A distance of 38 cm from the dentate line of the esophagus to the incisors is the normal range.
The distance of the dentate line from the incisors involves two anatomical positions, one is the incisors located in the mandibular part of the oral cavity, and the other is the dentate line where the mucosal folds of the esophagus travel to the lower end, converge and contract and terminate in a transverse line, which is histologically the intersection of the squamous epithelium of the esophagus and the columnar epithelium of the cardia, and it is named due to the fact that the two epitheliums are like the teeth of the canine biting each other.
The distance of the dentate line from the incisors is the distance from the incisors in the lower jaw to the folds of the esophageal mucosa under the gastroscope, and the average length of the incisors from the dentate line in normal adults is 39.53 (2.00) cm, of which 40.49 (1.88) cm in males and 38.85 (1.80) cm in females, which is within the normal range of the patients, and there is no need to worry about it too much.
The distance of the dentate line from the incisors is not only a reference for the position of gastroscopy, but also can indicate some disease changes, if the distance is too short, the dentate line may be moved upward for Barrett’s esophagus.