Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
  • A61C8/0022—Self-screwing
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
  • A61B17/86—Pins or screws or threaded wires; nuts therefor
  • A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/70—Tooth crowns; Making thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
  • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
  • A61C8/006—Connecting devices for joining an upper structure with an implant member, e.g. spacers with polygonal positional means, e.g. hexagonal or octagonal
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
  • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
  • A61C8/0068—Connecting devices for joining an upper structure with an implant member, e.g. spacers with an additional screw
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
  • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
  • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
  • A61C8/0086—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools with shock absorbing means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y80/00—Products made by additive manufacturing
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
  • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
  • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
  • A61B17/86—Pins or screws or threaded wires; nuts therefor
  • A61B17/8605—Heads, i.e. proximal ends projecting from bone

Definitions

• the present invention pertains to a dental implant and orthopedic fastener with shock absorbing properties.
• a living tooth has a root which rests in the periodontal membrane, located between the root of the tooth and the jawbone.
• This membrane consists of tiny fibers that together provide a cushion which spreads and distributes the impact force transmitted from the tooth to the jawbone during mastication.
• the periodontal membrane acts as a shock absorber and has a damping effect on the impact force which the tooth receives thus providing a degree of flexibility between the crown and the alveolar process of the jaw.
• Implants are used in areas other than the jaw. Implants such as pedicle screws have been used to treat spinal disorders. The implants may also be secured to bones of the spine to secure rods extending between the bones.
• a dental implant in one embodiment includes an implant body having a coronal end and an opposing apical end, an outer surface and a compartment extending therein from a coronal end toward the apical end, the implant body including a gap between the compartment and the outer surface.
• a dental implant includes an implant body having a coronal end and an apical end opposite the coronal end, an outer surface, and a compartment extending therein from a coronal end toward the apical end.
• the implant body includes a gap between the compartment and the outer surface, wherein the gap is a closed hermitically sealed space.
• the compartment is defined by an internal surface being movable with respect to the outer surface of the implant body by deformation and flexibility of the implant body in a region closer to the coronal end than the apical end.
• a dental implant in one embodiment, includes an implant body having a coronal end and an opposing apical end, an outer surface and a cavity extending into the implant body from a coronal end toward the apical end.
• the implant body including a sealed space between the cavity and the outer surface.
• An internal surface of the cavity is movable with respect to the outer surface of the implant body by deformation of the sealed space.
• an implant body in one embodiment, includes a coronal end and an opposing apical end, the implant body including a first portion connected to a second portion defining a gap therebetween.
• the first portion has an outer surface
• the second portion includes a compartment extending therein from the coronal end toward the apical end. The second portion being movable relative to the first portion by deformation of the body material changing the geometry of the gap.
• a dental implant in one embodiment, includes an implant body having a coronal end and an opposing apical end, the implant body including a first portion connected to a second portion defining gap therebetween, the gap defining a closed hermetically sealed space.
• the second portion having an outer surface, and the first portion including a compartment extending therein from the coronal end toward the apical end.
• the first portion being movable relative to the second portion by deformation and flexibility of a region of the implant body changing a geometry of the gap.
• the dental implant further includes an abutment received within the compartment, and a prosthetic crown.
• An orthopedic fastener including a fastener body having a head, a neck, a threaded body and a distal tip.
• the fastener body including a hermetically sealed circumferentially extending gap between an outer surface of the fastener body and a longitudinal axis of the fastener body; the neck including a deformation region proximate the head that deforms upon an application of a force to the head allowing the head to bend relative to the longitudinal axis of the threaded body.
• An implant includes a fastener body having an externally threaded region with a distal tip and a proximal portion having a proximal end furthest from the distal tip along a longitudinal axis of the fastener body.
• the fastener body including a hermetically sealed circumferentially extending gap between an outer surface of the fastener body and the longitudinal axis of the fastener body; the fastener body includes a deformation region closer to the proximal end than the distal tip that deforms upon an application of a force to the proximal portion allowing the proximal portion to bend relative to the longitudinal axis of the threaded body.
• the externally threaded region is configured to be inserted into a bone of a patient in an in-use position and a part of the proximal portion of the portion end remains exposed from the bone in an in-use position.
• the proximal portion includes an exposed compartment that receives a prosthetic abutment supporting a crown for use as a dental implant, wherein the bone is the jaw.
• the proximal portion includes a tool receiving compartment to permit rotation of the fastener body to secure the threaded region into the bone of a patient, wherein the bone is a spinal bone.
• the proximal portion of the fastener that has no bone fixation properties and extends outside the bone in-use position, the extended portion includes a spherical or any other shape to be connected to an orthopedic system.
• An implant includes a fastener body having an externally threaded region with a distal tip and a proximal portion having a proximal end furthest from the distal tip along a longitudinal axis of the fastener body.
• the fastener body including a hermetically sealed circumferentially extending gap between an outer surface of the fastener body and the longitudinal axis of the fastener body;
• the fastener body has a cantilever structure.
• the proximal portion has a flexible and deformable properties while the other end toward the distal end is fixed and supported.
• FIG 1 is a partial cross-sectional view of a dental implant.
• FIG 2 is an exploded view of the dental implant of FIG 1.
• FIG 3 is the dental implant of FIG 1 showing the relative diameters and distances of various features of the dental implant.
• FIG 4A is a side plan view of the implant of FIG 1.
• FIG 4B is a cross sectional view of FIG 4A taken generally along the line of 4B-4B.
• FIG 5 is a cross sectional view of the dental implant withe the bore in a neutral position.
• FIG 6 is a cross sectional view of the dental implant of FIG 2 with the bore portion of the implant in a flexed position.
• FIG 7 is a partial cross-sectional view of the dental implant of FIG 1 with a prosthesis.
• FIG 8 is a partial cross-sectional view of a dental implant.
• FIG 9 is a partial cross-sectional view of a dental implant.
• FIG 10 is an exploded view of the dental implant of FIG 9.
• FIG 11 is a closeup view of a portion of the dental implant taken generally along line 11-11 of FIG 9.
• FIG 12 is an isometric partial cross-sectional view of implant 220.
• FIG 13 is a closeup view of a portion of the dental implant taken generally along line 13-13 of FIG 12.
• FIG 14 is an exploded view of the dental implant assembly.
• FIG 15 is cross-sectional view an orthopedic fastener.
• FIG 16 is a closeup view of a portion of the orthopedic fastener taken generally along line 16-16 of Fig 15.
• FIG 17 is a plan view of an orthopedic fastening system.
• FIG 18 is a close-up partial view of an orthopedic fastener in stressed position.
• FIG 19 is a cross-sectional view of an orthopedic fastener with an extension portion.
• a dental implant 110 includes an implant body 112 having a coronal end 114 and an opposing apical end 116.
• Implant body 112 has an outer surface 118 that in one embodiment includes outer threads 120.
• Implant body 112 includes a head region 122 having an opening 124 into a compartment 126 that extends from the coronal end 114 into the implant body 112 toward the apical end 116.
• Implant body 112 includes a gap 128 defined as the space between a first portion 130 of implant body 112 and a second portion 132 of implant body.
• the term apical end as used herein refers to a first end of implant body 112 located within a bone when implant body 112 is secured to a bone such as a jaw.
• coronal end refers to a second end the location of implant body 112 that is furthest from the apical end when the implant body 112 is secured to the bone.
• the coronal end of implant 112 is the portion of implant 112 that is external to a patient’s bone when implant 112 is secured to the patient’s bone and apical end is the portion of implant 112 is positioned within the patient’s bone when implant 112 is secured to the patient’s bone.
• Compartment 126 is located within first portion 130 and includes a first region 134 adjacent the coronal end 114 that is non-threaded and includes an abutment ledge 136 and internal side wall 138 that in one embodiment forms a hexagonal recess. Compartment 126 includes a second region 140 having internal threads 142 and a terminal bottom 144.
• compartment first region 134 includes a generally beveled surface 146 narrowing in diameter from the coronal end 114 toward wall 138 and abutment ledge 136.
• outer or second portion 132 has an outer diameter DI.
• Compartment opening 124 has a diameter D2.
• Abutment ledge 136 has a diameter D3.
• Internal threads 142 has a diameter D4.
• Diameter D4 is less than the diameter of abutment ledge D3.
• the diameter D2 of opening 124 is less than the outer diameter DI of first portion 130.
• Compartment 126 provides a support and attachment to the prosthetic feature.
• compartment includes a bevel shape 146, a polygon 138 and internal thread. In one embodiment some of these features but not all are included in compartment 126.
• gap 128 extends 360 degrees about a longitudinal axisl70 of body 112 of implant 110.
• Gap 128 includes a bottom portion 148 that forms a disc.
• Gap 128 includes a first cylindrical side wall space 150 in fluid communication with bottom portion 148.
• Gap 128 includes a second cylindrical side wall space 152 connected to first side wall space 150 with a transition space 154. Second cylindrical side wall space 152 terminates in the head region 122.
• gap 128 is a gap defined by the region between first or inner portion 130 and a second or outer portion 132.
• Inner portion 130 includes the material between internal threads 134 and an outer surface 156.
• Second or outer portion 132 includes the material between outer threads 120 and an inner surface 158.
• Gap 128 is the space defined between the outer surface 156 of inner portion 130 and the inner surface 158 of outer portion 132.
• the distance 160 defining the space between the outer surface 156 and inner surface 158 is between 0.02 and 3.0 mm with a preferred distance of 0.15 mm. In one embodiment distance 160 is substantially consistent along the entire gap 128.
• distance 160 varies such that the distance in one region of the sealed space is different that the distance in a different region of the sealed space.
• the distance of gap 128 may be the same for all gap regions including first cylindrical side wall space 150, second cylindrical side wall space 152, a transition space 154 and the bottom portion 148.
• connection 166 between a region 162 of first portion 130 and a region 164 of second portion 132. Connection 166 extends 360 degrees about implant body 112. Referring to FIG 4 A, FIG 4B and FIG 5 inner portion 130 moves relative to outer portion 132 upon the application of a force to the inner portion 130 through an abutmentl68. Abutment 168 includes an apical portion inserted into compartment xxx and a portion of abutment 168 proximate the coronal end 114 of implant body 112 is welded to the coronal end implant body 112. A crown (not shown) is secured to the coronal end of abutment 168.
• the abutment includes a threaded member that is threadedly received in generally internal threads 142 thereby securing the crown to implant 110.
• a threaded connector (not shown) is inserted through abutment 168 and threadedly connected to internal threads 142 thereby securing abutment 168 to implant body 112.
• gap 128 is uniform 360 degrees about the longitudinal axis of insert 110 in an unloaded state.
• the distance of gap 128 at a first location 172 is equal to the distance of gap 128 at a second location 174 that is 180 degrees from first location 172.
• FIG 6 when implant 110 is in a load stated gap 128 in a deformed position and is not uniform 360 degrees about the longitudinal axis of the insert.
• the size of the gap at a first location 172 will be different than the size of the gap at a second location 174 positioned 180 degrees from the first location 172.
• the gap at the second location 174 will be zero mm.
• the gap at the first location 172 will be greater than zero mm and greater than the gap at the second location 174 when a force is being applied to abutment 168 but less when there is no force being applied to abutment 168. Stated another way the gap at second location 174 is less when a force is applied to the prosthetic attachment in a load state then when implant body is in a neutral non-load state.
• the difference between the size of gap at first location 172 and the size of gap at second location 174 depends on the amount of the external lateral force. When the external force applied to the insert is greater than a predetermined amount the size of gap at second location 174 becomes zero and the external force is then carried by the second portion 132.
• the force applied to the first portion 130 may be applied in a vector Fl direction parallel to the longitudinal axis of the implant body or may be applied in a vector direction F2 non-parallel to the longitudinal axis at a non-perpendicular angle to longitudinal axis 170.
• Force F may also be in a direction F3 perpendicular to longitudinal axis 170.
• gap 128 has a certain distance as defined above. In one embodiment the gap 128 distance is uniform 360 degrees about the longitudinal axis of the insert.
• first portion moves relative to the second portion in a biased state such that the distance of gap 128 is not uniform about the longitudinal axis of the insert.
• the distance of gap 128 at a first location 172 is greater than the distance of gap 128 at a second location 174 positioned 180 degrees from location 172.
• positions 172 and 174 are in a plane that is perpendicular to the longitudinal axis of the insert. In one embodiment the plane does not intersect the coronal and apical ends of the insert.
• first portion or inner member 130 can move relative to the second portion or outer member 132 a greater distance in a direction non-parallel to the longitudinal axis than in a direction parallel to the longitudinal axis 170.
• gap 128 is hermitically sealed between first portion 130 and second portion 132 by connection 166.
• Gap 128 in one embodiment includes only a gas.
• gap 128 includes a material different from the material of the first portion 130 and the material of the second portion 132.
• the second material can be selected to provide a desired stiffness to provide the desired shock absorbing characteristic to a force applied to the first portion 130 through an abutmentl68.
• Gap 128 in one embodiment is hermitically sealed thereby avoiding bacteria from entering Gap 128 from a region external to the implant body such as a person’s mouth.
• first portion 130 and second portion 132 of dental implant body 112 is made of titanium and welded together along connection 166 in such a manner to create gap 128 between the first portion 130 and second portion 132.
• implant body is formed of a titanium alloy or stainless steel.
• insert 180 has a first portion 182 with geometry similar to first portion 130 described herein with the addition of an extension member 184 extending into a second portion 186 with geometry similar to second portion 132 with the addition of an apical cavity 188 that receives extension member 184 therein.
• Apical cavity includes a bottom 190, a bearing portion 192 a transition portion 194.
• extension member 184 acts to reduce the movement of first portion 182 with respect to outer portion 186 upon the application of a force to implant 180.
• extension 184 member is integral with first portion 182 and has a cylindrical geometry.
• the diameter of extension member 184 and bearing portion 192 have a geometry that permits extension member 184 to slide along the longitudinal axis 200 of implant body 180 relative to the second portion 186 upon an application of external load parallel to the longitudinal axis 200.
• Extension member 184 may bend about the longitudinal axis 200 to allow first portion 182 to move relative to second portion 186 in a non-parallel vector direction to longitudinal axis 200.
• Extension member 184 provides additional stiffness and resistance to external loads applied to implant 180 that are non-parallel to longitudinal axis 200.
• first portion 182 can move relative to second portion 186 in a direction along longitudinal axis 200 a first distance less than a second distance that at least a region of first portion 182 can move relative to second portion 186 in a vector direction perpendicular to longitudinal axis 200.
• first portion 182 and second portion 186 of implant 180 are formed of one of titanium, titanium alloy and stainless steel. As described above with respect to implant 110 first portion 182 moves relative to second portion 186 about a pivot zone 198. In one embodiment pivot zone 198 is in the coronal portion of the implant 180.
• implant 210 includes an implant body 212 formed from a first portion 214 received within a cavity 216 of a second portion 218.
• First portion 214 is hermetically sealed to second portion 218 at a coronal interface 220 proximate a coronal end 222 of implant body 212.
• Coronal interface 220 includes a first area 220a on first portion 214 and a second area 220b on second portion 218.
• First area 220a is located proximate the coronal end of first portion 214 and defines a circumferential surface that faces toward the apical end of the implant body 212.
• the first area 220a is the terminal end of a lip 256 extending from the coronal end toward the apical end of the first portion 214.
• An upper gap 258 is defined as the space between the lip 256 and an outer wall 260 of first portion 214.
• first portion 214 is further secured to second portion 218 at an apical region 224 of cavity 216.
• Lip 256 includes a first portion 256a proximate an outer surface being furthest from the longitudinal axis 250 of implant body 212 and extending generally parallel to longitudinal axis 250 and a second portion 256b extending radially outward from longitudinal axis 250 and defining the coronal end of implant body 212
• Implant body 212 has a coronal end 222 and an opposing apical end 226. In one implementation first portion 214 is secured to second portion 218 proximate the coronal end 222 of implant body 212. Implant body 212 has an outer surface 228 including outer threads 230. Implant body 212 includes a head region 232 having an opening 234 into a compartment 236 that extends from the coronal end 222 into implant body 212 toward the apical end 226.
• a continuous gap 238 is defined by the space between the outer wall 240 of first portion 214 and the cavity wall 242 of cavity 216 of second portion 218.
• gap 238 is circumferentially positioned within implant body 212 and radially spaced from the outer surface 228 and radially spaced from compartment 236.
• gap 238 includes a first region 244, a second region 246, and a third region 248.
• Each gap portion is defined by a portion outer wall 240 of first portion 214 and cavity wall 242 of cavity 216.
• First region 244 terminates proximate the coronal end 22 of implant body 212 at the upper gap 258.
• Gap 238 as used herein includes upper gap 258.
• the diameter of the apical region 224 is less than the diameter of the region adjacent thereto and closer to the coronal end.
• the first portion and second portion may provide an interference fit in the apical region.
• the apical portion 224 of cavity 216 and the apical portion 225 of first portion 214 are welded together to eliminate any gap in the apical region.
• the implant body is 3D printed as a unitary component and no gap in the apical portion of the implant body 212.
• the distance between the outer wall 240 of first portion 214 and the cavity wall 242 of cavity 216 is between 0.02mm and 0.5mm.
• the distance between outer wall 240 and cavity wall 242 is measured radially in a direction perpendicular to the longitudinal axis 250 of implant 210.
• upper gap 258 is the same distance as the first region 244 of gap 238.
• upper gap 258 has a distance between 0.02 mm and 0.5 mm and is greater than gap 238 at first region 244.
• first region 244 aligns with head region 232 along a longitudinal axis 250 of implant 210.
• Third region 248 aligns with an internal threaded 252 region of compartment 236.
• Second region 246 is a transition between the first region 244 and the third region 248. Wherein the distance between the first portion of compartment 236 and the outer surface is less than the distance between the third region of compartment 236 and the outer surface 228. In one embodiment the distance of the gap 238 tapers from a first distance at the coronal region of gap 238 to a second distance at the apical region of gap 238 where the second distance is less than the first distance. In one implementation the taper is continuous such that the distance of gap 238 is continuously reduced from the coronal region of gap 238 toward the apical region of gap 238. In one implementation gap 238 tapers from the coronal end of gap 238 to the apical end of gap 238.
• the radial distance of gap 238 is substantially similar from the coronal region to the apical region. In one implementation the radial distance of gap 238 varies from the coronal region to the apical region. In one implementation the thickness T1 of the first portion 214 between upper gap 258 and an upper terminal surface 262 at the coronal end of implant body 212 is between 0.02 mm and 0.3 mm. In one implementation the thickness T2 of lip 256 is between 0.05 mm and 0.3 mm.
• Gap 238 includes a coronal end, in contrast to implant 110, gap 238 does not include a bottom most portion extending perpendicular to longitudinal axis 250.
• the first portion 130 and second portion 132 are each formed from one of stainless steel, titanium and a PEEK (polyether ether ketone) polymer. In one implementation first portion 130 and second portion 132 are formed from the same material. In one implementation first portion 130 and second portion 132 are formed from different materials. In one implementation gap 128 is free from a solid material.
• gap 128 is filled with a material different from the material of the first portion and the second portion such as silicon or a fluoroelastomer such as Viton having a lower viscosity than the material of the first portion and the second portion allowing for a change of the geometry of the gap upon an application of a force to the compartment as discussed herein.
• a material different from the material of the first portion and the second portion such as silicon or a fluoroelastomer such as Viton having a lower viscosity than the material of the first portion and the second portion allowing for a change of the geometry of the gap upon an application of a force to the compartment as discussed herein.
• gap 238 is defined by outer wall 240 of first portion 214 and cavity wall 242 of second portion 218. Stated another way the surface of the gap closest to the longitudinal axis of implant body 212 in a direction perpendicular to the longitudinal axis is outer wall 240 of first portion 214 and the surface of gap 238 further from the longitudinal axis in a direction perpendicular to the longitudinal axis is cavity wall 242.
• the outer wall 240 of the first portion 214 defines the inner surface of gap 238 as defined above.
• first portion 182 and the second portion 186 of implant 180 are each formed from one of stainless steel, titanium and a polymer.
• first portion 182 and second portion 186 are formed from the same material. In one implementation first portion 182 and second portion 186 are formed from different materials. In one implementation gap 196 is free from a solid material. In one implementation gap 196 is filled with a material different from the material of the first portion and the second portion such as silicon or Viton.
• first portion 252 and the second portion 254 of implant 180 are each formed from one of stainless steel, titanium and a polymer. In one implementation first portion 252 and second portion 254 are formed from the same material. In one implementation first portion 252 and second portion 254 are formed from different materials. In one implementation gap 238 is free from a solid material. In one implementation gap 238 is filled with a material different from the material of the first portion and the second portion such as Silicon or Viton.
• a living tooth has a root which rests in the periodontal membrane, located between the root of the tooth and the jawbone that acts as a shock absorber and has a damping effect on the impact force which the tooth receives. Since a dental implant is connected directly to the jawbone without the benefit of the periodontal membrane the implants 110 and 180 as described herein provide the shock absorber function by allowing movement of the first portion relative to the second portion upon the application of a force to the implant.
• Compartment 236 includes an anti -rotational feature like a bevel surface, internal threads, a hexagon shape or any other anti -rotational shape to receive abutment 264 therein and prevent rotation of abutment 264 relative to compartment 236.
• a prosthetic tooth such as a crown 270 is affixed to the coronal end of abutment 264.
• a fastener 272 includes threads (not shown) that is threadedly received within a threaded apical portion of compartment 236 to secure abutment to implant body 212. Internal threads 266 of first portion 214 are used to securely position abutment 264 within compartment 236. Crown 270 as is known in the art is secured to abutment 264.
• a force applied to crown 270 is transferred to the first portion 214 of implant 210.
• the force may be applied in a vector Fl direction parallel to a longitudinal axis 250 of the implant body 212 or may be applied in a vector direction F2 non-parallel to the longitudinal axis 250 at a nonperpendicular angle to longitudinal axis 250.
• Force F may also be in a direction F3 perpendicular to longitudinal axis 26 or any combination of vectors Fl, F2 and F3.
• a force F4 may also be about longitudinal axis 250.
• Bending region 268 is located at the distal apical end of gap 238 while the deformation region 222 is located at the coronal portion of implant body 212.
• a force applied to implant 110 and implant 180 discussed above both deforms and bends at the same coronal region.
• abutment 264 and the prosthetic tooth moves with the first portion 214 relative to the outer wall of the second portion 218.
• the external force is absorbed by the movement of the first portion 214 relative to the second portion.
• the first portion returns to the original relaxed non-stressed position relative to the second portion.
• the implant body acts as a shock absorber to external forces applied to the prosthetic tooth.
• the implant body behaves as a spring such that the first portion moves back to an equilibrium position once the external force is removed from the prosthetic tooth.
• First portion 214 is welded to and hermetically sealed with respect to second portion 218 such that when region about upper gap 258 deforms no foreign material can enter upper gap 258 and any region of gap 238.
• the connection between first portion 214 and second portion 218 closes upper gap 258 and gap 238 from any interaction with the outside environment.
• first portion 214 is welded to second portion 218 hermetically sealing gap 238 and upper gap 258 so that no foreign matter can enter into the gap.
• upper gap 258 and gap 238 are identified with different reference numerals in one implementation upper gap 258 and gap 238 are in fluid communication with one another.
• the region surrounding upper gap 258 acts as a living hinge allowing first portion to move relative to the second portion upon the application of a force to the prosthetic tooth.
• the welded connection between the first portion and the second portion is at the coronal end of the implant body 212. Stated another way first portion 214 bends relative to second portion 218 proximate upper gap 258 as the region about upper gap 258 deforms in response to the application of force to the prosthetic tooth.
• implant body 212 is a single component that cannot be disassembled. The welding of first portion 214 and second portion 218 to one another creates a single integral component that cannot be dissembled.
• implant body 212 is formed by 3d printing forming a single integral component that includes the closed hermetically sealed gap 238 and upper gap 258 described herein. 3D printing of implant body 212 can use metal materials. 3D printing known in the art can also use other biocompatible materials. Biocompatible materials that provide sufficient deformation properties of the deformation region allowing the walls defining compartment to move relative to the external surface of implant body 212 may be used.
• gap 238 are in fluid communication with each other and are closed to the exterior of implant body 212 such that no material either solid, fluid, or in the form of a gas can enter gap 238 from outside of the implant body 212.
• gap 238 is hermetically sealed with respect to any material outside of implant body 212.
• Gap 238 are hermetically sealed such that the gap is secure against the entry of microorganisms external to the implant body 212.
• Fastener 300 is secured to a bone of a patient.
• Fastener 300 includes a body having an externally threaded portion 302, a head 304 and a neck portion 306 intermediate body 302 and extended head 304.
• fastener 300 is a unitary member either formed by welding two or more components together or by 3d printing as is known in the art using metal material or other biocompatible materials.
• Fastener 300 includes a circumferential gap 308 positioned intermediate an outer wall 310 of fastener 300 and a longitudinal axis 312 of the fastener.
• Gap 308 defines a closed hermetically sealed space having a first region 314 and a second region 316.
• First region 314 is located proximate head 304 within neck portion 306 and is in fluid communication with second region 316.
• Second region 316 extends from first region 314 extending in a direction toward a distal tip 318 of threaded body 302.
• First region 314 of gap 308 has a first distance 318 in the direction perpendicular to the longitudinal axis 312 that is greater than a second distance 320 of the second region 316 perpendicular to the longitudinal axis 312.
• Gap 308 is defined by an outer wall 322 and an inner wall 324.
• the distance 326 between of the outer wall 322 defining gap 308 proximate the first region 314 and the outer wall 310 of the neck portion is less than the distance 330 between the outer wall 322 of the gap proximate the second region and the outer wall 332 of the threaded portion 302.
• the head moves relative to the threaded portion by deformation of 322 the fastener body proximate the first region 314 of gap 308 and bending of bending region proximate the distal end of gap 308.
• the second region 316 of gap 308 extends a predetermined distance toward the distal tip 318 defining a distal end 336 of gap 308.
• the fastener body deforms proximate the first region 314 of gap 308 and the neck portion and head 304 bend about a bending region adjacent the distal end 336 of gap 308.
• fastener 300 provides a shock absorbing property.
• fastener 300 is manufactured as discussed above with respect to dental implant body 210 by two or more parts welded together, or via 3D printing with a metal or biocompatible material.
• a first portion of fastener 300 is fit within a cavity of a second portion of fastener 300.
• the cavity having a cavity bottom 340.
• the geometry of an outer wall of the first portion of fastener 300 and the geometry of a cavity wall defining the cavity of the second portion are such that when a distal portion of the first portion is placed within the cavity of the second portion gap 308 is formed.
• the region of fastener 300 distal end 336 of gap portion 316 of gap 308 does not create any gap.
• a distal region 338 of the first portion distal the distal end 336 of gap portion 316 is welded to the second portion ensuring there is no gap in the region of fastener 300 distal to distal end 336 of gap 308.
• the distal direction is the direction away from the free end of head 304 along longitudinal axis 312.
• a deformation region is formed proximate first portion 314 of gap 308 and a bending region is formed about the distal end of gap 336 as described above with respect to implant body 210.
• head 304 moves relative to the threaded portion 302 by deformation of the deformation region and bending about the bending region proximate the distal end of gap 336.
• Fastener 300 may be formed from materials as discussed herein with respect to implant body 212.
• fastener 300 can be used in an orthopedic system in which a first fastener 300 and a second fastener are secured to the same or different bones of a patient.
• a rod 334 is secured to the extended heads of each of the first and second fasteners and secured thereto with a tulip connector as is known in the art.
• one or both of the fasteners are preloaded with a force such that at least one of the fasteners are in a non-equilibrium position.
• the pre-loaded fastener will move to the equilibrium position and will only move away from the equilibrium position upon the application of an external force to head 304.
• another fastener 400 includes a head 402, a neck 404 and a threaded body 406 terminating in a distal tip 408.
• Fastener 400 includes a gap 410 including an upper region 412 proximate neck 404 and a second region 414 in fluid communication with upper region 412 and extending in a direction toward distal tip 408.
• Gap 410 defines a closed hermitically sealed space preventing from any material external to the fastener 400 to enter into gap 410 such as biological material.
• Fastener 400 is manufactured as described herein with the other implants and fastener 300 and maybe formed from the same materials described with respect to fastener 300.
• Fastener 400 includes an extension member 416 extending from head 402 through neck 404 into a cavity 426 within threaded body 406.
• Gap 410 is defined as the space between extension member 416 and the wall defining cavity 426.
• Upper region 412 of gap 410 defines a space having a first distance extending radially outward from and perpendicular to a longitudinal axis 418 of fastener 400.
• Second region 416 of gap 410 defines a space having a second distance extending radially outward from and perpendicular to a longitudinal axis 418 of fastener 400 that is less than the first distance.
• extension member 416 includes a second extension member 420 extending therefrom in a direction toward distal tip 408 and being received in a second cavity 428 acting as a bearing surface for second extension member 420.
• the function and operation of second extension member 420 is similar to the extension member 184 of implant body 180 describe above.
• Fastener 400 similar to fastener 300 is secured to a patient’s bone via the threaded screw portion 422 on threaded body 406.
• Fastener 400 may also be used in an orthopedic system to affix a rod between portions of a bone or between bones such as spinal vertebrae. Similar to fastener 300 upon the application of a force to head 402 the geometry of gap 410 changes from a non-stressed or equilibrium position to a different geometry. This occurs by deformation of the fastener body proximate the upper region 412 of gap 410.
• the head and extension member also bend at the same region. Similar to fastener 300 the thickness of the outer wall of the fastener body proximate the upper region 412 of gap 410 is sufficiently thin to allow for deformation of the fastener body at that region to allow head 402 to move relative to the threaded body 406 that is affixed to the patient’s bone. In one implementation the thickness of the wall is sufficient to allow for movement of head 402 in response to 500 N of force applied to head 402 without the walls defining gap 410 from contacting one another. This feature applies to all of the implants and fasteners discussed herein.
• fastener 300 and fastener 400 are used and may be used in dynamic spinal stabilization systems to attach rods between spinal vertebrae. However, fastener 300 and fastener 400 are also used wherever bones are joined in a surgical procedure. Fastener 300 and fastener 400 provide both a shock absorbing feature as well as the ability to preload the fastener to assist in biasing bones toward one another to maintain flexibility.
• Implants 110 and 210 include a coronal portion which may also be described as a proximal portion and a threaded portion that is designed to be embedded into a jaw of a patient. The coronal or proximal portion is not fully embedded into the jaw in an in-use position and exposed from the jaw.
• fastener 300 and fastener 400 include a head that may also be referred to as a proximal portion as the head extends from and outside a bone of a patient when the threaded portion is embedded into the bone of a patient.
• Implants 100, 210 and fasteners 300 and 400 may be referred to generically to by the term implant as a portion of implants 100, 210 and fasteners 300, 400 are implanted into a bone of a patient.

Landscapes

• Health & Medical Sciences (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Veterinary Medicine (AREA)
• Public Health (AREA)
• General Health & Medical Sciences (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Epidemiology (AREA)
• Dentistry (AREA)
• Surgery (AREA)
• Neurology (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Heart & Thoracic Surgery (AREA)
• Molecular Biology (AREA)
• Medical Informatics (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Dental Prosthetics (AREA)
• Prostheses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=81207747

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (5)

• 2021
  • 2021-10-13 EP EP21879597.9A patent/EP4178482A1/de active Pending
  • 2021-10-13 WO PCT/IB2021/000694 patent/WO2022079491A1/en unknown
  • 2021-10-13 KR KR1020237004993A patent/KR20230085130A/ko unknown
  • 2021-10-13 BR BR112023002682A patent/BR112023002682A2/pt unknown

Also Published As

Similar Documents

Legal Events