Abstract: A retractor for periodontal surgery includes an elongated handle from which extends a first connection portion and a second connection portion, with a blade extending from the second connection portion. The handle and the first connection portion are positioned at a first angle, the first connection portion and the second connection portion are positioned at a second angle. The first and second connection portions are generally co-planar. The blade is obliquely positioned at a third angle relative to the central axis of the second connection portion. The blade may be easily inserted into an incision in a patient's gum so as to retract the incision.

Abstract: A dental implant fixture as a fixture implanted in an alveolar bone to be an artificial tooth root includes a main body vertically extending long along a center axis, at least part of the main body being implanted in the alveolar bone, and a cutting face formed on an outer circumferential surface of the main body to secure a space for accommodating blood when the main body is implanted in the alveolar bone. The dental implant fixture does not apply excessive pressure to a cortical bone of an alveolar bone when being inserted into an implantation hole, and is capable of rapidly regenerating the alveolar bone by accommodating a large amount of blood inside the implantation hole.