1. Check instructions on Lab Form
The real work should exactly match everything on the lab sheet. For example, if it is meant to be PFM metal copings, then the case should not be finished. Also, all the accessories should be present, and the stone models ought to be clean and neat.
2. Check margins
In order to make sure that the fitting is good, our QC needs to check the margins. We cannot believe our naked eyes, so the help of magnifying device is necessary. Based on the red line, technicians check whether the margin is too long or too short – the margin should precisely end at the red line.
3. Check contacts
Our QC mounts the dental work onto the working model first, to check if the contact is right. Please check the spot where the pencil point is. It is where we need to check the contact. Under the right lighting environment, we can see there is no gap between the natural teeth and the restoration, proving that the contact is great. Second, the QC mounts the dental work onto the study model, to check the contact – this is important, because the study model displays patient’s real oral condition. If the contact here is correct, then everything should be fine.
4. Check occlusion
Technicians articulate upper and lower models, to check if the occlusion is right. Normally, there is a tiny space between the upper and the lower models unless dentists require an “In Occlusion”. After that, technicians examine lateral excursion (the left side) – simulate the daily chewing movements to check occlusion. Later, the right side will also be checked.
5. Check shade
Technicians check shade with the shade guide, at different angles and under good lighting environment. Later, technicians check the shade in a different lighting condition, usually under dimmer light. This is necessary, since the shade can be different in various lighting conditions and at different angles.
6. Check Anatomy
Whether the anatomy is good or not largely depends on the technicians’ aesthetic capabilities. A good crown should be full of details, and should fully consider the shape of the adjacent teeth. Technicians also need to check if the arch is proper and beautiful.
7. Check surface
The surface of the whole crown or bridge should be smooth – no burs, no sharp edges. Our QC will make sure that there is nothing clinging to the surface – no bubble and no dust. So the dental work can be clean and neat.