Secondair caries was considered as an important contributor to the complain in fixed prosthodontic (crown & bridgework). One factor that is improper cervical margin of the restoration could lead to desementation and further to secondair caries occurance. Tensile stress as leverage at long span brigde could open the cervical margin of the retainer. Metal coping as primary coping could protect the abutment teeth of long span bridge of this possibility. This article reported two cases treated with long span conventional brigde on primary metal coping at its abutment.