The implant abutment is a part of the implant that emerges from the bony part. It serves as a foundation of the crown. In general, stock abutment is an easy and practical options. However, there are some situations that require a custom-made abutment. For example, where the gum level is not flat (terminal tooth of each individual side). The CAD-CAM technology is very helpful making a perfect abutment for each patients.
With computer design, the size and shape can be ideal, perfectly matched the gum level of the patient. Moreover, the crown can be precisely designed at the same time, improving fitting. Also, the thickness of the crown material can be consistent improving the strength and the longevity of the crowns.