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ABSTRACT
Laterotrusive training is often used together with mouth-opening training in order to achieve adequate translation of the affected condyle in treatment of TMJ closed lock. This training is usually performed by voluntary laterotrusive movement (VLM) or by laterotrusive movement using only the fingers (FLM). However, satisfactory results are often not obtained by using these methods. To resolve this problem, we devised a new laterotrusive training device (LT device). In this paper, we describe the method of the training of laterotrusive movement using the LT device (LLM) and present a comparison of the results obtained by using LLM with those obtained by using VLM and FLM. The subjects were ten patients with TMJ closed lock. The following results were obtained: 1. the range of LLM was significantly larger than those of VLM and FLM; and 2. all of the patients reported that LLM could be performed more easily than VLM and FLM. In conclusion, the LT device is thought to be useful for laterotrusive training in TMJ closed lock.
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Notes on contributors
Kosetsu Komatsu
Dr. Kosetsu Komatsu graduated with a D.D.S. degree in 1989 from the Hokkaido University School of Dentistry and received a D.D.Sc. degree in 1997 from the same university. Dr. Komatsu is an instructor in the Department of Oral Functional Science at Hokkaido University Graduate School of Dentistry.
Taihiko Yamaguchi
Dr. Taihiko Yamaguchi received his D.D.S. degree from the Hokkaido University School of Dentistry in 1983 and his D.D.Sc. degree in 1987 at the same university. Dr. Yamaguchi is an associate professor in the Department of Special Clinic for Specific Disorders at Hokkaido University School of Dentistry.
Noboru Ohata
Dr. Noboru Ohata received his D.D.S. degree from the Hokkaido University School of Dentistry in 1973 and his D.D.Sc. degree in 1981 from the same university. Since 1997, Dr. Ohata has been a professor in the Department of Oral Functional Science at Hokkaido University Graduate School of Dentistry.