WO2022238989A1

WO2022238989A1 - Improved fixation dental implant

Info

Publication number: WO2022238989A1
Application number: PCT/IL2022/050452
Authority: WO
Inventors: Rami SUSSAN
Original assignee: Sussan Rami
Priority date: 2021-05-12
Filing date: 2022-05-02
Publication date: 2022-11-17

Abstract

A dental implant which may be designed for improved affixing to bone. Optionally, the fixture may be geometrically built to potentially assist with a better and improved grip of bone and/or may be designed to enhance with the osseointegration. For example, the implant may have horizontal grooves under the threading. Optionally, bone may enter into these grooves and fix the position of the implant. In some embodiments, bone may enter into the grooves by elastic recovery after being stressed and/or displaced by the drill and/or the implant. Alternatively, and/or additionally, in an embodiment, the bone may grow into the grooves overtime.

Description

Title: Improved fixation dental implant

RELATED APPLICATION/S

This application claims the benefit of priority under 35 USC §119(e) ofU.S. Provisional Patent Application No. 63/187,449 filed 12 May 2020, the contents of which are incorporated herein by reference in their entirety.

FIELD AND BACKGROUND OF THE INVENTION

The present invention, in some embodiments thereof, relates to a fixture of a dental implant and, more particularly, but not exclusively, a fixture with improved fixation properties.

Japanese patent publication no. JP2015006247A appears to disclose, “a fixture for a dental implant and the dental implant capable of stably obtaining support force for a structural component against occlusal force for a long term.” “There are provided a fixture 1 for a dental implant and the dental implant comprising the fixture 1 for the dental implant. The fixture 1 for the dental implant comprises: a main body 2 in an approximately columnar shape; at least one recess 3 positioned at the periphery 23 of the main body 2; and at least one lateral groove 4A which is positioned at the periphery 23 and whose one end part is connected to at least one recess 3. The at least one lateral groove 4a includes: an opening part which is open to the periphery 23; and an extended width region whose groove width is larger than that at the opening part.”

Japanese patent no. JPH0741047B2 appears to disclose, “a dental artificial dental root for fixing a fixed denture, an installation tool therefor, and a method for inserting the same. An artificial dental root is a generally metallic substructure used to support a denture, and the artificial root is a mechanical tooth that is used as a natural post, a tooth that is attached to the mandible or maxilla. Allows you to replace. The key to placing a dental prosthesis is a rapid blocking within the bone, and even the slightest wobble will ultimately result in poor treatment. Once the implant is placed in the bone, a tapped ring or screw is attached to the outside of the implant, which is usually a threaded rod. Dentures are cemented onto a ring or screw threaded with such a tap.” US patent no. US6315564B1 appears to disclose that, “An implant to be secured in a bone of a patient comprises an elongated body having an attachment portion to be inserted into the bone. The attachment portion includes a thread having a first cross-section dimension and a second cross-section dimension outwardly of the first dimension and larger than the first dimension.”

US patent application publication no. US20090048633A1 appears to disclose, “A screw type fixture...” “In the fixture of the present invention, small screw threads (231) are formed on a ridge of a large screw thread (233) formed on the circumferential outer surface of the fixture, so that reliable fixing force of the fixture to cancellous bone is ensured by the increased contact surface, and stress around the large screw thread (233) is distributed. Furthermore, in the present invention, the pitch of the screw thread of a cortical bone coupling part (33) of the fixture, which is implanted in cortical bone, and the difference between the outer diameter thereof and the root diameter thereof are less than those of a cancellous bone coupling part (34) of the fixture, so that stress otherwise concentrated on the cortical bone is distributed to the cancellous bone, thus preventing bone resorption, and promoting osseointegration.”

Japanese patent no. JP5845375B1 appears to disclose that “A living body- friendly implant is provided by forming a convex surface which is a curved surface on the tip side surface of a screw thread. An implant includes an elongated member having a distal end portion and a proximal end portion, and a screw thread including a first screw thread and a second screw thread. The elongate member 10 is disposed on the proximal side of the distal end portion 12, and is disposed on the proximal side of the first thread region 32 having the first thread 20A-1 and the first thread region 32. And a second thread region 34 having two threads 20A-2. The first thread 20A-1 includes a distal end surface 22A including the first convex surface 220 and a proximal end surface 24A. The second thread 20A-2 includes an outer peripheral surface 26A.”

Additional background art includes Ma, Pan et al., Influence of Thread Pitch, Helix Angle, and Compactness on Micromotion of Immediately Uoaded Implants in Three Types of Bone Quality: A Three-Dimensional Finite Element Analysis; Bio Med Research International; Volume 2014, Article ID 983103 https :/7doi . org/ nd Pandey Ajay et al.; Macrodesign of Dental

implant - A review; Journal of Applied Dental and Medical Sciences; NLM ID: 101671413 ISSN:2454-2288; Volume 3 Issue2 April-June 2017 and TRI Academy; TRI(R) Performance Concept Version 2, TRI Dental Implants Int. AG Bosch 80A CH- 6331 Hiinenberg. Some embodiments of the invention are herein described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of embodiments of the invention. In this regard, the description taken with the drawings makes apparent to those skilled in the art how embodiments of the invention may be practiced.

SUMMARY OF THE INVENTION

Unless otherwise defined, all technical and/or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of embodiments of the invention, exemplary methods and/or materials are described below. In case of conflict, the patent specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and are not intended to be necessarily limiting.

According to an aspect of some embodiments of the invention, there is provided a dental implant including a fixture having: a head portion located; and a body portion located apical to the head portion, wherein the body portion is apical to the head portion, and includes: a plurality of thread lines separated by threat roots; and a groove, wherein the groove deeper than a nearest thread root.

According to some embodiments of the invention, the head portion has an indent configured for gripping with a screwdriver.

According to some embodiments of the invention, the body portion is tapered. According to some embodiments of the invention, the thread roots start at an edge of the groove.

According to some embodiments of the invention, the thread roots start inside the groove. According to some embodiments of the invention, the thread lines are beveled.

According to some embodiments of the invention, the thread lines have a leading flank angle between 30 to 60 degrees.

According to some embodiments of the invention, the thread lines have a trailing flank angle of between 40 to 60 degrees.

According to some embodiments of the invention, a difference between a trailing flank angle and a leading flank angle is between 50 to 75 degrees.

According to some embodiments of the invention, the plurality of thread lines includes between 3 to 10 lines.

According to some embodiments of the invention, the thread lines completely encircle the fixture.

According to some embodiments of the invention, the thread lines partially encircle the fixture.

According to some embodiments of the invention, the thread lines are parallel to each other.

According to some embodiments of the invention, the thread lines run at an angle between 10 degrees to 45 degrees around the fixture.

According to some embodiments of the invention, the thread lines have a width ranging from 1/100 mm to 10mm.

According to some embodiments of the invention, the thread lines are raised between about 1/100 mm to 5mm above the minor diameter of the fixture.

According to some embodiments of the invention, of thread lines are between 1/lOOmm to 5mm apart from each other.

According to some embodiments of the invention, the groove is beveled.

According to some embodiments of the invention, a second flank angle is between 30 to 60degrees.

According to some embodiments of the invention, the dental implant includes between 1 to 30 of the grooves.

According to some embodiments of the invention, the groove completely encircles the fixture.

According to some embodiments of the invention, the groove partially encircle the fixture. According to some embodiments of the invention, including a plurality of the grooves,

According to sime embodiments of the invention, the grooves run parallel to each other.

According to some embodiments of the invention, of grooves run perpendicular to an axis of the fixture.

According to some embodiments of the invention, the groove runs at an angle of between 5 to 25 degrees to an axis of the fixture.

According to some embodiments of the invention, the groove runs at an angle of between 25 to 65 degrees to an axis of the fixture.

According to some embodiments of the invention, the grooves runs at an angle of between 65 to 90 degrees to an axis of the fixture.

According to some embodiments of the invention, the groove has a width ranging from 1/10 mm to 2 mm.

According to some embodiments of the invention, the grooves have a depth of between 1/10 mm to 3 mm deeper than a minor diameter of the fixture.

According to some embodiments of the invention, the dental implant includes multiple grooves between 1/10 mm to 5mm apart from each other.

According to an aspect of some embodiments of the invention, there is provided a method of fixing a dental implant including: screwing a fixture into a bone; distributing forces of the screwing over a plurality of thread lines on a body of the fixture; compressing a bone into a groove on the body of the fixture the groove being deeper than the minor diameter of the fixture; and holding the fixture in position with the bone.

According to some embodiments of the invention, the compressing and the holding is via elastic forces.

According to some embodiments of the invention, the method further includes: reducing heat from the screwing via spreading the screwing forces over the plurality of thread lines on the body of the fixture.

According to some embodiments of the invention, the reducing the heat also reduces bone tissue necrosis.

According to some embodiments of the invention, the compressing the bone into the groove on the body of the fixture fixes the fixture in place. According to some embodiments of the invention, the method further includes growing bone into the groove on the body of the fixture.

According to some embodiments of the invention, the method further includes growing bone into the plurality of thread lines on the body of the fixture, fixing the fixture in place.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING1S)

Some embodiments of the invention are herein described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of embodiments of the invention. In this regard, the description taken with the drawings makes apparent to those skilled in the art how embodiments of the invention may be practiced.

In the drawings:

Figure 1 is a schematic drawing illustrating an embodiment of the current invention;

Figure 2 is a schematic drawing illustrating an embodiment of the current invention;

Figure 3 is a schematic drawing illustrating screw threads of an embodiment of the current invention;

Figure 4 is a flow chart illustrating an embodiment of the current invention; and

Figure 5 is a block diagram illustrating an embodiment of the current invention.

DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION

The present invention, in some embodiments thereof, relates to a fixture of a dental implant and, more particularly, but not exclusively, a fixture with one or more grooves that may be cut out from the threaded portion of the implant deeper than the threading. OVERVIEW

An aspect of some embodiments of the current invention relates to a fixture of a dental implant. Optionally, the fixture may have one or more grooves cut out of the fixture that may be deeper than the threading.

An embodiment of the current invention may be a dental implant which may be designed for improved affixing to bone. Specifically, but not exclusively an embodiment of the invention is a fixture of a dental implant that may be geometrically built to potentially assist with a better and improved grip of the bone and/or may be designed to enhance with the osseointegration.

Alternatively, and/or additionally, in an embodiment, the implant may have horizontal grooves under the threading. Optionally, bone may enter into these grooves and fix the position of the implant. In some embodiments, bone may enter into the grooves by elastic recovery after being stressed and/or displaced by the drill and/or the implant. Alternatively, and/or additionally, in an embodiment, the bone may grow into the grooves over time.

SPECIFIC EMBODIMENTS

Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not necessarily limited in its application to the details of construction and the arrangement of the components and/or methods set forth in the following description and/or illustrated in the drawings and/or the Examples. The invention is capable of other embodiments or of being practiced or carried out in various ways.

Figure 1 is a schematic drawing illustrating an embodiment of the current invention. In some embodiments a fixture may include thread lines 106 and roots 108. Optionally, the fixture includes multiple thread lines 106 (e.g., is multi threading, the threading is multistarted). Optionally, a fixture may have one or more grooves 104 cut out of the fixture deeper than the thread lines. Additionally or alternatively the grooves 104 may be cut deeper than the roots 108. Additionally, and/or alternatively, in an embodiment, the grooves 104 may be cut deeper than the minor diameter of the fixture at the location of the groove 104.

In an embodiment, as a result of the bone elasticity and/or return, the bone may make an initial grip on the fixture. For example, the geometric structure of the bone may give it a feature of elasticity so that after pressure may be applied to the bone and/or the bone may be pushed and/or compressed, the bone may elastically restore itself to its original shape.

In some embodiments, the fixture may comprise a head portion 102 and/or a body portion 110 located below the head portion. Optionally, the head of the fixture may be fixed above the level of the bone. Optionally, the head of the fixture may be fixed above the level of the gum. Optionally, the head of the fixture may comprise thread lines 106 and/or grooves 104. Optionally, the thread lines 106 and/or grooves 104 may differ in size, angle and/or distance apart from the thread lines 106 and grooves 104 on the body portion 110 of the fixture. Optionally, the thread lines 106 and/or grooves 104 of the head portion may be parallel to each other. Optionally, the thread lines 106 and/or grooves of the head portion may be parallel to the top edge of the head of the fixture. Optionally, the head of the fixture may have one or more indents which allow the fixture to be screwed, drilled and/or tightened into the bone, e.g., an indented shape for a screwdriver such as a flat head or slotted head screwdriver, Phillips screwdriver, Pozidriv screwdriver, Robertson or square screwdriver, Torx screwdriver, hex or hexagon screwdriver.

In some embodiments, of a fixture, the body portion 110 of the fixture may be located below the head portion 102 of the fixture. Optionally, the body portion 110 may be tapered. Optionally, the body portion 110 of the fixture may comprise thread lines 106 and/or grooves 104. Optionally, the thread lines 106 and/or grooves 104 may differ in size, depth, width angle and/or distance apart. Optionally, the thread lines 106 and/or grooves 104 of the body portion 110 may be parallel to each other. Optionally, the thread 106 lines of the body portion 110 may be parallel to each other. Optionally, the grooves 104 of the body portion 110 may be parallel to each other.

Specifically, but not exclusively, in an embodiment, the grooves 104 in the fixture may enhance the bone's initial and/or long-term grip on the fixture. Optionally, the enhanced initial grip and/or locking may help to prevent displacement and/or the possibility of coming free. Alternatively, and/or additionally, in an embodiment, the grooves 104 may provide additional area for bone mass to grow and/or additional connection to the fixture.

In some embodiments, the grooves 104 may be beveled at various angles. For example, the flank angle of one side of the groove 104 may range from 0 degrees to 30 degrees, and/or from 30 degrees to 60 degrees, and/or from 60 to 90 degrees, and/or the flank angle of the second side of the groove 104 may range from 0 degrees to 30 degrees, and/or from 30 degrees to 60 degrees, and/or from 60 to 90 degrees.

Alternatively, and/or additionally, in an embodiment, a groove 104 may serve as a starting point for one or more thread roots 108. For example, the thread root 108 of a thread line 106 may start at the edge of or within a groove 104. Alternatively, and/or additionally, in an embodiment, a groove 104 may have a width ranging from 0.0001mm to 5mm, and/or from 5mm to 10mm, and/or from 10mm to 30mm.

Alternatively, and/or additionally, in an embodiment, there may be various numbers of the grooves 104. For example, the number of grooves 104 in a fixture may range from 1 to 5 and/or between 5 to 10 and/or 10 to 30.

In some embodiments, the one or more grooves 104 may have the form of a complete or partial ring (e.g., completely or partially encircling the implant). Optionally, some and/or all grooves 104 may be at various angles. For example a groove 104 may be horizontal (e.g., perpendicular to the axis of the fixture) and/or a groove 104’ may be vertical (e.g., parallel to the axis of the fixture). Alternatively, and/or additionally, in an embodiment, one or more grooves 104 may be helical and/or oriented at various helix angles. For example, a groove 104 may run horizontally around the fixture and/or may run at an angle between 0 degrees to 30 degrees, and/or between 30 degrees to 60 degrees, and/or between 60 degrees to 90 degrees (vertical). Alternatively, and/or additionally, in an embodiment, one or more grooves 104 may run all around the fixture and/or partially around the fixture and/or may run at different horizontal angles at different points on the fixture.

In some embodiments, a groove 104 may be of various depths. For example, a groove 104 may be between about 0.0001 mm to 1mm deeper than the minor diameter of the fixture, between about 1 mm to 3mm deeper than the minor diameter of the fixture and/or between about 3mm to 5mm deeper than the minor diameter of the fixture and/or between about 5mm to 1cm deeper than the minor diameter of the fixture. Alternatively, and/or additionally, in an embodiment, one or more grooves 104 may be deeper at certain point(s) on the fixture and/or at other depths at other point(s) on the fixture. Alternatively, and/or additionally, in an embodiment, grooves 104 may be parallel to each other. Optionally, grooves 104 may be parallel to the top edge of the head of the fixture. Alternatively, and/or additionally, in an embodiment, grooves 104 may be of various distances one from the other. For example, parallel grooves 104 may be between about 0.001mm to 1mm apart from each other and/or 1mm to 3mm apart from each other and/or 3mm to 5mm apart from each other and/or between 5mm to 2cm apart from each other and/or between 2cm to 10cm apart from each other.

Figure 2 is a schematic closeup drawing illustrating an embodiment of the current invention. Alternatively, and/or additionally, in an embodiment, the threading profde may be constructed with one or more threading starting lines or thread roots 108. Optionally, this may result in a fine threading or thread lines 106 which may aid in a slower drilling process. In some embodiments, the finer threading profile and/or the slower drilling process may aid in preventing and/or reducing the heating of the bone during the implantation process. Optionally, reduced heating of the bone may result in reduced bone tissue necrosis.

Alternatively, and/or additionally, in an embodiment, the enhanced fine threading profile may result in an increased surface area of the implant that the bone can build on and/or different areas and points in a larger area. Optionally, the thread lines 106 may provide a good grip in the bone. Alternatively, and/or additionally, in an embodiment, the bone may grow into the thread lines 106 overtime.

In some embodiments, the thread lines 106 may be beveled at various angles. Optionally, the thread lines 106 may stand out from and/or be indented into the fixture. For example, the flank angle of one side of the thread line 106 may range from 0 degrees to 30 degrees, and/or from 30 degrees to 60 degrees, and/or from 60 to 90 degrees, and/or the flank angle of the second side of the thread line 106 may range from 0 degrees to 30 degrees, and/or from 30 degrees to 60 degrees, and/or from 60 to 90 degrees.

Alternatively, and/or additionally, in an embodiment, the thread root 108 of a thread line 106 may have a width in the range from 0.0001mm to 1mm, and/or 1mm to 3mm, and/or 3mm to 5mm, and/or from 5mm to 10mm, and/or from 10mm to 30mm.

Alternatively, and/or additionally, in an embodiment, there may be various numbers of the thread lines 106. For example, the number of thread lines 106 in a fixture may range from 1 to 5, and/or between 5 to 10, and/or 10 to 30, and/or 30 to 50, and/or 50 to 100. In some embodiments, the one or more thread lines 106 may have the form of a complete or partial ring (e.g., completely or partially encircling the implant). Optionally, some and/or all thread lines 106 may be at various horizontal and/or vertical angles with respect to the axis of the implant. Alternatively, and/or additionally, in an embodiment, one or more thread lines 106 may be helical and/or oriented at various helix angles. For example, a thread line 106 may run horizontally around the fixture and/or may run at an angle between 0 degrees to 30 degrees, and/or between 30 degrees to 60 degrees, and/or between 60 degrees to 90 degrees (vertical). Alternatively, and/or additionally, in an embodiment, one or more thread lines 106 may run all around the fixture and/or partially around the fixture and/or may run at different horizontal angles at different points on the fixture.

In some embodiments, thread lines 106 may be of various heights about the minor diameter of the fixture. For example, a thread line may be raised between about 0.0001 mm to 1mm above the minor diameter of the fixture, between about 1 mm to 3mm above the minor diameter of the fixture, and/or between about 3mm to 5mm above the minor diameter of the fixture, and/or between about 5mm to 1cm above the minor diameter of the fixture. Alternatively, and/or additionally, in an embodiment, one or more thread lines 106 may be raised higher at certain points on the fixture and/or at other heights at other points on the fixture. Alternatively, and/or additionally, in an embodiment, thread lines 106 may be parallel to each other.

Alternatively, and/or additionally, in an embodiment, thread lines 106 may be of various distances one from the other. For example, parallel thread lines 106 may be between about 0.001mm to 1mm apart from each other, and/or 1mm to 3mm apart from each other, and/or 3mm to 5mm apart from each other, and/or between 5mm to 2cm apart from each other, and/or between 2cm to 10cm apart from each other.

Figure 3 is a schematic drawing illustrating an embodiment of the current invention. Optionally, the geometry of the threading lines 106 may potentially help prevent bone loss during the insertion process and/or may help reduce the scraping of the bone in the drilling process and/or may aid in the drilling process.

Alternatively, and/or additionally, in an embodiment, the flank angles of the screw thread of the implant may have different flank angles on the leading (apical) flank angle 302 and trailing (coronal) flank angle 304 and/or a reduced thread angle. For example, the leading flank angle may be less than the leading flank angle 302. For example, the leading flank may be perpendicular to the longitudinal axis of the implant (flank angle 0) 302 and/or the trailing flank angle 304 may be 30 degrees. For example, the leading flank angle 302 may be between 0 to 30 degrees and/or 30 to 60 and/or 60 to 90, and/or the trailing flank angle 304 may be between 0 to 30 degrees and/or between 30 to 60 degrees and/or between 60 to 90 degrees. Additionally, and/or alternatively, in an embodiment, the thread angle may be reduced from a standard screw (for example, the thread angle of a conventional may be 60 degrees and/or the thread angle of a of embodiments of the current invention may be 30 degrees). Additionally, and/or alternatively, in an embodiment, the fixture may have a reverse buttress thread.

In an embodiment, the threading profile may have an angle of 30 / 90 degrees so that it may lower the friction in the process of insertion into the bone and/or may distribute drilling forces over multiple thread lines 106. Optionally, the threading profile may result less heating and/or lower bone temperature. Optionally, the threading profile may thereby reduce the chance of necrosis.

For example, a leading flank angle 302 ranging from 0 to 45 degrees may aid to a slower drilling speed which may result in less heat and/or less chance of damage to the bone tissue and/or gum, and/or the bone may help to prevent bone loss in the drilling process.

For example, a threading profile built at an angle of 30 degrees in the trailing flank angle 304 and/or 0 degrees in the leading flank angle 302 may lower the friction in the process of insertion into the bone and/or may result in the temperature of the bone may not heat up and/or may reduce the chance of damage to bone tissue (necrosis).

Figure 4 is a flow chart illustrating an embodiment of the current invention. After the drilling process the grooves may enhance the initial gripping of the implant and/or may enhance the long-term gripping of the implant after healing.

For example, drill 402the dental implant fixture into the bone. Multiple threading lines on the fixture may result in slower drilling, and may distribute 404 the force over multiple thread lines, which may reduce 406 heat and/or reduce a chance of damage to the bone tissue which may result in a lower change of necrosis. The bone may be compressed 408 into the grooves deeper than the tread lines and/or may grow 412 into the grooves and/or thread lines, which may hold 410 the implant firmly in place.

Figure 5 is a block diagram illustrating an embodiment of the current invention. For example, the dental implant may comprise a fixture 502 comprising thread lines 506 and grooves 504. Optionally, the thread lines 106 may comprise a number of thread lines 524, which may have a leading flank angle 512 and a trailing flank angle 514. The many multiple thread lines 524, may distribute the drilling force, resulting in slower drilling and/or less heat and/or less chance of necrosis. Optionally, the grooves 504 may comprise a number of grooves 508, which may be deeper than the thread lines 506, and into which the bone may be compressed, and/or may enhance the long-term gripping of the implant after healing, and which may hold the implanted fixture 502 firmly in place.

GENERAL

It is expected that during the life of a patent maturing from this application many relevant building technologies, artificial intelligence methodologies, computer user interfaces, image capture devices will be developed and the scope of the terms for design elements, analysis routines, user devices is intended to include all such new technologies a priori.

As used herein the term “about” refers to ± 10%

The terms "comprises", "comprising", "includes", "including", “having” and their conjugates mean "including but not limited to".

The term “consisting of’ means “including and limited to”.

The term "consisting essentially of' means that the composition, method or structure may include additional ingredients, steps and/or parts, but only if the additional ingredients, steps and/or parts do not materially alter the basic and novel characteristics of the claimed composition, method or structure.

As used herein, the singular form "a", "an" and "the" include plural references unless the context clearly dictates otherwise.

Throughout this application, various embodiments of this invention may be presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention. Accordingly, the description of a range should be considered to have specifically disclosed all the possible subranges as well as individual numerical values within that range. For example, description of a range such as from 1 to 6 should be considered to have specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1, 2, 3, 4, 5, and 6. This applies regardless of the breadth of the range.

Whenever a numerical range is indicated herein, it is meant to include any cited numeral (fractional or integral) within the indicated range. The phrases “ranging/ranges between” a first indicate number and a second indicate number and “ranging/ranges from” a first indicate number “to” a second indicate number are used herein interchangeably and are meant to include the first and second indicated numbers and all the fractional and integral numerals therebetween.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination or as suitable in any other described embodiment of the invention. Certain features described in the context of various embodiments are not to be considered essential features of those embodiments, unless the embodiment is inoperative without those elements.

Although the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the appended claims.

All publications, patents and patent applications mentioned in this specification are herein incorporated in their entirety by reference into the specification, to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated herein by reference. In addition, citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art to the present invention. To the extent that section headings are used, they should not be construed as necessarily limiting.

Claims

WHAT IS CLAIMED IS:

1. A dental implant comprising a fixture having: a head portion located; and a body portion located apical to the head portion, wherein the body portion is apical to the head portion, and comprises: a plurality of thread lines separated by threat roots; and a groove, wherein the groove deeper than a nearest thread root.

2. The dental implant of claim 1, wherein the head portion has an indent configured for gripping with a screwdriver.

3. The dental implant of claim 1, wherein the body portion is tapered.

4. The dental implant of claim 1, wherein said thread roots start at an edge of said groove.

5. The dental implant of claim 1, wherein said thread roots start inside said groove.

6. The dental implant of claim 1, wherein the thread lines are beveled.

7. The dental implant of claim 5, wherein the thread lines have a leading flank angle between 30 to 60 degrees.

8. The dental implant of claim 5, wherein the thread lines have a trailing flank angle of between 40 to 60 degrees.

9. The dental implant of claim 5, wherein a difference between a trailing flank angle and a leading flank angle is between 50 to 75 degrees.

10. The dental implant of claim 1, wherein the plurality of thread lines includes between 3 to 10 lines.

11. The dental implant of claim 1, wherein the thread lines completely encircle the fixture.

12. The dental implant of claim 1, wherein the thread lines partially encircle the fixture.

13. The dental implant of claim 1, wherein the thread lines are parallel to each other.

14. The dental implant of claim 1, wherein the thread lines run at an angle between 10 degrees to 45 degrees around the fixture.

15. The dental implant of claim 1, wherein the thread lines have a width ranging from 1/100 mm to 10mm.

16. The dental implant of claim 1, wherein the thread lines are raised between about 1/100 mm to 5mm above the minor diameter of the fixture.

17. The dental implant of claim 1, wherein of thread lines are between 1/lOOmm to 5mm apart from each other.

18. The dental implant of claim 1, wherein the groove is beveled.

19. The dental implant of claim 17, wherein a second flank angle is between 30 to 60degrees.

20. The dental implant of claim 1, including between 1 to 30 of said grooves.

21. The dental implant of claim 1, wherein the groove completely encircles the fixture.

22. The dental implant of claim 1, wherein the groove partially encircle the fixture.

23. The dental implant of claim 1, wherein including a plurality of the grooves.

24. The dental implant of claim 23, wherein the grooves run parallel to each other.

25. The dental implant of claim 1, wherein of grooves run perpendicular to an axis of the fixture.

26. The dental implant of claim 1, wherein the groove runs at an angle of between 5 to 25 degrees to an axis of the fixture.

27. The dental implant of claim 1, wherein the groove runs at an angle of between 25 to 65 degrees to an axis of the fixture.

28. The dental implant of claim 1, wherein the grooves runs at an angle of between 65 to 90 degrees to an axis of the fixture.

29. The dental implant of claim 1, wherein the groove has a width ranging from 1/10 mm to 2 mm.

30. The dental implant of claim 1, wherein the grooves have a depth of between 1/10 mm to 3 mm deeper than a minor diameter of the fixture.

31. The dental implant of claim 1, including multiple grooves between 1/10 mm to 5mm apart from each other.

32. A method of fixing a dental implant comprising: screwing a fixture into a bone; distributing forces of the screwing over a plurality of thread lines on a body of the fixture; compressing a bone into a groove on the body of the fixture said groove being deeper than the minor diameter of the fixture; and holding the fixture in position with the bone.

33. The method of claim 32, wherein said compressing and said holding is via elastic forces.

34. The method according to claim 32, further comprising: reducing heat from the screwing via spreading said screwing forces over the plurality of thread lines on the body of the fixture.

35. The method according to claim 34, wherein said reducing the heat also reduces bone tissue necrosis.

36. The method according to claim 32, wherein said compressing the bone into said groove on the body of the fixture fixes the fixture in place.

37. The method according to claim 32, further comprising growing bone into said groove on the body of the fixture.

38. The method according to claim 32, further comprising growing bone into said plurality of thread lines on the body of the fixture, fixing the fixture in place.