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The 1st molar ridges appear to be narrow (Fig.4,5), as compared to that of the 2nd molar (Fig.3 (B: buccal)). Ridge reduction seems to be necessary for the 1st molar sites prior to implant (green area) placement or deeper osteotomy.
Xin Wei, DDS, PhD, MS 1st edition 11/28/2017, last revision 12/01/2017