tachment level was changed from $8.67{pm}1.72mm$ to $7.00{pm}1.60mm$ (control); from $8.93{pm}2.23mm$ to $6.00{pm}1.92mm$ (test); and bone probing depth was decreased from $10.20{pm}1.90mm$ to $9.07{pm}1.95mm$ (control); from $10.14{pm}2.14mm$ to $7.43{pm}2.06mm$ (test). This study indicates that treatment of periodontal intrabony defects with EMD is clinically superior to treatment without EMD (OFD alone) in every parameter evaluated. Within the limits of this study, the application of EMD in intrabony defects resulted in clinically significant gain of clinical attachment level and decrease of bone probing depth. And further controlled clinical studies are required to confirm the effectiveness of the EMD in the treatment of various osseous defects.