A comparative study of the chewing cycles of dentate and denture-wearing subjects.

Patterns of incisal point movements during habitual and unilateral chewing of 35 complete denture wearers and a control group of 35 dentate subjects were analyzed using a Sirognathograph. The graphs of the lengths, angles, and envelopes of motion made during habitual chewing cycles by complete denture wearers were analyzed and found to be similar to those of dentate subjects. However, when analyzing the graphs of separate chewing cycles at the beginning of unilateral chewing, significant differences in the movement performance were found using the same parameters. The analysis of areas where some tooth contacts occurred defined the differences in performing contact movements during chewing.

Graphic assessment of interincisal point movements during chewing of hard and soft foods.

Interincisal point movements in 35 healthy, dentate subjects were investigated with an electrognathic apparatus. The main focus of the study was to find the average values of determined point graphic assessment in frontal and sagittal planes during chewing of hard and soft foods. However, as this was insufficient to obtain information on areas where occlusal contacts were reached, border movement envelopes were also recorded to obtain indirect information in connection to the previous task. The results showed that the graphic assessment form of mandibular movements was dependent on the consistency of the food that was chewed.