It has been reported that the polymerization time of acrylic resins is reduced considerably by application of microwave energy to the FRP dental flask during denture processing. However, a superior quality denture may not be obtained when conventional heat curing resins are used with this microwave polymerization process.
We have developed a new acrylic denture resin for use especially with microwave polymerization. We found no problems with denture porosity or heterogeneous polymerization when this microwave resin was used in place of conventional ones. Microwave irradiaton also makes possible a very short curing time of only three minutes and produces an excellent polymer.
The denture fabricated using this process has superior adaptability and the bond strength with resin teeth exceeded our expectations. It is thus possible to make a denture in a very short time using the microwave curing technique. This is considered a very useful technique.

View full abstract

Long-term loss of occlusal vertical dimension causes parafunction and changes in the nature of the oral cavity during the life of the patient. We often see cases where the mandible drifts forward in a habitual position resembling an Angle class III type of occlusion. If an adequate prosthesis with increased vertical dimension is placed, it will allow the condyles to gradually assume the correct position in the fossa.
There is much controversy about the advantages and disadvantages of increasing occlusal vertical dimension. The important point is to use diagnostic appliances and carefully observe the response and occlusal function for as long as possible during the initial therapy. Much more attention must be paid to clinical re-evaluation prior to placement of the final prosthesis if the teeth are periodontally involved since the goal of occlusal treatment is to achieve a self-stabilizing occlusal relationship.
This article discusses the diagnostic evaluation, treatment planning, and clinical procedures for pseudo-class III type occlusal problems in clinical practice.

View full abstract

I have already discussed my opinions on how occlusal disturbances affect people's lives. Delivery using forceps may cause abnormalities in the temporomandibular joint, and the pressure from a twin's buttocks while in the womb may make the sibling's head rhomboid in shape, disturbing its symmetry. These people often have“hearts”and“bodies”which are nervous and sensitive. Marital problems promote thumb sucking resulting in an open bite and stiff neck in children, as well as making them susceptible to children's diseases. The problems of missing teeth become worse with age leading to dentures, proceeding to stiff necks, headaches, hip pain, numbness in the extremities, heart disease, high blood pressure, and senility, with life ending in a early, unhappy death. Dentists will have a very bright future when we contribute to people's health through their teeth, give them a prosperous and happy life, become needed by all, as well as being loved and respected.

View full abstract

Gnathology has made great contributions to the diagnosis and treatment of occlusion. Prevention of cuspal interferences is possible by proper use of the articulator, thus confirming the validity of gnathological principles and techniques. The practice of gnathology has been criticized since the need to deal with the fully-adjustable articulator for recording mandibular movement is time consuming and the use of the instrumentation requires special training.
Since the Cyberhoby computer system was developed in 1983, the use of the pantograph and fully-adjustable articulator instrumentation has become much simpler and less time consuming.
This report has two purposes. First, the time saving instrumentation for this system will be shown. Secondly, the accuracy of the occlusal surface of the wax pattern fabrication for the posterior teeth are compared for the non adjustable, semi-adjustable and fully-adjustable articulators.

View full abstract

The following knowledge has been obtained from clinical cases of the prosthetic reconstruction of Angle class II cases where bilateral balanced occlusion was imparted.
1. Approximately 60% of the full denture cases involved an Angle class II arrangement of the teeth. It is difficult to obtain anterior guidance in these class II cases, suggesting that occlusal damage may readily occur. However, good results were obtained by imparting bilateral balanced occlusion in such cases.
2. Imparting bilateral balanced occlusion in Angle class II cases seems to create freedom in centric.
3. Bilateral balanced occlusion should always be imparted when waxing full mouth cases. Then it is good to construct group function and in the end impart cuspid guidance.

View full abstract

H.I. (Human Identification) system is a dramatic new system for identifying individuals (and objects) . This system which will become a new“added value”in the dentistry field, offers great conveniences to individuals, as well as to the nation and the international economy.
H.I. system offers necessary informations for personal identification and emergency medical treatments at the 24 hr-stand-by information center with the presentation of the code number entered by computer manipulated laser beam on to the 20-30μ thick, 2 mm wide, stainless-steel or titanium made wafer adhered onto the tooth.
This wafer can be adhered without anesthesia or tooth erasing, by the use of special, painted on with a brush in a simple five minute operation.
This wafer lasts a lifetime, and even longer; for instance, providing facts to prove the deceased's ideas on internal organ transplantation, or his will. It is clear that this system will play a great part in ensuring a safe and advanced society.
For the dentistry world, the H.I. wafer will produce a totally new demand for its adhesion and management, and at the same time augmenting the social role played by dentists.
I have made a brief report on the H.I. system with the conviction that dentists are on their way to playing a larger role in providing safer and sounder everyday life.

View full abstract