Section: Monmouth Medical Center News

Breakthrough Robotic Arm Technology at MMC Offers New Level of Accuracy and Reproducibility for Partial Knee and Total Hip Replacement


Drs. Chalnick and Gesell
David Chalnick, M.D., Right, medical director of the Joint Replacement Center at Monmouth
Medical Center, and Mark W. Gesell, M.D., an orthopaedic surgeon and joint replacement specialist
with Monmouth, have introduced breakthrough robotic arm technology for joint replacement
surgery to central and southern New Jersey.

Long Branch, N.J. – Monmouth Medical Center is the first hospital in central and southern New Jersey to introduce robotic-assisted partial knee resurfacing and total hip replacement procedures. The robotic-assisted surgeries are performed using the RIO Robotic Arm Interactive Orthopedic System marketed by MAKO Surgical Corp. RIO is a surgeon-controlled robotic arm system that enables accurate alignment and placement of implants.

“Accuracy is key in planning and performing both partial knee and total hip procedures,” said David Chalnick, M.D., medical director of the Joint Replacement Center at Monmouth Medical Center. “For a good outcome you need to align and position the implants just right. RIO enables surgeons to personalize partial knee and total hip arthroplasties to achieve optimal results at a level of accuracy and reproducibility previously unattainable with conventional instrumentation.”

The RIO System features a patient-specific visualization system and proprietary tactile robotic arm technology that is integrated with intelligent surgical instruments. It assists surgeons in pre-planning and in treating each patient uniquely and with consistently reproducible procedure.

Monmouth Medical Center announced in October that it has reached another robotic surgery milestone by performing the region’s first robotic partial knee replacement surgery to treat osteoarthritis of the knee. This latest example of pioneering robotic surgery at Monmouth Medical Center follows the hospital’s recent milestone of performing more than 2,000 robotic surgeries.

Partial knee resurfacing is a minimally invasive treatment option for adults living with early to mid-stage osteoarthritis that has not yet progressed to all three compartments of the knee. The first procedures were performed by Dr. Chalnick and Mark W. Gesell, M.D., an orthopaedic surgeon and joint replacement specialist with Monmouth.

A pre-surgical plan is created based on a CT scan of the patient’s own knee, and the surgeon uses the robotic arm during surgery to resurface the diseased portion of the knee, sparing healthy bone and surrounding tissue for a more natural feeling knee. An implant is then secured in the joint to allow the knee to move smoothly again.

In November, Monmouth Medical Center introduced robotic-assisted total hip replacement surgery, which utilizes the RIO System for visualization of the joint and biomechanical data to guide the bone preparation and implant positioning to match the pre-surgical plan. After first preparing the femur or thighbone, the surgeon uses the robotic arm to accurately ream and shape the acetabulum socket in the hip, and then implant the cup at the correct depth and orientation. The surgeon then implants the femoral implant.

“This system offers the confidence of more accurate cup placement and accurate leg length restoration,” Dr. Gesell says. “We are proud to be the first in the region to offer this innovative treatment option to our patients.”

To learn more about robotic-assisted joint replacement surgery or to learn about upcoming patient information seminars, call the Joint Replacement Center coordinator at 732-923-7971.

About Monmouth Medical Center
Located in Long Branch, N.J., Monmouth Medical Center, a Barnabas Health facility, along with The Children’s Hospital at Monmouth Medical Center, is one of New Jersey's largest academic medical centers and has been a teaching affiliate of Philadelphia’s Drexel University College of Medicine for more than 40 years. From its earliest days, Monmouth Medical Center has been a leader in surgical advancement and has introduced many technological firsts to the region, including robotic surgery and other minimally invasive techniques. The hospital is routinely recognized by HealthGrades, the nation’s largest premier independent health care quality company, for excellence in both emergency medicine and maternity care. U.S. News & World Report has recognized Monmouth as a regional leader in cancer, geriatrics, gynecology, neurology and neurosurgery. For more information on Monmouth Medical Center, visit

Date: November 14, 2013

Contact: Elizabeth Brennan


Categories: Orthopedic,Press Releases