Intraoral occlusal telemetry. Part V. Effect of occlusal adjustment upon tooth contacts during chewing and swallowing

This study compared the mandibular position at chin-point guided jaw closure, intercuspation and final deglutition (position at the end of swallowing) in 159 asymptomatic subjects and 142 subjects with symptoms in the craniomandibular system. The symptomatic subjects were assigned to four groups showing an adapted centric posture, pain, luxation with reduction of the temporomandibular joint and pain with luxation and reduction. Computer equipment aided recording of hinge axis movements in three dimensions. While the three positions differed significantly in anterior-posterior direction on both sides and in inferior-superior direction on the right, a significant difference between asymptomatic and symptomatic subjects existed only in final deglutition on the left side and in the anterior-posterior location of the guided closure. Final deglutition did not coincide with the guided closure or the intercuspation in approximately 89%. A proportionally large standard deviation gave evidence against a strict relationship of the three positions in asymptomatic and symptomatic subjects. Because of this variability, final deglutition was not recommended for verification of centric relation or the intercuspal position.

Section: Discussionmentioning

confidence: 99%

“…All subjects were instructed for computerized recording of hinge axis movements* referenced to the axis orbital plane ( Fig. 1 ;Slavicek, 1988;Piehslinger et al, 1991). A mandibular brass clutch, customized with acrylic resin † , was cemented to the facial surfaces of the mandibular teeth.…”

Section: Recording Equipmentmentioning

confidence: 99%

Mandibular position at chin‐point guided closure, intercuspation and final deglutition in asymptomatic and temporomandibular dysfunction subjects

Čelar

Kundi

Piehslinger

et al. 2000

“…In the present study the experimental interference was chosen to interfere in the intercuspal position as it has been shown that this position is mostly used during chewing as well as during swallowing (Pameijer etal, 1970;Woda, Wigneron & Kay, 1979) even after occlusal adjustment (Pameijer et al, 1970). The muscular activity during mastication has been reported to be positively correlated to stability in the intercuspal position, and a tendency has been observed for the bolus to be placed on the side with the greatest lateral stabihty (Bakke, M0ller & Thorsen, 1982).…”

Section: Discussionmentioning

confidence: 99%

Influence of experimental interfering occlusal contacts on the activity of the anterior temporal and masseter muscles during mastication

Riise

Sheikholeslam

1984

Quantitative electromyography (EMG) was used to study, in eleven volunteers with complete, natural dentitions, the effects of an experimental intercuspal occlusal interference on the pattern of activity of the anterior temporal and masseter muscles during mastication. The results show that a small occlusal interference (about 0.5 mm) in the intercuspal position can change the co-ordination of muscular activity during mastication. In general, there was a prolonged contraction time as well as a reduction of the activity in all the investigated elevators, especially on the side of the interference. Furthermore, after 48 h several subjects preferred to chew unilaterally. After removal of the interference, the pattern of co-ordination of muscular activity returned almost to the pre-experimental pattern within 2 weeks.

“…Most studies using an intra‐oral telemetry system have found that the RCP is rarely used during chewing and is used only infrequently during swallowing, and consequently that the RCP is not a functional position (Graf & Zander, 1963; Pameijer et al. , 1968, 1970a,b; Glickman et al ., 1969). This may be one of the reasons why a relationship between unilateral contacts in the RCP and TMD has not been found in most studies in agreement with the results of the present study.…”

Section: Discussionmentioning

confidence: 99%

Occlusal conditions just after the relief of temporomandibular joint and masticatory muscle pain

Fujii

2002

When the signs and symptoms of temporomandibular joint disorders (TMD) are present, it is possible that occlusal conditions and mandibular movements are changed. Accordingly, the presence of occlusal interferences may be misjudged. It is therefore reasonable to consider that occlusal conditions should be examined just after the relief of symptoms. The comparison of occlusal conditions in 52 temparomandibular joint (TMJ) pain patients and 27 muscle pain patients with that in 60 asymptomatic controls was made. Occlusal examination in the patients was administered just after the relief of pain by bite plane therapy alone. The only occlusal factor which was associated with pain symptoms was no canine contact on the working side on laterotrusion. It is suggested therefore that further studies as regards this type of interference should be performed.