A 54-year-old man has multiple restoration (Fig.1). The curve of Spree on the right side is abnormal (arrow with #2 supraocclusal; #3 and 4 infraocclusal).  Bone density at the sites of #30 and 31 appears to be low.  Prepare bone expansion. 

Surgical Stent for Opposing Tooth Reduction

Xin Wei, DDS, PhD, MS 1st edition 12/09/2016, last revision 01/19/2018