suture - specific coatings having a number average molecular weight not exceeding 20 kda , a melting temperature above 37 ° c ., and heat of fusion exceeding 20 j / g , are formed of copolyesters of polycaprolactone or of ε - caprolactone and at least one cyclic monomer forming a segmented polyester chain initiated by a polyaxial crystalline organic compound or an amorphous polyaxial polymeric initiator and include from about 0 . 01 to about 10 weight percent of at least one molecularly dispersed bioactive agent .