The purpose of this study was to evaluate the effect of dentin pretreatment with Dentin Conditioner,Ultra-Etch,conditioner of Fuji Plus cement on the shear bond strength of resin-reinforced glass ionomer cements to dentin and analyze the fractured surfaces. To evaluate the bond strengh, the extracted human teeth which had uniform area of exposed dentin were cemented with conventional glass ionomer cement. 3M RelyX TM Luting (Vitremer luting cement). Fuji Plus cement after dentin pretreatment. The shear bond strengh was measured using the Universal testing machine(Instron Co., USA) with a crosshead speed of 1mm/m. The effect of dentin pretreatment was evaluated by observing pretreated dentin surfaces under the scanning electron microscope,measuring the shear bond strength and observing the fractured surfaces under the scanning electron microscope. The results were as follows: On the SEM observation of surface morphology, the specimens treated with Dentin Conditioner, Ultra-Etch and conditioner of Fuji Plus cement were removed the smear layer and funneled dentinal tubules in dentin surfaces. In RelyX TM Luting cement group, shear bond strengh of pretreated group was significantly higher than control group. In Fuji Plus cement group and Fuji I group, regardless of the type of pretreatment agents, there was tendency of increase in the shear bond strength. On the SEM observation of fractured surfaces, as the shear bond strength increase, it were shown thicker cement layers and were not shown dentinal tubules. According to these results, it were shown that dentin pretreatment have much effect on bonding states.
Dentin* ; Glass Ionomer Cements* ; Glass* ; Humans ; Smear Layer ; Tooth

No abstract available.
Child* ; Humans

According to repeated measurements and correction procedures, the accuracy of the phase-shifting profilometry was developed. At first, after 20 final models for maxillary complete denture were duplicated, the mucosa surfaces of models were measured with the phase-shifting profilometry and each mirror view of these was calibrated. Maxillary cats were divided into 4 groups of 5 casts per each, and wax dentures with 2 sheets of baseplate wax and artificial teeth were made and then cured according to the curing method of each group. Group I ; quick curing with QC-20 acrylic resin Group II ; 9 hour curing with QC-20 acrylic resin Group III ; SR-Ivocap system Group IV ; metal base and quick curing with QC-20 acrylic resin After curing, polishing, and storing at 37degrees C n saline for 30 days, the forms of the impression surface of the dentures were measured with the phase-shifting profilometry. Then, the impression surface form of each denture was placed in the optimal position of comparison with the mirror view of the same final cast. The amount and direction of distortion of each denture was analyzed and the effects of polishing and storage in each denture were compared. The obtained results were as follows : 1. In Group I, the denture was observed as the appearance distorted in the opposite direction of the mucosa and the postero-lateral part of palatal portion of the denture was observed as the appearance separated from the mucosa. Also, the buccal flanges of the denture were observed as the appearance distorted in the direction of the mucosa. 2. In Group II, the postero-lateral part of palatal portion of the denture was observed as the appearance separated slightly from the mucosa. The bilateral buccal flanges of denture were observed as the appearance distorted severely in the direction of the mucosa. 3. In Group III, the bilateral part of the residual ridge crest portions and the buccal flanges of the denture were observed as the appearance distorted in the direction of the mucosa, and specially, the buccal flanges of the maxillary tuberosities were distorted severely. 4. In Group IV, the acrylic resin base of the buccal portion of the denture was observed as the appearance distorted in the opposite direction of the mucosa. 5. The phase-shifting profilometry, done with repeated measurements and correction procedures, was effective in comparing the amount and direction of distortion at every position after the laboratory work and the delivery of maxillary complete denture.
Animals ; Cats ; Denture, Complete ; Dentures* ; Mucous Membrane ; Tooth, Artificial

Legg-Perthes' disease, as avascularity of the femoral head that often arises in the child of a particular age group, is a serious disease of which the frequency is more than the osteochondroses of the other part, and the cause of Legg-Perthes disease is obscure up to now, but the pathogenesis and, pathology are more clearly understood. Twenty patients with Legg-Perthes disease were managed at the department of Orthopaedic Surgery of Hanyang University hospital from May, 1972 till September, 1977 and were studied according to the method of Catterals classification arid arthrogram. The following conclusion were made. 1. The age group with the highest frequency was that from 6 to 9 years (40%) and the ratio of male: female was 6: 1. 2. The stage of disease s progress when patient went to hospital was almost fragmentation stage as 17 persons of the whole. 3. By arthrogram Spherical form of femoral head was 15%; Round form 45%; Flatten form 40%. 4. The longer the period from onset to beginning of treament was the more femoral head flattened. 5. There was the most number of patient as 13 persons of the whole wearing abduction internal rotation brace. 6. From the view point of arthrogram the more spherical the femoral head was the better the prognosis was; otherwise the worse.
Arthrography ; Braces ; Child ; Classification ; Disease ; Female ; Head ; Humans ; Legg-Calve-Perthes Disease ; Male ; Methods ; Osteochondrosis ; Pathology ; Prognosis

No abstract available.
Animals ; Chitosan* ; Eating* ; Mice*

No abstract available.
Animals ; Chitosan* ; Rats* ; Water*

No abstract available.
Acute Kidney Injury* ; Carbon Monoxide* ; Carbon* ; Rhabdomyolysis*

No abstract available.
Neck*

Myotonic dystrophy is the most common systemic disease causing myotonia. We report the case of respiratory failure in a patient with myotonic dystrophy after laparoscopic cholecystectomy. We carried out neurologic testing, electromyography and DNA testing in this patient and electromyography in the family of the patient. Through electromyography and DNA testing, this patient was diagnosed with myotonic dystrophy type I. Myotonic dystrophy is characterized by gradual decline of muscle tone and myotonia. It is important that this disease be excluded through preoperative history taking, physical examination and family history taking.
Cholecystectomy ; Cholecystectomy, Laparoscopic ; DNA ; Electromyography ; Humans ; Muscles ; Myotonia ; Myotonic Dystrophy ; Physical Examination ; Respiratory Insufficiency

Five cases of ovarian serous borderline tumor associated with multiple peritoneal implants were analysed. The age of 5 patients ranged from 34 to 45(mean: 39) years at the time of diagnosis. Two patients presented with secondary infertility underwent hyperstimulation of the ovary under the in vitro fertilization program. One patient was presented with abdominal pain and the remaining two with lower abdominal mass accompanied by abdominal pain. Serous surface papilloma of borderline malignancy, involving one or both ovaries, was present in all 5 cases and papillary serous cystic tumor of borderline malignancy was associated simultaneously in one or both ovaries in all cases. Marked adhesions between the pelvic organs, and multiple granularities and nodularities of the omentum and peritoneum were noted. Microscopically, the peritoneal lesions were composed of noninvasive implants of tumor cells and pasmmoma bodies on the surface of entire pelvic and abdominal organs. Flow cytometric analysis of nuclear DNA content from paraffin-embedded tissue fo primary ovarian tumor classified as aneuploidy in 3 cases and as diploidy in 2 cases. The DNA index of the aneuploid tumors ranged from 1.21 to 1.37. Four patients underwent hysterectomy, bilateral salpingo-oophorectomy and partial omentectomy in which two were followed by chemotherapy and one case underwent bilateral salpingo-oophorectomy.