Dr. Peter S. Johnston, M.D.

“I have been using true transosseous tunneled fixation for 90% of my arthroscopic rotator cuff repairs since starting practice nearly 7 years ago, both in a hospital setting and in a surgeon owned ambulatory surgery center.  I have paired with anchor fixation for large tears using a hybrid technique as well.

I have repeatedly recognized the value of tunneling in the revision setting.  Working around existing anchors or large cystic defects at the articular margin or laterally on the greater tuberosity from previous anchors is a huge advantage to tunneling.

I cannot provide any data at this point, but my gestalt comparing post-operative pain, is a substantial difference favoring tunneled repair versus anchored repair.

I was introduced to the Tensor Tunneler and quickly recognized the advantages over competitive tunneling devices.  In terms of the device itself, it is straight forward and easy to use, but the dramatic difference is the predictability of capture of the shuttling suture in the tunneler.  This reproducibility has improved my overall case efficiency.  Further, the cost of the passing needle is far less than the system I used previously and has delivered increased case reimbursements at the ambulatory surgery center.”


Dr. Peter Johnston joined Southern Maryland Orthopaedics in September 2011. He was born and raised in Bloomfield Hills, Michigan. He received his Bachelors of Science degree in Neurosciences at the University of Michigan in Ann Arbor, MI. He completed his medical training at Wayne State University in Detroit, MI where he graduated with honors.

Dr. Johnston completed his orthopaedic internship at the Detroit Medical Center/Wayne State University School of Medicine and then moved to Chapel Hill, NC where he completed his formal orthopaedic surgery training at the University of North Carolina. At the University of North Carolina, he received the Resident of the Year Award as well as the William C. Patton Chief Resident distinction for excellence in teaching as nominated by his colleagues. He participated in sports coverage and care of the Division I athletes at UNC and the local high schools.

After completing his residency, Dr. Johnston spent a year as a fellow at the prestigious Rothman Institute at Thomas Jefferson University in Philadelphia, PA sub-specializing in shoulder and elbow surgery. While at the Rothman Institute, he focused on treatment of complex shoulder and elbow conditions including joint replacement for arthritis, instability, fractures, rotator cuff and labral tears, and triceps and biceps tendon tears. He also spent time traveling in France, after fellowship, learning from world-renowned leaders in shoulder and elbow surgery.

Dr. Johnston has a strong background in general orthopaedics in addition to being highly specialized in shoulder and elbow surgery. He trained with world leaders in all aspects of musculoskeletal care at the University of North Carolina. He provides world-class, patient focused care of complex shoulder and elbow conditions including: joint replacement for arthritis and fractures, reverse total shoulder replacement for cuff tear arthropathy, fracture care, tendon tears, and instability. He offers arthroscopic methods for management of arthritis, instability, joint contracture, rotator cuff and labral tears. Further, he manages all elbow conditions, including performing Tommy John surgery.

He continues to pursue his research interests with numerous peer-reviewed publications and book chapters. He has presented research on the national level, most recently on the management of proximal humerus fractures with hemiarthroplasty versus reverse shoulder arthroplasty, treatment of massive rotator cuff tears and the management of shoulder arthritis in younger patients. He is involved in resident, fellow, and surgeon education regionally as well as on the international level. He is involved in cutting edge research on implant design and novel bearing surfaces for shoulder replacement, pain management after shoulder surgery, and understanding failures of previous techniques in rotator cuff repair.

Dr. Johnston approaches his career as an orthopaedic surgeon with the same enthusiasm and passion he does as a father and husband. He feels honored to bring a world-class level of care to the community his wife, Tiffani grew up in and they call home. He is the father to 3, busy children Mattingly Jane, Chandler, and Shay. His interests outside of work include family, golf, fishing, hunting, skiing, and boating.

Dr. Peter S. Johnston, M.D. at the Southern Maryland Orthopaedic & Sports Medicine Center

Dr. William Paterson, M.D.

“During my fellowship, I trained under Dr Sumant Krishnan, who developed the ArthoTunneler arthroscopic transosseous tunneling device. I had the benefit of watching him perform hundreds of rotator cuff repair surgeries during that year. I also finished that year truly understanding the benefits of transosseous rotator cuff repair, including the ability to create any type of repair configuration you could imagine, a more anatomic re-creation of the repair site and significant cost savings compared to anchor-based repair. After coming across an article written about the Tensor TransOs Tunneler in an Orthopedic journal, I knew that I had to give this device a try. Not only is the Tensor TransOs Tunneler even more cost efficient than the ArthroTunneler, it has fewer steps, is more accurate and creates a larger footprint for repair. It is my belief that, in this value driven healthcare environment, using the Tensor TransOs Tunneler for rotator cuff repair will become the gold standard.

Compared to other arthroscopic transosseous rotator cuff repair devices, the Tensor TransOs Tunneler has fewer steps, is more accurate and creates a larger footprint for repair.

Compared to anchor-based rotator cuff repair, the Tensor TransOs Tunneler is just as clinically effective and allows one to place sutures in any type of repair configuration at a significant cost savings.”


Orthopedic Surgery – Shoulder Specialist

Dr. Paterson is a shoulder specialist, practicing in Gilbert, Arizona as part of OrthoArizona.

Dr. Paterson earned his medical degree from the Rosalind Franklin University of Medicine and Science in Chicago where he graduated as a member of the Alpha Omega Alpha Honor Medical Society. He completed his residency at the world-renowned Campbell Clinic. Then, at Baylor University Medical Center, he carried out an additional year of training in disorders of the shoulder under two of the world’s leading experts.

A competitive swimmer in college, Dr. Paterson still enjoys the sport as well as spending time with his wife Pearl and son Lennon.

Medical School: Rosalind Franklin University of Medicine and Science / The Chicago Medical School – Chicago, IL

Orthopaedic Surgery Residency: Campbell Clinic – Memphis, TN

Shoulder Fellowship: Baylor University Medical Center / The Carrell Clinic Shoulder Service – Dallas, TX

Practice: OrthoArizona (Orthoarizona.org)

Dr. William Paterson at Ortho Arizona Complete Musculoskeletal Care

Dr. Guido Fierro, M.D.

“Transosseous rotator cuff repair shows biological and biomechanical advantages in the rotator cuff treatment and is possible to perform it arthroscopically with a simple technique that allows us to create all cuff repair configuration avoiding anchor complications. The Tensor Transos Reusable Bone Tunneler allows you to perform all configurations that you can imagine. In my experience, it always matches the guide and the hook, saving surgical time.”


Guido Fierro is a former fellow at Fundacion Santa Fe de Bogotá and for more than one year learned from some of the best shoulder and elbow surgeons in the world. Currently, he is a shoulder and elbow surgeon at Fundación Santa Fe de Bogotá and clinical professor at Universidad de los Andes in Bogotá – Colombia.