This study investigated the effect of thickness of flowable resin lining on marginal leakage in class II composite restorations. 80 experimental teeth were prepared with class II preparations with enamel margin or dentin margin. Each group was devided into four groups according to flowable resin lining thickness ; Control group - no flowable resin lining, Group 1 - 0.5 mm flowable resin lining, Group 2 - 1 mm flowable resin lining, Group 3 - 2 mm flowable resin lining. The cavities were restored using Scotchbond Multi-Purpose adhesive system, Filtek Flow and Filtek Z 250 composite resin. Following one day storage in distilled water, the restored teeth were thermocycled for 500 cycles and immersed in 2% methylene blue for 24 hours. The results of this study were as follows: 1. Ranking of mean microleakage scores at the enamel margins was Group 1 < Control = Group 2 < Group 3. The microleakage of Group 3 was significantly higher than that of Control, Group 1 and Group 2 (p < 0.05). 2. Ranking of mean microleakage scores at the dentin margins was Group 1 < Group 2 < Control < Group 3. The microleakage of Group 3 was significantly higher than that of Control, Group 1 (p < 0.05). 3. Compared with microleakage between the enamel and dentin margins, enamel margin group were significantly lower than dentin margin group.
Adhesives ; Dental Enamel ; Dentin ; Methylene Blue ; Tooth ; Water

PURPOSE: Ileostomy may affect various aspects of life style of the patient. Moreover the complication after ileostomy formation or closure may lower the life quality of the patient. The purpose of this study is to investigate ileostomy related complications and elucidate associated factors. METHODS: We recruited 103 patients who underwent ileostomy in Asan Medical Center between July 1989 and June 2000. All ileostomies are constructed through the rectus muscle at the right lower quadrant of the abdomen. To mnimize peristomal skin irritation, at least two to three centimeters of the ileum lies above the skin level. We analyzed complications after ileostomy formation in relation to underlying diseases, types and purpose of ileostomy. Also, we analyzed complication after ileostomy closure in relation to underlying diseases, time interval and method of take-down. Results are compared using chi-square test. Statistical significance was assigned to a P value of<0.05. RESULTS: Complications of ileostomy formation were developed in 17 (16.5%) cases; 8 peristomal dermatitis, 3 wound infection, 2 prolapse, 1 stenosis, 1 perforation, 1 bleeding, 1 high output ileostomy. There was no significant difference of complication rate in relation to underlying diseases, types and purpose of ileostomy. Ileostomy take-down was performed in 55 (53.4%) cases of 103 patients. Complications related with ileostomy take-down were developed in 18 (32.7%) cases; 7 wound infection, 5 intestinal obstruction, 2 incisional hernia, 2 enterocutaneous fistula, 1 anastomosis leakage, 1 bleeding. There was no significant difference of complication rate in relation to time interval or method of take-down. However, complication rate of ileostomy take-down was significantly increased in patient with inflammatory bowel disease. CONCLUSIONS: Ileostomy formation is simple and safe surgical procedure. We couldn't find any factor affecting the morbidity of ileostomy formation or closure. However, complication rate after ileostomy closure, especially in patient with inflammatory bowel disease, is relatively high.
Abdomen ; Chungcheongnam-do ; Constriction, Pathologic ; Dermatitis ; Hemorrhage ; Hernia ; Humans ; Ileostomy* ; Ileum ; Inflammatory Bowel Diseases ; Intestinal Fistula ; Intestinal Obstruction ; Life Style ; Prolapse ; Quality of Life ; Skin ; Wound Infection