Application of copying original lingual morphology of anterior teeth in ceramic crown design

Abstract

Objective To explore better methods of ceramic crown design and reduce foreign body sensation of prostheses by digitally replicating the lingual morphology of the original teeth in the patient's aesthetic zone. Methods Patients with anterior tooth defects were collected from July 2022 to December 2023 at Department of Second Clinical Division of the Affiliated Stomatological Hospital, Nanjing Medical University. Patients with crown prostheses designed using automatically matched tooth morphology from the tooth shape database served as the control group. Patients with crown prostheses designed using digital technology to replicate the lingual morphology of the original teeth were used as the experimental group. Differences in occlusal evaluation and foreign body sensation evaluation of the prostheses in the two groups were compared. Results Results showed that the minimal interocclusal distance of the experimental group was greater than that of the control group, and the difference was statistically significant. The occlusal evaluation of the prostheses in the experimental group was better than that of the control group, and the difference was statistically significant. The foreign body sensation of the prostheses in the experimental group was also less than that of the control group. Conclusion Prostheses designed using digital technology to replicate the original lingual morphology of the teeth have a better lingual occlusal relationship with less foreign body sensation and better comfort.

Keywords

• |dental morphology replication|oral scanning|prosthesis|aesthetic area