CA2138842A1 - Catheterized intra-osseus delivery system - Google Patents

Abstract

A dental apparatus for perforating the cortical plate of the maxillary and mandibular bones comprises a hollow needle moulded into a plastic mould to then receive the driving shank that is driven by a conventional contra angle or straight hand piece. It is also a catheter for the

Description

~CAl ~ ;Kl~D INT~-OSSEUS
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,n~ vr~ . -{6133~722-2~5 ~Paul~Riel Clément : ~ Specifications 29~Beechmont Cres.
Gl~ucester, Ontario Canada KlB 4A7~ Thc specifications of this (6~13~ 834-8441 :invention are Fig. 1, a cap made of plastic or metal or matcriel adequate for this procedurc. This cap normally would mcasure 15mm in length and 7mm in radius. Fig. 2 is thc female version of the invention using a needle 2 as a drill and catheter which is attached to a plastic or other material suitable for this operation 7, This shank contains a ridge or collar to permit 1 to attach itself and form a cover keeping the needle end free from bacteria or other. The needle 2 continues through the shank and forms a bevelled end to enter more easily with another .~ H~'J~ r,,~,:~F,n,l~SS-~US ~DE~ ~ '~
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213~842 needle and to be used as a catheter. This needle, 1, 6, would normally be of 22 gauge in size. Enclosed is teeth like grooves 5 that act to lock with 9 of the male (Fig. 3). Fig. 3 is the male version of the invention 9 being the cylinder type cover attached to the teeth inside 9 to lock with 5 of (Fig. 2). There is a shank that attaches this apparatus to a contra-angle or straight hand piece to drivc thc apparatus 10, and having a common groove 11, 12, to lock the shan`k in place.
Fig. 4 is the same as (Fig. 2) just to show (Fig 5) and its use. Fig. S, the same shank as (Fig.3) but with a modification. It has a centre rod 13 that penetrates th~ugh the needle of 2 (Fig.

2). This rod acts as a guide plus a blocker for foreign matter. This rod penetrates through the shank 10 (Fig. 3) which can be seen as 14. Fig. 6 is a male shank with a different way to secure itself - ~ .- -~S~U S ~ DELIVERY -SYS~ ~ ~LD.S.~
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to (Fig. 7). By threading one to the other and using the centre rod to align the two together, a similar result can be achieved. Fig. 7 is the female version that adapts to (Fig. 6?. There are a variety of ways that this invention can be dcvised, but the end result is to perform Catherized Intra-osseus Dclivery System.
This is a bctter and a less painful way to anaesthesize in preparation for dental and or any other intra-osseus applications.

Background of the invention The present invention relates to a dental apparatus for cortical plate perforation and injections.

There are a variety of methods cw rently in use for providing local anaesthesia in dentistry. These methods and apparatus, however, all have disadvantages either being difficult for a - ~138842 dentist to perform or painful and unpleasant to the patient.

Example: in the infiltration method, a local anaesthetic solution is injected into soft tissue. In doing so the solutiori eventually passes through the cortical plate thus affecting the nerve bundle entering the tooth. Disadvantagcs include a delay after the injection to take effect and in most cascs ballooning of the tissues. There is a extended period of time for the recovery of the tissue to return to normal.

Example: in the regional block method, an injection of local anaesthetic solution is injected around the nerve trunk as it enters the bone.
Disadvantages with this procedure are, that it is extrernely difficult to locate the nerve trunk~ there is discomfort to the patient and a delay for the anaesthesia to .
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take affect. As well, in this method there is also a long recovery period for tissues to return to normal.

Intra-osseus anaesthesia is therefore the best method to anaesthetize tecth by injecting local anaesthetic solution in the cancellous bone around the apex of the tooth. To achieve this type of anaesthesia, you must gain access to the cancellous bone by going through the cortical layer .

This is the preferred method.
Because of instant anaesthesia and profound pulpal anaesthesia, there is a much greater control over the region you wish to anaestheti-ze, resulting in a much smaller dose of anaesthesia.

A type of apparatus to perforrn intra-osseus anaesthesia. The villette injector which is very expensive and needs to be sterilized between uses or a - - :

1388~2 new bur used each tirne. Although it is used as a perforator and injector, the passage through the injector often gets blocked with pulverised bone, consequently requiring another needle to inject the anaesthetic solution. The design of the instrument makes access to various parts of the mouth difficult and sometimes impossible.

It is thercfore an objectivc of the present invention to remedy to above problems and disadvantages of delivcring dental anaesthetics. According to the present invention there is a dental apparatus for perforating the cortical pla~e of the maxillary and the mandibular bones, comprising of a hollow needle that is used as a drill and a catheter. The said needle is attached to a plastic or metal shank that has a female receptor to receive the driving shank, which is driven by a conventional contra-angle or ~

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2138~42 straight hand piece. The other is to receive to cap (cover) to protect the needle from damage and or infection.

~he male shank also acts as barrier from contamin~tion. It is generally thought that bacteria is reluctant to change dircction through 90 degrees. ~his would make bacteria change direction at least 7 times before being able to penetrate the necdlc in the male shank.

-Furthermore, when the male shank is removcd, it acts as a catheter to then leave passage for another hypodermic needle of 30 gauge. This needle can be introduced through the - female shank without loosing access to the already perforated bone.

An embodiment of the invention of the invention will now be described by way of example with reference to the accompanying drawings in which:

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FIG. 1 is a illustration of the female shank, incorporating the needle drill and catheter.

FIG. 2 is a illustration of the male shank used to drive the female shank through the gingiva and cortical plate, after which the female shank remains in place though the gingiva and the cortical plate acting as a catheter for the injcction through the interior of the female shank.

FIG. 3 is a illustration of the cap that fits to the needle end of the male shank.

FIG. 4 is the same illustration as Fig. 1, but used with a different manner in relation to Fig. 5 FIG. ~ is a illustration of another version of the male shank. This illustration has a solid metal pin that fits : . , : . .
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E~ ~l~O;SSEUS D~LlVERY~ ~Y5TEM ~LD~S.3 2138842 ```` i;` `

in the needle of Fig. 4 to block entry of drill debris while drilling through the gingiva and the cortical or cancellous bone.

FIG. 6 is a illustration of a different male version. This method would be secured to Fig. 7 by rotating one against the other from a thread like bond to each other. It has the same similarities as Fig. S but does not have teeth to securc it from rotating, but has the same metal rod to block debris and keeping the male and fernale in line with each other.

FIG. 7 is a illustration of the female version that would adapt to Fig. 6.

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The following techn;que should be used:

1. Sel,ect the site, for injectioM.

2. Disi~lfect and topical anaestheti~e the attaclled gi~lgiva over the i~tjection si~e.

3. Place tlle bevel of tlle sta~ldard gauge needle agai~lst the gingiva aMd i~lject a small amou~lt of a~laestlletic solutio~
until blanching of the tissues.
This will anaesthelise the gingiva and the periosteum.

4. Place the perfoYator (Fig.2) and (Fig. 3~ attached iM
a contra angle Of' straight dental handpiece.

5. Hold the perfo7 ato7 perpendicular to the cortical E~D l~SEUS~DELlYER~ SYSTEM ~(CL~-S.~
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plate and the gingiva and perforate the gingiva and the cortical plate in small burst of r otation from the hand piece u7ztil resistance is MO longer felt.
At this point you have crossed the cortical plate.

6. Remove tlle male shank that is attached to the hand piece bv applvillg pressure to the female slla/lk with vour f ~zgers thus keeping the needle in the pe~rated cortical plate. l~zis allows a injection to be made wifhout complicated manoeuvres to f nd the perforation in the case offi!oating gir7giva or the free or marginal gingiva.

7. Insert the injection needle through the female shank , .. . . . . . , ~ ~ . ~, .

- 21~88L2 and inject the anaesthetic solution required.

8. Remove the female shank ~om the cortical plate and reinstall the cover cap to the needle end, then insert the male end to the female shank making the unit complete and disposable.

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Claims (9)

1. A dental apparatus for perforating the gingiva and the cortical plate of maxillary and mandibular bones or any such operation or procedure that would need a injection in the case of Intra-osseus. Comprising of a hollow needle drill as a bur, that serves as a drill and a catheter to penetrate and inject below the cortical bone into the cancellous bone.

2. An apparatus whereas the unit separates to allow a drill motion and then allowing a catheter for the injection with a standard needle.

3. An apparatus that makes a injection in the cancellous bone even though the gingiva is moving or free or marginal gingiva.

4. An apparatus giving a wider motion to perform a injection through the cortical plate.

5. An apparatus that separates in two parts to give easy access to the catheter for the injection.

6. An apparatus to drill through the bone to deliver anaesthesia that separates in two parts to keep the catheter in place even when the driving end is removed.

7. An apparatus that blocks the drilling needle end while drilling through the bone.

8. An apparatus that keeps the two male and female attachments in line by a rod penetrating the needle and preventing passage or entry of bone fragments while drilling.

9. An apparatus which secures to each other, the male to the female, by a thread like fashion.