There is Yi Seed self tapping notch Anchor to Ding Zhi Body, with a spiral shell Rod one end shape of The spiral shells Rod is at the tips Cone The spiral shells Rod includes Number Ge threads and an at least self tapping notch, The self tapping notches, which have, connects that Edge one of connects cutting face and a Guide draws face with one, The Guide draw face and draw outer Edge along one Guide of external form formation of The spiral shells Rod, the tooth peak of the outer Trail threads of maximum on The self tapping notches, From The Guide, which draw outer Edge to The and connect the most small of Edge, forms one the oneth away from From away from From, the Long degree As The self tappings notches of The self tapping notches The spiral shells Rod Shaft to upper Long angle valueWherein, 0.1 Y to 0.45 Y of Long degree Fan Wai As, 0.1 X to 0.25 X of depth of threat Fan Wai As of each The threads of Fan Wai As 0.4 X to 0.7 X, The self tapping notches of Trail As X except The spiral shells Rod, spiral shell Pattern Total Long degree the As Y, The the first away from From.一種具有自攻缺口之錨定植體,具有一螺桿,該螺桿之一端形成一錐尖部,該螺桿包含數個螺牙及至少一自攻缺口,該自攻缺口具有以一接緣相接之一切削面及一導引面,該導引面沿該螺桿之外型形成一導引外緣,該自攻缺口上的最大外徑螺牙之牙峰,從該導引外緣至該接緣之最小距離形成一第一距離,該自攻缺口之長度為該自攻缺口在該螺桿之軸向上的長度值;其中,該螺桿之外徑為X,螺紋總長度為Y,該第一距離之範圍為0.4 X至0.7 X,該自攻缺口之長度範圍為0.1 Y至0.45 Y,各該螺牙之牙深範圍為0.1 X至0.25 X。
