No abstract available.
Aneurysm* ; Heart Septal Defects, Ventricular*

Chondroblastoma is a rare primary bone tumor which originates from cartilage, and represents approximate 1% af all bone tumor. The chondroblastoma arises most frequently from the epiphysis of the long bones with the humerus being the commonest site. It afflicts usually the young under 25 years with greater incidence in male. As there is no cartilage cell on craniofacial bone which is mainly fromed by intramembranous ossification, the chondroblastoma on the craniofacial bone is extremely rare. But the chondroblastoma recurred frequently in craniofacial bone when the mass is excised incompletely or curretted and, as the tumor has the outstanding ability of local invasiveness, it destructs the adjacent bone. In addition, it is difficult to diagnose differentially from sarcoma or giant cell tumor histopathologically. Due to the entities described above, it is necessary to remove the entire tumor mass as complete as possible, to treat with radiation pre or postoperatively for preventing from recurrence, and to observe for a long time. The chondroblastoma on temporal bone is rare and is difficult to diagnose and treat successfully. So we'd like to present a case of chondroblastoma which was originated from temporal side of TMJ with literatural review.
Cartilage ; Chondroblastoma ; Epiphyses ; Giant Cell Tumors ; Humans ; Humerus ; Incidence ; Male ; Recurrence ; Sarcoma ; Temporal Bone ; Temporomandibular Joint*

No abstract available.
Anti-Bacterial Agents* ; Dysentery, Bacillary*

No abstract available.
Heart Diseases* ; Heart* ; Spleen*

STATEMENT OF PROBLEM: Within the elastic limit of the screw, the greater the preload, the tighter and more secure the screw joint. However, additional tensile forces can incur plastic deformation of the abutment screw when functional loads are superimposed on preload stresses, and they can elicit the loosening or fracture of the abutment screw. Therefore, it is necessary to find the optimum preload that will maximize fatigue life and simultaneously offer a reasonable degree of protection against loosening. Another critical factor in addition to the applied torque which can affect the amount of preload is the joint connection type between implant and abutment. PURPOSE: The purpose of this study was to evaluate the influence of tightening torque on the implant-abutment screw joint stability. MATERIAL AND METHODS: Respectively, three different amount of tightening torque (20, 30, and 40 Ncm) were applied to implant systems with three different joint connections, one external butt joint and two internal cones. The initial removal torque value and the postload (cyclic loading up to 100,000 cycles) removal torque value of the abutment screw were measured with digital torque gauge. Then rate of the initial and the postload removal torque loss were calculated for the comparison of the effect of tightening torques and joint connection types between implant and abutment on the joint stability. Results and CONCLUSION: 1. Increase in tightening torque value resulted in significant increase in initial and postload removal torque value in all implant systems (P < .05). 2. Initial removal torque loss rates in SS II system were not significantly different when three different tightening torque values were applied (P > .05), however GS II and US II systems exhibited significantly lower loss rates with 40 Ncm torque value than with 20 Ncm (P < .05). 3. In all implant systems, postload removal torque loss rates were lowest when the torque value of 30 Ncm was applied (P < .05). 4. Postload removal torque loss rates tended to increase in order of SS II, GS II and US II system. 5. There was no correlation between initial removal torque value and postload removal torque loss rate (P > .05).
Fatigue ; Joints ; Plastics ; Torque

A non-familial type nephrotic syndrome associated with distal renal tubual acidosis, nephrocalcinosis and renal osteodystropy is a very rare disease. A 4 year old boy was treated with prednisone under the impression of minimal lesion nephrotid syndrome but the response was not excellent along with persistant microhematuria in his serial urinalysis. Percutaneous renal biopsy speciman revealed microcalcification around afferent arteriols and peritubular area along with mild mesangial cell proliferations. Futher studies disclosed osteodystrophic change of the femurs. Patient had a typical forms of distal type renal tubular acidosis which was confirmed by NH4Cl and NaHCO3 loading tests. This case is the first cases of non-familial type nephrotic syndrome associated with nephrocalcinosis, renal osteodystrophy and distal RTA in Korea.
Acidosis* ; Acidosis, Renal Tubular ; Biopsy ; Child, Preschool ; Femur ; Humans ; Korea ; Male ; Mesangial Cells ; Nephrocalcinosis* ; Nephrotic Syndrome* ; Prednisone ; Rare Diseases ; Renal Osteodystrophy* ; Urinalysis

No abstract available.
Hemorrhage* ; Humans ; Infant* ; Infant, Very Low Birth Weight*

No abstract available.
Heart Atria*

PURPOSE: The purpose of this study was to investigate the effect of size and shape of retention element on the bond strength of indirect composite resin and metal. MATERIAL AND METHOD: The metal disk specimens, each 6mm in diameter, were cast from Cr-Co alloy. They were divided into 8 groups by applied retention element: retention bead group B2 (phi 0.2mm), B4 (phi 0.4mm), B6 (phi 0.6mm), B8 (phi 0.8mm), retention crystal group C2 (0.2mm), C5 (0.5mm), C8 (0.8mm), and sandblasting group SB (110micrometer Al2O3 blasting) as control. Eighty-eight metal specimens were veneered with TESCERA(R) Indirect resin system. One specimen of each group was sectioned and the resin-metal bonding pattern at the interface was observed under measuring microscope. Other specimens were then tested for tensile bond strength on an Instron universal testing machine at a crosshead speed of 2mm/min. RESULTS: 1. Compared to sandblasting, beads or crystals increased the resin-metal bond strength (P<.05). 2. 0.2mm retention crystals were most effective in improving the resin-metal bond strength (P<.05). 3. 0.2mm beads showed the highest bond strength among retention bead groups, but there was no statistically significant difference (P>.05). 4. Retention crystals tend to be higher in bond strength than retention beads due to wider surface area. 5. The larger retention element, the larger the undercut for the mechanical retention, but the gap at resin-metal interface was also increased. CONCLUSION: Within the limitations of this study, 0.2mm retention crystals were most effective in improving the resin-metal bond strength.
Alloys

No abstract available.
Angioplasty* ; Child* ; Humans ; Takayasu Arteritis*