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T-Scan® III: The Occlusal Analysis Solution


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T-Scan® III / BioEMGTM and Disclusion Time Reduction

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It has been observed from EMG analyses performed on the massetter and temporalis muscles during excursive function, that if Anterior Guidance contacts control the mandibular excursion by discluding posterior teeth, the contractile micro-volt levels present in these muscles will be lessened.

The integration and synchronization of the T-Scan III Occlusal Analysis system with the Biopak Electromyography system affords the operator real-time recording of occlusal contacts with exact time stamped electrical potential of selected masticatory muscles resultant from those tooth contacts captured in a dynamic "movie form".

T-Scan III and EMG data below describing the occlusal and muscular changes resultant from the group function occlusion pre-treatment compared with the T-Scan III and EMG data changes resultant from shortening the lengthy pre treatment Disclusion Time (>.5 seconds) to a post-treatment measurable immediate posterior disclusion (< .5 seconds).
Before

Pre-treatment MIP Occlusal contacts and EMG data		 After

Stronger muscles result from the more widespread occlusal contact arrangement in post treatment

Before

.481 seconds into the excursion; many interferences present during the group function; EMG levels elevated
After

.337 seconds into the post op excursion; balancing interference disclusion reached and EMG levels dropping

Before

.819 seconds into excursion; working and balancing interferences still present; EMG levels elevated except non-working temporalis
After

.481 seconds into the post op excursion; complete disclusion reached and EMG levels very low.
(Disclusion Time <.5 seconds)

Before vs. After

1.17 seconds into excursion; balancing interference is endpoint; EMG levels finally drop as group function
ends (Disclusion Time > .5 seconds)
Before and after treatment EMG at .481 seconds into each excursion; 4-5x less muscle activity post treatment with immediate posterior disclusion vs. group function.

The final figure (above) illustrates that the length of time that posterior teeth maintain functional contact during excursive movements directly impacts the levels of muscle contractions present for the entire duration of the same excursion. The degree of muscle activity can be greatly lessened by a rapid posterior disclusion. Measurable immediate posterior disclusion insures that excessive muscle contractions drop to levels that are much closer to resting state levels, while patients’ muscles are operating during occlusal function.

References available upon request.

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