Every individual has a unique foot and ankle anatomy, alignment, and movement. Because of these differences, foot and ankle problems can vary greatly from one person to another, and treatment should be tailored to each individual’s needs rather than using a one-size-fits-all approach.

Three-dimensional (3D) presurgical simulation and printing is an advanced technology that helps surgeons plan each patient’s complex foot and ankle reconstruction with greater precision. By planning surgery in advance with this personalized approach, surgeons can perform procedures with greater accuracy and efficiency. These tools can make surgery safer and more predictable, especially for people with complex foot or ankle problems. Ultimately, this approach can help improve recovery, restore function, and allow patients to return to the activities they enjoy.

Surgeons use 3D presurgical simulation and printing to develop a personalized surgical plan before complex foot and ankle reconstruction. Using weight-bearing computed tomography (CT) scans and specialized computer software, surgeons create a 3D model of a patient’s foot or ankle that accurately matches the shape of the patient’s bones and joints. The main goal is to help the surgeon simulate the operation before entering the operating room and develop a surgical plan that is tailored to the patient. Based on this plan, patient-specific 3D-printed models and custom surgical guides can be created to assist during surgery.

Surgeons use 3D printing to make:

• Anatomical models of the foot or ankle to better understand the deformity, plan the procedure, and rehearse complex surgical steps before surgery
• Patient-specific surgical guides that fit precisely on the bone and help surgeons accurately perform bone cuts and position fixation devices (hardware to hold bones in place), such as guidewires and screws, during the operation

This advanced technology is used at several stages of foot and ankle reconstruction to improve planning, precision, and patient outcomes. These stages include:

• Before surgery (preoperative planning): Surgeons use specialized computer software to analyze detailed weight-bearing CT scans of the foot or ankle. This allows them to visualize the deformity in three dimensions and plan the best way to fix it. Multiple procedures can be simulated, and their effects on foot alignment and biomechanics (how the foot or ankle moves and handles weight and force) can be analyzed to predict the expected outcome of each approach. Based on these simulations, the surgeon selects the most biomechanically sound (best suited to support proper movement, alignment, and weight-bearing) and efficient surgical procedure to achieve the best outcome. Sometimes, a life-size physical model is printed to help the surgeon and the patient better understand the condition and the planned surgery.
• Printing custom surgical guides: Based on the selected plan, engineers and surgeons work together to design patient-specific surgical guides that precisely match the patient’s bone. These guides are manufactured using a 3D printer and then sterilized for use in the operating room.
• During surgery: The surgeon places the custom surgical guide on the bone. The guide helps the surgeon perform precise bone cuts and position guidewires, screws, or other fixation devices exactly as planned. It can reduce the need for repeated X-rays during the procedure. This technology is especially valuable in minimally invasive surgery, where the surgeon has a limited view and precise correction can be more challenging.
• After surgery: The surgical guides are temporary instruments used only during the operation. They are removed before the end of the operation and are not left inside the body. After surgery, patients follow an individualized recovery program, which may include wearing a cast or boot, physical therapy, and follow-up visits.

Many foot and ankle problems can benefit from 3D surgical simulation and printing, especially when the surgery is complex or requires precise correction. Common situations include:

• Foot deformities: These include conditions such as high-arched feet (pes cavus), flatfoot, or other deformities, where the bones are not properly aligned. 3D planning helps surgeons determine the optimal correction and evaluate different surgical options before surgery.
• Ankle arthritis: For total ankle replacement, accurate positioning of implants is critical. In selected patients, ankle arthritis can be treated with a supramalleolar osteotomy, a procedure that realigns the lower leg bone (tibia) to shift body weight away from the damaged portion of the ankle joint. Because this operation requires highly accurate bone cuts and correction of bone angle and alignment, 3D planning and patient-specific surgical guides can improve precision.
• Minimally invasive surgery: Externally placed, customized surgical guides can assist surgeons in performing accurate bone cuts and deformity correction through small incisions, which limit the surgeon’s view of the bone.
• Malunions: These are bones that healed in the wrong position after a break or injury. 3D simulation helps surgeons understand the deformity and plan the precise correction needed to restore normal alignment.
• Revision surgery: When a previous operation did not work as planned, a new surgery, known as revision surgery, is needed. This is especially valuable when revising a failed fusion (nonunion—when bones do not grow back together during healing—or malunion), where it is critical to prepare and realign the bones accurately.
• Joint fusion or realignment: Procedures to join bones together (arthrodesis) or correct the position of joints (corrective osteotomies, in which bones are cut and realigned), such as in severe arthritis or deformities.
• Congenital or neuromuscular conditions: Complex deformities that are present from birth or caused by neurological or muscular disorders often require individualized surgical planning because each patient has a unique anatomy and deformity pattern.

For example, a person with a high-arched foot that causes pain and walking problems may need one or more bone cuts (osteotomies) to restore a more normal foot shape. 3D simulation allows the surgeon to evaluate several corrective strategies, determine the ideal amount of correction, and create customized surgical guides to accurately execute the plan during surgery. Similarly, during ankle or hindfoot (the heel area) fusion surgery, patient-specific guides can help the surgeon position guidewires and screws precisely as planned, improving alignment and fixation.

Although 3D surgical simulation and printing offer significant advantages for many complex foot and ankle procedures, they are not necessary for every operation. The surgeon decides whether this technology is appropriate based on each patient’s specific condition, anatomy, and treatment goals.

The process of using 3D surgical planning and printing for foot and ankle reconstruction typically follows these steps:

1. Clinic visit: The patient meets with the surgeon to discuss symptoms, evaluate the foot and ankle condition, and review treatment goals. If surgery is recommended, the surgeon determines whether 3D surgical planning and patient-specific guides would be beneficial.
2. Imaging: The foot and ankle are imaged in detail, most commonly with a weight-bearing CT scan. In some cases, magnetic resonance imaging (MRI) or other imaging tests may also be used. These images provide the surgeon with a clear picture of the bones, joints, and surrounding structures.
3. 3D surgical planning and simulation: Specialized computer software is used to create a 3D digital model of the patient’s foot or ankle. The surgeon analyzes the deformity, simulates one or more surgical procedures, and determines the optimal correction based on the simulated plans. If appropriate, patient-specific surgical guides are designed as part of the surgical plan.
4. 3D printing: Once a surgical plan is finalized, the patient-specific models and surgical guides are manufactured using a 3D printer, typically with medical-grade materials.
5. Quality check: The surgical team inspects the printed models and guides for accuracy and fit.
6. Sterilization: The surgical team cleans and sterilizes the guide to ensure it is safe for use during surgery.
7. Surgery day: The surgeon uses the guide during the operation to carry out the planned procedure.

Depending on the complexity of the patient’s condition and the design requirements, the process may take several days to a few weeks from the initial scan to the finished guide.

Patient-specific 3D-printed surgical guides help the surgeon by fitting closely to the patient’s bone and showing exactly where to make cuts or place guidewires and screws. These guides help translate the personalized surgical plan developed on the computer into precise execution in the operating room.

The main advantages include:

• Improved accuracy in achieving the planned bone alignment and deformity correction.
• Greater precision and consistency by reducing guesswork and minimizing the need for repeated adjustments during surgery.
• Reduced radiation exposure by decreasing the number of X-rays needed to confirm guidewire, screw, or bone position.
• Improved surgical efficiency, which may reduce operative time, particularly in complex reconstructive procedures.
• Enhanced support for minimally invasive surgery, where direct visualization of the bones is limited.

Although results vary depending on the patient’s condition and the complexity of the procedure, clinical studies have shown that patient-specific 3D surgical guides can improve the accuracy of deformity correction and implant placement (positioning devices such as screws or joint-replacement components in the body) and may shorten the length of the operation in some foot and ankle procedures.

3D printing may not be necessary or appropriate for every patient. Situations in which this technology may not be used include:

• Straightforward cases: Many routine or straightforward surgeries can be performed accurately without the need for advanced 3D planning or patient-specific surgical guides.
• Inadequate imaging: If adequate imaging is unavailable, this technology may not be feasible.
• Emergency or urgent surgery: Designing, manufacturing, and sterilizing patient-specific surgical guides takes time. In urgent situations, there may not be enough time to complete this process before the operation.
• Anatomy or soft-tissue issues: If the bone shape or surrounding tissues do not allow the guide to fit well, it may not be used.
• Clinical judgment: Every patient and every condition is unique. The surgeon decides if 3D printing is the right choice for each patient.

The risks associated with 3D surgical planning and patient-specific guides are generally the same as those associated with standard foot and ankle surgery. The improved precision provided by the use of custom guides may reduce certain surgical risks. Possible risks include:

• Infection: As with any surgical procedure, there is a small risk of infection at the surgical site.
• Nerve or blood vessel injury: Although uncommon, nearby nerves or blood vessels can be injured during surgery. Careful preoperative planning and patient-specific surgical guides are designed to help minimize this risk.
• Delayed wound or bone healing: The surgical incision may heal more slowly than expected, or the bone may take longer than expected to heal. These risks are related to the surgical procedure and the patient’s overall health and are not increased by the use of patient-specific surgical guides.
• Guide-related issues: Rarely, a guide may not fit as intended because of issues with the imaging, design, or manufacturing process, or it may become damaged during use. In such cases, the surgeon can safely proceed using conventional surgical techniques while following the presurgical plan.
• Temporary numbness or discomfort: Some people may experience numbness, tenderness, or discomfort near the surgical incision. These symptoms usually improve over time and are not more common with the use of patient-specific surgical guides than with conventional surgery.

The outlook after foot and ankle reconstruction with 3D surgical planning and patient-specific surgical guides is generally very good. Most people experience pain relief, improved foot and ankle alignment, better movement, and improved ability to walk and do daily activities. Clinical studies have shown that using 3D patient-specific guides can help achieve more accurate correction, reduce surgery time, and decrease radiation exposure by reducing the need for repeated X-rays during surgery.

Recovery time varies depending on the type of surgery, the severity of the condition, and the patient’s overall health. Following the rehabilitation plan and attending follow-up visits are important for the best results.

While 3D surgical planning and patient-specific guides do not eliminate the inherent risks of surgery, they can improve surgical precision and consistency. For many patients undergoing complex foot and ankle reconstruction, these techniques help surgeons achieve the optimal correction with greater precision, allowing patients to return to their usual activities with greater comfort and confidence.

This article was medically reviewed in July 2026.