No abstract available.
Dementia* ; Epidemiologic Studies*

No abstract available.
Fibronectins* ; Staphylococcus aureus* ; Staphylococcus*

Sixty premolars extracted for orthodontic treatment were divided into four groups, and the residual resin was removed with four different rotary finishing instruments at a fixed speed of 18,500+/-300rpm on the low speed handpiece. The instruments were G1; 169L carbide fissure bur, G2; No.2 round bur, G3; No.4 round bur, G4; No.8 round bur. Then, the enamel received a 5-second polishing with a rubber cup and a pumice. To find the extent of loss on the enamel at this point, prophylaxis was done with the rubber cup and a pumice prior to bonding of the bracket(P1) and removal of residual resin by means of appropriate procedure applicable to each resprctive group(P2) followed. The final polishing was done with the rubber cup and pumice(P3), and the enamel surface roughness was measured each by the surface measuring instrument. The whole process was obesrved under a scanning electron microscope to gain the following results : At P2, the enamel surface roughness in G1 showed most smoothly with 2.60+/-0.55microgram; in G2, 3.24+/-0.80microgram; in G3, 3.44+/-0.94microgram; in G4, 3.89+/-0.54microgram, the rougjest. G2 and G3 showed no statistical significance(P>0.05). At P3, the enamel surface roughness in G1 showed most smoothly with 2.29+/-0.47microgram, in G2, 2.44+/-0.56microgram, in G3, 2.44+/-0.58microgram, in G4, 2.92+/-0.43microgram, the roughwst. G1 vs G2, G3, and G2 vs G3 had no statistical significances(P>0.05). In all groups, P2 and P3 showed rougher in surface roughness than P1, and P2 rougher than P3(P<0.01). In a case of 5-second prophylaxis with the rubber cup and the pumice on a virgin, normal enamel. fine scratches were found under the scanning electron microscope. In all four groups, unremovable gouges remained even agter polishing with the rubber and pumice; residual resin was not observed with naked eye when finished with the rubber and pumice, but the resin debris was observed under the scanning electron microscope.
Bicuspid ; Dental Enamel* ; Rubber

No abstract available.
Child* ; Humans ; Nevus, Spindle Cell*

Meningioma is usually known to occur stuck to the dura mater, but extradural meningioma occurs rarely. Most of the extradural meningiomas are located in the head and neck and we report a case of the primary intraosseous meningioma in the orbit. A 50-year old woman presented with the left eye hyperemia and exophthalmos. Neuroimaging modalities showed hyperostosis at the left sphenoid and orbital wall. On microscopic view, spindle cells and psammoma bodies between the woven bones were observed. The origin of the intraosseous meningioma is explained with various potent possibilities and differential diagnosis thoroughly explored.
Diagnosis, Differential ; Dura Mater ; Exophthalmos ; Female ; Head ; Humans ; Hyperemia ; Hyperostosis ; Meningioma* ; Middle Aged ; Neck ; Neuroimaging ; Orbit

No abstract available.
Abruptio Placentae* ; Female ; Pregnancy

No abstract available.
Abruptio Placentae* ; Female ; Pregnancy

No abstract available.
Lung* ; Neoplasm Metastasis* ; Sarcoma* ; Thorax*

One of the biggest clinical problems of osseointegrated implant prosthesis is the excessive stress caused by bite forces which are transfered directly into the bone through the osseointegrated implant fixtures. So several biodynamic problems occur when there is an excessive fatigue stress. The factors of stress distribution are the number, kind, position, arrangement of the implants, and the distance between the implants, and the kind, quality of superstructure prosthesis and connection type between the rest implant and the superstructure. Recently, a distal short additional implant, socalled rest implant, is employed to reduced the stresses in conventional cantilevered prostheses. This study was undertaken to analyze the stresses transfered by osseointegrated implant cantilevered prostheses depending upon the number and the position of implants, the presence of rest implant, and the type of their connection. Three dimensional finite element analysis was attempted using ANSIS ver. 5.3 program under IBM INDIGO computer. The results were as follows 1. The rest implant influenced on the pattern of stress distribution on the anterior area of the mandible and the superstructure. 2. In the group employing the rest implants, the fixed type of connection between the rest implant and the superstructure was more stable than the ball attachment type on the stress distribution. 3. In the group employing the ball attachment between the rest implant and the superstructure, the case with 4-implants(on canine, premolar) was little more stable than the case with 6-implants and the case with 4-implants (on incisor, premolar) on the stress distribution. 4. In the cantilevered group, the case with 4-implants(on incisor, premolar) and the case with 6-implants were more stable than the case with 4-implants (on canine, premolar) on the stress distribution. 5. In all of the group, the case with 6-implants and the fixed type of connection was the most stable and the case with 4-implants (on canine, premolar) was the most unstable on the stress distribution.
Bite Force ; Fatigue ; Finite Element Analysis* ; Incisor ; Indigo Carmine ; Mandible ; Prostheses and Implants*

PURPOSE: Authors investigated the associated findings and their value in the diagnosis of anterior cruciate ligament(ACL) injury in MR image. MATERIAL AND METHODS: The knee MR images of 47 patients with ACL injury(complete; 24, partial; 23) and 61 patients with normal ACL confirmed by the knee arthroscopy or operation were reviewed retrospectively. The degree of anterior translocation of tibia and the degree of posterior cruciate ligament(PCL) buckling were evaluated. The prevalence and pattern of associated adjacent bone, ligament and meniscus injuries were studied. RESULTS: The means( +/- 2standard errors) of anterior translocation were different significantly in statistical analysis(p<0.001, student t-test) between injury group(7.51 +/- 1.16mm) and normal group(-0.56 +/- 0.92mm). In the level of 5mm of anterior translocation for the criteria of ACL injury, the sensitivity, specificity, accuracy were 78.7%, 89.5%, 84.3% for each. The means of PCL buckling ratio were also different statistically b. etween injury group(0.23 +/- 0.02) and normal group(0.17 +/- 0.01)(p<0.001). In the level of 0.20 for diagnostic criteria of ACL injury, the sensitivity, specificity, accuracy were 71.4%, 83.6%, 78.4% for each. Thirty one medial meniscus tear(66%), thirteen lateral meniscus tear(28%), ten medial collateral ligament injury(28%), one PCL injury (2%) were associated with ACL injury. The twenty nine bone marrow changes were found in twenty patients {43%) which included acutely injured seven patients. In acute cases, the bone marrow changes were depicted as diffuse or focal high signal intensity lesions in lateral femoral or tibial condyles in contrast to the changes in chronic cases depicted as focal low signal intensity lesions in variable location. Lateral femoral condylar notch depression were found in nine patients(19%) and avulsion fractures of anterior tibial spine in four patients(9%). CONCLUSION: The associated findings with ACL injury (anterior translocation, buckling of PCL, associated bone, ligament and meniscus injuries) are considered to be helpful in the diagnosis of ACL injury on Knee MR images, when the findings of anterior cruciate ligament itself are not confirmative.
Anterior Cruciate Ligament* ; Arthroscopy ; Bone Marrow ; Collateral Ligaments ; Depression ; Diagnosis ; Humans ; Knee ; Ligaments ; Magnetic Resonance Imaging* ; Menisci, Tibial ; Prevalence ; Retrospective Studies ; Sensitivity and Specificity ; Spine ; Tibia