FR3002842A1 - ROTARY AND / OR VIBRANT SURGICAL INSTRUMENT FOR DISPENSING FLUID, FLUID SUPPLY DEVICE AND CORRESPONDING INSTRUMENT EQUIPMENT - Google Patents

Abstract

The invention relates to a rotary and / or vibrating surgical instrument (3) comprising: - a blade (31) comprising a first end portion forming the tail, and a second end portion forming the active portion (310) of the instrument, - a handle (32) surrounding said tail, and adapted to be inserted into an instrument holder to be held therein, said blade (31) comprising a slotted portion, extending over at least a portion of its active portion (310) and / or on at least a portion of its tail, the cross section of said blade at its split portion being formed of at least two subsections separated by a slot (311), said rotary surgical instrument and / or vibrator (3) also comprising a plastic material (312) overmolded in said slot (311), so as to at least partially fill said slot (311) on at least a portion of said slotted portion.

Description

BACKGROUND OF THE INVENTION The present invention relates to a rotary and / or vibrating surgical instrument adapted to deliver a fluid, a fluid supply device and corresponding instrument-carrying equipment. fluid. It relates more particularly to rotary and / or vibrating instruments of dental surgery. The invention also relates to a fluid supply device, and an instrument-holder equipment adapted to receive such an instrument and to drive it in rotation and / or vibration which comprises such a fluid supply device. 2. PRIOR ART Various types of rotary and / or vibrating instruments are used by surgeons, and in particular by dentists. In particular, dentists very commonly use a wide range of rotary and / or vibrating instruments which are usually worn by instrument-carrying equipment usually called a contra-angle. This contra-angle comprises a handle for holding by the practitioner and a contra-angle head in which can be inserted and maintained the handle of an instrument chosen by the practitioner. The contra-angle head can then drive the instrument, at the discretion of the practitioner, in a continuous or alternating rotational movement, and / or axial or radial vibration. Among the various types of rotary and / or vibrating instruments, reclosed instruments allowing the passage of a fluid, for example for irrigation, are known, in particular from the French patent application FR 2 964 851 in the name of the applicant. of the cavity in which the instrument is rotated and / or vibrated. However, the implementation of such instruments presents difficulties. Thus, when the blade of such an instrument is recessed to allow the passage of a fluid, it may have insufficient rigidity or strength to allow proper retention of the blade by a handle of the instrument. In addition, the guiding of the fluid in the instrument may not be sufficiently precise, and cause a dispersion of most of the fluid in areas where it is unnecessary.

Finally, the fluid supply of the instrument can not easily be implemented with the equipment usually provided by practitioners. Indeed, the contra-angles usually used by practitioners, and in particular by dentists, are generally not equipped with fluid supply means of the instrument. Feeding means that are sometimes used are often expensive and impractical. Thus, some instrument holders, which are used in dental implantology, are sometimes equipped with a supply line capable of conveying a fluid into the opening of an axial pipe of the instrument, at the end of the handle. the instrument. Such equipment, such as the one presented in EP 0 374 276, is particularly expensive. As a result, only dentists practicing implantology are equipped with it. OBJECTIVES OF THE INVENTION The present invention aims to overcome these disadvantages of the prior art. The invention particularly aims, according to at least one of its embodiments, to allow the manufacture of a rotary and / or vibrating surgical instrument, allowing the mastered distribution of fluid, which is particularly robust, effective and little expensive to manufacture, while maintaining the cutting properties, without any other necessary modification (addition of abrasive, etc.). According to some of its embodiments, another object of the invention is to enable surgeons, and in particular dentists, to use rotating and / or vibrating fluid-powered instruments carried by conventional instrument holders, not including not necessarily an internal fluid supply line. Another object of the invention is to provide surgeons, and in particular dentists, instruments whose use is easy and intuitive 4. Description of the invention These objectives, as well as others which will appear more clearly thereafter are achieved with the aid of a rotary and / or vibrating surgical instrument comprising: - a blade comprising a first end portion forming the tail, and a second end portion forming the active portion of the instrument; a handle surrounding said tail, and adapted to be inserted into an instrument holder to be held therein, said blade comprising a split portion, extending over at least a portion of its active portion and / or at least a portion of its tail, the cross section of said blade at its slotted portion being formed of at least two subsections separated by a slot. According to the invention, said rotary and / or vibrating surgical instrument also comprises a plastic material overmolded in said slot, so as to at least partially fill said slot, on at least a portion of said slotted portion. The overmolded plastic material stiffens and solidifies the surgical instrument, including the tail of the blade, which must be rigid enough to be effectively maintained by the handle. It also makes it possible to ensure a more efficient guiding of fluid in the instrument, for example by defining a fluid inlet opening in the instrument. The overmolded plastic material may be constituted by any injectable, moldable or overmoldable material, such as for example a plastic material or a resin. Advantageously, the plastic material fills said slot so as to connect together said subsections of the entire slotted portion located at said tail. The different subsections of the instrument are thus secured to each other, which ensures a better rigidity of the tail of the instrument, which can thus be maintained in a handle more efficiently and securely. It is not necessary, however, that the slot is completely filled: there may indeed be cavities, for example pipes, formed in the slot, in said plastic material.

Preferably, an inner pipe extending substantially longitudinally in said blade is formed in said plastic material overmolded in said slot, on at least a portion of said slotted portion. This conduit allows a more efficient distribution of the fluid flowing in the instrument, which can be guided to the desired level of the instrument.

Advantageously, in this case, an inner pipe extending substantially transversely in said blade is formed in the plastic material overmolded in said slot, between said inner pipe extending substantially longitudinally and a lateral feed opening. The lateral feed opening, which may for example be provided in the handle of the instrument, allows to feed the instrument fluid without having to access the end of the instrument inserted into the instrument holder. According to another possible embodiment, the inner pipe extending substantially longitudinally in the blade can extend to the end of the tail, to an axial feed opening that can be provided at the end of the handle . According to a possible embodiment of the invention, said handle is constituted by a reported metal sleeve surrounding said tail. According to possible variants of this embodiment, said insert insert, surrounding said tail, may be a plastic or metal-plastic sleeve. According to another possible embodiment, said handle is constituted by a plastic material overmolded on said tail. In the latter case, the manufacture of the instrument is thus less expensive and more efficient.

The present invention also relates to a device for supplying fluid to a rotary and / or vibrating surgical instrument having a lateral feed opening, comprising: - a feed connector, having a central through hole capable of surrounding a portion of the rotary and / or vibrating surgical instrument for supplying fluid to said lateral opening of said rotating and / or vibrating surgical instrument; a support intended to be placed in front of the opening of an instrument holder intended to receive said rotary and / or vibrating surgical instrument, said support comprising a support housing of said supply connector, said housing having openings allowing the passage of said instrument through said housing; characterized in that the respective dimensions of said power connector and said housing, and / or the flexibility of the material constituting the power connector, allow relative movement of said connector in said housing. Thus, the power connector is held in place to supply the surgical instrument with fluid. The clearance, or relative displacement of the connector in the housing, however, allows a perfect centering of the power connector on the opening of the instrument holder for receiving said rotary and / or vibrating surgical instrument, this centering being achieved by the instrument itself. This good centering avoids excessive friction and stress when the instrument is rotated, continuous or alternated, by the instrument holder. The invention also relates to an instrument-carrying equipment comprising an instrument holder associated with a fluid supply device as described above. According to an advantageous embodiment, said support of said supply device is removably mounted on said carrier. The instrument-carrying equipment can thus be implemented from a large number of different types of instrument holders, such as the known instrument holders of the prior art, as long as a support device support device is suitable for these carriers.

According to another advantageous embodiment, said support of said feed device is fixedly mounted on said carrier. This support can thus be manufactured integrally with one of the parts of the instrument holder, in particular a contra-angle head.

Such an instrument-carrying equipment is easier to implement for the practitioner, who does not have to put in place the support on the instrument holder. It also has a small footprint. 5. List of Figures Other features and advantages of the invention will appear more clearly on reading the following description of preferred embodiments of the invention, given by way of illustration and not limitation, and accompanied by figures among which FIGS. 1 and 2 are two perspective views of a contra-angle head equipped with a feeding device according to one embodiment of the invention and carrying a rotary and / or vibrating instrument according to a method of embodiment of the invention; FIGS. 3 and 4 are respectively a cutaway perspective view and a section of the contra-angle head, of the feed device and of the rotary and / or vibrating instrument of FIGS. 1 and 2; - Figures 5 and 6 are respectively a perspective view and a side view of a support jumper of the feeder of Figure 1; - Figures 7 and 8 are respectively a perspective view and a sectional view of the power connector of the feeder of Figure 1; FIG. 9 is a partial perspective view of a rotary and / or vibrating instrument according to a first embodiment of the invention, which can be used in the contra-angle head of FIGS. 1 to 4; FIG. 10 is a partial perspective view of the rotary and / or vibrating instrument of FIG. 9, the handle of which has been removed; - Figures 11 and 12 are two perspective views of the rotary and / or vibrating instrument of Figure 9, cut transversely; FIG. 13 is a side view of a rotary and / or vibrating instrument according to a second embodiment of the invention, which can be used in the contra-angle head of FIGS. 1 to 4; FIG. 14 is a partial perspective view of the rotary and / or vibrating instrument of FIG. 13, cut longitudinally; FIG. 15 is a partial perspective view of the rotary and / or vibrating instrument of FIG. 13 cut longitudinally along a plane perpendicular to the sectional plane of FIG. 14. DESCRIPTION OF EMBODIMENTS OF THE INVENTION 5.1 Instrument-carrying equipment FIGS. 1 to 4 show a contra-angle head 1 which carries a rotary and / or vibrating surgical instrument 3 according to one embodiment of the invention, and which is equipped with a feeding device 2 according to one embodiment of the invention, for supplying fluid to the rotary surgical instrument 3. The contra-angle head The contra-angle head 1 is an instrument holder well known to those skilled in the art , having conventionally a head neck 11 at the end of which is a head body 12 having a push-button 13. The head body 12 has, at its end opposite the push-button 13, an opening allowing the introduction of the handle a rotary and / or vibrating instrument. In the head body 12, a suitable mechanism, known to those skilled in the art, allows to retain the handle, as long as it is not released by pressing the push button 13, and to drive it into position. rotation and / or vibration.

The contra-angle head 1 is of a conventional type, well known to those skilled in the art. Its mechanism is therefore not described in more detail. 5.2 The rotary and / or vibrating surgical instrument - first embodiment In FIGS. 1 to 4, a rotary and / or vibrating surgical instrument 3 according to a first embodiment of the invention is inserted into the opening of the body of the head 12. This rotary and / or vibrating instrument 3 is partially represented by FIGS. 9 to 12. It is composed of a metal blade 31 whose end portion, called the tail, is fitted into a handle 32, for example according to the method described in document FR 2 955 244 in the name of the applicant. The other end (not shown) of the blade 31 is the tip of the instrument. The portion of the blade 31 located between this point and the handle 32 constitutes the active portion 310 of the instrument. The handle 32 In this embodiment, the handle 32, substantially cylindrical, is constituted by an insert sleeve, metal or plastic material, or metal-plastic material, which has a diameter adapted to be inserted into the head body 12 As shown in FIG. 9, its end forming the end of the instrument has a peripheral groove 321 and a flat part 322 making it possible, in a known manner, to hold the handle 32 in the head body 12. This handle 32 has a length greater than the depth of the opening of the head body 12. A portion 33 of the handle, located near the active portion 310 of the instrument, therefore extends under the head body 12 when the instrument is inserted in this head body. This portion 33, which advantageously has a cylindrical shape of outside diameter similar to that of the rest of the handle 32, constitutes a fluid supply portion of the instrument, having at least one cutout 334 forming a fluid supply opening. The rotary instrument 3. The blade 31 The instrument 3 shown in FIGS. 9 to 12 is designed so that its active portion 310 can dispense a fluid. Thus, it can advantageously be an instrument of the type described in the patent application FR 2 964 851 in the name of the applicant. Its blade 31 thus has a helical through slot 311, extending in a substantially longitudinal direction of the instrument, and allowing the circulation and distribution of fluid along the active portion 310. As shown in particular in Figures 11 and 12 , the cross section of the blade, at its split portion, is formed of at least two subsections separated by a slot. As shown in particular in Figure 10, this slot 311 is open on the periphery of the blade, at the largest part of the active portion 310, to allow the distribution of the fluid. On the other hand, it is at least partially blocked by a molded plastic material 312, at the portion of the active portion 310 that is closest to the tail, and at the tail of the blade 31. Thus, the slot 311 is not open at this tail, which is thus more rigid. Holes formed in this plastic material, however, allow the circulation of fluid in the blade 31. Thus, a transverse feed pipe 341 passes right through the tail of the blade 31, at the cutouts 334 of the handle 32. Preferably , as shown in FIG. 11, three cutouts 334 are distributed over the perimeter of the handle 32, so that at least one of these cuts is opposite one of the ends of the pipe 341. Thus, the fluid arriving in these cuts can be routed in line 341, regardless of the relative orientation of the blade and the handle.

A longitudinal supply duct 342 communicates on the one hand with the duct 341 and on the other hand with uncapped portion of the slot 311 in the active portion 310 of the blade 31. Thus, the ducts 341 and 342 make it possible to route towards the open portion of the slot 311 the liquid that arrives through the cutouts 334 of the handle 32.

The plastic material 312 which is overmolded in the slots of the instrument 3 may also serve to give an indication to the practitioner of the instrument. Indeed, this plastic material is visible to the practitioner, at the portion of the active portion 310, which is closest to the handle 32, even when the instrument is in place in the instrument holder. The color of this plastic material 312 may be chosen according to a color code known to the practitioner, so that the latter can immediately recognize the characteristics of the instrument 3 (for example the length of the active portion, the diameter to the tip of the active portion, etc.), even when it is inserted into the contra-angle head 12. This use of special color plastic for overmoulding can also be used in the other embodiments. 5.3 The Rotating and / or Vibrating Surgical Instrument - Second Embodiment FIGS. 13 to 15 show a rotary and / or vibrating surgical instrument 4 according to a second embodiment of the invention, which can also be used in the counter head -angle 1, with the feed device 2. This rotary and / or vibrating instrument 4 is composed of a blade 41 whose end portion called the tail is fitted into a handle 42. The portion that is not fitted in the handle 42 forms the active portion of the instrument itself constituted by a cut portion 412, near the tip 413, having a cutting edge and a uncut portion 414, not cutting, near the handle 42. Other possible embodiments of the active portion may comprise a succession of alternating cut and uncut portions, or only the presence of a cut portion or only of an uncut portion.

The blade 41 has a through-slot 411, helical, extending in a substantially longitudinal direction over a portion of the active portion. Thus, the cross section of the blade, at its split portion, is formed of at least two subsections separated by at least one slot. It should be noted that in other possible embodiments, the slot may have other shapes than the helical shape. It can thus have irregularities to allow better adhesion of the overmolded plastic material. It may also, for example, have a "stepped" shape, comprising segments extending in the longitudinal direction and segments extending in transverse planes. Such a shape, especially in the uncut portion 414, may for example serve as a length marker for the practitioner who uses the instrument. It can thus know the spacing between the different segments extending in transverse planes, and use it as a reference for calculating the depth of insertion of the tool into a cavity. In this embodiment, the handle 42 is formed of a plastic material overmolded on the tail of the blade 41, and having a suitable shape. The handle 42 advantageously has a length greater than the depth of the opening of the head body 12. A portion 43 of the handle, located near the active portion of the instrument, therefore protrudes under the head body 12 when the instrument 4 is inserted into this head body and constitutes a fluid supply portion of the instrument. As in the embodiment shown in FIGS. 9 to 12, this plastic material also plugs the slot extending into the tail of the instrument and a portion of the slot extending into the active portion of the blade 41. holes formed in this plastic material, however, allow the circulation of fluid in the blade 41. Thus, a transverse feed line 441 passes right through the tail of the blade 41 and the plastic handle 42, at the portion of the blade. fluid supply 43. A longitudinal supply line 442 communicates on the one hand with the pipe 441 and on the other hand with uncapped portion of the slot 411 in the active portion of the blade 41. Thus, the pipes 441 and 442 enable the liquid which arrives through the ends of the pipe 441 to be conveyed towards the open part of the slot 411. 5.4 Device for supplying fluid According to one embodiment of the invention, a fluid supply device 2 is associated with the contra-angle head 1 to allow the fluid supply of the rotary and / or vibrating instrument 3. Thus, the contra-angle head 1 and the fluid supply device 2 together form a device for instrument capable of supplying fluid to a rotary and / or vibrating surgical instrument. In the embodiment shown, the supply device comprises a support jumper 21 carrying a power supply connector 22.

The support jumper The support jumper 21 is shown in more detail in FIGS. 5 and 6. It comprises elements allowing it to be secured to the head body 1, which here consist of an elastic clamp 210 able to grip the collar of the head. head 11 to attach the jumper 21 to the contra-angle head 1, and a centering edge 211 to center the jumper 21 relative to the head body 12. The jumper 21 can thus be assembled very easily to the head of contra-angle 1. It should be noted that many models of riders of similar supports, having various securing means, can easily be imagined by those skilled in the art to adapt to the many models of contra-angle heads which are usually used by practitioners. The support jumper 21 also has a support housing of a supply connector 22. This housing 212 is a cavity having a main opening for introducing the supply connector 22, a feed opening 2120, of which the opposite direction to the main opening, allowing the passage of a connecting piece 223 of the power connector, and the lower openings 2121 and 2122 2122 allowing the passage of the handle of a surgical instrument through the support niche. It should be noted that, according to other possible embodiments of the invention, the support may be an integral part of the instrument holder, comprising a support housing of the power connector and having openings allowing the passage of an instrument through the housing. It does not present, in this case, elastic gripper. The Power Connector The power connector 22, which is intended to be placed in this recess, has essentially a shape of revolution around a central hole through 220. This hole 220 is intended to allow the passage of the handle of the 3, the diameter of which is shown in dotted line in FIG. 8. The edges 2201 and 2202 of this hole, respectively at the upper and lower surfaces of the feed connector, have a diameter slightly smaller than the rest of this hole. way to come into contact with the periphery of the instrument handle. Thus, these edges can provide a function of seals against this handle. Outside these edges, the surface of the hole 220 has a slightly larger diameter, so as not to come into contact with the handle of the instrument as it is placed in the hole. Thus, the friction between the handle of the instrument, which is intended to rotate, and the power connector 22, which is intended to remain fixed relative to the contra-angle head, are limited to the edges 2201 and 2202.

An inner peripheral groove 221 is provided on the surface of the hole 220, so as to allow easy circulation of a liquid around the handle of the instrument. This inner peripheral groove 221 is connected to a supply line 222 radially traversing the supply connector 22, and extending into a connector ferrule 223 protruding from the power supply connector 22. When the power supply connector 22 is placed in the niche 212 of the support jumper 21, this connecting piece 223 is placed in the hole 2120, so that it is then possible to connect the end of a flexible hose, in order to delivering a fluid into the peripheral groove 221 surrounding the handle of the instrument 3. This fluid can come from a container located higher than the contra-angle head, and flow by gravity into the hose, or be pumped from a reservoir by a feed pump well known in itself to those skilled in the art. Advantageously, the respective dimensions of the supply connector 22 and the housing 212, and / or the flexibility of the material constituting the supply connector 22, allow a slight displacement of this connector 22 in the housing 212. Thus, when the sleeve 32 of an instrument 3 is inserted into the hole 220 of the connector 22 and then into the head body 12, the power connector 22 can move slightly so that its hole 220 is properly aligned with the axis of the instrument 3.

When the handle 32 of the tool 3, or the handle 42 of the tool 4, is introduced into the head body, the feed portion 33 or 44 of this handle protrudes below this head body 12 and remains in the hole 220 of the power connector 22.

As shown in Figures 9 and 12, the feed portion 33 of the handle 32 has two segments 331 and 332 whose diameter is slightly greater than the diameter of the rest of the handle 32. These two segments are intended to be in contact, respectively with the edges 2202 and 2201 of the hole 220 of the supply connector 22, so that these edges form seals against the handle 32. Between these two portions 331 and 332, an intermediate portion 333, which is intended to be placed opposite the peripheral groove 221 has cutouts 334 giving access to at least one inner pipe 341 provided in the instrument. The peripheral groove 221 being supplied with fluid, this fluid therefore enters the inner pipe 341.

The instrument 3 can thus be easily supplied with fluid, through an opening located at its handle, without it being necessary to make changes in the structure of the contra-angle head 1. A simple device power supply 2, simple to install and inexpensive enough to allow this power supply.

In the same way, the supply connector 22 can also supply fluid to the instrument 4, if its handle is introduced into the contra-angle head 3. The fluid supply portion 43 is thus surrounded by the connector supply 22, so that the fluid flowing in the peripheral groove 221 can penetrate into the transverse supply line 441 of the instrument 4. In addition, the device for the supply of fluid according to the invention is carried by the instrument holder, it is independent of the rotary and / or vibrating surgical instrument. It is thus possible to remove or change the rotary and / or vibrating surgical instrument without removing the device for the fluid supply.

It should be noted that, according to other possible embodiments of the invention, the supply lines could also be distributed differently in the blade. For example, it would be possible for only a substantially longitudinal duct to be provided which extends to the end of the blade to open an axial fluid supply opening of the instrument. The rotary and / or vibrating surgical instrument should then be used with an instrument holder adapted to supply it with fluid. The skilled person can, without difficulty, imagine other rotary and / or vibrating surgical instruments capable of being supplied with fluid by a fluid supply device of the same type. The use of the fluid supply device described above is therefore not limited to the surgical instruments described.

Claims (10)

REVENDICATIONS1. A rotary and / or vibrating surgical instrument (3) comprising: a blade (31) having a first end portion forming the tail, and a second end portion forming the active portion (310) of the instrument, a handle ( 32) surrounding said tail, and adapted to be inserted into an instrument holder for retention therein, said blade (31) comprising a slotted portion extending over at least a portion of its active portion (310) and / or on at least a portion of its tail, the cross section of said blade at its split portion being formed of at least two subsections separated by a slot (311), characterized in that said rotary surgical instrument and / or vibrator 15 also includes a plastic material (312) overmolded into said slot (311), so as to at least partially fill said slot (311) on at least a portion of said slotted portion. Rotary and / or vibrating surgical instrument according to claim 1, characterized in that said plastic material (312) fills said slot (311) so as to connect said subsections of the entire slotted portion located at the level of said tail. 3. Rotating and / or vibrating surgical instrument according to any one of. Claims 1 and 2, characterized in that an inner pipe (342) extending substantially longitudinally in said blade (31) is formed in said plastic material (312) overmolded in said slot (311), on at least a portion of said split portion. 4. Surgical instrument according to claim 3, characterized in that an inner pipe (341) extending substantially transversely in said blade (31) is formed in the overmolded plastic material (312) in said slot (311), between said inner pipe (342) extending substantially longitudinally and a lateral feed opening. 5. Surgical instrument according to any one of claims 1 to 4, characterized in that said handle (32) is constituted by a sleeve reportedentourant said tail. 6. Surgical instrument according to any of claims 1 to 4, characterized in that said handle (32) is constituted by a plastic material overmolded on said tail. A device for fluid supply of a rotary and / or vibrating surgical instrument (3) according to claim 4, comprising: a power connector (22) having a central through hole (220) capable of circling a portion of a rotary and / or vibrating surgical instrument (3) according to claim 4 for supplying fluid to said lateral opening of said rotating and / or vibrating surgical instrument; a support (21) intended to be placed in front of the opening of an instrument holder for receiving said rotary and / or vibrating surgical instrument, said support (21) comprising a support housing (212) of said power connector ( 22), said housing (212) having apertures for passage of said instrument (3) through said housing; characterized in that the power connector (22) is movably mounted in said housing (212). 8. An instrument holder comprising an instrument holder associated with a fluid supply device according to claim 7. 9. Instrument-carrying equipment according to claim 8, characterized in that said support (21) of said supply device is removably mounted on said instrument holder. 10. Instrument-carrying equipment according to claim 9, characterized in that said support (21) of said feeder is fixedly mounted on said carrier.