BR102012018107A2 - SCREW SCREW TO BE USED IN TOOL FOR EXODONTIA - Google Patents

Abstract

ROOT-SCREW TO BE USED IN TOOL FOR EXODONTICS. Exodontics; root extraction; extraction with minimal use of physical force; ergonomics in dental extraction tools; productivity in dentistry by reducing the time of exodontic interventions. The developed screw and object of this patent is basically constituted by an axis with a groove or a helical line that forms its immediate contact surface. New features have been developed whose main objects are to make all the forces that would come from a common screw in axial stresses with those resulting from the applied forces turned towards the central axis of the part, thus distributing such stresses longitudinally, minimizing fractures by transversal or tangential stresses when used correctly. Knife-shaped fillets with curved teeth (3) were designed so that they occupy the smallest possible space in the middle and the radius of curvature that allows a perfect transmission of efforts to the center of the screw, thus avoiding the expansion or expansion of the tooth root , avoiding major efforts required to extract the root or generate crack or fracture. The three cuts (2) created along the thread threads have the function of removing the material occupied by the thread threads and storing the chips generated when cutting the same operation as a "male" and again ensuring that there is no effort that causes the root expansion.

Description

“SCREW SCREW TO BE USED FOR TOOL FOR EXODONTIA”.

Fields of this patent.

• Extraction.

· Root extraction.

• Extraction with minimal use of physical force.

• Ergonomics in extraction tools.

• Productivity in dentistry by reducing the time of exodontic interventions.

State of the art.

Dentistry has, since its inception, a tool that practically established itself as its symbol: - the forceps for dental extraction.

Forceps for the specialists, botanicals for the laity.

In fact, in its early days, when dental hygiene was almost non-existent and practically lacking in technique, tooth extraction with unbearable abscesses or pains was the urgent solution; as well as extraction of all teeth for denture use was the planned solution.

The tooth root is the part of the tooth that supports the crown (visible portion of the tooth), and is inside the bone and gum.

Sometimes a dental fracture, severe caries, or incomplete extraction causes retained dental roots to appear in the mouth, which is very common.

Retained roots may appear in the mouth for several reasons, and at the head we find dental fractures (either of living or devitalized teeth, most often with devitalized teeth), severe and advanced caries processes, consequently we have total loss of the dental crown, or incomplete tooth extractions, where we have partial fracture of tooth 30 extracted.

Regarding general health and well-being, the presence of retained roots can lead to widespread infections, muscle aches, decreased immune responsiveness, difficulty in stopping muscle injuries and general pain.

Criticism of the State of the Art. Virtually all dentists have had problems extracting the apical portion of some root that broke during extraction.

An endodontic file is often used, but it does not have sufficient strength to aid in full extraction and recently small tools have been developed as illustrated in Figure 4. However, these do not apply in all cases and require skill, strength and patience, because the axial force required for this extraction will be performed manually or with the help of some tool that will affect the surrounding teeth in a way that will act as a lever, not offering adequate conditions in more complex or delicate cases. .

Due to these conditions, which are incompatible with the great advances of dentistry in the last 20 years, several researchers have developed instruments that use levers and screws to, with less physical effort, promote safer, more accurate, lower risk and smaller injuries. .

Such appliances are not made in Brazil, they are very expensive and the models we have available in the market are primary, although they are beautiful metal parts, built in high quality stainless steels.

Once a captive market was created for such appliances, as is often the case in the dental market, they remained in such early evolutionary forms as they faced no competition.

Advances in the state of the art brought by the "SCREW SCREW TO BE USED IN TOOL FOR EXODONTIA", object of this Patent.

The object of this Patent advances the State of the Art for several reasons that will be listed and timely demonstrated, consisting of three devices used, or may be coupled with other existing devices of minimally traumatic extraction.

These are intraradicular extractor screw, digital key for locking and active prismatic tip.

The developed intraradicular puller screw and one of the objects of this patent are constituted by a shaft with a groove or a helical line that forms its contact surface with the root or material to be extracted, 35 this thread can be of various shapes as a knife tooth. , sawtooth, trapezoidal, curved knife gear tooth or any other that minimizes the space occupied by them and best transmits the pulling motion to the long axis of the material or root to be extracted, this same fixing system can be in the form of an expansive “bushing” or locking by a “handcuff” type of police cuff. The screw can have in its composition various materials, such as steel, polymers or any other that allows its construction. In the case of cuts in the thread fillets or cuts transverse to the threads, it may be par! or entirely along them for the purpose of "cutting" or "removing" the material to be filled by the fillets. Being stored the “chip” generated in this process, functioning as a tool called “male”, presented as a semicircle, spheroid, cone, prism or any other form that allows active tips coupling that will be explained below. It is coupled to transmit movement or pulling force that always seeks its axis, a head, groove or any other form that allows the coupling of a key or device for its screwing and fixing. One or more pieces may be used.

The active tip that can be prismatic, toroidal, chamfered, semicircular or any other form that coupled to the screw allows movement or not, but always seeks the transmission of tensile effort along the axis of the intraradicular screw, a socket for 20 Fixing on the traction tool can be done in several ways, as an example we can use pins, holes and others that allow this coupling, and can also be coupled directly on the draw cable using a "bridge", "cross" or any other means that allow it to be balanced, it is important to indicate that it may mate or there is no more than one intraradicular screw.

The digital key for locking the intraradicular screw should have an intraradicular screw fixation system that can be mechanical, magnetic or any other way that ensures the intraradicular screw does not come out of the patient's mouth and fall to the floor, thus avoiding 30 accidents, It should contain the system for locking the screw, allowing its rotation and promoting the locking in the root.

New features have been developed whose main objectives are to make all the forces that would come from a common screw in axial forces with those resulting from the applied forces facing the central axis of the workpiece, thus distributing such forces longitudinally along its axis, minimizing the possibility of transverse or tangential fractures when used correctly. The use of such a screw is made simply by making a hole with a known depth in the root to be extracted using a commercially available drill bit and then manually inserting the screw with a digital key or using tools. intraradicular.

For coupling it to the tool we use the prismatic active tip and thus we fix every set that has its coupling object in the patent application “ERGONOMIC TOOL FOR ATRAUMATIC EXODONTIA” - Pl 1001125-0 or any other device / tool that allows the tool to be pulled. intraradicular screw.

Illustration and operation of the "SCREW SCREW TO BE USED FOR EXODONTING TOOL", object of this Patent. The "SCREW SCREW TO BE USED FOR EXODONTING TOOL", object of this Patent, is an innovative and ingenious thread and cut system applied to a piece of tapered shape 15 which can be coupled to other dental extraction tools.

Knife-shaped fillets with curved teeth (3) have been designed to occupy the smallest possible space in the middle and the radius of curvature (1) to allow a perfect transmission of forces to the center of the screw thus preventing expansion or expansion of the screw. root of the tooth, generating minimum 20 efforts required for root extraction or crack generation or fracture.

The three cuts (2) created along the thread fillets have the function of removing the material occupied by the thread fillets and to store the chips generated in the cutting of the thread, thus functioning as a “male”, so that there is no effort and minimizing the chances of causing root expansion.

The accompanying figures suitably illustrate the preferred embodiment of the root screw intra-root screw (Figure 1) so that we can see in detail the screw (P) which has a ball or semicircle grip (1) , which ensures better clamping positioning and more efficient power transmission, three longitudinal cuts (2) on the screw that have the function of cutting the threads (remove the material that will be occupied by the fillets) and store the removed material (chip ), which was generated by cutting, minimizing the axial effort to the root and a 35 threaded knife-shaped fillet with curved angle (3), and could also be straight knife, sawtooth, trapezoidal among others. The screwdriver (figure 2) (C) has a socket (4) for the screw head (P), and may contain a magnet inside that secures the attachment and prevents the parts from loosening easily.

Basically, it is envisaged to use two keys (C) of the same design and purpose, one with a shorter length (5a) for more easily accessible open areas, and a larger one for closed areas having a length (5b) of the same. key to ensuring you can work in smaller spaces.

A hole (6) is provided for the passage of a safety wire, for example dental, ensuring that if the part falls into the patient's mouth there is no risk of swallowing.

In its preferred embodiment, the elements cited in this patent will be used with the tool described in the patent object Pl 1001125-0 entitled "ERGONOMIC TOOL FOR EXTRAMATIC 15" coupling to the pliers described therein, which guarantees the transmission of force evenly and perpendicular to the center of the screw. For this coupling we use a "active tip" (figure 3) in wedge shape and prismatic contact, and the spherical contact or any other form that ensures the formation of support plane with 20 resulting along the screw axis can be used.

The semicircle “head” should be used in conjunction with the active prism-shaped tip shown in figure 3 and, as described above, should be attached to the “tooth puller” pliers.

In figure 3 we can see in detail the contact (7) of the active tip with the semicircle of the screw and the pin (8) of the active tip in the puller pliers.

The coupling of the prism with a semicircle allows the formation of a plane through four support points that transmit the necessary force along the screw axis, remember that it can be in various ways 30 always saving the required degrees of freedom and the transmission. of forces always tending along the axis of the tooth or material to be removed, which may contain 1 or more prisms of simple form or crosspieces that may be of several forms already mentioned, where we can attach to 1 or more intraradicular screws.

However, screw (P) can be used in isolation as well.

Claims (2)

1. “SCREW SCREW TO BE USED FOR EXODONTING TOOL”, which transfers the resulting forces applied to the central axis of the workpiece, thus distributing such effort longitudinally, characterized by the screw (P) having a support (1) for take a ball or semicircle shape, three cuts (2) created along the thread fillets, said knife-shaped fillets with curved teeth (3), fixed manually by the key (C) which has its fixation and transmission of forces through of the active tip. 2. “SCREW SCREW TO BE USED FOR EXODONTING TOOL” according to Claim 1, characterized in that the key (C) has a screw head socket (4), whether or not fitted with a magnet. its interior and extension (5a and 5b) in two different lengths, as well as a hole (6) for passing a safety wire.