Shoulder Dislocations & Instability

A board-certified, fellowship-trained orthopaedic shoulder surgeon and sports medicine specialist, Dr. Steven Chudik is renowned for his arthroscopic shoulder expertise and innovative procedures that reduce surgical trauma, speed recovery, and yield excellent outcomes.

Through his research, Dr. Chudik investigates and pioneers advanced and novel arthroscopic procedures, instruments, and implants that have forever changed patients’ lives. Never content to settle for what’s always been done for orthopaedic shoulder care, Dr. Chudik prides himself on providing individualized care and developing a plan that is right for each patient. By taking this approach for the past 20 years, Dr. Chudik has developed minimally invasive surgical techniques, instruments, and implants for the arthroscopic repair of shoulder dislocations and instability. One that has changed countless patients’ lives for the better is an arthroscopic technique Dr. Chudik developed to rebuild a patient’s damaged glenoid (shoulder socket) caused by repeat shoulder dislocations.

Shoulder Instability Expertise

  1.  Anterior Shoulder Joint Dislocations and Instability
  2.  Posterior Shoulder Joint Dislocations and Instability
  3.  Labral Tears (Bankart tears)
  4.  Bony Bankart Injuries
  5.  Multi-directional Shoulder Instability
  6.  Bony Bankart Repair and Glenoid Reconstruction
  7.  Internal Impingement and Microinstability
  8.  Arthroscopic Hill-Sachs Fracture Repair and Remplissage Surgery
  9.  Arthroscopic Capsular Tear Repair and Capsular Plication
  10.  Arthroscopic Humeral Avulsion of the Glenohumeral Ligament (HAGL) Repair
  11.  Superior Labral Tears (SLAP tears) and Repair
  12.  Return to Sport Dynamic Shoulder Stability Training
  13.  Return to Sport  Testing
3-D CT scan shows glenoid bone loss of more than 20 percent from recurrent shoulder dislocations.

Individualized Treatment, Rehabilitation and Return to Sport Protocols and Testing

Because no two people and no two injuries are alike, Dr. Chudik uses his expertise to develop and provide individualized care and recovery plans for his patients. This personal attention explains why patients travel to have Dr. Chudik care for their shoulder conditions and injuries.

Dr. Chudik expects better than average outcomes and provides specific treatment, rehabilitation, and return to activity protocols for golf, throwing and other overhead sports, as well as return to sport testing. He also developed and researched an objective test protocol for determining when it is safe to return to sport following a shoulder dislocation and surgical repair.

Testimonials and Patient Stories

“Dr Chudik is a great surgeon. He did surgery on my shoulder. He is knowledgeable, professional, caring and patient. He spends the time to explain what he is going to do and answers all your question. His PA Meagan is also great.”

“Excellent personalized service. Excellent surgeon. No problems after shoulder surgery. Excellent medical staff as well.”

“So grateful I did 2nd opinion with Dr Chudik. He recommended the least invasive approach with therapy 1st which resolved my frozen shoulder my day to day is so much better”

“It has been 1 year since my shoulder surgery (bicep tendon repair) and I am virtually pain free. The rehab was as expected and continuous exercise and strengthening is equally as important as the initial physical therapy. This was my fourth surgery (different areas not the shoulder) and has been by far the most successful. Dr Chudik did a great job every step of the way and I would not hesitate to see him again if needed.”

“I went through 3 surgeries before a friend referred me to Dr Chudik. He is a great surgeon and also with his therapy protocol I have gotten much better than I did after previous surgeries. I would refer anyone with a shoulder injury to him. He definitely treated like a person and not just an account.”

“Dr Chudik and his team have given me wonderful care. Over the past 2 years I’ve had 3 surgeries and 10 months on disability. I tore both rotator cuffs and Dr Chudik repaired another surgeon’s repair that didn’t heal properly. My experience with Dr Chudik and his staff has been wonderful. They took the time to talk with me, explain my options, and help me decide a plan of action. I would recommend him to anyone!”

“Dr. Steven Chudik performed rotator cuff and bicep repair on both of my arms one year apart. The surgical experiences were positive and a sign of reassurance to me was the respect his staff and the hospital staff have for Dr. Chudik. His protocol for therapy may differ from other doctors because he expects his patients to start therapy three days after surgery. I seem to have done better than other patients I saw at PT. I think the early manipulation following the surgeries made a big difference. Most importantly, I no longer experience debilitating pain. I have resumed most of my activities. Dr. Chudik is an excellent doctor and a good person. Small wonder he is in such high demand.”

Active mom returns to pain-free life following overdue shoulder surgery.

Fate and a torn rotator cuff are changing the lives of countless orthopaedic patients

Daily commute gives active businessman, avid golfer an unexpected ride

Second shoulder work injury jeopardized Kucera’s job, bow hunting pastime

Fractured, displaced humerus is no showstopper for Lewensohn

Uncommon knee condition nearly sidelines All American’s lacrosse future, NCAA national championship

Bailey overcomes injury, orthopaedic surgery to lead Bolingbrook to first state football title

Santi simultaneously rebuilds his shoulder and his house

Repeated shoulder dislocations and surgeries don’t sideline former rugby player Shawn Bastic

A race against time: Frantz’s passion versus prudence

Kmoch “nets” six largemouth bass first day fishing just five months after rotator cuff repair surgery

Susan Swanson’s determination to resume activities after a patella fracture drives need for a new surgical repair procedure

Determination, dedication and arthroscopic surgery return Mary Falck to the slopes and her very active life

Nagel skates through two orthopaedic surgeries, returns to league play but maybe not snowboarding

New ACL arthroscopic procedure by Dr. Steven Chudik lets active kids stay active

“Lower body” hockey injury needed delicate hamstring surgery, lengthy recovery and determination for Edwards to return to activities

Competitive running, bicycling back on energetic executive’s schedule between work, volunteering

Two knee surgeries and a replacement don’t slow down Quirk

Knee replacements, customized care plan have Irwin cheering again from the bleachers and soccer fields

Shoulder Anatomy

The shoulder possesses a remarkable range of motion, making it one of the most mobile and important joints in your body. Whether you are throwing a baseball, working overhead, or performing everyday tasks of reaching and carrying, your shoulder motion and stability are critical to this high level of function. Unfortunately, this increased mobility and structural complexity makes your shoulders susceptible to injuries that can be quite limiting and disabling.

The shoulder consists of three bones, three main joints, and an articulation between the scapula (shoulder blade) and thorax (chest):

  • Scapula (shoulder blade)
  • Clavicle (collar bone)
  • Humerus (upper arm bone)
  • Glenohumeral joint (shoulder joint)
  • Acromioclavicular joint (shoulder blade-collar bone joint)
  •  Sternoclavicular joint (sternum-collar bone joint)
  • Scapulothoracic articulation (shoulder blade-chest connection)

Labrum and Ligament Anatomy

  • The shoulder has a labrum or thickening of firm soft tissue attached to the rim of the glenoid (socket). It deepens the socket to increase stability, bears the load, and serves as the attachment point for ligaments that run between the upper arm bone and the bony glenoid (socket).
  • Ligaments are strong soft-tissue bands that connect bones at a joint and provide stability and proper limits to motion. The labrum and ligaments may be torn if forces cause the humeral head (ball) to abruptly shift from the glenoid (socket) such as during a shoulder dislocation. Shoulder ligaments get their names from the bones to which they connect and include the superior glenohumeral ligament (SGHL), middle glenohumeral ligament (MGHL), and the inferior glenohumeral ligament (IGHL) with important anterior and posterior bands. There also are other important ligaments in the shoulder including the acromioclavicular, coracoclavicular, and sternoclavicular ligaments.


The joint surfaces of the shoulder are covered with a thin, but durable layer of cartilage over the ends of the humeral head (ball) and glenoid (socket) that allows the shoulder surfaces to articulate, and move smoothly—almost frictionless and painlessly along each other. The cartilage lacks a blood supply. It gets nutrition from the joint fluid. Without a blood supply and because of its relatively less active cellular makeup, cartilage does not maintain or repair itself. The cartilage is extremely durable, but in time with “wear and tear” or following injury, it breaks down, fails, and leads to cartilage damage and eventually symptomatic (pain, stiffness, swelling) arthritis (failure of this protective joint surface).



The shoulder has several muscles that help it move with proper coordination and strength to accomplish tasks ranging from simple reaching to high level overhead athletic maneuvers. Muscles are like loaded active springs. They attach to bones across joints by different shaped rope- or band-like tendons to exert their action and cause movement. The rotator cuff is a deep, core group of four muscles. They keep the humeral head (ball) centered on the glenoid (socket) while the pectoralis major, deltoid, and latissimus dorsi (the big muscle movers of the arm) create pulling and pushing forces that would otherwise shift the humeral head out of the glenoid (socket). Even with simply reaching out and away from your body the rotator cuff must generate forces equal to almost 80 percent of your body weight to keep the humeral head centered in the glenoid. Still, greater forces are needed during overhead throwing or strenuous lifting movements. These tremendous forces can cause tears in the tendon portion of the rotator cuff and result in pain and arm/shoulder limitations. The long head of the biceps muscle that attaches to the top of the glenoid through the superior (top) labrum also can be injured and cause pain. Additionally, muscles control the scapula (shoulder blade) or base of the shoulder joint which can be affected by injury and overuse producing shoulder pain and limitations.


Shoulder Instability

Because the shoulder has more motion than any other large joint in the body, it is the most commonly dislocated large joint. There are many structures in the shoulder that have to work together to provide stability and keep the humeral head (ball) seated in the glenoid (socket). Shoulder instability occurs when the humeral head separates from the glenoid. This can be a very quick, partial separation (subluxation), or it can be a more significant condition where the ball and socket completely separate and can get stuck out of place in a dislocated position.

Injuries and Conditions

Surgical Procedures

Meet Dr. Steven Chudik

The Patient Experience


Arthroscopic Shoulder Stabilization, Bankart Repair

Arthroscopic Glenoid Reconstruction (Bony Bankart)

Arthroscopic Glenoid Fracture Reconstruction Patient


Through his research, Dr. Chudik investigates and pioneers advanced and novel arthroscopic procedures, instruments and grafts that change patients’ lives because of better long-term outcomes, or outcomes that previously were never possible. His efforts continue to yield patent applications and patents that will positively affect orthopaedic surgical techniques worldwide.

Novel Procedures

US Patents and Patent Applications

Dr. Steven Chudik continually innovates to create new technology surgical techniques and improve patient care. He also collaborates worldwide with other leaders in the orthopaedic technology industry. Surgeries provide Dr. Chudik with an endless source of ideas to create new, safer, less invasive, and more effective surgical procedures, surgical instruments, and implants. Several of his patents are the direct result of these pioneering endeavors.

  • Method of Minimally Invasive Shoulder Replacement Surgery, U.S. Patent No. 9,445,910, filed September 11, 2006
  • Humeral Implant for Minimally Invasive Shoulder Replacement Surgery. Patent application serial number 11/529,185 case II, filed September 25, 2006
  • Glenoid Implant for Minimally Invasive Shoulder Replacement Surgery, U.S. Patent No. 9,974,658, filed September 25, 2006
  • Humeral Implant for Minimally Invasive Shoulder Replacement Surgery, Serial No.11/525,629, filed September 25, 2006, application published as U.S. Patent App. Pub. 2007/0016305 (A)
  • Guide for Shoulder Surgery, U.S. Patent No. 9,968,459, filed September 29, 2006
  • Suture Pin Device. Patent application serial number 11/529,2006, case XV, filed September 29, 2006
  • Suture Pin Device, Serial No. 11/529,185, filed September 29, 2006, application published as U.S. Patent App. Pub. 2007/0027477 (A)
  • Method of Arthroscopic or Open Rotator Cuff Repair Using An Insertional Guide For Delivering a Suture Pin, U.S. Patent No. 8,540,737, filed October 24, 2006
  • Acromioclavicular Joint Repair System, U.S. Patent No. 9,387,011, filed February 2, 2007
  • Resurfacing Implant for a Humeral Head, Serial No. 13/068,309, filed May 9, 2011, application published as U.S. Patent App. Pub. 2012/0041563 (A)
  • Universal Anterior Cruciate Ligament Repair and Reconstruction System(Cannulated Scalpel), U.S. Patent No. 10,034,674, filed February 2, 2007
  • Resurfacing Implant for a Humeral Head. Patent application serial number 13/068,309 case II (A), filed May 9, 2011
  • Method of Arthroscopic or Open Rotator Cuff Repair Using an Insertional Guide for Delivering a Suture Pin. U.S. Patent Number 8,540,737 B2, issued September 24, 2013
  • Cortical Loop Fixation System for Ligament and Tendon Reconstruction, Serial No. 13/998,567, filed November 12, 2013, application published as U.S. Patent App. Pub. 2015/0134060 (A)
  • Acromioclavicular Joint Repair System. U.S. Patent Number 9,387,011 B2, issued July 12, 2016
  • Method of Minimally Invasive Shoulder Replacement Surgery. U.S. Patent Number 9,445,910 B2, issued September 20, 2016
  • Guide for Shoulder Surgery. U.S. Patent Number 9,968,459 B2, issued May 15, 2018
  • Glenoid Implant for Minimally Invasive Shoulder Replacement Surgery. U.S. Patent Number 9,974,658 B2, issued May 22, 2018
  • Glenoid Implant with Replaceable Articulating Portion, U.S. Patent No. 11,406,505, filed August 20, 2019, issued August 9, 2022
  • Cortical Loop Fixation Method for Ligament and Bone Reconstruction, Serial No. 15/731,719, filed July 24, 2017, application published as U.S. Patent App. Pub. 2019/0021845 (Pending)
  • Humeral Implant and Method, Serial No. 17/532,714, filed November 22, 2021 (Pending), published as U.S. Patent App. Pub. US 2023/0157832
  • Humeral Implant with Cannulation and Method, Serial No. 18/211,396, filed June 19, 2023 (Pending)
  • Glenoid implant with Portal and Method, filed July 2023 (Pending)

Dr. Steven Chudik continually innovates to create new technology, surgical techniques and improve patient care. He also collaborates worldwide with other leaders in the orthopaedic technology industry. Surgeries provide Dr. Chudik with an endless source of ideas to create new, safer, less invasive, and more effective surgical procedures, surgical instruments, and implants. Several of his shoulder patents are the direct result of these pioneering endeavors.


Research on a 3-D model of a glenoid to optimize shoulder replacement surgery.

An inquisitive nature was the impetus for Dr. Steven Chudik’s career as a fellowship-trained and board-certified orthopaedic surgeon, sports medicine physician, and arthroscopic pioneer for shoulder injuries. It also led him to design and patent special arthroscopic surgical procedures and instruments and create the Orthopaedic Surgery and Sports Medicine Teaching and Research Foundation (OTRF). Through OTRF, Dr. Chudik conducts unbiased orthopaedic research, provides up-to-date medical information to help prevent sports injuries and shares his expertise and passion for mentoring medical students in an honors research program, and serves as a consultant and advisor for other orthopaedic physicians and industry research.

Areas of Shoulder Research and Development