Abstract: Objective:?To study the anatomical characteristics of bone at the edentulous maxillary molar sites in order to provide the basis of the palatal sinus elevation and the implantation with palatal angulation. Methods:?In this study, CBCT data of 500 patients with maxillary molar loss were collected. The minimum thickness of the palatal bone plate, the length of the bone plate applicable for the palatal sinus elevation, the minimum and maximum angle and the length of the bone plate applicable for the implantation with palatal angulation at the edentulous maxillary molar sites were measured and statistically analyzed. Results:?There is no statistically significant difference between the ratio of applicable cases of the palatal sinus elevation in the maxillary first molar region and in the maxillary second molar region (P>0.05). The ratio of applicable cases of the implantation with palatal angulation is 42.13% and 46.19% at the left and right upper first molar missing site respectively along with 29.91% and 33.59% at the left and right upper second molar missing site (P<0.05). The ratio of applicable cases of the implantation with palatal angulation is 42.13% and 46.19% at the left and right upper first molar missing site respectively along with 29.91% and 33.59% at the left and right upper second molar missing site. The implantation angle is （23.7±10.66）°to （32.98±10.20）°at the right maxillary first molar missing site,（23.95±10.48）°to （33.23±11.97）°at the right maxillary second molar missing site,（17.82±10.39）°to （34.36±11.04）°at the left maxillary first molar missing site and（17.87±9.88）°to（35.59±10.81）°at the left maxillary second molar missing site. The ratio of implantation with palatal angulation and the minimum implantation angle between the first molar and the second molar were statistically different (P<0.05). No difference was observed on the left and right sides of the same dental position (P>0.05). Conclusions:?Through CBCT imaging measurements and analyses, as for patients with maxillary molars missing, some can choose the implantations with palatal angulation and some who need lateral sinus elevations can choose the palatal approach sinus elevations to fulfill implant restorations.