# US 5,350,300 A · Dental implant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,300 A - Document ID: US5350300A - Status: Granted - Kind: A - Application number: 07/675,915 - Filed: 1991-05-01 - Granted: 1994-09-27 - Earliest claimed: 1989-11-08 - Inventors: Jacques Gallais - Web page: https://patentgrep.com/patent/US5350300A ## CPC - A61C 8/003: {Transmandibular implants} - A61C 8/0089: {Implanting tools or instruments} - A61F 2002/2889: {Maxillary, premaxillary or molar implants} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract The invention concerns in combination a dental implant with complete tooling system and the method of installation of the implant in the maxillary of a human being. The implant is divided into two parts namely "the body" and the head. The profile of the body is composed by the combination of conical portions (3) and (5) together with the cylindrical portions (2), (4), (6) and (7). The body is provided with a threaded end (8), which is splitted in the form of two legs (10) and (12); wherein the threaded end (8) is designed to receive the head (9) which can be screwed on the body of the implant. To prevent unscrewing of the head (9), the two legs (10) and (12) are bent into the slots (14) and (16) provided in the head (9). The other end of the body of the implant is provided either with a threaded pin (1) or a threaded hole to receive a dental prosthetic appliance afterwards. ## Claims ### Claim 1 A dental implant for installation in the maxillary comprised of a body and a head, said body is provided with a threaded end for attaching a dental prosthesis, said threaded end is connected to a first cylindrical portion which is connected to a first truncated conical portion, which in turn is connected to a second cylindrical portion having a diameter smaller than the smallest diameter of said truncated conical portion, said second cylindrical portion is further connected to a second truncated conical portion having the same conicity as said first truncated conical portion and said first and second truncated conical portions being coaxially disposed such that their conical surfaces will mate with the internal surface of a prepared maxillary cavity, said second truncated conical portion is further connected to a third cylindrical portion which has a diameter smaller than the smallest diameter of second truncated conical portion, said third cylindrical portion is further connected to a fourth cylindrical portion coaxial with said first and second truncated conical portions, said fourth cylindrical portion having a base at the side connected to said third cylindrical portion and having a diameter equal to the diameter of the conical projection, onto said base of the fourth cylindrical portion, of a cone defined by the first and second truncated conical portions, said fourth cylindrical portion is further connected to a third conical portion having an inclination of thirty degrees which in turn is connected to a fifth cylindrical portion, said fifth cylindrical portion is provided with threads for receiving said head, said fifth cylindrical portion having a split portion forming two legs which can be bent into slots formed on said head, whereby said head is prevented from rotation to lock the head against unthreading. ### Claim 2 (depends on 1) The dental implant of claim 1 wherein said head has a cylindrical end having a plurality of bearing slots for receiving said legs, said head cylindrical end is connected to a central spherical portion which in turn is connected to a second cylindrical end, said cylindrical end having a diameter equal to the diameter of said fourth cylindrical body portion and having a conical shaped cavity complementary to said third conical body portion for mating therewith, said cylindrical end of said head further having four slots for increasing the elasticity of the mating end, said second cylindrical end of said head further having a central threaded bore for threading said head onto said fifth cylindrical portion of said body, whereby, by progressively forcing the third conical portion of said body against the conical cavity of said head, the elasticity of said head end portion increases the locking of the head and body. ### Claim 3 (depends on 1) The dental implant of claim 1, wherein the conicity of the first and second truncated conical portions of said body correspond with a standard conicity for drills used to form the cavity in the maxillary, whereby, a tight friction fit is obtained when implanted. ### Claim 4 (depends on 1, 2, 3) The dental implant of any one of claims 1, 2 or 3 wherein said threaded end of said body for attaching a dental prosthesis comprises an external threaded surface upon which a dental prosthesis can be threaded. ### Claim 5 (depends on 1, 2, 3) The dental implant of any one of claims 1, 2 or 3 wherein said threaded end of said body for attaching a dental prosthesis comprises an elongated internal threaded cylindrical portion into which a dental prosthesis can be threaded.