[Effects of different doses of LIF on IVM rate and cumulus expansion in mouse oocytes]

The aim of this research was to study the effects of different doses of LIF on GVBD and MII development rate and cumulus expansion. Immature mice superovulated with HMG and GV oocytes obtained from ovary 48 hours later. The GV oocytes were cultured in TCM199 with 100, 500 and 1000 RI /ml LIF. Cumulus expansions were evaluated with two examiners and numbers of MII oocytes were recorded. For denuding the oocytes hyaloronidase was used. Our results showed that the rate of GVBD and MII development increased in -groups with LIF compared with control group. Rate of MII development with 1000 IU/ml LIF was significantly higher than that of control group [P<0.05]. Cumulus expansion in group with 1000 IU/ml LIF improved significantly compared with control group [p<0.05]. Our results showed that LIF could improve IVM rate in dose dependant. Also cumulus expansion improved in group with LIF and increased oocyte quality

[ study on the prevalence of odontogenic sinusitis among the patients with maxillary sinusitis referred to Amir Aalam hospital [1991 -2001] [research]]

The aim of the present study was to investigate the effects of dental factors causing maxillary sinusitis in order to help the dentists to prevent it, to overcome the probable side effects and in some cases to provide and early dental treatment. In this study, which reviewed the records of the patients affected with maxillary sinusitis during the last ten years, the predisposing factors were divided into dental and non-dental origins. The whole records of maxillary sinusitis were estimated as 158, from, among than 29 patients had dental origin [18.35%]. Another finding-of the present study was the predominance of male patients [68-96%] against females. The most cases of odontogenic maxillary sinusitis were in their fourth decade of life. 86.2% of the odontogenic maxillary sinusitis were caused by iatrogenic factors which were attributed mostly to the first maxillary molar. Amir Aalam hospital is Tehran's E.N.T hospital. In this study, conducted in the mentioned hospital, 158 records of patients with maxillary sinusitis were investigated and infections of dental origin were found as the reason of their return. The samples under study consisted of dental in fections, false root canal therapy and odontogenic cysts