Why Us

Our Orthopedic Specialists Know The Latest Technologies
And Surgical Techniques For Treating Hip And Knee Injuries And Conditions


The field of orthopedics is growing rapidly, and our orthopedic specialists know the latest technologies and surgical techniques for treating hip and knee injuries and conditions. Minimally invasive surgical techniques help to respect, retain, and restore the body’s original anatomy, which allow for better patient outcomes and faster recovery times.

Partial Knee Replacement

As an orthopedic knee surgeon, Nicholas Callahan, DO, is one of only a few surgeons in Northeast Ohio who takes the time to determine whether a totally knee replacement procedure is necessary. Only replacing the portion of the knee that has arthritis helps to preserve the normal anatomy in the remainder of the knee and can lead to a more natural feeling.

Kinematic Alignment for Knee Replacement

Dr. Callahan uses the kinematic alignment method when performing knee replacement surgeries. This customized method positions the knee with the goal of restoring the native, pre-arthritic joint lines and rotational axes of a patient’s knee. Although intuitive, this is not the way most traditional total knee replacements are performed. Watch our webinar to learn more.

AMIS Technique for Hip Procedures

Dr. Callahan also practices the AMIS technique for hip procedures. This minimally invasive anterior approach protects and preserves the periarticular structures of the hip and delivers a huge advantage to the patient: significantly shortened rehabilitation time. His bikini incision method which was designed by a plastic surgeon but adapted for hip replacement surgery, leaves a lesser scar, and heals better than the traditional incision used by most hip surgeons. Visit our blog to learn more.



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Dr. Callahan is awesome!!! He is patient and explains everything. Everyone I dealt with in the office was great.


Dr. Callahan is a very thoughtful and skilled Orthopedic Surgeon. He listens to his patients (never rushes through the appointment) and recommends the best solution. I would trust him with all of my family members—as he treats his patients as if they were his own family.


Dr. Callahan takes the time to listen. You can tell he genuinely cares and is detailed when it comes to explaining the procedure and recovery.