---
title: How to use the Parametric Foot and Create Mold Tools (SMO)
description: The Parametric Foot and Generate Mold tools allow you to design a patient-specific mold based on anatomical measurements rather than a scan. These tools are specifically intended for the creation of Supramalleolar Orthoses (SMO's).
---

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# How to use the Parametric Foot and Create Mold Tools (SMO)

## The Parametric Foot and Generate Mold tools allow you to design a patient-specific mold based on anatomical measurements rather than a scan. These tools are specifically intended for the creation of Supramalleolar Orthoses (SMOs).

The **Parametric Foot** and **Generate Mold** tools allow you to design a patient-specific mold based on anatomical measurements rather than a scan. These tools are specifically intended for the creation of **Supramalleolar Orthoses (SMOs)**.

Using a predefined algorithm, the Parametric Foot tool recreates the patient’s foot geometry based on mandatory and optional measurements. The Generate Mold tool then lets you fine-tune the mold using adjustable offsets and toebox parameters.

You can access the Digital Limb Creator through logging in on your account on [serp.spentys.com](http://serp.spentys.com), or on [foot.spentys.com](http://foot.spentys.com) 

### **1. Before You Start**

#### Patient Eligibility

Before using the Parametric Foot tool, ensure that the patient:

- Is **between 1 and 10 years old**
- Can be positioned in a **neutral foot alignment**
- Has foot measurements that fall within the supported minimum and maximum ranges
- Does **not** present fixed deformities or excessive bony prominences, as these cannot be represented by the algorithm

### Measurement Conditions

For accurate results:

- The patient should be **barefoot** (no socks)
- Measurements should be taken in a **non-weight-bearing position** (e.g. sitting with the foot hanging)
- For **metatarsal width measurement (J)**, apply pressure to splay the metatarsals, simulating full weight bearing

### Required Tools

- **Measuring tape** for circumferential measurements
- **Caliper** for length and width measurements

### **2. start of the process**

#### Step 1: Take the Foot Measurements

The Parametric Foot tool supports **18 total measurements**, of which **11 are mandatory**.  
All values must be entered in **millimeters (mm)** and fall within the defined limits.

### Mandatory Measurements

You must enter the following measurements to generate a parametric foot:

 

| - A – Smallest supramalleolar circumference - B – Instep circumference - C – Midfoot circumference (arch apex) | ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-02-39-6130-PM.png?width=670&height=368&name=image-png-Dec-18-2025-01-02-39-6130-PM.png) |
| --- | --- |
| - E – Foot length - F – Heel to 1st metatarsal head - H – Heel to 5th metatarsal head - J – Width between metatarsal heads - L – Heel width | ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-03-06-9997-PM.png?width=670&height=622&name=image-png-Dec-18-2025-01-03-06-9997-PM.png) |
| - N – Ground to medial malleolus height | ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-04-16-6920-PM.png?width=209&height=271&name=image-png-Dec-18-2025-01-04-16-6920-PM.png) |
| - P – Ground to lateral malleolus height | ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-06-27-3145-PM.png?width=222&height=278&name=image-png-Dec-18-2025-01-06-27-3145-PM.png) |
| - R – Width between malleoli | ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-07-30-7686-PM.png?width=247&height=238&name=image-png-Dec-18-2025-01-07-30-7686-PM.png) |

Optional measurements can be added to further refine the foot shape.

#### Step 2: Create the Parametric Foot

1. Open the **Parametric Foot** tool in Spentys
2. Enter the mandatory measurements (and optional ones if available)
3. Verify that:
   
     - All values are entered in **mm**
     - All measurements fall within the allowed ranges
4. Generate the parametric foot model

At this stage, the system uses the algorithm to recreate the patient’s foot geometry.

#### Step 3: Generate the Mold

Once the parametric foot is created, proceed to the **Generate Mold** tool to customize the fit.

You can adjust multiple offsets to improve comfort, clearance, and support.

#### Available Mold Adjustments

 

| **Image** | **Correction** | **Explanation** | **min limit (mm)** | **Max limit (mm)** |
| --- | --- | --- | --- | --- |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-11-26-5759-PM.png?width=97&height=68&name=image-png-Dec-18-2025-01-11-26-5759-PM.png) | Lateral Malleolus Offset | Adjusts the clearance around the lateral malleolus | 0 | 5 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-11-38-1907-PM.png?width=95&height=66&name=image-png-Dec-18-2025-01-11-38-1907-PM.png) | Peroneal Contour Offset  | Adjusts the shape along the lateral side of the foot, particularly the peroneal tendon area | -4 | 0 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-11-50-1869-PM.png?width=95&height=67&name=image-png-Dec-18-2025-01-11-50-1869-PM.png) | Base of 5th Metatarsal Offset | Alters the fit around the base of the 5th metatarsal, often for added width in this area | 0 | 5 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-12-04-8445-PM.png?width=97&height=67&name=image-png-Dec-18-2025-01-12-04-8445-PM.png) | Medial Malleolus Offset | Adjusts the clearance around the medial malleolus | 0 | 5 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-12-18-8011-PM.png?width=98&height=62&name=image-png-Dec-18-2025-01-12-18-8011-PM.png) | Pternion Offset | Adjusts the clearance at the achilles tendon insertion | 0 | 5 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-13-04-7923-PM.png?width=97&height=66&name=image-png-Dec-18-2025-01-13-04-7923-PM.png) | Navicular Offset | Adjusts the clearance around the navicular bone, to relief pressure | 0 | 5 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-13-19-5124-PM.png?width=97&height=67&name=image-png-Dec-18-2025-01-13-19-5124-PM.png) | ST Contour Offset | Adjusts the medial side of the foot, around the sustentaculum tali, often for added support or fit | -4 | 0 |

 

#### Toebox Customization

Additional adjustments can be made to the toebox:

- Extra length
- Extra height
- Extra width
- Lift angle (toe spring)

| **Image** | **Correction** | **Explanation** | **min limit (mm)** | **Max limit (mm)** |
| --- | --- | --- | --- | --- |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-20-58-9431-PM.png?width=97&height=87&name=image-png-Dec-18-2025-01-20-58-9431-PM.png) | Extra Length in Toebox | Adds extra length in the toebox for patients who require more space for the toes | 0 | 40 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-20-41-8380-PM.png?width=97&height=65&name=image-png-Dec-18-2025-01-20-41-8380-PM.png) | Extra Height in Toebox | Adds extra height in the toebox to accommodate high arches or larger toe volumes | 0 | 10 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-21-13-7799-PM.png?width=93&height=87&name=image-png-Dec-18-2025-01-21-13-7799-PM.png) | Extra Width in Toebox | Adds extra width in the toebox for wider feet | 0 | 10 |
| ![](https://help.spentys.com/hs-fs/hubfs/image-png-Dec-18-2025-01-21-27-9277-PM.png?width=93&height=70&name=image-png-Dec-18-2025-01-21-27-9277-PM.png) | Lift Angle in Toebox | Adjusts the upward angle in the toebox, influencing toe lift | 0 | 20º  |

These options help accommodate toe volume, high arches, or specific gait needs.

#### Step 4: Review and Finalize

Before finalizing:

- Double-check all parametric foot measurements
- Ensure mold offsets match the patient’s clinical needs
- Confirm values are realistic and within limits

Once validated, you can proceed with mold generation and continue your standard workflow.

### **Best Practices & Tips**

- Always verify patient eligibility before using the Parametric Foot tool
- Accurate measurements are critical — small errors can significantly impact fit
- Use optional measurements when available to improve precision
- Start with conservative mold offsets and refine as needed

### Video

Here is a video of the complete workflow. 

 

If you would like to download the protocol, please click on [this link](https://foot.spentys.com/protocol.pdf). 

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