IL43125A - Dental implants - Google Patents

Description

The present invention relates to a novel type of dental More it relates to a novel dental The novel implant is characterized by its simplicity of the ease of its insertion in place and its The novel implant is implanted by the technique developed by the and this specific technique greatly creases or even eliminates the contaminat ons and infections frequently encountered with endosseous stage Other and further features of the present invention will become apparent The field of dental implants presents considerable difficulties since frequently infections Therefore it is one of the objects of the present invention to provide a and to overcome this drawback of dental The implants according to the present invention are intended as crown and supports for dental bridges and the Since about experiments have been out with plastics and with plates juxtaposed to the These procedures have gradually been abandoned due to surface bone and reaearch has been directed endos seous towards implants which are known as or In the odontological where an implant for fixing a tooth in position is of great various types of implants have been tried be mentioned the Lehman arch the Sandhaus crystal the implant which has 3 screws and a head the Cherchewe implant and the Llnkow screw the implant formed by three needles so as to form a triangular group These lead often to serious complications because of the weakeni ng o the and more particularly of the mandible also due to the frequent infections which make it necessary to resort to antibiotic and inflammatory The implant of the present invention overcomes to a large extent the drawbacks of the implants used and it avoids to a large extent infections or destruction of the bone The novel implants are easily inserted the and into the cavities remaining after the extraction of they are firmly anchored in such cavities and serve effective supports for various dental such as bridges and the According to a preferred embodiment of the present invention means are provided in the the stresses on the underlying bone The effective surface area of the novel implants is comparatively and thus the pressure and stresses over during chewing are distributed on a comparatively support The novel dental endosseous implant by substantial advantages as compared with the hitherto used One of its main features the provision of means for cushioning the to the underlying and surrounding bone due to biting and chewing of hard The stresses are absorbed and spread out preventing too large stresses on the A further feature is the implant which is but net used with these novel dental implant According to the preferred of there is first inserted the foundation pin and support member for the this is closed at its upper end and so as to provide a tight this implant is left in place for a period of time sufficient for tissues to form around the and at the second the with its shock absorber or absorbers and the crown or other dental device is mounted on the support member of the foundation It of also possible to insert the pin and to mount on it without delay the shock absorber and the dental much better results are attained when sufficient time is permitted to elapse between the and second stage of the implant for tissue to form around the implant foundation the most important of the novel dental implants according to this there to be mentioned the either separately or in The dental implant is carried out in two effecti ve The provision of a large area of the base of the in contact with the the provision of spikes on this base for anchoring in The provision of efficient shock absorbing adapted to cushion the pressure and stresses set up during chewing of The provision of a coating of a suitable material on the surface of the base of the inserted adapted to enable bone and other tissue to gro thereinto to form therewith a strong natural environment of the tooth is an imperative feature and this is of cardinal importance for the success of such Calculations have shewn that the provision of a shaped base provides such large area and as the pressure on the tooth during eating is passed on to the the surrounding the larger the effective area of the the smaller the stress will be upon a unit The novel implant according to the present invention is characterized by the provision of a plurality of small protruding spikes on the conical surface of the the spikes forming an angle with the conical so as to firmly anchor the implant in place after its insertion in The spikes act as holding the implant in preventing the movement of the implant out of its place in the bone The invention will now be described by way of illustration only with reference to the enclosed which are not according to and in F gure 1 is a side view of an according to the Figure 2 is a vertical median section of the implant of Figure 3 is a vertical median section of a modified foundation conus according to the Figure is a top view of the upper part of the implant of Figure a top view of a modification of the part of the implant of a As shown in Figure the novel implant comprises The conical foundation pin has a height of about the diameter at its upper part is about 3 and on surface there is provided a plurality of spikes of about length and suitable diameter and These are best formed by casting the entire conical support from a suitable The metal will be chosen so as to be corrosion resistant in the biological environment it is used and it will be of suitable mechanical Especially suitable are certain stainless of the type used in surgical instruments and in Especially suited there are certain Other metals may be used as which fulfil the above there may also be used certain ceramic substances and even some special plastic As shown in the the spikes form an the surface of the and point in the direction of the member The rigid spikes serve to firmly anchor the conical support member in place and prevent its removal from place after As shown in 3 the outer layer of the conical spongy support membe may be made from a layer attached to the underlying and case the spikes 13 are an integral part of the inner metallic core of this conus porous coating on the base of the implant permits tissue to grow into the pores and thus there is gradually formed a strong bond between the implant and the surrounding This thin layer may be made of two of them layers having specific provided with small the inner one being soft and flexible providing shock absorbing features the outer one a e n The support member 12 compises a lower portion provided at its lower end with a screw adapted to be screwed into the bore provided in the conical member 11 and with a wider upper section This is advantageously divided into two parts 15 and between which there is provided a 16 comprising a thin layer of silicone rubber or the like firmly glued to sections 15 and This shock absorber is advantageously but is not necessary in all cases of The of the crown support member is as shown in Figure or it may be ellipsoid as shown in Figure At the of the crown support there is advantageously provided an indentation which makes it po ssible to the crown support member into the foundation conus by means of a suitable Although termed support this member may al so serve as support for a dental or two such implanted with the respective conical foundation into of a extracted may serve as support for one Sue to the provision of the spikes on the surface o the conical support the use of further means of fixation is The foundation pin is advantageously driven into the as as possible after the extraction of the and as this is done with some force the foundation conus is anchored firmly in The surface of this foundation pin slightly below the level of the gums and the opening is advantageously a suitable t After remaining in place for a period of from so as to provide adequate time for the consolidation is advantageously checked When the osteogenesis has taken place to a satisfactory the upper part is screwed in place and the crown n or other dental fixture can be safely and securely mounted This implant has the advantage that it is adapted to form together with the organism in which it is implanted a biological adapted to fulfil the natural functions root of a of a The novel construction of the endosseous implant results in the formation of oriented fibrous conjunctive tissue connecting the jaw bone with the implant in a manner analogous to the connection of the bone with a natural The formation of the oriented conjunctive tissue is a result of the provision of the layer of biologically acceptable substance covering the outer surface of the conical foundation the formation of tissue adhering thereto and the subsequent orientation of the thus formed fibrous tissue due to stresses to which the implant is subjected during use Research carried out by many scientists has established that the normal organism forms a fibrous conjunctive tissue around a dental implant which is permanently introduced and fixed in the jaw This fibrous tissue is gradually formed and the process is complete after a period of some This tissue adheres well to the but not so to the materials conventionally in dental such as ceramic or plastic This is due to the surface properties of these implants and due to the inability of thus formed conjunctive tissue to sufficiently adhere to such Due to the chewing movement stresses and torque are set up in the conjunctive tissue formed between the bone and the porous layer of the and this stress results in due course in an orientation of this resulting in the formation of oriented collagen fibres of periodontal similar to that supporting a natural d The repeated stresses and torque to this tissue brings about its orientation and strengthening and implant this results in the dental held in place in a manner like the holding in place of natural assortment There ought to be available a wide of conical foundation members of varying shape thickness as soon as possible after the extraction of such foundation pin is inserted in the alveole thus In cases it is possible to form a suitable cavity in the bone and to insert thereinto the conical foundation insufficientOCRQuality

Claims (5)

43125/2 WHAT IS CLAIMED IS;

1. A dental implant for implantation by the two -stage method comprising in combination :' a) a conical foundation member provided with a plurality of spikes which point away from the apex of the conus; b) a crown support member adapted to be screwed into a suitable screw-threaded bore provided at the upper part of the conus, said crown support comprising a neckportion and an upper part which includes a frusto-conical portion.

2.. A dental implant as claimed in claim 1, wherein there is provided a layer of resilient material at the lower end of the frusto-conical upper part of the crown support member, this layer serving as shock absorber,

3. ·' A dental implant as claimed in claim 1 or 2, wherein the outer layer of he conical foundation member-is made of a spongy material, said spikes protruding through this material,

4. A dental implant as claimed in any of claims 1 to 3, wherein the cross-section of the crown support is round or oval.

5. A dental implant for two stage implantation, substantially as hereinbefore described and with reference to the drawings. P.O.Box 33116, TEL-AVIV Attorneys for Applicant