ACMH offers comprehensive services for the full spectrum of musculoskeletal conditions

The ACMH | Armstrong Orthopedic Associates practice specializes in the treatment of arthritis, musculoskeletal conditions and sports medicine. Patients are cared for using the most current operative and non-operative techniques.


The Armstrong Orthopedic Associates' philosophy on treating patients with arthritis is that before considering surgery, all patients should try a comprehensive approach to non-surgical treatment. Those who fail to find success with conservative treatment and elect to have surgery are thoroughly evaluated with respect to general health, lifestyle, living situation and occupation before the doctor and patient choose the appropriate surgery.

Dr. Hepner and Dr. Formaini have trained at some of the best orthopedic hospitals in the country. In addition, their treatment techniques are on the leading edge, utilizing progressive programs designed to achieve optimal results with physician and patient working as a team toward the goal of full recovery.

Bert Hepner, DO is designated as a UPMC Health Plan Hip and Knee Joint Replacement Surgery Center of Excellence surgeon at Armstrong County Memorial Hospital based on his commitment to quality care and outstanding patient experience.

Surgical Solutions

When surgery is necessary to correct an orthopedic disorder or injury, ACMH Hospital has state-of the-art operating rooms. Equipped with the most advanced instrumentation and equipment, these operating rooms are staffed by highly-trained professionals who assist Dr. Hepner and Dr. Formaini during surgery, and monitor patients in the recovery room. If surgery is recommended, the operative plan and the recovery process are thoroughly explained to the patient by the physician.

Physical rehabilitation is an integral part of successful recovery, whether it is used as the primary treatment for a disorder or follows a surgical procedure to enhance the healing process. With this in mind, physical therapists (along with the doctors) design individual exercise programs for each patient so that optimum recovery is achieved as soon as possible.


Help to streamline your appointment with Armstrong Orthopedic Associates by downloading and fillling out these forms prior to your arrival. Remember to bring them in with you to your appointment.






Available services include:
  • Total shoulder replacement
  • Reverse total shoulder replacement
  • Total knee replacement
  • Total hip replacement
  • Arthroscopic rotator cuff repair
  • Total elbow replacement
  • Arthroscopic shoulder, knee & elbow surgery
  • ACL reconstruction
  • Minimally invasive hand surgery
  • Minimally invasive elbow & tendonitis surgery
  • Fracture surgery
  • Carpal tunnel surgery
  • Cubital tunnel surgery

Have you ever experienced your vehicle when it is out of alignment—your car movement doesn’t feel right and your tires may produce uneven wear, requiring you to need a new set? Joints in the body work in a very similar fashion.

When patients require a total joint replacement, proper placement and alignment of the implant is critical to the implant’s overall longevity and function.  ExactechGPS® Guided Personalized Surgery combines surgeon expertise with an advanced computer system, similar to a navigation device in your car, to perform your joint replacement surgery with a goal of advanced accuracy and precision.

ExactechGPS pairs surgeon expertise with an advanced computer system to perform the patient’s shoulder surgery with a goal of improved accuracy and precision.


·         The ExactechGPS Shoulder Application’s preoperative planning tool is designed to help surgeons understand their patient’s anatomy prior to surgery and plan the surgery through a virtual simulation

·         Surgeons can execute their plan in real time during the surgery based on a 3-D anatomical model of the patient’s shoulder, making adjustments as needed

·         Gives greater visibility to the shoulder anatomy, allowing for more consistent and accurate implant placement.

·         Paired with Exactech’s Equinoxe Shoulder System, which has demonstrated excellent biomechanics and outcomes in its more than 10 years of use, as proven by more than 80 peer-reviewed clinical studies

ExactechGPS® (Guided Personalized Surgery) is the latest advancement in orthopedic technology that provides Dr. Formaini with real-time computer guidance during total shoulder replacement surgery. This advanced platform combines surgeon expertise with virtual planning to allow for improved accuracy and precision during your shoulder surgery. The technology enables minimally invasive techniques and implant alignment personalized to your unique anatomy.

With Dr. Nathan Formaini and ExactechGPS® Guided Personalized Surgery, you can take advantage of the latest in technology for your total joint replacement surgery. For more information or to schedule an appointment, contact Armstrong Surgical Associates at 724-545-2205.

A New Approach - The Rotation Medical Rotator Cuff System


Until now, surgeons have had limited ability to address rotator cuff injury at earlier stages of degeneration. In addition, traditional rotator cuff repair procedures that involve suturing tendon to bone are associated with long rehabilitation, significant lifestyle interruption and variable outcomes. As a result, many people choose to forego surgery until pain is severe and range of motion is significantly impaired.

However, as rotator cuff disease progresses, it can become increasingly difficult for your surgeon to repair. The Rotation Medical Rotator Cuff System is a new technology designed to improve the treatment of rotator cuff disease:

  • The technology can be used in earlier stages of rotator cuff disease to slow progression of your rotator cuff disease. Addressing the injury earlier can shorten recovery time, reduce pain and improve quality of life. Intervening before a full tear has occurred may also decrease your chances of requiring traditional rotator cuff surgery.
  • The technology can also be used in conjunction with traditional repair procedures to improve the tendon biology and decrease the chance of your rotator cuff tendon re-tearing.

What Is It?
The technology includes a collagen based bioinductive implant about the size of a postage stamp. This implant is delivered arthroscopically through a small incision over the location of your rotator cuff tendon injury. Your physician will secure it in place with small staples.

Designed for Life


As today’s patients seek more active lifestyles than traditional patients, knee and hip implants will be expected to endure more stress without succumbing to wear. However, the functional lifetime demand of younger and active patients is 10-fold greater than the estimated functional lifetime of traditional polyethylene. VERILAST™ Technology from Smith & Nephew is the only bearing technology with published results of 45 Million Cycles of hip and knee in-vitro wear simulation testing, R3™ Hip System and LEGION™ Primary Knee System, respectively. This means the replacement may be expected to provide improved wear performance. More importantly, if implanted earlier, it may restore patients to their active lifestyles sooner. 

Frequently Asked Questions

How do I make an appointment?
Please call 724-545-2205 to make an appointment. Except in the case of an emergency, it is not our policy to see patients without an appointment. We understand that it is tempting to bring someone with you in hopes that they can be seen as well during your appointment time, but in fairness to those who have waited, we are not able to see anyone without a scheduled appointment. We appreciate your cooperation in this matter.

What do I need to bring with me?
Please bring the following items with you to appointments:

  • Your insurance card or other health coverage information. Some insurance carriers require you to have a referral or primary care physician authorization before treatment is given. Please check with your carrier if you are in doubt.
  • X-Rays or MRI’s not older than twelve or eighteen months (if available).
  • Clinic notes or operative reports from your referring physician that relate to your condition.

Can I obtain my medical records from Armstrong Orthopedic Associates?
If you need to request certain medical records from our office, please be aware that the request could take ten days to two weeks before you receive the information. We will make every effort to fulfill all medical records requests as quickly as possible.

How can I pay?
Cash and check are accepted. Co-pays are due upon arrival.

What if I need surgery?
If you require surgery to correct an orthopedic disorder, Dr. Hepner will thoroughly explain the operative procedure, the recovery process and the type of rehabilitation program you will need. Our staff will pre-certify your procedure and discuss any financial implications with you.

What can I do if the office is closed?
We always have a physician on call in case of after hour emergencies. If you need to contact a physician after hours, call the ACMH Hospital switchboard at 724-543-8500. Routine prescription refills will be filled between the hours of 9:00AM and 5:00PM Monday through Wednesday, 9:00AM and 1:00PM Thursdays and between 9:00AM and 3:00PM Fridays.

Tenex Minimally Invasive Procedures
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Orthopedic Surgery Team

Jamie Brown, CRNP
Jamie Brown, CRNP
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Nathan Formaini, DO
Nathan Formaini, DO
Shoulder Replacement
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Bert Hepner, DO
Bert Hepner, DO
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Donald Ravasio, DO
Donald Ravasio, DO
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Matt Starr, CRNP
Matt Starr, CRNP
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Allison Zellefrow, PA
Allison Zellefrow, PA
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Armstrong Orthopedic Associates

77 Glade Drive
Kittanning, PA 
Phone: 724-545-2205
Fax: 724-545-2600
Monday - Thursday: 8:00AM - 5:00PM
Friday: 8:00AM - 12:00PM