Animals ; Calcium Sulfate ; Osteogenesis ; Periosteum ; Rats ; Skull

Since the concept of osseointegration was introduced by Branemark of Sweden, dental implants have been used for various dental prosthetic treatments. The survival rate of dental implant is likely to be closely related to the total biomechanical role of each component of implant system. The use of interchangeable component is very attractive for dental practitioners because such an approach would save treatment cost, flexibility of prosthetic treatment options as well as conveniences. Therefore, the use of interchangeable implant system has been increasing without scientific assessment of safety and efficacy of various interchangeable implant system. The purpose of this study, therefore, were to compare the geometric characteristic of four interchangeable dental implant screws and the loosening torque of these screws. Four types of dental implant screws tested in this study were Nobelpharma, 3i, Impla-med, Restore. Four screws each of the test specimens were subjected for scanning electron microscopic examinations under the same condition and a 35x magnified standard SEM picture was objected from each test specimen using JSM-5200 scanning microscope. From each of the SEM pictures, eight parameters, i.e., diameter of screw head, screw length, thread pitch, major diameter, neck diameter, neck length, crest width and root width were determined using a caliper. The measurement for each parameters were then corrected for their magnification factor. The loosening torque were also determined by using a torque gauge. All of the measurements were statistically analyzed by ANOVA test and multiple range test. Statistical significance was set in advance at the probability level of less than 0.05. All analyses were done with SPSS software for the personal computer. The conclusion obtained from this studies were summarized as the following; 1. No statistically significances were noted in the thread pitch, and crest width in the four screws, and in the case of major diameter, the Impla-med screw was significantly smaller than the other three screws (p<0.05). Therefore, four implant bolts could be physically inserted in a abutment nuts. 2. The diameter of screw head was decreased in the order of Restore, 3i, Nobelpharma, Impla-med screws and the length of screws were decreased in the order of 3i, Restore, Nobelpharma and Impla-med. The diameter of neck was decreased in the order of Impla-med, Restore, Nobelpharma, 3i screws. The differences of each of these parameters were statistically significant (p<0.05). The width of root of screws were decreased in the order of Nobelpharma, Impla-med, Restore and 3i. The differences among Nobelpharma and Impla-med, Restore and 3i were statistically significant (p<0.05). 3. When the screws were loosening 1, 3, 4 and 5 times, the loosening torque for Impla-med and 3i screws were significantly higher than that of Nobelpharma or Restore screws (p<0.05). However, when statistically smaller than that of 3i, Restore or Nobelpharma screws (p<0.05).
Dental Implants ; Head ; Health Care Costs ; Microcomputers ; Neck ; Nuts ; Osseointegration ; Pliability ; Survival Rate ; Sweden ; Torque

No abstract available.
Polydactyly*

For the improvement of denture fitness of changed residual ridge, denture liner can be used. Denture liner should be very stable physically in various environments of the mouth as well as be bonded strongly with denture resin. In this study, the specimens bonded with four kinds of soft denture liner and three kinds of hard denture liner were used to test the physical properties of the liners. All experimental groups were stored in 37+/-1degrees C distilled water for 24hours, followed by thermocycling between 15degrees C and 45degrees C with 15 second dwell time. 1000, 2000, 3000 cycles of thermocycling were excuted and physical properties were measured by Instron Universal Testing Machine. The obtained results were as follows: 1. In tensile bond test of soft liners, it was shown that both of Molloplast-B(R) specimens before and after thermocycling had the highest tensile strength, and in case of hard liners, Dura-liner II(R)speimen had the highest tensile strength before and after thermocycling. Depending on thermocycling, Soft-Relining(R), Denture-Relining(R),Molloplast-B(R), Coe-soft(R) and Kooliner(R) specimen showed significant difference(p<0.05). 2. In strain test of soft liners, it was shown that Molloplast-B(R) specimen before thermocycling and the Coe-soft(R) after thermocycling showed highest results, and in case of hard liners, the Dura-Liner II(R) speimen before and after thermocycling had the highest result. Depending on thermocycling. Denture-Relinig(R). Molloplast-B(R) and Dura-Lner II(R) specimen showed significant difference(p<0.05). 3. In Maximum distance test of soft liners, the Molloplast-B(R) specimen before thermocycling and the Coe-soft(R) after thermocycling showed highest results, and in case of hard liners, the Dura-Liner II(R) specimen before and after thermocycling showed highest results. Depending on thermocycling, Denture-Relining(R), Molloplast-B(R) specimens showed significant difference(p<0.05). 4.In elasticity test of soft liners , the Molloplast-B(R) specimen before and after thermocycling showed highest results, and in case of hard liners, the Dura-Liner II(R) specimen before thermocycling and the Tokuso-Rebase (R) after thermocycling showed highest results. Depending on thermocycling, Soft-Relining(R) , Molloplast-B(R) specimens showed significant difference(p<0.05).
Denture Liners* ; Dentures* ; Elasticity ; Mouth ; Tensile Strength ; Water

No abstract available.
Animals ; Aorta, Thoracic* ; Rats*

No abstract available.
Electromyography* ; Hand* ; Humans ; Muscle Spasticity* ; Stroke*

Obesity is a chronic relapsing disease associated with cardiovascular disease and cancer with a growing incidence. Since obesity is a complex disease that is affected by a variety of factors, including social, cultural, and environmental factors, it should be approached by establishing an integrated and comprehensive treatment strategy. It is difficult to achieve a sufficient amount of weight loss in most obese patients through lifestyle interventions alone, so pharmacotherapy in primary care should be actively considered as an additional treatment. Currently, there are four drugs that can be used for long-term weight management in Korea: orlistat, naltrexone/bupropion, phentermine/topiramate, and liraglutide. Sympathomimetics, such as phentermine, diethylpropion, phendimetrazine, and mazindol, can only be used for short-term treatment. These drugs can induce weight loss by suppressing appetite or inhibiting fat absorption in the gut. The prescription of such drug treatments should be based on evidence-based clinical care and tailored to the patient. Patient-tailored obesity drug treatments should be performed taking into consideration the advantages, side effects, and safety issues of each drug. Considering that obesity is a chronic disease that must be controlled for a lifetime, obese patients should be guided by clinicians to maintain their weight sustainably by setting common and realistic goals.

Pellegrini-Stieda's disease is a post-traumatic disorder of the knee. It is characterized by a crescentric-like bony formation in the region of the medial condyle of the femur, which usually makes its appearance upon roentgenographic examination three or more weeks after injury to the knee. During the three and a half years from January 1979 to July 1982, eleven patients were treated by conservative method and only one patient was treated by operation. The results were as follows; l. All give a history of trauma. 2. The major findings in this disease were pain in motion, local tenderness, and limitation of motion. 3. In roentgenographic findings of these cases, we noted the followings: 1) The most common site of the calcification was the proximal area of the tibial collateral ligament. 2) In seven cases (58%), the evidence of calcification was noted in 4 weeks to 12 weeks following original trauma. 3) Eight cases (67%) showed a radiolucent area from 0.5 to 3mm in thickness between the bony shadow and the femur. 4) Eight cases (67%) showed a crescentric shape of calcified area. 5) In seven cases (58%), the size of calcified mass was 1.5 to 3.5cm in length and 1 to 3mm in width. The mean size of calcified mass about 3cm in length and about 2.5mm in width. 4. Eleven cases were treated conservatively and one case was treated operatively. The results were satisfactory, and all patients were able to return to their works.
Clinical Study ; Femur ; Humans ; Knee ; Medial Collateral Ligament, Knee ; Methods