No abstract available.
Giant Cells ; Granuloma, Giant Cell ; Mandible

No abstract available.

PURPOSE: The aim of this study was to determine the relative radiopacities of cavity lining materials (Resin-modified Glass Ionomer cement, Compomer and Flowable resin) for posterior composite resin restoration. MATERIAL AND METHODS: Resin-modified glass ionomer cement (Fuji II LC, Vitrebond(TM)), Compomers (Dyract , Compoglass, F2000, Dyract(R) flow Compoglass Flow) and Flowable resins (Tetric(R) flow, Aeliteflo(TM) Revolution(TM)) were used. Five specimens of 5mm in diameter and 2mm thick were fabricated with each material. Human molars were horizontally sectioned 2mm thick to include both enamel and dentin. The radiopacities of enamel, dentin, cavity lining materials, aluminum step wedge were obtainded from conventional radiograph and NIH image program. RESULTS: All the tested lining materials showed levels of radiopacity the same as or greater than that of dentin. All compomer tested (Dyract(R), Compoglass, F2000, Dyract(R) flow, Compoglass Flow) and Vitrebond(TM), Tetric(R) flow were more radiopaque than enamel. The radiopacities of Fuji II LC and Revolution(TM) were between enamel and dentin and resin-modified glass ionomer cement, Compomer and Tetric(R) flow were greater than those of Revolution(TM), Aeliteflo(TM) or dentin. The level of radiopacity of the tested materials was variable; those with low radiopacity should be avoided in class II restorations, where a clear determination of recurrent caries by the examining clinician could be compromised. CONCLUSON: Clinician should be able to distinguish these cavity lining materials radiographically from recurrent decay, voids, gaps, or other defects that lead to clinical failure. Utilization of materials ranked more radiopaque than enamel would enable clinicians to distinguish the lining material from tooth structure.
Aluminum ; Compomers ; Dental Enamel ; Dentin ; Glass Ionomer Cements ; Humans ; Molar ; Tooth

Scleredema is a rare scleradematosis of unknown cause involving the face, neck, upper portion of the trunk, and proximal upper extremities. The clinical features of the disease are nonpitting indurated edema or stiffness of the neck, which may be sudden or insidious in onset. Diabetes mellitus and its complications have been frequently described to be associated with this disease. We present a case of scleredema developed on the nape, upper portion of the back and shoulder in 60-year-old man who had been suffered from diabetes mellitus for the past ten years.
Diabetes Mellitus ; Edema ; Humans ; Middle Aged ; Neck ; Scleredema Adultorum* ; Shoulder ; Upper Extremity

PURPOSE: This study was to evaluate the effects of Aloe, Gelfoam, and Plaster of Paris on bone healing. MATERIALS AND METHODS: Four experimental defects were created for placement of the three materials in the right femur of dogs. One defect served as an empty control site. The evaluation was performed at 1-, 6-, and 12-weeks by light microscopy and NIH image program. RESULTS: Radiographic and Histologic examinations showed new bone formation in the presence of Aloe, Gelfoam, and Plaster of Paris and similar bone healing reactions. CONCLUSION: On the basis of these findings, it was concluded that Aloe, Gelfoam, and Plaster of Paris may be adequate agents for use in bone procurement.
Aloe* ; Animals ; Calcium Sulfate ; Dogs ; Femur ; Gelatin Sponge, Absorbable* ; Microscopy ; Osteogenesis*

The purpose of this study was to aid in the prediction of tumor cell tolerance to radiotherapy and/or chomotherapy . For this study, cell surviving curves were obtained for mouse lymphoma YAC-1 cell line using semiautomated MTT assay. 2, 4, 6, 8, 10Gy were irradiated at a dose rate of 210cGy/min using 60Co Irradiator ALDORADO 8. After irra diation, YAC-1 cell lines(3X10(4) cells/ml) were exposed to bleomycin or cisplatin for 1 hour. The viable cells were determined for each radiation dose and/or each concentration of drug at the 4th day. And they w ere compared to control values. The obtained results were as follows: 1. The surviving curve with gentle slope was obtained after irradiation of 2, 4, 6, 8, 10Gy on YAC-1 cell line. 2. The cytotoxicity of bleomycin or cisplatin was increased significantly at all concentration of 0.2microgram/ml, microgram/ml an d 20microgram/ml on YAC-1 cell line (P<0.01). 3. There were no significant differences of surviving fractions among 4Gy, 6Gy, and 8Gy after irradiation of each radia tion dose with 2microgram/ml of bleomycin compared with irradiation only on YAC-1 cell line(P<0.05). 5. There were significant differences of surviving fractions between the groups of irradiation only and the groups of i rradiation with 2microgram/ml of bleomycin or cisplatin at all doses of 2, 4, 6, 8 and 10Gy on YAC-1 cell line(P<0.05).
Animals ; Bleomycin ; Cell Line* ; Cisplatin ; Lymphoma ; Mice ; Radiation Tolerance* ; Radiotherapy

PURPOSE: To compare radiographic images of Digora system and Ektaspeed Plus film obtained from normal adults. MATERIALS AND METHODS: Storage phosphor plate(SPP) was placed in a film holder behind Ektaspeed Plus film package without lead foil. The effect of film on SPP was studied in a separate in vitro experiment. Forty-seven sets of images were prepared for the evaluaton. The regions of interest(ROI) for evaluation were designated at seven sites including normal anatomical structures. The image quality for each ROI was evaluated on enhanced and unenhanced storage phosphor(SP) images and Ektaspeed Plus film. RESULTS: Two film-SPP configurations showed significantly different grey levels at each step of the aluminum step wedge(p<0.05). The contrasts were comparable. Enhanced SP images were significantly superior to unenhaned images and film in all anatomical sturctures(p<0.01). The differences between unenhanced SP images and film were significant(p<0.05) except root canal and cortical bone on alveolar crest. For anatomical items, there were statistically significant difference among five observers(p<0.05). CONCLUSIONS: The image quality of enhanced SP images were superior to Ektaspeed Plus film, and Digora system is potentially applicable to clinical diagnosis.
Adult ; Aluminum ; Dental Pulp Cavity ; Diagnosis ; Humans ; Radiography, Dental, Digital

Purpose: To measure the absorbed doses of cone beam computed tomography (CBCT), which is recently being more frequently used, and to compare them with those of panoramic radiography. Materials and Methods: To measure the absorbed doses of CBCT (PSR-9000N(TM), Asahi Roentgen Ind. Co., Japan), we placed TLD chips on the skin regions above the parotid and thyroid glands, and on the dorsum of tongue in a dental head phantom. We used two image acquisition modes of the Dental and Panoramic modes of CBCT, which differed in the field of view. Also, panoramic radiographs (Auto IIIN, Asahi Roentgen Ind. Co., Japan) were taken to compare with the absorbed doses of CBCT. Result: In the Dental mode of CBCT, the absorbed doses of the parotid gland, dorsum of tongue, and thyroid gland were 3.53, 3.13, and 0.36 mGy, respectively. In the Panoramic mode of CBCT, they were 9.57, 9.15, and 0.85 mGy, respectively. The panoramic mode showed higher absorbed doses than those of the Dental mode. In the panoramic radiography, the absorbed doses of the parotid gland, dorsum of tongue, and thyroid gland were 1.21, 1.19, and 0.16 mGy, respectively. And they were about 1/3 of the Dental mode and 1/9 of the Panoramic mode of CBCT. Conclusion: Absorbed doses of CBCT are higher than those of panoramic radiography, and dependent upon the field of view.
Cone-Beam Computed Tomography* ; Head ; Parotid Gland ; Radiation Dosage ; Radiography, Panoramic ; Skin ; Thyroid Gland ; Tongue

Purpose: To measure the absorbed doses of cone beam computed tomography (CBCT), which is recently being more frequently used, and to compare them with those of panoramic radiography. Materials and Methods: To measure the absorbed doses of CBCT (PSR-9000N(TM), Asahi Roentgen Ind. Co., Japan), we placed TLD chips on the skin regions above the parotid and thyroid glands, and on the dorsum of tongue in a dental head phantom. We used two image acquisition modes of the Dental and Panoramic modes of CBCT, which differed in the field of view. Also, panoramic radiographs (Auto IIIN, Asahi Roentgen Ind. Co., Japan) were taken to compare with the absorbed doses of CBCT. Result: In the Dental mode of CBCT, the absorbed doses of the parotid gland, dorsum of tongue, and thyroid gland were 3.53, 3.13, and 0.36 mGy, respectively. In the Panoramic mode of CBCT, they were 9.57, 9.15, and 0.85 mGy, respectively. The panoramic mode showed higher absorbed doses than those of the Dental mode. In the panoramic radiography, the absorbed doses of the parotid gland, dorsum of tongue, and thyroid gland were 1.21, 1.19, and 0.16 mGy, respectively. And they were about 1/3 of the Dental mode and 1/9 of the Panoramic mode of CBCT. Conclusion: Absorbed doses of CBCT are higher than those of panoramic radiography, and dependent upon the field of view.
Cone-Beam Computed Tomography* ; Head ; Parotid Gland ; Radiation Dosage ; Radiography, Panoramic ; Skin ; Thyroid Gland ; Tongue

BACKGROUND: Acute normovolemic hemodilution (ANH) is known as the easieat and most economical and the quality of autologous blood saved by it is the best of all methods of autotransfusion. To investigate the efficacy of ANH, we studied whether it could reduce the transfusion requirement in spinal surgery. METHODS: Forty patients were randomly divided into 2 groups. In the hemodilution group (n=20), 2 or 3 units of autologous blood were procured immediately before or after anesthetic induction while Ringer's lactate and pentastarch were infused to maintain normovolemia. All patients received deliberate hypotension induced by labetalol. Perioperative changes of hemoglobin, hematocrit and platelets, the transfusion requirement and the amount of postoperative drainage were compared between each group. RESULTS: Perioperative changes of hemoglobin, hematocrit and platelet showed no significant differences between each group. Less packed RBC were used in the hemodilution group (1.9 2.0 units) than in control group (5.9 6.8 units) (p<0.05). In the control group, 4 patients were transfused with fresh frozen plasma (mean 4.8 units), 3 patients with platelets (mean 13 units) and 1 patient with cryoprecipitate (10 units) while only one patient was transfused with 3 units of fresh frozen plasma in the hemodilution group. Postoperative drainage was significantly less in the hemodilution group (1,494 488 ml) than in the control group (2,476 1,730 ml). CONCLUSION: ANH seems to decrease the transfusion requirement in spinal surgery. Reduction of postoperative wound drainage appears to play an important role in that.
Blood Platelets ; Blood Transfusion, Autologous ; Drainage ; Hematocrit ; Hemodilution* ; Humans ; Hydroxyethyl Starch Derivatives ; Hypotension ; Labetalol ; Lactic Acid ; Plasma ; Wounds and Injuries