SCREWED CYLINDER IMPLANT WITH INTERNAL HEXAGON PARTICULARLY DESIGNED FOR DENTAL PROSTHESES (FLP 98) ALSO CALLED TRANSMUCOUS CYLINDER

Description

STUDY TECHNICAL-LEGAL THE PATENTS Don. Prof. FRANCO CICOGNA Description of the Patent for a Utility Model having as title- the; "CYLINDER SYSTEM SCREWED WITH HEXAGON INTERNAL, PARTICULARLY DESIGNED FOR PROSTHESIS DENTAL (FLP 98) ALSO CALLED CYLINDER "TRANSMUCOUS" Mr. FLORIS Dr. Pier Luigi, of Italian nationality, resident in SASSARI, and electively domiciled at the Patent Office of Dr. Franco Cicogna, in Via Visconti di Modrone 14 / A - Milan. Deposited at N. DESCRIPTION 2 0 0 0 V 0 0 0 0 9 ft The present invention concerns a cylinder implant with internal hexagon, particularly designed for prostheses dental. The problems associated with dental implants are numerous, and among the most significant are surgical trauma and long healing times. Furthermore, the failure rate of traditional implants is quite high and due to various causes. The aim of the present invention is to create a cylindrical system, with an internal hexagon, improved compared to traditional systems. Within the scope of this task, one object of the invention is STUD O TECHNICAL-LEGAL PATENTS Dates Prot. FRANCO CICOGNA to create a cylinder system, capable of reducing the healing times. Another aim is to create a system cylinder which involves very little surgical trauma and a extremely low risk of failure. This task and these aims, and others that appear better will be highlighted later, are reached by a system cylinder with internal hexagon, particularly designed for pro dental thesis characterized by the fact that it includes a stem provided with a smooth neck at the top with a hexagon internal, of a threaded portion, and, below, of a point rounded ta. The above mentioned stem is treated, at least partially, me during roughening of the surface with alumina sandblasting. Additional features and benefits feels found will be more an examination of the description of a form of the object of the pre- highlighted through of preferred realization limited, but not exclusive, representation of the invention, illustrated for illustrative purposes only, but not limited to, in the attached drawings, where: Figures 1 and 2 are views, respectively in cross-section plan and elevation, of a system according to a first aspect to the finding; Figures 3 and 4 are views, respectively in longitudinal section plan and elevation, of a system according to a further aspect of the invention; STUDY TECHNICAL-LEGAL PATENTS Qualities. Prof. FRANCO CICOGNA Figures 5 and 6 are views, respectively in long section legal and elevational, of a system according to a further aspect of the finding; Figures 7 and 8 are views, respectively in long section legal and elevational, of a system according to a further aspect of the finding; Figures 9 and 10 are views, respectively in longitudinal section and elevation, of a system according to a further aspect of the invention; Figures 11 and 12 are views, respectively in longitudinal section and elevation, of a system according to a further appearance of the finding; Figure 13 is a top view of the plant in the previous figures. With particular reference to the numerical symbols of the aforementioned figures, the cylindrical implant, equipped with an internal hexagon, particularly designed for dental prostheses, according to the invention, indicated globally respectively with the reference numbers 1, 101, 201, 301, 401, 501, comprises, with reference to the implant 1, a stem 2 having a smooth neck 7 and an end part with a counter-bevel equipped with an internal hexagon 3, a threaded portion 4 and ending with a rounded tip 5. The stem 2 may comprise, at the bottom, a hole pas sante 6, corresponding to the tip 5, as illustrated for STUDY TECHNICAL-LEGAL c PATENTS Data. Prof. FRANCO CICOGNA the plants designated 1, 101, and 501 respectively. The system according to the invention can be made in three groups of three different diameters, respectively 3.35 mm, 4.8 mm, and 4.80 mm. This allows you to exploit thin, medium and thick bone ridges. latively thick. Each group has various lengths ranging from 8, 10, 12, 14 to 16 mm to give the possibility of using the maximum bone depth. The rounded tip 5, equipped with a through hole 6, in the case of transmucosal cylinders 1, 101, and 501, having length of 10, 12, 14, and 16 mm, allows, unlike the implants traditional, greater osseointegration. In fact, the bone penetrates the through hole 6 giving maximum stability at the tip of the implant. Along the stem 2, the system is provided with turns 4, and in In particular, the 8 mm cylinder is provided with three coils, the ci 10-12 mm cylinders are supplied with four turns and the ... 14-16 mm are provided with five turns, which give primary stability, unlike traditional smooth implants which do not have immediate primary stability. This allows the system according to the invention to have a more ra faster osseointegration, lower chances of failure and the possibility of prosthetic loading within 70-90 days unlike traditional systems of the same type which can be PATENTS STUDY TECHNICAL CO-LEGA LE Qualities. Prof. Frank Stork loaded only after 150-180 days. The implant according to the invention is very useful as a post-extraction implant and in the presence of fibrous bone of the D1 type, or of semi-atrophic maxillary and mandibular saddles, thanks to its primary stability being semi-submerged. Furthermore, being able to remain without functional load for over two months, the system according to the invention allows a perfect ossification. The internal hexagon 3 in the smooth neck 7 serves as an anti-rotation for the abutments (not illustrated) which can be straight or inclined at 15° and 25° and for over-dentures. The neck appears much narrower near the cortical crest, compared to traditional implants, allowing for easier prosthetic placement with excellent aesthetic results. In particular, the neck of the tooth does not appear with the classic grey transparency, typical of traditional implants of this type. The cylinder, except for the neck, is coated with Microgrip. This treatment consists of roughening the titanium surface with alumina sandblasting performed with particles of 25-70 μm and a pressure of 0.36 Mpa. The roughened surface thus gives the cylinder a greater surface area for adhesion to the bone and greater primary stability. With this type of treatment there is a greater multipli- >*%•>-----^2*0 x ff / studio yA A / technical-legalV^X hl PATENTS \*\ Ootl. Prof. / S' / VxfRANCO CICOGNA. / iJ cellular cation of osteoblasts, a three-dimensional cellular organization and therefore a faster and more effective osteointegration of the implant according to the present invention. It has also been noted that when the pores produced by the alumina Microgrip treatment are greater than 10pm, cell proliferation is even greater. In fact, the production of prostaglandins Ez (PGE2) and "transforming growth factor" B1 (TGF-B1) increases with increasing roughness, indicating greater activity of the rougher surfaces. Examination of the surface of the implant thus treated shows no particulate residues and the deposition of alumina on the titanium is uniform. Histological results show no gap at the bone-implant interface. Furthermore, histophotometric analysis shows a bone contact percentage of 80% ±7% under SEM observation. During the screwing of the implant, with consequent "torque", the surface of the implant does not suffer any microlesions as instead occurred in traditional implants with surfaces treated with calcium hydroxypatite, with consequent inflammation from microresidues. The presence of the coils also allows for the exploitation of the three spatial dimensions of the alveolar ridges. The screw propeller is wide-based, the metric pitch is STUDIO \>\ / technical -links\%\ h PATENTS Ì \ *i\ Dolt. Pro!. / V\FRANCO CICOGNA / * / \ • 'ky / of about 1.23 mm, the scrolls are 360°, and the thread is therefore the support surface is mint. All this, and the dimensional characteristics of the threads 36°, attenuates the force due to the longitudinal compression load, generating a radial component that is discharged on the external bone surface of the coils themselves. These characteristics give the system according to the found the maximum resistance, after functional loads. The space between the cylinder coils allows the medullary bone to regenerate between them with an alveolar structure and this is why the implant can be loaded within 60-70 days and not after 5 or 6 months, as with traditional implants. Another advantageous feature of the implant according to the invention, compared to traditional implants, is the possibility of in-fibulating it without a surgical flap, hence the name transmucosal cylinder. This allows for a faster intervention, avoids trauma and surgical swelling of the flap, and allows for a virtually asymptomatic post-operative recovery, without swelling or spontaneous pain, also allowing for healing to take place in approximately seven days. Furthermore, the implant according to the invention causes a smaller handicap for the patient and a smaller number of failures due above all to infections and bone resorption, Zj>' / X*«X / + / STUDIO \-i\ A / legal technicianXVV hl PATENTS * \ *\ Dear Prof. i\l V\FRANCO CICOGNA X^T,, resulting in mobilization of the system. The implant according to the invention also has fewer contraindications in patients with diabetes and diseases with lower immune resistance, decreased coagulation, hypertension, etc. In practice, it has been found that the invention achieves the intended task and purposes. Naturally, the materials used, as well as the dimensions, can be any according to the needs and the state of the art. ff / STUDIO \>\ A / TECNICO-LEG A Le\\\ |ìl PATENTS j'j Dr. Prof. / ì V\FRANCO CICOGNA / * / \*\ . / J

Claims

CLAIMS 1. Cylindrical implant with internal hexagon, particularly designed for dental prostheses, characterised by comprising a stem having a smooth neck at the top with an internal hexagon, a threaded portion, and, at the bottom, a rounded tip; said stem being treated, at least partially, by roughening the surface with alumina sandblasting.

2. System, according to claim 1, characterized by) the fact that the surface of said stem is made of titanium and said alumina sandblasting is performed with particles of 25-70 fjva and a pressure of approximately 0.36 Mpa.

3. Implant, according to claim 1 or 2, characterised in that said stem comprises, at the bottom, a through hole, corresponding to the rounded tip.

4. Implant, according to one or more preceding claims, characterised by the fact that it is made in three groups of three different diameters, respectively 3.35 mm, 4.8 mm, and 4.80 mm, to exploit thin, medium and relatively thick bone crests.

5. System, according to one or more preceding claims, characterised in that each group has various lengths, varying from 8, 10, 12, 14 to 16 mm.

6. System, according to one or more preceding claims, characterised in that the aforementioned threaded portion comprises STUDY TECHNICAL CO-LEGA LE c PATENTS Qualities. Prof. FRANCO CICOGNA takes turns, said 8 mm system being supplied with three coils, said 10-12 mm implants being supplied with four coils and said 14-16 coil systems.

7. System, according to a transferor, characterized by the fact mm being provided with five or more of the claims pre that the screw propeller of these coils have a wide base and the metric pitch is approximately 1.23 mm.

8. System, according to one or more of the preceding claims, characterised in that the widening of the threads is approximately 36°.

9. System according to one or more of the preceding claims you, characterized by the fact that it includes one or more charac-