Meet Our SurgeonLonnie D. Davis, MD

  • Dr. Davis is like no other...his compassion and kindness is superior! Easy to talk to, explains everything, open to all questions and takes time with you.

    Bonnie - Fairfax VA

  • He did an excellent job on my surgery and follow up. All was as expected. He answers questions thoroughly but does not waste patient time.

    Irene - Reston VA

  • Given the extent of my injury and accident, Dr. Davis did a miraculous job getting me back to normal. He always kept me informed of what to keep an eye on, and how to address certain aspects of my new life adjusting to this injury.

    Jake - Reston VA

  • He was very knowledgeable and excellent at translating what the issue with my knee was from medical terminology into layman's terms. He was extremely thorough and with this being my third opinion on my knee, I immediately decided I would continue through the surgery process with Dr. Davis.

    Eva - Washington DC

  • He is fantastic! Very kind. Smart. Answered my questions. I know nothing. And he was so patient. Treated my son with wonderful kindness and dignity. Dr. Davis is a good man. Glad to have met him! Will definitely go to his office in the future if we have a need for it.

    Jodi - Reston VA

  • It was my first appointment with Dr. Davis and he impressed me with his concern for my wellbeing. He is extremely thorough, spends plenty of time with you and has an excellent bedside manner. I would recommend him to anyone with a sports related injury.

    Lauren - Alexandria VA

  • I'm pretty active and have seen Dr. Lonnie Davis for a number of sports-related injuries for the past few years. I've seen him for a torn ACL, stress fracture in the foot, rock-climbing hand and ankle injuries, etc. I was really impressed with how well my ACL surgery, care and recovery went. He's been great at diagnosing the problems and getting me back to sports.

    Jennie - Annandale VA

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Lonnie D Davis MD

Osteochondral Allograft


An osteochondral allograft is a piece of tissue taken from a diseased donor to replace damaged cartilage that lines the ends of bones in a joint. A section of cartilage and bone is removed, shaped to precisely fit the defect and then transplanted to reconstruct the damage.

Disease Overview

The articulating surfaces of all the joints in the body are lined by a soft tissue called articular cartilage, which cushions the ends of bones. This allows easy gliding of the bones during movement of the joint. Injury and wear-and-tear can damage the cartilage, making it rough and sometimes expose the underlying bone. This leads to painful rubbing of the bones of the joint and disability.


Osteochondral allograft is indicated for:

  • Large area of damage, within 15 to 35 mm
  • Having symptoms of pain, swelling and catching
  • Localized, full-thickness injury
  • Patients under 50 years of age
  • Active patients with high physical demand
  • Associated with lesions such as
  • Osteochondritis dissecans (lack of blood supply separates a segment of bone from its surrounding)
  • Avascular necrosis (death of bone tissue)

Surgical procedure

The implantation of osteochondral allografts is usually performed through an open incision, under general or spinal anesthesia. An incision is made to expose the joint defect. The size of the defect is then measured and a portion of the cartilage and underlying bone is removed.

A fresh allograft taken from a diseased donor is sterilized, prepared in the laboratory and tested for probable disease transmission. It is then trimmed with an oscillating saw to match the size of the prepared defect.

The allograft is then gently press-fit into the defect created in the recipient bone.

It can be further stabilized with metallic screws and pins.

The incision is closed and dressing applied to the joint.

Post-Operative Care

Following the surgery, a brace may be applied for the first 2 weeks. Your surgeon will prescribe medication to reduce pain. You will be instructed to use crutches and limit bearing weight for 6 to 8 weeks. Early movement is encouraged, and you will be gradually introduced to physical therapy, which will be continued for 8 to 12 weeks.

You may be able to return to your activities in 6 to 12 months.

Advantages & Disadvantages

When compared to osteochondral autografts (tissue taken from another part of your body), osteochondral allografts help reconstruct large three-dimensional articular defects and overcome the possibility of defect at the donor site.

However, osteochondral allograft is associated with a higher risk of immune-mediated graft rejection and disease transmission from the diseased donor and the transplantation of the graft is a more invasive procedure when compared to osteochondral autografts. It is also difficult to obtain fresh donor specimens with the required cartilage thickness.

Risks and complications

As with all surgical procedures, the transplantation of osteochondral allografts may be associated with certain risks and complications such as:

  • Infection
  • Pain
  • Bleeding
  • Implantation failure
  • Stiffness
  • Blood clots

Useful Links

  • The American Academy of Orthopaedic Surgeons
  • Medical Society of Virginia
  • American Orthopaedic Society for Sports Medicine
  • American Board of Orthopaedic Surgery
  • mid atlantic shoulder elbow society
  • mclean high school
  • STOP Sports Injuries