Conditions & Treatments

Advanced shoulder and elbow care.

Dr. Knudsen treats the full range of shoulder and elbow conditions, with particular expertise in shoulder replacement, revision surgery, complex rotator cuff tears, instability, fractures, and sports-related elbow injuries. Every plan begins with a precise diagnosis, a clear explanation of the options, and a treatment strategy built around the patient's goals.

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Technology & Planning

Patient-specific planning for every shoulder replacement.

Every shoulder replacement performed by Dr. Knudsen begins with a preoperative CT scan and three-dimensional computer templating. This allows him to study each patient's bone shape, wear pattern, deformity, and remaining bone stock; compare implant designs and sizes; and plan component position, alignment, and fixation before surgery.

He also uses augmented- and mixed-reality technology to help translate the individualized plan into the operating room. These technologies support surgical precision and customization, but they do not replace clinical judgment, experience, or careful execution.

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Surgical instruments used in orthopedic procedures

Patient Experience

My shoulder was in very bad shape. The joint required reconstruction, and my rotator cuff was totally useless. After surgery and several months of physical therapy, I am back to normal daily function and have no pain. I am so grateful that I found the right surgeon.

Patient following complex reverse shoulder replacement | Google review

These testimonials describe individual patient experiences. Treatment recommendations, recovery, and outcomes vary by patient.

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Patient-First Navigation

Not sure where to start?

Answer a few questions about where it hurts, how it began, and whether you have had prior surgery. We will show the educational pages that may be most relevant and the right appointment pathway. This tool is not a diagnosis.

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Explore All Conditions & Treatments

The complete clinical library.

All 29 conditions and procedures Dr. Knudsen treats, grouped by clinical category — from replacement and revision surgery to trauma, tendon injuries, and complex care.

Shoulder Replacement, Arthritis & Revision

Anatomic, reverse, and revision reconstruction for arthritis, cuff failure, and prior implant problems.

Rotator Cuff & Biceps

Repair, reconstruction, and revision for the tendons that lift, rotate, and stabilize the shoulder.

Shoulder Instability, Labrum & Stiffness

First-time and recurrent dislocation, labral injury, and progressive stiffness.

Shoulder Trauma

Fractures and ligament injuries around the shoulder girdle following a fall or collision.

Elbow Tendon & Sports Injuries

Acute tendon rupture and overuse tendon conditions in throwing athletes and active adults.

Elbow Trauma, Reconstruction & Nerve

Complex fractures, chronic instability, arthritis, and nerve compression at the elbow.

Complex Care

Independent review for the most difficult shoulder and elbow decisions.

Complex Shoulder & Elbow Second Opinions

A second opinion should do more than repeat the first diagnosis.

Dr. Knudsen provides detailed review of imaging, prior operations, treatment options, and realistic outcomes for patients facing shoulder replacement, revision surgery, recurrent instability, failed rotator cuff repair, complex fractures, or another difficult decision.

Patient Experience

I sustained very bad injuries in a bike accident, and Dr. Knudsen was so nuanced in his care. When others were saying I should get surgery, Dr. Knudsen was more wary of that approach. A year later, there is no question that Dr. Knudsen's approach was the right one.

Trauma second-opinion patient | Google review

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For Referring Clinicians

Complex surgical referrals and time-sensitive injuries

Dr. Knudsen welcomes referrals for shoulder replacement, failed prior surgery, revision reconstruction, complex rotator cuff tears, instability with bone loss, fractures, distal biceps or triceps ruptures, UCL injuries, and difficult elbow reconstruction.

Patient Experience

He was quick to respond to concerns and explained everything before and after surgery in detail and in a way that was easy to understand. His surgical team and staff were awesome as well.

Surgical patient referred by another orthopedic surgeon | Google review

Operative reports, prior imaging, implant information, and a concise treatment timeline are helpful when available.

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Frequently Asked Questions

Frequently Asked Questions

How do I know whether I need shoulder or elbow surgery?

Surgery is considered when the diagnosis is clear, reasonable nonsurgical treatment has been tried (or isn't appropriate for an acute injury), and the expected benefit outweighs the risks and recovery for your goals. Dr. Knudsen reviews your history, examination, and imaging together before recommending a surgical or nonsurgical path.

Should I bring my MRI, CT scan, or prior operative report?

Yes. Bring the actual imaging studies, not only the written report, along with any prior operative reports, implant information, and a brief timeline of your symptoms and treatment. This is especially helpful for revision surgery and complex second opinions.

What is the difference between anatomic and reverse shoulder replacement?

Anatomic replacement preserves the shoulder's natural ball-and-socket orientation and is generally used when the rotator cuff still functions well. Reverse replacement changes the joint's mechanics so the deltoid can power more of the lifting motion, and is often used for irreparable cuff tears, severe bone loss, or a failed prior replacement.

More on shoulder replacement options

Can Dr. Knudsen evaluate pain after a previous shoulder or elbow operation?

Yes. Evaluating a painful or failed prior surgery is a core part of the practice, including failed rotator cuff repair, failed stabilization, painful shoulder replacement, and elbow fracture fixation that has not healed as expected.

More on complex second opinions

Which injuries should be evaluated promptly?

Recent fractures, dislocations, distal biceps or triceps ruptures, and sudden new weakness after an injury should be evaluated promptly, since earlier treatment can affect repair options and outcomes.

How do I request a complex second opinion?

Contact the office and let the team know you are requesting a second opinion. Arranging transfer of your actual imaging, along with any operative reports and implant information, helps make the consultation as productive as possible.

Learn more about complex second opinions