There is no bone loss 1 year 8 months post cementation (Fig.9).  In fact the Zirconium onlay of the opposing tooth fractures (*).  The bone density around the most coronal threads increases 2 years 7 months post cementation (Fig.10 *), while the high noble crown of the tooth #31 has been fabricated to prevent future crack (heavy mastication).

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Xin Wei, DDS, PhD, MS 1st edition 05/22/2019, last revision 05/24/2019