Did You Just Feel a Pop in Your Elbow and Notice Your Biceps Bunching Up? Time Is Critical — Here Is What You Need to Do.
If you tore your distal biceps tendon, the clock started the moment it happened.
The biceps muscle and tendon work like a spring under tension. The moment the tendon tears away from the bone, the biceps muscle recoils — contracting upward toward the shoulder, taking the tendon with it. What you may be noticing right now — a lump in your upper arm, weakness turning your palm up, bruising on the inner aspect of your forearm, and a visible deformity where your biceps used to sit — is that spring in the process of shortening.
You have approximately three to four weeks before that tendon has retracted and scarred down enough that a straightforward repair becomes impossible.
Dr. Raffy Mirzayan has performed more than 350 distal biceps repairs and reconstructions over 25 years — more than any surgeon in Los Angeles. He uses a single-incision technique with dermal allograft augmentation and BMAC biologics that gets patients moving within 10 days of surgery, lifting resistance at 4 weeks, and back to full activity in two and a half to three months. His approach to this injury — the technique, the augmentation, the timing, and the biology — is unlike what most patients will find anywhere else.
If you think you may have torn your biceps tendon, call (310) 746-5918 today. Do not wait.
Understanding the Injury: What Actually Happens When the Distal Biceps Tears
The distal biceps tendon is the attachment point between the biceps muscle and the radius bone at the elbow. This attachment is what gives the biceps its powerful mechanical advantage for supination — the rotating motion used for turning a screwdriver, opening a jar, throwing a ball, or lifting a weight. It also contributes significantly to elbow flexion strength.
Distal biceps ruptures occur predominantly in active men between the ages of 40 and 60, typically from a sudden eccentric load — the arm resists a force while extending, and the tendon, which is often already showing signs of wear, fails completely. The most common mechanisms are heavy lifting, a missed catch, martial arts, and baseball. The injury is almost always complete rather than partial, and the dominant arm is involved in roughly half of cases.
When the tendon tears, it does not simply detach and sit quietly near the bone. It retracts. The biceps muscle, no longer anchored at the elbow, contracts proximally. The tendon shortens. Scar tissue begins to form around it within days. Without surgical repair, patients lose 21% to 55% of supination strength, 79% of supination endurance, and 10% to 40% of elbow flexion strength — deficits that do not improve with time or therapy and are permanent.
This is why distal biceps repair is time-sensitive in a way that most orthopedic injuries are not.
Why Timing Is Everything — and What Happens If You Wait
Dr. Mirzayan is direct with his patients about this: the best outcome from a distal biceps repair comes when your own tendon is repaired back to the bone. That requires getting to surgery before the tendon has retracted too far to reach.
In the first two to three weeks after rupture, the tendon is usually retrievable. It has retracted, but it is mobile enough to be brought back down to the radial tuberosity and secured under reasonable tension. The repair is cleaner, the anatomy is more familiar, and the recovery is more predictable.
Beyond three to four weeks — and sometimes sooner, depending on the individual — the tendon begins to scar down and shorten in ways that make direct repair progressively more difficult and eventually impossible. At that point, the only surgical option is reconstruction using a graft, which is a more complex operation with a longer recovery.
If you have been told to wait and see, or if you have been managing this injury conservatively for several weeks already, call Dr. Mirzayan immediately. He has developed and published a technique for reconstructing the distal biceps tendon in chronic cases where direct repair is no longer possible — using a tibialis anterior allograft (donor tendon) woven through the muscle belly in a Pulver-Taft technique — published in Arthroscopy Techniques (2021). But he will tell you plainly: getting there before the tendon shrinks is always the better path.
The message is simple: if you tore your biceps tendon, do not wait.
Dr. Mirzayan's Approach: Why It Is Different From What Most Patients Will Find
Over 350 distal biceps procedures across 25 years, Dr. Mirzayan has developed and refined an approach to this injury that reflects both his published research and his clinical convictions. There are four elements that distinguish his practice from standard care.
1. Single-Incision Cortical Button Plus Interference Screw Fixation
Dr. Mirzayan performs all primary distal biceps repairs through a single small incision at the front of the elbow using a cortical button that passes through the full diameter of the radius and anchors on the far cortex, combined with an interference screw that compresses the tendon against the bone in its native anatomic position.
This is the strongest fixation construct available for this repair. A landmark study co-authored by Dr. Mirzayan examining 784 distal biceps repairs across 85 surgeons at 13 hospitals — the largest comparative study of distal biceps repair techniques in the literature, published in the American Journal of Sports Medicine (2017) — found that patients treated with cortical button plus interference screw were released from medical care significantly sooner than patients treated with any other single-incision technique. The double-incision technique, still used by many surgeons, was associated with significantly higher rates of posterior interosseous nerve palsy, heterotopic bone formation, and reoperation.
2. Dermal Allograft Augmentation — A Technique Dr. Mirzayan Developed and Published
Here is something most surgeons are not doing — and most patients have never heard of.
In many patients presenting with a distal biceps rupture, particularly those with delayed presentation, older patients, and patients with chronic attritional changes, the tendon itself is not healthy tissue. It is thinned, degenerated, and weakened. Reattaching a compromised tendon to bone with sutures alone is asking the repair to be held by tissue that is already failing.
Dr. Mirzayan came up with a technique to address this directly: wrapping the distal biceps tendon with donated human skin — acellular dermal matrix, or ADM — before it is inserted into the bone tunnel. The ADM is wrapped around the tendon, and sewn into the repair construct using high-strength suture. The combined graft-and-tendon unit is then inserted into a tunnel (socket) and secured with the cortical button and interference screw.
This augmentation accomplishes two things at once. It mechanically reinforces the weakest point in the repair — the junction between the tendon and the bone tunnel — by increasing the stiffness and load-to-failure of the construct. And it provides a biologic scaffold through which the patient's own fibroblasts and tenocytes can migrate, improving the quality of tendon-to-bone healing over time.
Dr. Mirzayan validated the biomechanical rationale for this technique in a collaboration with a world-renowned biomechanics laboratory at the University of Connecticut. The published biomechanical study confirmed that ADM augmentation restores the stiffness, load to failure, and gap formation of an attritional tendon to that of a normal tendon — eliminating the risk of what surgeons call "failure in continuity," where the repair stretches and elongates without rupturing, leaving the patient with persistent weakness and cosmetic asymmetry. The surgical technique was subsequently published in Operative Techniques in Sports Medicine (2018).
Dr. Mirzayan now routinely augments his distal biceps repairs with dermal allograft in the large majority of patients. In his published series of over 60 augmented repairs, there were no re-tears, no synostosis, no infections, no inflammatory reactions, and no reoperations.
Dr. Mirzayan's technique of distal biceps repair augmented with a dermal allograft is featured on the Arthrex website — the world's leading arthroscopic surgery company — whose educational resources are used by orthopedic surgeons in over 100 countries. View the technique here: Distal Biceps Repair Augmented with ArthroFlex Acellular Dermal Extracellular Matrix
3. BMAC Biologics at the Repair Site
In addition to dermal allograft augmentation, Dr. Mirzayan uses bone marrow aspirate concentrate — BMAC — at the repair site for selected patients. BMAC delivers a concentrated payload of mesenchymal bone marrow cells, platelets, and growth factors directly to the tendon-bone interface at the moment of repair, providing the biological environment most conducive to healing.
Dr. Mirzayan applies BMAC both at the repair site and by soaking the dermal allograft in it prior to insertion — saturating the collagen scaffold with the patient's own regenerative cells before it is placed into the tunnel. This dual delivery strategy is designed to maximize the biological healing response during the critical early postoperative period.
4. An Accelerated Recovery Protocol
The combination of strong fixation and biologic augmentation allows Dr. Mirzayan to move patients much faster after surgery than is typical with standard repairs.
The splint comes off at 10 days. Patients begin active range of motion immediately. Resistance training starts at four weeks. Weight training begins at six weeks. Full return to work and sport — including heavy labor and overhead activity — is typically achieved at two and a half to three months.
This timeline is not standard. Most distal biceps repair protocols are more conservative, keeping patients restricted for longer out of concern for re-rupture. The strength of Dr. Mirzayan's repair construct — and the additional mechanical reinforcement provided by the dermal allograft — provides the confidence to move faster without compromising the integrity of the repair.
When Direct Repair Is No Longer Possible: Chronic Distal Biceps Reconstruction
For patients who present late — weeks or months after their injury — or for those who have had a prior failed repair, direct reattachment of the native tendon to the bone is no longer an option. The tendon has retracted too far, scarred into surrounding tissue, and in some cases become what surgeons describe as "cocooned" — encased in dense scar with no elasticity remaining.
For these patients, Dr. Mirzayan performs distal biceps reconstruction using a tibialis anterior tendon allograft. In his published technique — described in Arthroscopy Techniques (2021) — the allograft is woven through the biceps muscle belly in a Pulver-Taft fashion, providing a secure mechanical integration between the graft and the native muscle that achieves superior pullout strength compared to simple end-to-end or onlay methods. The distal end of the graft is then secured to the radial tuberosity using the same cortical button and interference screw construct used in primary repairs.
Reconstruction is a more complex and demanding procedure than primary repair, and the recovery is longer — typically five to six months to full release. But for patients who have been told their window for repair has closed, it offers a meaningful path to recovery of strength and function that would otherwise not be available.
Dr. Mirzayan is one of a small number of surgeons in the country with published techniques for both primary repair and chronic reconstruction of the distal biceps. Whatever stage of this injury you are at, he has an approach.
Optimizing Your Recovery: Perioperative Nutrition
As with all of his surgical patients, Dr. Mirzayan addresses the biology of healing beyond the operating room. Tendon-to-bone healing requires specific amino acids — particularly those involved in collagen synthesis — in quantities that a standard diet frequently cannot supply during the postoperative period.
Dr. Mirzayan recommends Xcellerated Recovery™ for his distal biceps patients — a perioperative amino acid supplementation program formulated specifically for surgical healing, not a general protein supplement. He uses the three-week bundle, beginning one week before surgery and continuing for two weeks after. Disclosure: Dr. Mirzayan believes in this product strongly enough to be an investor in the company; he recommends it because the science supports it and because he uses it with his own patients.
Traveling to Los Angeles for Distal Biceps Repair
Dr. Mirzayan regularly sees patients from Las Vegas, Henderson, Phoenix, Scottsdale, and across the country. Because timing is so critical with this injury, out-of-state patients are encouraged to call immediately rather than waiting to find a local surgeon and schedule a consultation.
A virtual consultation can happen quickly. Before you commit to surgery anywhere, you can meet Dr. Mirzayan on video, share your MRI, and get his direct assessment of your tendon, your repair options, and your timeline. If surgery is indicated urgently — and with this injury, it often is — his team will work to get you scheduled as fast as possible.
Dr. Mirzayan is an out-of-network provider, but most patients with commercial PPO insurance have outstanding out-of-network benefits. His team will verify your coverage before your visit to ensure your costs are minimal or equivalent to your in-network surgeons.
Call (310) 746-5918 now. With this injury, every day matters.
Dr. Mirzayan's Published Research on Distal Biceps Repair
Surgical Treatment of Distal Biceps Tendon Ruptures: An Analysis of Complications in 784 Surgical Repairs Dunphy TR, Hudson J, Batech M, Acevedo DC, Mirzayan R. American Journal of Sports Medicine, 2017. The largest comparative study of distal biceps repair techniques in the published literature, examining 784 repairs by 85 surgeons across 13 hospitals. Patients treated with cortical button plus interference screw were released from medical care significantly sooner than those treated with any other technique. The double-incision technique was associated with statistically higher rates of posterior interosseous nerve palsy, heterotopic bone formation, and reoperation. This study is the definitive evidence base for why Dr. Mirzayan uses the single-incision cortical button plus interference screw technique.
Biomechanical Analysis of Distal Biceps Repair with Dermal Allograft Augmentation Operative Techniques in Sports Medicine / University of Connecticut Biomechanics Laboratory. The biomechanical foundation for Dr. Mirzayan's ADM augmentation technique. This study confirmed that an attritional tendon has significantly lower stiffness, lower load to failure, and greater gap formation than a normal tendon — and that dermal allograft augmentation restores all three parameters to normal tendon values. This is the science behind why Dr. Mirzayan wraps the biceps with dermal allograft.
Distal Biceps Repair with Acellular Dermal Graft Augmentation Mirzayan R, Sethi PM. Operative Techniques in Sports Medicine, 2018. Dr. Mirzayan's published surgical technique for ADM augmentation of distal biceps repair, including the step-by-step method of wrapping, securing, and inserting the augmented tendon construct. Clinical results in over 60 cases: no re-tears, no complications, all patients released to full activity by three months.
Distal Biceps Repair with Acellular Dermal Graft Augmentation — Technique in Shoulder and Elbow Surgery Mirzayan R. Techniques in Shoulder and Elbow Surgery. An additional published description of Dr. Mirzayan's ADM augmentation technique for distal biceps repair, further establishing the reproducibility and indications for this approach.
Chronic Distal Biceps Tendon Tear Reconstruction with Tibialis Anterior Allograft Mirzayan R, Mills ES. Arthroscopy Techniques, 2021. Dr. Mirzayan's published technique for chronic distal biceps reconstruction in patients whose tendon has retracted beyond the point of direct repair. The tibialis anterior allograft is woven through the biceps muscle belly in a Pulver-Taft fashion, providing superior pullout strength compared to end-to-end or onlay methods. This technique gives patients a viable surgical option even when they present weeks or months after injury.
Frequently Asked Questions
How do I know if I tore my distal biceps tendon?
The classic presentation is a sudden pop at the elbow during a forceful activity — lifting or catching a heavy load — followed by immediate weakness and pain. Within hours to days, you may notice your biceps muscle bunching up higher than normal, creating a visible bulge in the upper arm. This is the retracted muscle, no longer anchored at the elbow. If you can reproduce this with a "hook test" — hooking your finger under the tendon at the front of the elbow — and there is no cord to hook, that is a strong clinical indicator of a complete rupture. An MRI will confirm it.
How urgent is surgery?
Very. Dr. Mirzayan recommends surgery within three to four weeks of injury for primary repair. The longer you wait, the more the tendon retracts and scars, and the harder — eventually impossible — direct repair becomes. If you are within that window, call today.
What if I waited too long — can I still be helped?
Yes. Dr. Mirzayan has published a technique specifically for chronic distal biceps reconstruction using a tibialis anterior allograft. This is a more complex procedure with a longer recovery, but it can meaningfully restore strength and function for patients who missed the primary repair window. Call regardless of when your injury occurred.
Why do you wrap the tendon with dermal allograft?
Many patients — particularly those with delayed presentation, older patients, and those with degenerative tendons — do not have healthy tendon tissue to repair. Reattaching a thinned, weakened tendon without reinforcement risks a repair that stretches and weakens over time even if it does not completely re-tear. Dr. Mirzayan developed and published a technique to wrap the tendon in dermal allograft, restoring its mechanical properties to those of a normal tendon before it is inserted into the bone. The biomechanical evidence for this approach was validated at the University of Connecticut.
When does the splint come off?
Ten days after surgery. After that, you begin active range of motion with no brace or restriction. Resistance training starts at four weeks. Weights at six weeks. Full return to activity at approximately two and a half to three months.
What happens if I don't have surgery?
For active patients, an untreated complete distal biceps rupture results in permanent supination strength loss of 21% to 55% and meaningful flexion weakness. These deficits do not improve with time or therapy. The deformity — the bunched biceps muscle — also becomes permanent. For patients with physical jobs or active lifestyles, non-operative management is a significant functional compromise. Patients can oftentimes experience muscle spasms, carmping, and pain if the biceps tear is left untreated.
Does Dr. Mirzayan see out-of-state patients?
Yes. Virtual consultations are available and are the typical starting point. Because of the time-sensitive nature of this injury, out-of-state patients should call immediately rather than waiting. Call (310) 746-5918.
Is Dr. Mirzayan in-network?
Dr. Mirzayan is out-of-network. Most patients with commercial PPO insurance have excellent out-of-network benefits. His office will verify your coverage before your first visit so you understand your financial picture before making any decisions.
Read What Patients Are Saying:
Dr. Raffy Mirzayan, MD is a double-board certified orthopedic sports medicine surgeon at DOCS Health in Los Angeles, California. With more than 350 distal biceps repairs and reconstructions performed over a 25-year career, he is the leading authority on distal biceps repair in Los Angeles and among the most experienced distal biceps surgeons in the United States. He uses a single-incision cortical button and interference screw technique routinely augmented with acellular dermal matrix and BMAC biologics, achieving faster recovery and stronger repairs than standard techniques alone. He has published multiple peer-reviewed papers on distal biceps repair technique, biomechanics, and reconstruction, and is a Clinical Professor of Orthopaedic Surgery at USC. Virtual consultations are available for patients in Las Vegas, Phoenix, Scottsdale, and nationwide — and with this injury, calling sooner rather than later makes all the difference.
DOCS Health | 8436 W 3rd St #800, Los Angeles, CA 90048 | (310) 746-5918 | raffymirzayan.com
