Chew Test to Discover Functional Interference

I had a patient in a provisional on tooth #7, and he called to tell me he ate the crown. When he came in, I checked his occlusal marks in MIP, and there was a nice coupling with the opposing tooth. He was not hitting the tooth at all in protrusive, in right and left, and in crossover. He had not used floss and had not chewed on something sticky that would pull the provisional off. So, I put articulating paper between his teeth and used my iPhone to video him as he chewed like he was chewing food. What I discovered in the video is that he had a functional interference. He had broad strokes on the provisional whenever he was in his chew stroke.

I sent the video to the lab with the hope that the new information could be used to make a crown that would protect the tooth from breaking or becoming loose. This patient was adamant about not wanting orthodontics. I was able to show him why equilibrating his opposing tooth would be beneficial and he accepted equilibration.

Having run into this problem once, I am now checking for functional interferences with more patients by having them do “the chew test.”

Kelley Brummett DMD

Dr. Kelley D. Brummett was born and raised in Missouri. She attended the University of Kansas on a full-ride scholarship in springboard diving and received honors for being the Big Eight Diving Champion on the 1 meter springboard in 1988 and in 1992. Dr. Kelley received her BA in communication at the University of Kansas and went on to receive her Bachelor of Science in Nursing. After practicing nursing, Dr Kelley Brummett went on to earn a degree in Dentistry at the Medical College of Georgia. She has continued her education at the Pankey Institute to further her love of learning and her pursuit to provide quality individual care. Dr. Brummett is a Clinical Instructor at Georgia Regents University and is a member of the American Academy of Cosmetic Dentistry. Dr. Brummett and her husband Darin have two children, Sarah and Sam. They have made Newnan their home for the past 9 years. In her free time, she enjoys traveling, reading and playing with her dogs. Dr. Brummett is an active member of the ADA, GDA, AGDA, and an alumni of the Pankey Institute.

Kelley Brummett DMD

One thought on “Chew Test to Discover Functional Interference

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    August 25, 2020 at 10:12 am
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    So not a lack of freedom in centric issue more of a functional issue. Interesting, Thanks

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