Dental Implants: 3-Unit Fixed Denture

Authors

Dr. Croll asks us:

I just inherited a patient with a 3-unit fixed partial denture on 3 well integrated dental implants #19, 20, 21 positions.

All of the porcelain has shattered off #21. The FPD is intact and the porcelain is intact on #19, 20. It is cement retained. I am planning on doing an overcoping to replace the porcelain on #21. How much space do I need for an overcoping with metal framework and porcelain surface? Any recommendations for luting medium? I am planning on using a base metal alloy for increased strength and ridigity and a high fusing porcelain. Any recommendations on any aspect of my intended treatment plan?