VENTRAL HERNİ ONARIMINDA POLİPROPİLEN VE SİLİKON KAPLI POLİPROPİLEN YAMANIN RAT MODELİNDE KARŞILAŞTIRILMASI Comparison of Polypropylene and Silicone-Coated Polypropylene Mesh in Repair of Ventral Hernia in a Rat Model