The concept of denture frame, both the vertical and horizontal relationship of the dentitions are ultimately related to a skeletal configuration, leads to postulate that the vertical overbite will be determined by the jaw rotations and anteroposterior jaw relationship. Also, ODI is analyses to be composed of the determinant factors of overbite such as FMA, PPA and FABA. From the geometric analyses of an interrelationship between the ODI and the overbite determinants, the following formula can be induced : ODI norm =85degrees- 0.5PMA-(1.08-0.01 FMA)(FABA-81degrees). This formula indicates that the norm of ODI is not constant value but variable one accordint to the individual skeletal frames. Through the application of the formula to the various clinical cases, it is proved that the new concept, relativity of the ODI norm, is very diagnostically useful.
Dentition ; Dentures ; Jaw ; Overbite*

No abstract available.
Animals ; Electromagnetic Fields* ; Magnets* ; Rats*

In almost all biologic systems, mechanically induced electric charge separation is a fundamental phenomenon. Since the hypothesis was established that the generation of electric potentials in bone by mechanical stress including muscular force might control the activity in bone by mechanical stress including muscular force might control the activity of osseous cells and their biopolymeric byproduct, the concept of electrically mediate growth mechanism, which involves biological growth and bone remodeling by any means, in living systems has been applied clinically and experimentally to orthopedic fracture repair, the regulation of orthodontic tooth movement, epiphyseal cartilage regeneration, etc. On the other hand, recent numerous research data available show apparently that the mandibular condyle has the characteristics of growth center as well as growth site. In addition, there exists a considerable difference of opinion as to the role of external pterygoid muscle in condylar growth. In view of these evidences, this. experiment was performed to investigate the effect of the galavic current on the growth of the mandible and condyle for elucidating the nature of condylar growth. The bimetallic device was composed of silver and platinum electrode connected with resistor (3.9 Mohm), which was expected to produce galvanic current of 23.6 nA according to the galvanic principle. The 25 Sprague-Dawley rats were divided into two group, 2 week group comprising 8 animals exposed to galanic current for 2 weeks and 3 control animals not exposed for 2 weeks, 4 week group comprising 10 animals in experimental group and 4 animals in control group applied for 4 weeks respectively. The experimental rats were subjected to application of the galvanic current invasively to codylar head surface and the control groups with sham electrode. On the basis of anatomic and histologic data from the mandibular condyle of experimental and control group, the following results were obtained. 1. After 2 weeks, there was no increase of mandibular size in experimental group over that of the control group. 2. After 4 weeks, the size of the condylar head was larger in experimental group than that of the control. 3. In 2 week group, the thickness of the mitotic compartment and hypertrophic chondroblastic layer was increased in experimental group. 4. In 4 week group, the number and the size of the hypertrophic chondroblasts were increased significantly on experimental group over that of the control group. 5. The application of the galanic current caused an increase in chondrocytic hypertrophy and intercellular matrix in both groups.
Animals ; Biopolymers ; Bone Remodeling ; Chondrocytes ; Electrodes ; Growth Plate ; Hand ; Head ; Hypertrophy ; Mandible ; Mandibular Condyle ; Orthopedics ; Platinum ; Pterygoid Muscles ; Rats* ; Rats, Sprague-Dawley ; Regeneration ; Silver ; Stress, Mechanical ; Tooth Movement

As modern society ages rapidly, the number of people with dementia is sharply increasing. Direct medical costs and indirect social costs for dementia patients are also increasing exponentially. However, the lack of social awareness about dementia results in difficulties to dementia patients and their families. So, understanding dementia is the first step to remove or reduce the stigma of dementia patients and promote the health of our community. Alzheimer's disease is the most common form of dementia. The term, ‘Alzheimer's disease’ has been used for over 100 years since first used in 1910. With the remarkable growth of science and medical technologies, the techniques for diagnosis and treatment of dementia have also improved. Although the effects of the current symptomatic therapy are still limited, dramatic improvement is expected in the future through the continued research on disease modifying strategies at the earlier stage of disease. It is important to look at the past to understand the present and obtain an insight into the future. In this article, we review the etymology and history of dementia and previous modes of recognizing dementia. We also review the historical developments leading to the terminology of Alzheimer's disease.
Alzheimer Disease* ; Dementia ; Diagnosis ; Humans ; Terminology as Topic

No abstract available.
Radiosurgery* ; Trigeminal Neuralgia*

no abstract available

No abstract available.
Humans ; Methacholine Chloride* ; Rhinitis*

Carcinoid-type tumorlets of the lung are nodular microscopic proliferation of round and spindle-shaped small cells which originated from bronchial or bronchiolar Kulchitsky-type neuroendocrine cells, which are usually encountered as an incidental finding during microscopic examination of the lungs at autopsy or surgically removed for bronchiectasis or other reasons. We report one case of carcinoid-type tumorlets in the lung which was surgically removed from a patient who had bronchiectasis, and the cells of tumorlets showed immunohistochemical reactivities for markers of epithelial and neuroendocrine differentiation.
Autopsy ; Bronchiectasis ; Humans ; Incidental Findings ; Lung* ; Neuroendocrine Cells

The laryngeal mask airway(LMA) is an alternative to tracheal intubation, especially in out-patient surgery or securing emergency airway. Several studies show that N2O diffuses into the cuffs of endotracheal tubes and increases the cuff pressures. Because LMA also has an air-filling cuff, the cuff pressure of LMA may be increased during general anesthesia with N2O. The purpose of this study was to evaluate the effects of LMA on the changes in the cuff pressure of the LMA during general inhalation anesthesia. In this study, we measured the cuff pressure of LMA after administration of 0%(group A), 50%6(group B), 60%(group C) or 66.7%o(group D) N2O with the air-inflated cuffs, and also measured the cuff pressure of LMA after administration of 66.7% N2O(group E) with the 66.7% N2O-inflated cuffs during general inhalation anesthesia. In group A, there was no significant cuff pressure change throughout the study period. In group B, C and D, the cuff pressures gradually increased as time elapsed and the more increased the concentration of N2O, the more increased the cuff pressures. In group E, the cuff pressure abruptly decreased until the first five minute, but recovered gradually and slightly increased than the baseline value for the rest of the measurement period. These findings demonstrate that N2O administration during general inhalation anesthesia significantly increases the cuff pressure of LMA in a concentration- and time-related fashion with the air-inflated cuffs but not with the N2O-inflated cuffs, and suggest that such increases may result in ischemia on cuff-related laryngeal area, and N2O-inflated cuffs may prevent increasing the cuff pressure of LMA.
Anesthesia, General ; Anesthesia, Inhalation* ; Emergencies ; Humans ; Inhalation* ; Intubation ; Ischemia ; Laryngeal Masks* ; Outpatients