Patent ID: 8562347

Claim:
A dental implant, comprising: a dental implant fixture having a fitting hole formed therein at an oral cavity-side end, the fitting hole having an internal thread formed thereon at a side of the fitting hole opposite to the oral cavity; and an abutment having: a fitting portion having an upper/proximal end and a lower/distal end, wherein the upper end is closer to the oral cavity than the lower end, and wherein the lower end is disposed at a first end of the abutment and the lower end fits, without being rotatable, in the fitting hole of the dental implant fixture; a truncated-conical gum piercing portion proximal to the upper end of the fitting portion, which is opposite the lower end of the fitting portion, and has a cross section that increases in area with distance away from the fitting portion; and a columnar portion, which is not circular in cross section, disposed at a second end of the abutment, wherein the first end of the abutment is opposite the second end of the abutment, wherein the lower end of the fitting portion has an internal thread formed therein, which is smaller in inside diameter than the internal thread in the dental implant fixture the two threads being coaxial, and wherein the columnar portion and the gum piercing portion are capable of being ground away to allow an extraction tool to be engaged with the internal thread in the fitting portion of the abutment.