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Gnathology and Occlusion Lab
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The lab studies temporomandibular disorders, working out how the jaw joint, the jaw muscles, and the bite are related.
AboutAbout the lab
Uncovering how the jaw joint and muscles work.
The Gnathology and Occlusion Lab studies functional disorders of the masticatory muscles and temporomandibular joint, and how to treat them.
The lab works to clarify how the masticatory muscles, the temporomandibular joint, and the bite (occlusion) relate to one another.
Faculty members also see patients at the specialist temporomandibular disorder outpatient clinic in the Temporomandibular Joint Treatment Unit at Hokkaido University Hospital.
Key terms
- Bruxism
- Teeth grinding or clenching. It can occur during the day as well as during sleep.
- Temporomandibular joint disc
- Tissue between the bones of the jaw joint that acts as a cushion.
- Electromyography (EMG)
- A record of the tiny electrical signals produced when muscles move. It shows how the muscles are working.
ResearchResearch themes
The lab studies functional disorders of the masticatory muscles and temporomandibular joint and their treatment, and works to clarify the relationship among the masticatory muscles, the temporomandibular joint, and occlusion. It also investigates what bruxism is actually like and how an abnormal bite affects the jaw.
Research on Bruxism (Teeth Grinding)
Using a newly developed ultra-compact, cordless nocturnal bruxism analyzer, the lab examines what teeth grinding is actually like during the day and during sleep, and how effective treatment is. It also studies how stress and sleep apnea are related to bruxism.
*Illustrative imageResearch on the Masticatory Muscles
By analyzing muscle potentials with electromyography and analyzing muscle force by measuring occlusal contact pressure, the lab aims to establish diagnostic criteria for masticatory muscle disorders and to clarify their causes. It also examines how therapeutic oral appliances (splints) affect masticatory muscle activity.
*Illustrative imageAbnormalities of the Temporomandibular Joint Disc
The lab examines how abnormalities of the temporomandibular joint disc affect the position of the lower jaw and the position at which the teeth meet.
*Illustrative imageOcclusal Abnormalities
The lab studies examination methods for detecting occlusal abnormalities that are hard to notice from the outside, and how occlusal abnormalities affect the masticatory muscles and the temporomandibular joint.
MembersFaculty
Faculty members of the Gnathology and Occlusion Lab also provide care for temporomandibular disorders at the Temporomandibular Joint Treatment Unit, Center for Advanced Oral Medicine, Hokkaido University Hospital.
- LecturerAkihito Gotoda
- Assistant ProfessorSaki Mikami
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Hard splint mouthguard ( )” Lee Haywood from Wollaton, Nottingham, England / CC BY-SA 2.0 (cropped)
- Research on the Masticatory Muscles: “Erv EMG” My father is the person in the photo. He passed and I found this in his personal photos. / CC0 (cropped)
- Abnormalities of the Temporomandibular Joint Disc: “Gray309-en” Jmarchn / CC BY-SA 3.0 (cropped)
- Occlusal Abnormalities: “Liberty Wing's Dental Lab (8419846)” U.S. Air Force photo by Airman 1st Class Alexander Vasquez / Public domain (cropped)
- Related lab (Oral Functional Prosthodontics Lab): “Making of complete denture 28” Werneuchen / Public domain (cropped)
- Related lab (Crown-Bridge and Implant Regenerative Prosthodontics Lab): “Single Unit Zirconia Anterior Dental Crown” James Roback, UticaDentalLab / CC BY-SA 4.0 (cropped)
- Related lab (Oral Functional Anatomy Lab): “Gl.submandibularis” Rollroboter / CC BY-SA 4.0 (cropped)
- Related lab (Oral Physiology Lab): “Microscope for Electrophysiological Research and Recording Equipment” Robert Cudmore from Marseille, France / CC BY-SA 2.0 (cropped)
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