The above study " A Comparative Evaluation of Different Gingival Retraction Methods – A Double Blinded In Vivo Study " is going to compare three different methods of gingival retraction using three different gingival retraction materials and their potential in gingival retraction when used in single unit fixed partial denture cases. It is going to be held over a period of 3 months. The study will be carried out on patients requiring two separate single unit fixed partial dentures attending the Out Patient Department of Prosthodontics and Crown & Bridge in Sardar Patel Post Graduate Institute of Dental and Medical Sciences. A written informed consent will be obtained from each patient after explaining the nature and outcome of procedure and the possible consequences and complications.

 Gingival retraction reversibly displaces the gingival tissues so that bulk of low viscosity impression material can be introduced in the widened sulcus and the margins can be captured. Gingival tissues are displaced both laterally and vertically. Lateral retraction displaces the tissues and provides adequate bulk of impression material so that it can be removed from the mouth intact with no tearing. Vertical retraction exposes the undercut portion of the tooth apical to the finish line.

The present study is therefore undertaken to identify the most efficient gingival retraction method out of Retraction Cord with Epinephrine, Retraction paste (3M) and Retraction Gel (Smart Retract) by measuring sulcus width and depth.

A control group of plain Retraction cord will be used in one single unit FPD and the retraction method to be compared will be used in another single unit FPD in the same patient, and the two groups will be compared.