Dr. Morgan Gwin, Calgary AB


We were taught in dental school that tooth wear comes in 3 varieties: attrition, erosion, and abrasion. But what we weren’t taught is that attrition also comes in different varieties!

Pathway wear or the “constricted envelope of function” is one of three patterns of attrition that you may not have heard of, but you’ve likely seen in your patients. This lecture will teach you what “Pathway Wear” means, how to identify it in your patients, and what can be done to treat it. (HINT: It’s not a night guard). An interesting case presentation of “Invisalign gone-wrong” will be used to demonstrate treatment of a patient with Pathway wear.

Learning Objectives: 

  1. Identify the three characteristic wear facets patterns: edge-to-edge, pathway, and cross-over wear
  2. Describe the “Envelope of Motion” and how it differs from the “Envelope of Function”
  3. Describe the etiology of pathway wear
  4. Identify early and late signs of pathway wear
  5. Understand how the etiology directly relates to the treatment and restoration of patients with pathway wear

Bio:  Dr. Gwin is a prosthodontist in Calgary, AB who recently completed her Graduate Prosthodontics training at the University of Washington. Originally hailing from Edmonton AB, she studied Mechanical Engineering and Dentistry at the University of Alberta and spent three years in general practice in the Edmonton Area before returning to specialize as a prosthodontist.