The applicant sought statutory accident benefits following a motor vehicle accident, claiming she sustained a catastrophic impairment.
The central issue was whether the applicant met the 55% Whole Person Impairment (WPI) threshold under the AMA Guides.
The applicant relied on a 12% WPI rating for a temporomandibular joint (TMJ) diagnosis.
The Tribunal found that the applicant failed to establish on a balance of probabilities that the TMJ diagnosis was caused by the accident, applying the "but for" test.
Without this 12% rating, the applicant's WPI fell short of the 55% threshold.
Consequently, the applicant was not deemed catastrophically impaired and was denied entitlement to the disputed medical, rehabilitation, and case management benefits, as more than 260 weeks had elapsed since the accident.