There were many researches on the application of permanent magnet to a retainer of a removable denture in this society. In addition to that kind of the application, it has advantages in a remote measuring. It generates magnetic field by itself, and it is possible to detect the position of it placed in a mouth with non-contact methods. So it has been utilized for measurements of tooth, tongue and jaw movement. Utilizing alternating-current magnetic field generated with electric coil, however, makes it possible to improve the precision and to achieve multi-degrees of freedom of a measurement method. Practical application of magnetic field is very useful for elucidating stomatognathic functions ; especially visualization of occlusion in a state of motion is expected for the future. In this paper, I would like to describe the method that improved the linearity and the measuring range of the fluxgate sensor, and the measuring system of which the flexibility was improved with increasing the ratio of the data processing with software.
It is best to visually and manually examine a patient when we want to know details regarding what is inside the oral cavityCand consider treatment options. However, it is frequently impossible for a dentist, other than the patient's regular dentist, to have access to this information. In the past, When an information exchange was necessary, Kennedy's and Eichners classification methods were applied as a means to understand these type of cases. The usefulness of these classification methods is widely known. With the popularization of magnetic attachments in recent years. We have come to frequently use the method of making an overdenture using a rhizoplane attachment on the anchor tooth. Along with this change, we need to simplify overdenture classification to facilitate its use as a means of exchanging patient information. However, this proposed classification method has not yet been suggested. In this study, we focused on the supportive function of the coping installed under the denture base, and would like to propose an idea regarding the classification method of canine tooth|centered complete overdentures. The following is a report of this study. I would like to introduce how this classification method can be used easily and effectively.
It is required to develop a magnetic attachment which has large restoring force to resist the reduction of magnetic force due to deformation of the alveolar ridge and dentures. We proposed the split pole type of magnetic attachment with three magnets. It has larger restoring force compared with that on the market. But its structure of the magnetic assembly is complicated, and there are some difficulties on making the assembly. To overcome the difficultiesCthe new split pole type of magnetic assembly with slantly magnetized magnets is proposed here. It has a simple structure and large restoring force.
Magnetic attachments have been widely used
for prosthetic dentistry in Japan. Many reports
about their clinical applications, load-distribution
and effects on the surrounding tissues have
been published. The purpose of this study
was to investigate their effects on the body
balance of human beings. Five male volunteers
were chosen for this study. Three magnetic
attachments were adhered to custom-made dental
splints. Body balance was measured before
and after the magnetic attachments were adhered.
The results failed to show a significant
change in path length or spontaneous postural
sway envelope with eyes open or closed, we
therefore concluded that magnetic attachments
do not affect body balance.
Ken Iida, Minoru Abe, Toshio Hosoi, Fujio Tsuchida, Yukihiro Mizuno, Tadashi Furuya
We reported that Metal structural konus telescope denture used for over 20 years was reformed and revived with magnetic attachment and laser welding technique. In this clinical report, a procedure is described for repair of a removable denture. This procedure obviates the reproduction of a new denture in short-term.