WO1995005784A1 - Materiel ancillaire de pose d'une instrumentation rachidienne - Google Patents
Materiel ancillaire de pose d'une instrumentation rachidienne Download PDFInfo
- Publication number
- WO1995005784A1 WO1995005784A1 PCT/FR1994/000887 FR9400887W WO9505784A1 WO 1995005784 A1 WO1995005784 A1 WO 1995005784A1 FR 9400887 W FR9400887 W FR 9400887W WO 9505784 A1 WO9505784 A1 WO 9505784A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- action ends
- action
- equipment according
- branch
- maintaining
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
- A61B17/7077—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
Definitions
- An ancillary instrument for fitting a spinal instrumentation implanted such as osteosynthesis device 1, an intervertebral device processing instabilities or dynamic orthesis implanted correction, or the like.
- the curvature of the stems essentially determined as a function of the lateral deviation to be corrected does not necessarily correspond to an appropriate correction of the kyphosis or lordosis.
- these devices are considered to be among the most sophisticated and rigid. As a result, their installation remains delicate due in particular to the instability of the hooks during corrective maneuvers.
- two other types of osteosynthesis devices are essentially used to treat deformities of the vertebral column. These are, on the one hand, Roy-Camille's plate and pedicle screw devices and their improvements, and, on the other hand, Luque or Dove devices with sub-son and their improvements. Roy-Camille's devices are reserved for small amplitude corrections concerning a limited number of vertebrae, and do not allow efficient derotation. Luque or Dove devices can cause serious neurological complications due to the passage of the wires under the vertebral lamina near the spinal cord. All these devices also do not provide a satisfactory solution for reducing deformation.
- intervertebral elastic to treat lumbar degenerative instabilities.
- These devices generally consist of intervertebral ligaments or springs, sometimes accompanied by wedges interposed between the spinous processes or between intrapedicular screws. These ligaments or springs exert traction forces tending to bring the vertebrae closer and to reduce their relative mobility. To facilitate the installation of these devices and allow better precision of the adjustments, it would be desirable to be able to exert and measure the correction forces before and during the installation of these devices by separate equipment.
- ancillary equipment suitable for fitting new dynamic orthoses which preserve the natural physiological mobility of the vertebrae and include elastic return means which must be placed taut and which must have characteristics determined during the po ⁇ e for the reduction of the deformation and / or of the forces to be corrected.
- Voluminous external materials are also known for reducing scoliotic deformations consisting of harnesses and / or halos and / or belts associated with detrimental devices (motors, weights, etc.). These materials are not very precise, are not flexible to use, and do not allow a significant and precise correction of the positions of the vertebrae in the three dimensions.
- the invention therefore aims to overcome these drawbacks and to propose ancillary equipment making it possible to correct and / or maintain with great precision and in three dimensions the shape and / or the forces exerted between the vertebrae before and during the placement of an implanted spinal instrumentation.
- the invention also aims to provide ancillary equipment allowing the installation of an implanted dynamic orthosis.
- the invention also aims to propose ancillary equipment which makes it possible to measure the displacements and the forces necessary for maintaining the correction and which will therefore be imposed on the instrumentation placed on osteosynthesis or dynamic orthosis.
- the invention also aims to propose ancillary equipment which is simple in its structure and its use and compact with respect to the operating field.
- the invention relates to ancillary equipment making it possible to exercise and maintain stresses on a portion of the spine in order to correct and / or maintain the shape and / or the forces exerted on the vertebrae before and during placement of an implanted spinal instrumentation, comprising at least two action ends intended to cooperate respectively with two distinct vertebrae, characterized in that it comprises means for modifying and maintaining the relative positions of the action ends according to at least three orthogonal directions, by modifying and maintaining the relative position of each action end in at least one of these directions.
- the ancillary equipment has three action ends intended to cooperate respectively with three distinct vertebrae. More particularly, the means for modifying and maintaining the relative positions of the action ends compel the first two action ends to move in translation in a direction, passing through these action ends, which remains perpendicular to the same plane, and the third action end interposed between the first two action ends to move in the plane perpendicular to the direction passing through the first two action ends.
- the means for modifying and maintaining the relative positions of the three action ends comprise means for varying the distance separating said two first action ends and means for moving said third action end in translation along two directions perpendicular to the direction passing through said two first action ends.
- said action ends are action ends of branches articulated to each other or to a common support.
- the ancillary equipment comprises at least three articulated branches each comprising an action end and at least three orthogonal control rods two by two and associated with the articulated branches to modify and maintain the relative positions of their ends of action.
- each control rod comprises an axial stop cooperating with a branch, at least one thread cooperating with a thread integral with at least one other branch, or of another control rod, or of a support. branch, to allow a modification in axial translation and "maintaining the distance of the branch cooperating with the stopper with respect to the other branch (es) or to the other control rod or to the support of branch.
- Each control rod of ancillary equipment according to the invention is provided with an operating handle allowing in particular to actuate it in rotation for the modification of the relative positions of the corresponding action ends.
- the ancillary equipment comprises dynamometric means for measuring the forces imparted on the action ends to maintain their relative positions, and means for measuring the displacements of the action ends when their positions are modified. relative.
- the invention also relates to an ancillary material comprising in combination all or part of the features mentioned above or below.
- FIG. 1 is a diagrammatic rear view of an ancillary clamp according to the invention
- FIG. 2 is a diagrammatic view in section along line II-II of FIG. 1,
- FIGS. 3 to 6 are schematic views illustrating several successive steps of fitting a dynamic orthosis implanted with ancillary clamps according to the invention.
- the term “vertical” designates the axial direction of the spinal cord which does not correspond to the absolute vertical direction since the spinal cord has a curvature (kyphosis and lordosis).
- the term “horizontal” designates any direction contained in the plane perpendicular to the vertical direction
- the term “sagittal” designates any plane containing the vertical and horizontal anteroposterior directions
- the term “frontal” designates any plane containing the vertical directions and lateral horizontal.
- Figures 1 and 2 show an ancillary forceps according to the invention allowing in particular the installation of an implanted dynamic vertebral orthosis.
- This clamp has three action ends 4, 5, 6 intended to cooperate respectively with anchoring elements 1, 2, 3 of 1Orthesis on the vertebrae.
- Each of the action ends 4, 5, 6 of the clamp is formed of a stud intended to be engaged in a vertical axis bore formed in the vicinity of the coupling means of 1 Orthosis to the anchoring elements 1, 2, 3
- Each nipple 4, 5, 6 which can be oriented downwards or upwards (figure 1) can act in compression or detraction as required.
- each anchoring element 1, 2, 3 comprises a bore formed through a horizontal extension of the anchoring element which supports a cylinder for coupling a rod 8a, 8b of the orthosis.
- the drilling is preferably arranged on the front and lateral side of the cylinder so as to allow the fitting and removal of the rod 8a, 8b while the clamp is associated with the anchoring elements.
- the clamp also includes dynamometric means 9, 10, 11 for measuring the forces imparted on the end studs 4, 5, 6 to maintain their relative positions.
- the clamp comprises means 12, 13, 29 for measuring the displacements of the end studs 4, 5, 6 during modifications of their relative position.
- Each clamp is made up of three branches
- the clamp comprises an upper branch 15 carrying an upper end stud 4, a lower branch 16 carrying a lower end stud 5 , and a median branch 17 carrying a median end nipple 6 interposed between the upper nipples 4 and lower 5.
- These nipples 4, 5, 6 -in particular the median nipple 6 may include a terminal nut in order to stabilize it on the corresponding anchor.
- the two upper and lower branches 15, 16 are articulated to each other about a horizontal axis 18 orthogonal to the direction passing through the two upper and lower pins 4, 5.
- the branches 15, 15, 16 are articulated to each other about a horizontal axis 18 orthogonal to the direction passing through the two upper and lower pins 4, 5.
- a vertical control rod 19 has a thread 25 cooperating with a thread 26 at one end 45 in the form of a sleeve of the lower branch 8
- the end 27 of the upper branch 15 opposite the stud 4 is in the form of a sliding sleeve around a cylinder 28 integral with the vertical control rod 19 but whose position in translation relative to the rod 19 can be adjusted using locking screws 48.
- This sleeve 27 is trapped between two compression springs 31 bearing at their opposite ends on dynamometric sensors 9 carried by the cylinder 28 and therefore by the vertical control rod 1 9.
- the springs 31 and the sensors 9 thus form an axial abutment in both directions for the end 27 of the upper branch 15 relative to the control rod 19.
- the sleeve 27 also includes a slot 30 allowing the reading of a scale graduated 12 engraved on the cylinder 28 integral with the rod 19.
- the sleeves 45, 27 at the end of the lower 16 and upper 15 branches cooperating with the vertical control rod 19 are art iculated on these branches 16, 15 about an axis 47, respectively 46, parallel to the axis 18 of articulation of the branches 16, 15 between them.
- the end studs 4, 5 are spaced apart or brought closer to one another. If the pins 4, 5 do not support forces in the vertical direction, the upper sleeve 27 remains midway between the two sensors 9, the springs 31 not being activated. s on the contrary a force is necessary to move the pins 4, 5.
- one of the springs 31 is activated in compression to balance this force and allow the position to be modified.
- One of the load cells 9 then delivers an electrical signal proportional to this force.
- the middle branch 17 is articulated on the assembly thus formed by the upper 15 and lower branches 16.
- a sagittal control rod 20 extends along the axis 18 of articulation of the two upper and lower branches 15, 16 in the direction sagittal.
- This rod 20 is provided, at its end, with a thread 33 engaged in a thread 34 of one of the branches 15, 16.
- the rod 20 also carries a graduated scale 13 allowing to identify its position relative to the branches 15, 16.
- the terminal nut 52 of this rod 20 can be removed for the disengagement of this rod 20 allowing to dismantle the branch 17 if necessary.
- the middle branch 17 has an oblong slot 35 traversed by the control rod 20.
- This oblong slot 35 extends in a direction orthogonal to the vertical direction passing through the end pins 4, 5 upper and lower, and to the horizontal axis 18 of articulation of the two upper and lower branches 15, 16.
- the oblong opening 35 of the middle branch 17 is crossed by the sagittal control rod 20 which is trapped between two springs 36 whose opposite ends bear on dynamometric sensors 10 carried by the rod 20.
- the springs 36 and the sensors 10 form a axial stop in both directions for the middle branch 17 relative to the-. - sagittal control rod 20.
- dynamometric sensors 10 provide a measurement of the forces imparted to the stud 6 in the horizontal sagittal direction.
- the position of the middle branch, and therefore of the middle stud 6, is therefore modified in the horizontal sagittal direction relative to the frontal plane containing the upper and lower studs 4, 5.
- the end 37 of the middle branch 17 opposite the end stud 6 is associated with a front control rod 21 which makes it possible to control the movements of this middle branch in the horizontal frontal direction perpendicular to the vertical direction passing through the studs d ends A, 5 upper and lower and to the axis 18 of articulation of the two arms 15, 16 upper and lower.
- This front control rod 21 has a threaded end 38 engaged in a thread 39 formed in a bearing 40 comprising a cylinder 41 incurring the vertical control rod 19.
- the cylinder 41 carries a graduated scale 29 visible through a light 42 of the branch median 17.
- the end 37 of the middle branch 17 opposite the stud 6 slides around the front control rod 21 and is trapped between two springs 43, the opposite ends of which press on load cells 11 carried by the rod 21.
- the springs 43 and the sensors 11 form therefore an axial stop in both directions for the end 37 of the middle branch 17 relative to the front control rod 21.
- the displacement of the middle branch 17 in the horizontal frontal direction relative to the sagittal control rod 20 is authorized by virtue of the oblong opening 35.
- the vertical control rod 19 crosses the middle branch 17 through an oblong opening 49 arranged axially in this branch 17 to allow relative movements in the horizontal frontal direction.
- the handle 24 By turning the handle 24, the position of the central stud 6 in the frontal direction is therefore modified relative to the sagittal plane containing the upper and lower studs 4, 5.
- One of the sensors 11 provides a measurement of the forces necessary for this displacement.
- the branch 17 can be dismantled.
- the light 49 is closed by a removable rear flap 50 blocked by a screw 51. By removing the flap 50, the rod 19 can be removed from the light 49.
- the front 21 and sagittal rods 20 are then completely unscrewed, which frees the branch 17.
- the vertebrae intended to receive the anchoring elements 1, 2, 3 are discovered, the anchoring elements 1 are placed and fixed, 2, 3 on each vertebra concerned and bilaterally (FIG. 3), at least one ancillary clamp according to the invention is associated with the anchoring elements 1, 2, 3 of each vertebra to be moved for the desired correction, and in particular a clamp for each rod 8a or 8b which must be placed (FIG.
- FIGS. 3 to 6 the clamp placed on the right of the spinous processes is similar to that described and represented in FIGS. 1 and 2, and the clamp placed on the left is reversed, the upper branch 15 being associated with the anchoring elements 2 lower and the lower branch 16 being associated with the upper anchoring elements 1.
- the dimensions and the shape of the branches 15, 16 used as well as the orientations of the end studs 4 and 5 are chosen as a function of the distance between the corresponding vertebrae.
- the deformation and / or the forces are therefore corrected by means of the ancillary clamps entirely before associating the means for retaining and / or elastic return (rods and springs), and this unlike known osteosynthesis devices with which the correction is carried out by or with the stiffening elements of the vertebrae.
- the holding forces are measured by dynamometric sensors 9, 10, - 11 secured to the ancillary equipment, that is to say along three orthogonal axes of translation of the end studs 4, 5, 6, namely a vertical axis (vertical control rod 19), a sagittal axis (sagittal control rod 20), and a front axis (front control rod 21).
- the different characteristics and dimensions of the retaining means and / or return means elastic of the orthosis are determined, at least approximately, by calculation by an information processing device programmed for this purpose from the values of the holding forces measured by the various load cells.
- the desired efficiency of the means of retaining and / or elastic return of 1 Orthosis is checked before the ablation of the clamps by reading the cancellation of the static forces recorded by the dynamometers 9, 10, 11.
- the means of maintaining and elastic recall of the orthosis are then and if necessary adjusted or changed in whole or in part.
- the ancillary forceps according to the invention described above therefore make it possible to correct the shape and / or measure the forces exerted on the vertebrae before and during the fitting of the orthosis.
- the clamps are associated with the anchoring elements 1, 2, 3, they can be adjusted during the operation. Also, it should be noted that they make it easy to place or remove the orthosis (rods 8a, 8b and springs 44), and also to adjust the characteristics of 1 Orthosis until the forces of support supported by the clamps themselves.
- the ancillary clamps are removed, the dynamic orthosis therefore exerts the efforts necessary to correct the shape and / or the forces necessary to maintain the portion of the instrumented spine.
- the ancillary forceps according to the invention make it possible to instrument five vertebrae by acting on three vertebrae of the corresponding portion of the spine.
- the shape and dimensions of the clamps can be adapted so that they can be associated with a different length of spine.
- five vertebrae for example can be instrumented using on the three central vertebrae a clamp with three branches and on the two extreme vertebrae a clamp with two branches (from which the central branch will have been removed) which acts "in bridge" on the first.
- the pliers 1 3 ancillaries according to the invention can be used not only for correcting scoliosis, but also for fitting any other spinal instrumentation, and in particular for treating congenital or acquired spinal deformities, cervical, dorsal, or lumbar, or post-traumatic, tumor, infectious, degenerative or other spinal instabilities.
- ancillary pliers can allow
- ... 1 place an orthosis or any other spinal instrumentation allowing the vertebral joints to be unloaded for the treatment of degenerative instability.
- the ends of these clamps will be modified so as to adapt to the anchoring material concerned in order to achieve the desired vertebral correction before insertion connecting material which is used to maintain the position obtained.
- the ancillary equipment according to the invention can also be produced not in the form of a clamp, but also in the form of a frame or a support on which the branches are articulated while being able to slide.
- the number of branches can be different from three, depending on the needs.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002170277A CA2170277C (fr) | 1993-08-27 | 1994-07-15 | Materiel ancillaire de pose d'une instrumentation rachidienne |
EP94922925A EP0715506A1 (fr) | 1993-08-27 | 1994-07-15 | Materiel ancillaire de pose d'une instrumentation rachidienne |
AU72660/94A AU7266094A (en) | 1993-08-27 | 1994-07-15 | Ancillary equipment for fixing rachidian instrumentation |
US08/605,036 US5704937A (en) | 1993-08-27 | 1994-07-15 | Operative equipment for fixing spinal instrumentation |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9310291A FR2709245B1 (fr) | 1993-08-27 | 1993-08-27 | Orthèse vertébrale interne dynamique. |
FR93/10291 | 1993-08-27 | ||
FR94/01440 | 1994-02-07 | ||
FR9401440A FR2709248B1 (fr) | 1993-08-27 | 1994-02-07 | Matériel ancillaire de pose d'une instrumentation rachidienne. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995005784A1 true WO1995005784A1 (fr) | 1995-03-02 |
Family
ID=26230570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1994/000887 WO1995005784A1 (fr) | 1993-08-27 | 1994-07-15 | Materiel ancillaire de pose d'une instrumentation rachidienne |
Country Status (6)
Country | Link |
---|---|
US (1) | US5704937A (fr) |
EP (1) | EP0715506A1 (fr) |
AU (1) | AU7266094A (fr) |
CA (1) | CA2170277C (fr) |
FR (1) | FR2709248B1 (fr) |
WO (1) | WO1995005784A1 (fr) |
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US8702759B2 (en) | 2007-04-17 | 2014-04-22 | Gmedelaware 2 Llc | System and method for bone anchorage |
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Also Published As
Publication number | Publication date |
---|---|
AU7266094A (en) | 1995-03-21 |
CA2170277C (fr) | 2006-01-10 |
EP0715506A1 (fr) | 1996-06-12 |
US5704937A (en) | 1998-01-06 |
FR2709248B1 (fr) | 1995-09-29 |
FR2709248A1 (fr) | 1995-03-03 |
CA2170277A1 (fr) | 1995-03-02 |
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