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

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

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.
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

No abstract available.
Follow-Up Studies* ; Hydronephrosis*

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

STATEMENT OF PROBLEM: Restoring and replacing teeth with fixed prostheses commonly used in dental practice. Because of improper oral hygiene care and inaccurate laboratory procedure, complications of fixed prostheses were found in the mouth of patients. Although many efforts have been continually made to obtain the data of long term prognosis of fixed prostheses, it was difficult to do it. PURPOSE: The purpose of this study was to evaluate the clinical status of fixed prostheses. MATERIAL AND METHODS: In order to assess the clinical status of fixed prostheses, a total of 161 individuals (aged 17-85, 99 women and 62 men with 1596 unit of fixed prostheses, and 1169 abutments) who first visited the Department of Prosthodontics, Pusan National University Hospital, between April to September, in 2007 were examined. RESULTS AND CONCLUSION: The results of this study were as follows: 1. Length of service of fixed prostheses was 8.6+/-0.6 years (mean), 10.0 years (median). 2. Location of fixed prostheses was found to have no statistically significant influence on longevity of fixed prostheses (P > .05). But, the success rate was high in posterior region and in mandible where the failure rate was high in combination (P < .05). 3. Longevity of fixed prostheses made of metal was longest (mean: 13.0+/-9.3, median: 14.0), gold, precious ceramic, non-precious ceramic trailing behind (P < .05). 4. Number of units in fixed prostheses was found to have no statistically significant influence on longevity of fixed prostheses (P > .05). But, the success rate was high in Single-unit and the failure rate was high in over 3-unit (P < .05). 5. Condition of opposing dentition was found to have no statistically significant influence on longevity of fixed prostheses (P > .05). But, the success rate was high in natural dentition (P < .05). 6. Defective margin (28.2%), dental caries (23.0%), periodontal disease (19.3%), periapical disease (16.9%) were frequent complications. In 30.1% of the cases, abutment state after removing fixed prostheses was needed to be extracted.
Ceramics ; Dental Caries ; Dentition ; Female ; Humans ; Longevity ; Male ; Mandible ; Mouth ; Oral Hygiene ; Periapical Diseases ; Periodontal Diseases ; Prognosis ; Prostheses and Implants ; Prosthodontics ; Tooth

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