Whitby Family Footcare Clinic

107-420 Green St. • Whitby, Ontario • L1N 8R1 905.668.8233

How a Custom Orthotic Prescription Is Made

How Custom Foot Orthotics Are Prescribed at Whitby Family Footcare

What Goes Into a Custom Foot Orthotic Prescription

A truly custom-made foot orthotic is built from multiple clinical assessments, measurements, and casting techniques. Each step ensures the device addresses your specific symptoms, biomechanics, and footwear needs.

Step 1: Understanding Your Foot or Leg Complaint

Your visit begins with a detailed history of your symptoms—how they started, what aggravates them, and how they affect daily activities. This information guides the biomechanical exam and influences the final prescription.

Step 2: Biomechanical Examination

Your feet and lower limbs are assessed while standing or lying down. This includes evaluating:

  • Joint motion

  • Bone alignment

  • Muscle strength and flexibility

  • Areas of overuse or tissue stress

These findings help identify structural or functional issues contributing to pain or instability.

Hubscher maneuver to check windlass mechanism of the foot

Step 3: Gait Analysis

You will be observed walking—and if you’re a runner, possibly running on a treadmill. Gait analysis helps identify:

  • Leg length differences

  • Foot flattening or asymmetry

  • Abnormal loading patterns

  • The need for pressure mapping or video analysis

These insights refine the orthotic prescription.

Pes planus foot during gait

Step 4: 3D Foot Casting Methods

Capturing the exact 3D shape of your foot is essential for a true custom device. Casting method depends on joint mobility and foot structure:

Semi‑Weight‑Bearing Casting

Used when joint motion is limited (e.g., arthritis). The foot is casted while seated with the foot contacting the floor. Foam box impressions may also be used.

Neutral Position Casting

Used when joints move normally. The foot is casted non‑weight‑bearing while held in a stable, neutral position—especially at the talo‑navicular joint.

3D Laser Scanning

A clean, efficient alternative to plaster. Scanners capture the full plantar contour and transmit data electronically to the orthotic lab.

Plaster foot cast in STJ neutral
3D laser scan of foot cast
Side by side corrected cast and flat foot comparison

Step 5: Writing the Orthotic Prescription

The prescription integrates findings from:

  • History

  • Biomechanical exam

  • Gait analysis

  • 3D casting

Key prescription elements include:

  • Shell flexibility based on weight, activity, and occupation

  • Device width for stability

  • Heel cup depth for control

  • Additions for neuromas, corns, or pressure relief

  • Footwear compatibility, since some devices require more shoe volume

This step ensures the orthotic is tailored to your biomechanics and lifestyle.

Step 6: Orthotic Fabrication

Your cast and prescription are sent to a specialized orthotic laboratory. Fabrication typically takes up to two weeks.

MDF positive of foot
CFO on top of milled cast

Step 7: Orthotic Fitting, Break‑In, and Follow‑Up

At your dispensing appointment, your orthotics are fitted using a clinical checklist. Patients usually adapt over four weeks, though some adjust immediately. Temporary aches in the feet, legs, hips, or back can occur as your body adapts. Modifications may be made after the break‑in period to improve comfort.

Patient standing on foot orthotic during a dispensing appointment

Book an Appointment

If you’re experiencing foot, ankle, or lower‑leg pain, a custom foot orthotic may help.

Book an appointment for custom foot orthotic assessment.at Whitby Family Footcare Clinic, located at:

107‑420 Green St., Whitby, Ontario Entrance on Ontario Street Tel: 905‑668‑8233