The purpose of this study was to evaluate histopathological inflammation process after RCT in infected teeth of cats following the systemic injection of Penicillin G Procaine. A comparison was made on two groups of with and without drug application. A total of 30 mature, healthy cats were used in this study. One maxillary canine was left intact as control while the othe three canines were used as experimental cases.After intentional overinstrumentation, teeth were exposed to oral cavity for two weeks which then were sealed with glass ionomer and reviewed after 6 weeks. Periapical lesions were clearly seen in radiographs of all teeth. From the total, 9 Cats died and 3 were kept as positive control leaving 18 cats which were put into Three groups. Group I:6 cats were subjected to one visit RCT. Group II: recieved Penicillin G Procaine (IM) 12 hours before RCT. Group III: 6 cats had penicillin G procaine (IM) immediately after RCT. Injections were repeated every 12 hours until the animals were subject to vital perfusion. After RCT, each cat was subjected to vital perfusion at 3,24,48 hour intervals. In positive control cases, periapical lesions were induced followed by vital perfusion without RCT and / or drug application. Canine teeth with periodontium, periapical lesion and some of the normal bone, were separated from the jaw in the form of block section after the sacrification of animals. Decatcification process was performed on each sample. The rate and the type of inflammation and fibroblast prolifration were assessed to find out the differences.Results showed a higher prevalance of chronic inflammation 3 hours after RCT. while this was not the case 24 and 48 hours after RCT. The rate of inflammation and fibroblast prolifration showed no significant difference between the three groups in 3,24,48 hours following RCT.

Iran-Iraq war began in 1980 in a widespread front, located mostly in a warm climate (especially in summer). Both the people living there and the troops fighting during the war, had heat stroke morbidities due to excessive sunlight exposure. In a cross-sectional descriptive study, during 8 years period of war (1980-1987), among a total number of 184627 troops, 9477 cases had heat related complaints. The heat related problems were classified in 3 categories; namely heat fatigue (44.02%), heat exhaustion (49.47%) and heat stroke (6.49%). The first category of the disease was the least problematic entity, which was relieved by cold drink and resting at cool location. The second category was associated with water and electrolyte loss, which needed i.v. fluid therapy. The third group was relieved only by inhalational methods, cold blankets and gross i.v. therapy. The results suggest a relatively high incidence of heat related morbidities which need more medical attention and also more sophisticated studies to assess suitable therapeutic modalities.      

Tubal ligation is one of the most effective and reliable methods of contraception and of successful program of birth control in Iran. Present study was done to evaluate factors affecting risk, of complications during tubal ligation surgery. We studied 1780 women that had tubal ligation in 13 hospitals of Tehran during the years 1993-1995. Data on, operation were collected by questionnaire and analysed using logistic regression method. Risk of complications was increased in women had had operation after vaginal delivery, in luteal phase, after cesarean, section and in follicular phase, respectively. Modified Pomery, Pomery and Parkland methods of operation were ascendingly related to increased risk of complications. Age, history of pelvic pain method of anesthesia, incision size and time of operation were not significantly correlated with complications. Frequency of complications was higher in women that had other procedures during surgery. We suggest that tubal ligation be done after vaginal delivery and by modified Pomery method.