A three unit porcelain fused to metal bridge (PFM) made by a dental technician.A semi-precision attachment between teeth #3 and #4, with the mortise on #4. Note the lingual buttons extending, in the photo, upward on #2 (on the left) and downward on #4. These are used to grasp the crowns with a hemostat and make them easier to handle. They can also be used to aid in removal of the crown in case there is an excessive amount of retention during the try-in. They are cut off prior to final cementation.The proximal surfaces of the pre-solder index abutment and pontic, showing lab-processed grooves for added retention of the acrylic resinThe abutment and pontic joined with acrylic resin in a solder index and reinforced with an old bur (lying horizontally across the occlusal surface of the copings).