture outcomes sometimes deteriorated.
- ACI and osteochondral autograft had equivalent short-term outcomes, with faster improvement for osteochondral autograft. Younger patients with fewer prior surgeries and larger defects (>4 cm²) had better outcomes with ACI.
Conclusions:
- Knee cartilage repair using microfracture, ACI, or osteochondral autograft provides short-term success.
- Clinical outcomes are influenced by patient-specific and defect-specific factors.
- Further research may refine patient selection and technique optimization for ACI.
