Orthopedic surgery is the medical specialty focused on injuries and diseases of the musculoskeletal system: your bones, joints, ligaments, tendons, muscles, and nerves. Despite the name, the field covers far more than surgery. Orthopedic surgeons diagnose conditions, prescribe medications and injections, fit casts and braces, recommend physical therapy, and perform operations when other options fall short. Seeing an orthopedic surgeon does not mean you’ll end up in an operating room.
What Orthopedic Surgeons Actually Treat
The musculoskeletal system is what allows you to move, work, and stay active, so orthopedic conditions range widely. Broken bones, torn ligaments, arthritis, herniated discs, carpal tunnel syndrome, bone tumors, clubfoot in children, sports injuries, and degenerative joint disease all fall under this umbrella. Treatment can be as simple as a brace and physical therapy or as complex as rebuilding a shattered pelvis.
Because their training covers the full spectrum from conservative care to surgery, orthopedic surgeons are positioned to judge whether an operation is genuinely your best option or whether you’d recover just as well without one. That decision-making role is a central part of the specialty.
Subspecialties Within Orthopedics
Most orthopedic surgeons eventually focus on a particular area through a one-year fellowship after residency. The main subspecialties include:
- Sports medicine: Rapid diagnosis and treatment of athletic injuries, with heavy use of arthroscopic techniques for joint repair.
- Joint replacement (arthroplasty): Replacing damaged hips, knees, and shoulders with prosthetic implants.
- Trauma: Acute fracture management and stabilization across all body regions and age groups, often in emergency settings.
- Pediatric orthopedics: The most diverse subspecialty in terms of procedures, covering every anatomic area but limited to children. Conditions range from scoliosis to growth plate injuries to congenital limb differences.
- Spine surgery: Herniated discs, spinal stenosis, deformities, and spinal fractures.
- Orthopedic oncology: Benign and malignant tumors of bone and soft tissue in the limbs, limb girdles, and sometimes the spine.
- Hand and upper extremity: Conditions affecting the fingers, wrist, elbow, and shoulder, from nerve compression to complex fractures.
The Most Common Procedures
The three most frequently performed orthopedic operations worldwide are total knee replacement, total hip replacement, and ACL reconstruction. Knee replacement alone accounts for roughly 700,000 procedures per year in the United States, and that number is projected to exceed 3.4 million annually by 2030 as the population ages. ACL reconstruction, the most common ligament repair in the knee, is performed about 400,000 times per year globally.
Other high-volume procedures include rotator cuff repair, spinal fusion, arthroscopic meniscus surgery, and fracture fixation with plates, screws, or rods.
Arthroscopic vs. Open Surgery
Many orthopedic operations can be done one of two ways. Arthroscopic surgery uses small incisions and a camera to work inside a joint. Open surgery involves a larger incision and direct visualization of the structures being repaired. Arthroscopy is generally associated with less postoperative pain and a potentially quicker early recovery, but it demands considerable technical skill and isn’t suitable for every situation.
Open repair remains the better choice for massive or complex injuries where the surgeon needs full visibility and access. In rotator cuff repair, for instance, studies comparing the two approaches have found similar long-term recovery times and functional outcomes. The choice between them depends on the size and complexity of the tear, your anatomy, and your surgeon’s expertise.
Robotic-Assisted Surgery
Since the 1980s, robotic systems have been developed to improve precision in orthopedic procedures, particularly hip and knee replacements. These systems help the surgeon position implants with greater accuracy, consistently reducing alignment errors compared to freehand technique. Meta-analyses and randomized trials confirm improved radiological outcomes, meaning the implant ends up closer to the ideal position on imaging.
Whether that precision translates to better long-term function or fewer revision surgeries is still being studied. Robotic assistance is a tool that enhances the surgeon’s work rather than replacing it.
How Long Joint Replacements Last
Modern joint replacements are remarkably durable. A large-scale analysis published in The Lancet, pooling data from 14 national registries, found that approximately 82% of total knee replacements last at least 25 years. Partial knee replacements (which resurface only one compartment of the knee) are less durable, with about 70% surviving 25 years. The UK’s National Institute for Health and Care Excellence recommends that hip replacement components should have a revision rate of 5% or less at 10 years, a benchmark most modern implants meet.
Your individual outcome depends on factors like age, weight, activity level, and the quality of the bone the implant is anchored to. Younger, more active patients tend to wear through implants faster, which is one reason surgeons sometimes recommend delaying replacement when possible.
How Diagnosis Works
Orthopedic evaluation typically starts with a physical exam and imaging. X-rays are usually the first step and are highly effective for identifying fractures and bone abnormalities. MRI is the go-to for soft tissue problems like ligament tears, cartilage damage, or disc herniations, because it produces detailed images that distinguish healthy tissue from damaged tissue. CT scans create cross-sectional “slices” of the body and are used for complex fractures, tumors, infections, and surgical planning where three-dimensional detail matters.
In some cases, diagnostic arthroscopy (inserting a camera into a joint) is used when imaging alone can’t provide a definitive answer.
What Recovery Looks Like
Rehabilitation after orthopedic surgery generally follows four phases, though the timeline varies by procedure. The first phase covers the initial few weeks after surgery and focuses purely on healing: managing pain, protecting the surgical site, and preventing complications like blood clots. During weeks two through six, the focus shifts to restoring mobility, with gentle range-of-motion exercises and guided movement.
From roughly six to twelve weeks, strengthening begins. You’ll work on rebuilding the muscles around the surgical area, gradually increasing resistance and load. The final phase, lasting from about three to six months post-surgery (sometimes longer), targets functional recovery: returning to normal activities, sport-specific training if applicable, and personalized guidance on what movements are safe and which still need modification.
A total knee replacement patient, for example, might walk with a walker within a day of surgery, transition to a cane within weeks, and return to activities like golf or cycling within a few months. A complex fracture repair or ligament reconstruction could take six to nine months before full activity is realistic.
Training Required to Become an Orthopedic Surgeon
Orthopedic surgery requires one of the longest training paths in medicine. After four years of medical school, surgeons complete a five-year orthopedic residency that includes clinical rotations, research, and didactic training. Those pursuing a subspecialty add a one-year fellowship. In total, the path from starting medical school to independent practice spans at least 13 years, including a four-year undergraduate degree. Orthopedic residency is among the most competitive in medicine, consistently attracting top-ranked medical students.
Biologics in Orthopedic Care
Platelet-rich plasma (PRP), a concentration of growth factors derived from your own blood, is increasingly used alongside traditional orthopedic treatments. It has been applied to tendon injuries (tennis elbow, Achilles tears, patellar tendinitis), knee and shoulder arthritis, plantar fasciitis, ACL reconstruction, and nonhealing fractures. The idea is to accelerate the body’s natural repair processes.
Results are promising for some conditions but inconsistent for others, and there is no international consensus on the best preparation method or dosing protocol. PRP is not banned in sports: the World Anti-Doping Agency initially listed it as a prohibited substance in 2010 but reversed that decision in 2011, clarifying that despite containing growth factors, PRP use for sports injuries is permitted.