Related Experiment Video
Updated: Jul 14, 2026
Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
[A three-dimensional analysis of measuring occlusal contacts of complete denture]
Er-yi Lu1, Fu-qiang Zhang, Xiao-jun Chen
1Department of Prosthetics, School of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. lueryi222@yahoo.com.cn
Purpose:
This study was designed to analyze the complete denture occlusal contacts by three-dimensional digital technique.
Methods:
The artificial teeth occlusal surfaces of ten complete dentures were scanned by noncontact laser scanner and were reconstructed by three-dimensional technique. The locations and the numbers of occlusal contacts between the upper and lower full dentures were studied and measured in centric occlusal position, and further compared with the T-Scan system results by paired t test.
Results:
(1) The results of occlusal contacts indicated that occlusal contacts were concentrated on molars and premolars and there were only 2 contacts in the area of anterior teeth. (2) There was no significant difference between three-dimensional reconstructive systematic measurement and T-Scan systematic measurement (P > 0.05).
Conclusions:
This study verified the reliability of the measurement for occlusal contacts by the three-dimensional digital system, and may lead to a new way for occlusal contacts research. Supported by Shanghai Leading Academic Discipline Project (T0202).
Related Concept Videos
01:26Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
01:21Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.