What Is Patient-Specific Instrumentation in Bunion Surgery?
Patient-Specific Instrumentation, often shortened to PSI, uses a three dimensional scan of your own foot to build a surgical plan and guides matched to your anatomy before bunion surgery begins. It is used alongside Lapiplasty 3D Bunion Correction to address the full shape of the deformity rather than only the visible bump.
Foot & Ankle Centers of Frisco, Little Elm, and McKinney offers Patient-Specific Instrumentation with 3D scanning as part of its bunion correction program.
Why a Bunion Is a Three-Dimensional Problem
A bunion is not simply a bump on the side of the foot. The bone behind the big toe has usually rotated and drifted out of position, which is what pushes the toe inward and creates the prominence you can see.
Because the problem involves position and rotation together, a correction that only addresses the surface leaves part of the deformity in place. That is the reasoning behind three dimensional approaches.
How the 3D Scan Changes Surgical Planning
Before the procedure, imaging captures the actual position of the bones in your foot. That scan is then used to prepare a plan and instrumentation built around your measurements.
What this planning step is designed to provide:
- A correction mapped to your bone position rather than a generic template
- Guides prepared in advance to match your anatomy
- Fewer decisions made by estimation during the procedure
- A more consistent, reproducible approach from case to case
Every foot is different, and your surgeon will confirm during your consultation whether this planning approach suits your particular deformity.
How PSI Fits With Lapiplasty 3D Bunion Correction
Patient-Specific Instrumentation is a planning and precision tool, not a separate operation. It supports Lapiplasty 3D Bunion Correction, which is designed to correct the rotational component of the deformity and secure the bone in its corrected position.
The intent of combining the two is a correction that holds well over time. Outcomes still vary by patient, bone quality, activity level, and how closely recovery instructions are followed.
Who Might Be a Candidate
Not every bunion needs surgery, and not every patient is a candidate for this specific approach. A consultation and imaging determine that.
Patients who tend to be evaluated for it include those with:
- Bunion pain that limits daily activity even in roomy shoes
- A big toe that continues drifting further out of alignment
- Little or no benefit from padding, orthotics, or shoe changes
- A bunion that has returned after a previous procedure
What Our Surgeons Want Patients to Understand
"The scan lets us do most of the thinking before we ever step into the operating room," says Dr. Mojgan Tavakoli. "When the plan is already built around that particular foot, the day of surgery becomes about executing it carefully rather than solving it on the spot."
Frequently Asked Questions About PSI Bunion Surgery
Is Patient-Specific Instrumentation a different surgery than Lapiplasty?
No. It is a planning and precision technology used together with Lapiplasty 3D Bunion Correction. The scan and custom guides shape how the correction is planned and carried out. Your surgeon will explain how both fit into your specific plan.
Does the 3D scan hurt?
The scan itself is an imaging step, not a procedure, so it does not involve incisions or anesthesia. Most patients find it straightforward. Your care team will explain what to expect before the appointment.
Will this keep my bunion from ever coming back?
No procedure can promise that. Three dimensional correction is designed to address the rotational cause of the deformity, which is intended to reduce the chance of recurrence compared with approaches that only remove the bump. Individual results still vary.
Talk With a Bunion Surgeon Near You
Our surgeons see bunion patients from Frisco, Little Elm, McKinney, and neighboring The Colony, Texas.
Request a bunion consultation or call 972-712-7773 to find out whether this approach fits your foot.