A Total Knee Replacement Guide: What to Expect Step by Step
Quick Answer: A total knee replacement is a surgery that removes damaged cartilage and bone from the end of the thigh bone and top of the shin bone and replaces those surfaces with an artificial implant, usually after conservative treatments like medication, injections, and physical therapy have stopped working. Most patients spend one to two days in the hospital and are walking with support the same day or the day after surgery.
If knee pain has started to control your daily life, walking around your neighborhood in Claremont, gardening, or simply getting up from a chair without help, you may be researching whether surgery is the right next step. This total knee replacement guide walks you through the entire process, from your first evaluation appointment through the day of surgery and the first days back home, so you know exactly what to expect at each stage.
Total knee replacement, also called total knee arthroplasty, is one of the most common and successful orthopedic procedures performed today. According to the American Academy of Orthopaedic Surgeons (AAOS), hundreds of thousands of these procedures are performed in the United States each year, most often to treat advanced osteoarthritis, a condition where the smooth cartilage cushioning the knee joint wears away and bone begins to rub against bone. Understanding each step of the process, from evaluation to recovery, can ease anxiety and help you make an informed decision with your orthopedic surgeon.
What Happens During the Initial Evaluation for Knee Replacement?
The initial evaluation for a total knee replacement involves a physical exam, a review of your symptoms and medical history, and imaging to assess the extent of joint damage. Your orthopedic surgeon will ask how long you have had knee pain, what makes it better or worse, and how it affects your ability to walk, climb stairs, or sleep. They will check your knee's range of motion, stability, and alignment, and look for signs of swelling or deformity.
Imaging is a key part of this visit. X-rays show how much cartilage has worn away and whether the joint space has narrowed, which is a hallmark of osteoarthritis. In some cases, your surgeon may order an MRI to get a more detailed look at soft tissue, cartilage, and ligaments, especially if the diagnosis is not clear from X-rays alone. This evaluation gives your surgeon the information needed to determine whether knee replacement surgery is likely to help, or whether other treatments should be tried first.
Why Conservative Treatment Usually Comes Before Surgery
Most patients try several months of conservative, non-surgical treatment before surgery is considered. This typically includes anti-inflammatory medication, corticosteroid or lubricating injections into the joint, physical therapy to strengthen the muscles supporting the knee, weight management, and activity modification. These approaches can meaningfully reduce pain and improve function for many people, particularly in the earlier stages of arthritis.
Physical therapy deserves special mention because it often has the biggest impact of any conservative option. A structured program that builds strength in the quadriceps and hamstring muscles can take pressure off a worn joint and improve stability. Your care team will typically track your progress over several visits before deciding whether conservative treatment is working well enough to continue, or whether it is time to discuss surgical options.
How Is the Decision to Move to Surgery Made?
The decision to move forward with a total knee replacement is made jointly by you and your surgeon once conservative treatment no longer provides adequate relief. Surgery is generally considered when pain persists despite medication and therapy, when the knee significantly limits daily activities like walking, dressing, or sleeping, and when imaging confirms substantial cartilage loss or bone-on-bone contact.
This is not a decision made in a single visit. Your surgeon will discuss your overall health, activity goals, and any medical conditions that could affect surgery or recovery, since patients undergoing knee replacement surgery need to be healthy enough to tolerate anesthesia and participate in early rehabilitation. Once you and your surgeon agree that surgery is appropriate, the practice moves into pre-operative planning.
Pre-Operative Planning and the Day of Surgery
Any thorough total knee replacement guide should note that pre-operative planning includes medical clearance, imaging-based surgical planning, and detailed instructions to prepare your body and your home for recovery. You will typically have blood work and, depending on your health history, clearance from your primary care physician or cardiologist. Your surgeon will also review your X-rays or, for some cases, a CT scan to plan implant sizing and positioning ahead of time.
Anesthesia Options
Most patients undergo total knee replacement surgery under spinal or regional anesthesia, which numbs the lower body while you remain sedated, though general anesthesia is also an option depending on your health and preference. Your anesthesia team will discuss the choice with you beforehand and select the approach that is safest and most comfortable for your specific situation.
What to Expect the Day Of
On the day of surgery, you will arrive several hours beforehand for final preparation, including an IV line, a review of your surgical site, and a final conversation with your surgical team. Many practices ask patients to stop eating and drinking after midnight the night before, and to arrange for a ride home or to the rehabilitation facility in advance, since you will not be able to drive.
What Happens During the Total Knee Replacement Procedure
This total knee replacement guide reaches its most important step here: during the procedure, the surgeon removes damaged cartilage and a thin layer of bone from the end of the femur (thigh bone) and the top of the tibia (shin bone), then resurfaces the joint with an implant that recreates a smooth, functioning knee. The kneecap, or patella, may also be resurfaced depending on its condition. The procedure typically takes one to two hours.
Removing Damaged Bone and Cartilage
The surgeon makes precise cuts to the ends of the femur and tibia to remove the worn, damaged surfaces causing pain. This step is guided by careful pre-operative measurements to ensure the remaining bone is properly shaped and aligned to receive the new implant.
Placing the Knee Implant
Once the bone is prepared, metal components are attached to the end of the femur and the top of the tibia, with a durable plastic spacer placed between them to allow smooth, low-friction movement, similar to how healthy cartilage once functioned. There are several knee implant types available, differing in material, shape, and how they accommodate the ligaments behind the knee, and your surgeon will select the option best suited to your anatomy and activity level.
Robotic-Assisted and Computer-Navigated Techniques
Robotic knee replacement and computer-navigated techniques are increasingly used to help surgeons achieve more precise implant alignment and joint balance during surgery. These tools act as an aid to the surgeon's skill and judgment rather than a replacement for it, using imaging and real-time data to guide bone cuts and implant positioning. The AAOS notes that these technologies are a growing part of modern orthopedic practice, though the surgeon's experience and technique remain central to a successful outcome regardless of which tools are used.
Recovery: From the Hospital to Home
Following a total knee replacement guide through recovery starts on day one, since recovery typically begins the same day as surgery, with most patients standing or taking a few steps with a walker within hours of the procedure. This early movement, sometimes called early mobilization, helps reduce the risk of blood clots and jump-starts the rehabilitation process.
Hospital Stay and Immediate Post-Op Care
Most patients spend one to two nights in the hospital after knee replacement surgery, though some healthy, well-prepared patients go home the same day. During this time, your care team manages pain with a combination of medications, monitors for complications, and works with a physical therapist to begin gentle range-of-motion exercises and short walks. Ice, elevation, and prescribed blood-thinning medication are also typically part of this early recovery period to reduce swelling and clot risk.
The Transition Home
Before discharge, your care team will confirm that you can safely get in and out of bed, walk a short distance with an assistive device, and manage stairs if needed at home. Many patients throughout the Inland Empire and Pomona Valley continue outpatient physical therapy for several weeks after returning home, gradually rebuilding strength and range of motion. Full recovery from a total knee replacement generally takes several months, though most patients see significant improvement in pain and function well before then, according to data reviewed by the AAOS.
Making an Informed Decision About Knee Replacement
Choosing to move forward with a total knee replacement is a significant decision, but understanding each step, from evaluation and conservative treatment through surgery and recovery, can make the process feel far less uncertain. This total knee replacement guide is meant to give you a clear picture of what lies ahead, but every patient's situation is different, and the right path forward depends on your specific knee, your health, and your goals. An honest conversation with an experienced orthopedic surgeon in Southern California is the best next step toward finding lasting relief.
If you're experiencing knee pain that's limiting your daily life, the team at Garey Orthopedic Medical Group is here to help. We offer same-day and next-day appointments for new patients. Visit gareyortho.com or call us to schedule today.