What is the Partial Matching?

Table of Contents

Partial Matching Introduction

Today, I will talk about ScanApp. As ScanApp has been updated, it has many convenient features. I am going to introduce one of the added features, “Partial Matching”. It is very difficult to match the data if a common part is very small. However, the partial matching feature makes it very convenient to match different scan data. For those of you who don’t understand it yet, I’ll show a real case and explain it slowly.


Case Introduction

The case that we are going to look at is an implant case. With a wax-up pattern on an implant abutment case, you need to match the data after scanning the implant abutment and then the wax-up. The common part is very small, right? The implant substructure has to be matched with very limited data. Matching is often failed with this case. Let’s take a look at how to apply the improved partial matching with that case.


First, let’s create a project in exocad. The name of the project is “Partial Matching Test”. Click the tooth #34, wax-up, and select Yes for “Scan waxup?” option. I will also select the adjacent tooth. Click Save.


Scanning the case

I usually use a multi-die when scanning an implant case, but since it’s a single case, I’ll proceed without using a multi-die.

Scanning the base model

First, scan the base model.

Scannning the implant abutment

Next, let’s scan the implant abutment.

After the scan is complete, I will leave only the necessary part and delete the rest. The data remain like the image below.

Scanning the wax-up pattern on the abutment

Next, I’ll place the wax-up pattern on the abutment and scan it. After scan is complete, delete the unnecessary part.

Matching data by existing method

As you can see, the matching is failed.

After clicking refresh, I’ll match the data by three points matching which is the usual method. I click one point on the buccal side, one point on the distal side, and the last point on the mesial side.

The matching is failed again as you can see.

As you see on the image above, matching is failed even with the three points matching. It is because the common part which is the implant substructure is very small. Now, let’s take a look at how to match this case.

Partial Matching

This brush icon is the new feature, partial matching.

Click on it and color the common part.

It is colored blue like the image below. You can also adjust the brush size by pressing the control key and scrolling your mouse wheel. Don’t worry if you color wrong parts. Just press the shift key and delete it.

After coloring it, I use three points matching again. Can you see it? It is perfectly matched with only the selected part.

Let’s proceed the abutment. As usual, I use three points matching. It is matched well. Matching is complete. As you can see, the matching is done perfect.

In the past, this was very difficult to make because the common part was very small. However now, with the partial matching feature, we can easily produce difficult cases. It’s not just for an implant case. Even an abutment case, partial matching can be applied if the common part is small. So far, I have introduced the partial matching feature.

Thank you for reading my content. I will be back with another good content.



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