Patents by Inventor Gerald Niznick
Gerald Niznick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20050136380Abstract: Endosseous dental implants include an at least partly, externally-threaded body portion, an internal cavity or shaft with an opening to the cavity or shaft at the top surface of the implant, and, in the internal cavity or shaft, a threaded portion, multi-pointed/sided, or multi-slotted wrench-engaging surfaces and tri-lobed surfaces.Type: ApplicationFiled: December 19, 2003Publication date: June 23, 2005Inventor: Gerald Niznick
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Publication number: 20050136379Abstract: A multi-part abutment for use with an endosseous dental implant includes a first part with a tapered portion at its proximal end adapted to accept a dental restoration and an optional transfer cap, a distally-positioned external multi-lobed or other wrench-engaging portion, an inwardly-projecting non-circular bevel extending partly or entirely around the first part, connecting the proximal and wrench-engaging portions. The first part has an internal through passage with an internal projection or threads or both. The second abutment part, a screw, has a proximal region to engage the internal projection(s) or threads or both of the first part, and a threaded shank to engage internal threads in an endosseous dental implant.Type: ApplicationFiled: December 19, 2003Publication date: June 23, 2005Inventor: Gerald Niznick
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Patent number: 6287117Abstract: Root-form, endosseous dental implants for insertion into an opening in the jawbone of a patient include a body portion, a neck and/or neck/abutment portion above the body portion, and an internally-threaded shaft; a separate optional implant extender for placement atop the implant with a top surface that mimics the top surface of the implant, and includes a longitudinal passage that receives a healing screw, and a healing screw with a threaded distal end portion to pass through the longitudinal passage, engage the internal threads of the implant and hold the extender to the implant, or to cover the opening to the internally-threaded shaft of the implant where the optional extender is omitted.Type: GrantFiled: April 22, 1999Date of Patent: September 11, 2001Assignee: Sulzer Dental Inc.Inventor: Gerald A. Niznick
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Patent number: 6244867Abstract: A multi-part abutment adapted for use with dental implants such as cylindrical-shaped endosseous dental implants having an internal opening or passage with an internal, non-circular shape at the top, either internally or externally, includes part one that engages the opening or passage in, or projection at the top, of the implant at the distal end of part one, and fits into abutment part two, at the top end of part one. Part two has at its distal end a multi-sided cavity that interdigitates with a multi-sided periphery or other connector on part one so that part two can be placed in a plurality of positions over part one. At the top end of part two is a prosthesis-engaging or prosthesis-forming projection which may be at an angle to the longitudinal axis of the implant, or lie on the longitudinal axis of the implant.Type: GrantFiled: November 24, 1998Date of Patent: June 12, 2001Assignee: Sulzer Dental Inc.Inventors: Ines M. Aravena, Gerald A. Niznick
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Patent number: 5989028Abstract: One-piece, root-form, endosseous dental implants include, in a single implant, a body portion for insertion into an opening in the jawbone of a patient, a neck portion above the body portion, and an abutment portion above the neck portion. The abutment portion includes a peripheral shoulder and an opening into an internally-threaded shaft. The implant may also include internal or external wrench-engaging surfaces.Type: GrantFiled: July 2, 1997Date of Patent: November 23, 1999Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5885079Abstract: Endosseous dental implants having generally cylindrical-shaped or tapering bodies and, in some cases, external threads or ribs over a substantial portion of their external surface, may include internal or external wrench-engaging surfaces at the proximal end portion and include, below a relatively smooth proximal end or neck portion, an external transition zone with a rougher surface, and a body portion having greater surface roughness than the transition zone, or, on the body portion, an HA or TPS coating, to promote attachment of the implant to bone tissue when the implant is placed in a passage formed in bone tissue to receive the implant.Type: GrantFiled: June 22, 1998Date of Patent: March 23, 1999Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5622500Abstract: A healing collar for use with an endosseous dental implant that has an internal-threaded passage and at the top has a multi-sided male projection includes a cylindrical-shaped external surface, a first cavity at one end that has the same number of sides as the male projection atop the implant and a size and shape adapted to fit frictionally or non-frictionally over the male projection. At the other end of the healing collar is an opening leading to a second internal cavity having a plurality of sides adapted to engage a tool suitable for inserting an implant, joined to the healing collar, into a passage formed in the jawbone of a patient formed to receive the implant. Between the first and second internal cavities is an inwardly-projecting flange that has upper and lower annular surfaces for engaging the head a fixation screw, and the top surface of the implant, respectively.Type: GrantFiled: February 24, 1994Date of Patent: April 22, 1997Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5575650Abstract: A twist-bladed dental drill with an enhanced cutting tip for preparing surgical sites for endosseous implants includes a central, axially-extending internal passageway for carrying fluid through the shank of the drill to the outer surfaces of the drill.Type: GrantFiled: March 3, 1995Date of Patent: November 19, 1996Assignee: Core-Vent CorporationInventors: Gerald A. Niznick, Ines A. Traverse
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Patent number: 5571017Abstract: Endosseous dental implants having generally cylindrical-shaped bodies and self-tapping threads at the distal end and, in some case, external threads over a substantial portion of their external surface, include internal or external wrench-engaging surfaces at the proximal end portion and, between the relatively smooth distal and proximal end portions, an external middle region having greater surface roughness than the proximal or distal ends, or a coating, to promote attachment of the implant to bone tissue when the implant is placed in a generally-cylindrical passage formed in bone tissue to receive the implant.Type: GrantFiled: October 5, 1994Date of Patent: November 5, 1996Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5433606Abstract: An endosseous dental implant system includes a dental implant having a multi-sided projection at its top end and an internally threaded or unthreaded passage extending into the body of the implant through an opening in the projection at the top of the implant, and an abutment having an internal passage for receiving a fastener that passes through the internal passage of the abutment, and threads into the internal passage inside the implant. The abutment has a multi-sided internal cavity at its bottom end with each of the cavity sides perpendicular to the longitudinal axis of the abutment so that the cavity, when seated over the projection at the top of the implant, forms an anti-rotational, interlocking junction with the implant.Type: GrantFiled: July 28, 1993Date of Patent: July 18, 1995Assignee: Core-Vent CorporationInventors: Gerald A. Niznick, Alan R. Balfour
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Patent number: 5427527Abstract: A dental implant system utilizes a threaded implant which is cylindrical in form and has a large number of longitudinal channels so it can be (i) screwed into place in a bore hole in the patient's bone, (ii) pushed into place or (iii) first pushed into place and then turned to anchor it in bone ridges formed when it is pushed into place. Also an implant is given a conical shape it can be used for supporting artificial teeth in a residual ridge crest of a patient by drilling a smaller than normal cylindrical hole in the crest and carefully inserting the conical implant so that the bone is spread and makes additional contact with the implant.Type: GrantFiled: May 25, 1993Date of Patent: June 27, 1995Assignee: Vent Plant CorporationInventors: Gerald A. Niznick, Anthony Rinaldi, Leonard I. Linkow
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Patent number: 5334024Abstract: An abutment adapted for use with a dental implant includes a hollow tubular member of a size and shape adapted for use with an abutment or insert, and includes irregularities on its exterior surface that are adapted for engaging metals cast thereto. The tubular member has, at one end, a retention member for engaging a complementary retention member on the dental implant. The tubular member includes an internal passage adapted to receive a fastener for engaging a complementary fastener in the implant. The tubular member also includes an exterior sidewall portion adapted to form a positional transfer impression of the abutment in a dental cast.Type: GrantFiled: July 6, 1992Date of Patent: August 2, 1994Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5281140Abstract: A multi-part abutment adapted for use with dental implants such as cylindrical-shaped endosseous dental implants having an internal opening or passage with an internal, non-circular shape at the top includes part one that sealingly engages the opening or passage in the top of the implant at the bottom end of part one, and engages another abutment part, part two, at the top end of part one through a multi-sided projection. Part two has at its bottom end a multi-sided cavity that interdigitates with the projection from part one so that part two can be seated in a plurality of positions atop part one. At the top end of part two is a prosthesis-engaging or prosthesis-forming projection which can be at an angle to the longitudinal axis of the implant, or lie on the longitudinal axis of the implant.Type: GrantFiled: March 19, 1992Date of Patent: January 25, 1994Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5078607Abstract: A dental implant anchor includes a body portion having a first external wall portion carrying one or more circumferential projections separated by circumferential grooves and, below, a second external wall portion carrying threads. The implant can include a head portion with a smooth external wall; a through-hole and an apical hole passing through the bottom of the implant; and internal structure for engaging a tool for inserting the implant in a passage formed in bone tissue. This internal structure can be in a top portion, or in an internal passage in the body portion of the implant. The method for forming a passage in bone tissue to receive the implant includes forming a passage having a base with a diameter suited to self-tapping of the threaded part of the implant, and, above the base, a larger-diameter section to engage frictionally the circumferential projections.Type: GrantFiled: February 12, 1991Date of Patent: January 7, 1992Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5076788Abstract: A substantially cylindrically-shaped dental implant includes on its outer surface one or more longitudinally-extending grooves and, near the base of the implant, one or more transversely-extending openings that communicate with the grooves and with a chamber internal to the implant. The chamber also communicates through an upwardly-extending passage with an apical opening at the base of the implant to permit tissue, fluids and debris to escape from a jawbone opening formed to receive the implant.Type: GrantFiled: October 5, 1988Date of Patent: December 31, 1991Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5071350Abstract: A tiltable, rotatable, adjustable, castable insert adapted for use with dental implants includes two parts: first, a shaft with a receptacle attached to the shaft; second, within the receptacle, a tiltable, rotatable, adjustable prosthesis connector.Type: GrantFiled: March 21, 1990Date of Patent: December 10, 1991Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5062800Abstract: A handle adapted for engaging, holding and delivering a dental implant to a surgical site, and for holding a dental implant within a package for the implant comprises a body section with a middle portion adapted to fit into a container for the implant; a flange portion connected to the middle portion and adapted to engage an opening in the implant container; a first end portion connected to the middle portion and including an implant-engaging configuration internal or external to the handle; and a second end portion connected to the flange and including a configuration suitable for engaging an implant-insertion tool. The body portion includes an internal passage adapted to receive a shaft that includes a portion for securing an implant to the handle at the implant-engaging configuration.Type: GrantFiled: March 21, 1990Date of Patent: November 5, 1991Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5061181Abstract: A dental implant anchor includes a body portion having a first external wall portion carrying one or more circumferential projections separated by circumferential grooves and, below, a second external wall portion carrying threads. In some forms, the anchor also includes one or more longitudinally-oriented grooves on its exterior wall. The grooves extend across, and through the circumferential projections. The implant can include a head portion with a smooth external wall; a through-hole and an apical hole passing through the bottom of the implant; and internal structure for engaging a tool for inserting the implant in a passage formed in bone tissue. This internal structure can be in a top portion, or in an internal passage in the body portion of the implant.Type: GrantFiled: August 11, 1989Date of Patent: October 29, 1991Assignee: Core-Vent CorporationInventor: Gerald A. Niznick
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Patent number: 5030095Abstract: An angled abutment adapted for use with an endosseous dental implant includes two parts, a first part having a platform joined to a downwardly-projecting post with screw threads on its outer surface adapted for engagement in an internally-threaded shaft at the top of an endosseous dental implant, and a second part that includes an angled head joined to a shaft that projects downwardly from the head and is adapted for insertion and for cementing into the downwardly-projecting passage in the platform of the first part.Type: GrantFiled: August 16, 1989Date of Patent: July 9, 1991Inventor: Gerald A. Niznick
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Patent number: RE33796Abstract: A thermoplastic, one-piece coping insert adapted for use with a dental implant anchoring means includes a shaft that fits into an opening in a dental implant, an abutment head joined to the shaft and adapted to conform to, and fit smoothly on, or in the top surface of the dental implant, a bendable restriction or groove to facilitate preferential bending of the insert at the restriction when the insert is heated to the softening temperature of a thermoplastic, and a relatively unbendable post atop the restriction for receiving and supporting a dental prosthesis such as one or more prosthetic teeth.Type: GrantFiled: October 5, 1988Date of Patent: January 14, 1992Assignee: Core-Vent CorporationInventor: Gerald A. Niznick