DE202020107040U1 - Microscrew, accessory and orthodontic anchor - Google Patents

Abstract

Microscrew, characterized in that it comprises a head, a neck and a threaded part which are arranged one behind the other, the threaded part serving to cut bone tissue and piercing the alveolar bone and a holding groove being provided on an end face of the head.

Description

TECHNICAL AREA

The present invention relates to the field of human implantable medical devices, in particular a microscrew, an accessory, and an orthodontic anchor.

STATE OF THE ART

Compared to a traditional orthodontic anchorage, the microscrew can provide absolute anchorage. In the case of a bimaxillary protrusion disease, the tensile force is exerted on the alveolar bone via the microscrew while the anterior teeth are being withdrawn, so that the posterior teeth can hardly move forward and the anterior teeth can largely be withdrawn to improve the protrusion. In the event of illness, when a full set of teeth is set back, the microscrew can also push back the molars well and bring good correction results. With the help of the microscrew, orthodontists can, so to speak, control tooth movement more precisely, regardless of the patient. In addition, the microscrew has advantages of small size and flexible use, etc. It has been widely used clinically since the 1990s and plays an important role in the orthodontic treatment of some complex and serious malocclusions.

To ensure stability, the microscrew implantation site is generally one third of the height of the root tip. In clinical applications, the direction of application is higher, which occasionally leads to an undesirable lowering of the posterior teeth.

It is therefore desirable to develop a microscrew, accessory, and orthodontic anchor to increase the mode of application of the orthodontic anchor and to expand the range of the direction of impingement, which allows the orthodontic anchor to be used more flexibly in clinical orthodontic applications.

CONTENT OF THE PRESENT INVENTION

The object of the invention is to provide a microscrew, an accessory and an orthodontic anchor so that the microscrew can be used more flexibly for orthodontic anchoring in an orthodontic clinic.

To achieve this object, the present invention provides a microscrew comprising a head, a neck and a threaded part which are arranged one behind the other, the threaded part serving to tension a bone tissue and piercing the alveolar bone and a holding groove being provided on an end face of the head .

Optionally, a side face of the head is provided with a ligature hole, the axial direction of which is perpendicular to the longitudinal direction of the microscrew body and which penetrates the head.

The retaining groove is optionally designed as a cylindrical groove, a positioning groove being formed on the side wall of the cylindrical groove, which extends along the axial direction of the cylindrical groove.

Optionally, the head is designed as a regular hexagonal prism, the neck and the threaded part being cylindrical and a free end of the threaded part being a point.

The material of the micro screw for orthodontic anchoring optionally consists of a tantalum alloy.

The present invention provides an accessory for attachment to the aforementioned microscrew. The accessory comprises a holding block and a connecting structure, the connecting structure being arranged at one end of the holding block, with another end of the holding block serving for insertion into the holding groove, the shape of the other end of the holding block being adapted to the shape of the holding groove, wherein the connection structure is used to connect the train component.

Optionally, the connecting structure is a protrusion having a larger diameter end and a smaller diameter end connected to one another, the smaller diameter end being connected to the retaining block and a cruciform groove on the face of the larger diameter end is provided extending from the end face of the larger diameter end down to the end face of the end of the retaining block.

Optionally, the connection structure comprises an extension rod, one end of which is hinged to the support block, and a hook which is attached to the other end of the extension rod.

Optionally, the connection structure is a pull rod, one end of the pull rod being firmly connected to the holding block and the other end the pull rod is provided with an arcuate plug.

Optionally, the connection structure is hat-shaped and latched onto one end of the holding block in order to protect the oral mucosa.

The present invention provides an orthodontic anchor comprising: the microscrew described above and the accessory described above.

• - Einspritzen des Narkotikums an der Implantationsstelle;
• - Eindringen des Gewindeteils des Mikroschraubenkörpers tief in die Implantationsstelle und stoppen, nachdem der Hals des Mikroschraubenkörpers vollständig in das Weichgewebe eingedrungen ist;
• - Drehen des Mikroschraubenkörpers, sodass die Achse des Ligaturlochs horizontal ausgerichtet ist;
• - Einbringen einer geeigneten Menge eines medizinischen Klebers in die Haltenut;
• - Einstecken des anderen Endes des Halteblocks in die Haltenut, sodass das Zubehörteil am Kopf des Mikroschraubenkörpers befestigt wird;
• - Anschließen der kieferorthopädische Zugkomponente an die Verbindungsstruktur eines Endes des Halteblocks.

An orthodontic procedure for using the orthodontic anchor involves the following steps:

• - Injection of the anesthetic at the implantation site;
• - Penetration of the threaded part of the microscrew body deep into the implantation site and stop after the neck of the microscrew body has completely penetrated the soft tissue;
• Rotating the microscrew body so that the axis of the ligature hole is horizontal;
• - inserting a suitable amount of a medical adhesive into the holding groove;
• Inserting the other end of the holding block into the holding groove so that the accessory is attached to the head of the microscrew body;
• - Connecting the orthodontic traction component to the connection structure of one end of the holding block.

1. 1. Die Mikroschraube für die kieferorthopädische Verankerung wird durch den Gewindeteil in den Alveolarknochen implantiert. Die Haltenut der Mikroschraube für die kieferorthopädische Verankerung kann zur Anbringung verschiedener Zubehörteile verwendet werden. Ihr Strukturdesign ist rationell. Und durch Ersetzen des am Kopf der Mikroschraube für die kieferorthopädische Verankerung angebrachten Zubehörteils können die Beaufschlagungsweise und der Bereich der Beaufschlagungsrichtung der Mikroschraube für die kieferorthopädische Verankerung erweitert werden, wodurch die Mikroschraube für die kieferorthopädische Verankerung in klinischen kieferorthopädischen Anwendungen flexibler verwendet werden kann und die unerwünschten Ereignisse eines Mikroschraubenbruchs während der Operation reduziert werden.
2. 2. Das Zubehörteil wird mittels der mechanischen Befestigungskraft zwischen der Haltenut und dem Halteblock und der chemischen Haftkraft des medizinischen Klebers am Kopf des Mikroschraubenkörpers angebracht, wobei die Zugkomponente für die kieferorthopädische Verankerung durch die Verbindungsstruktur am Zubehörteil angebracht wird. Das Zubehörteil kann nur entfernt und durch ein bedarfsgerechtes Zubehörteil ersetzt werden, wenn die Beaufschlagungsweise oder die Beaufschlagungsrichtung verändert werden soll.
3. 3. Der Mikroschraubenkörper wird durch den Gewindeteil in den Alveolarknochen implantiert. Das Zubehörteil wird mittels der mechanischen Befestigungskraft zwischen der Haltenut und dem Halteblock und der chemischen Haftkraft des medizinischen Klebers am Kopf des Mikroschraubenkörpers angebracht, wobei die Zugkomponente für die kieferorthopädische Verankerung durch die Verbindungsstruktur am Zubehörteil angebracht wird. Das Zubehörteil kann nur entfernt und durch ein bedarfsgerechtes Zubehörteil ersetzt werden, wenn die Beaufschlagungsweise oder die Beaufschlagungsrichtung verändert werden soll. Ihr Strukturdesign ist rationell. Und durch Ersetzen verschiedener Zubehörteile können die Beaufschlagungsweise und der Bereich der Beaufschlagungsrichtung der Mikroschraube für die kieferorthopädische Verankerung erweitert werden, wodurch die Mikroschraube für die kieferorthopädische Verankerung in klinischen kieferorthopädischen Anwendungen flexibler verwendet werden kann und die unerwünschten Ereignisse eines Mikroschraubenbruchs während der Operation reduziert werden.

The present invention has the following advantageous effects:

1. 1. The micro screw for orthodontic anchoring is implanted into the alveolar bone through the threaded part. The orthodontic anchor micro screw retaining groove can be used to attach various accessories. Their structural design is rational. And by replacing the accessory attached to the head of the micro screw for orthodontic anchorage, the loading manner and the range of the direction of impingement of the micro screw for orthodontic anchorage can be expanded, whereby the micro screw for orthodontic anchorage can be used more flexibly in clinical orthodontic applications and the adverse events microscrew breakage during surgery.
2. 2. The accessory is attached to the head of the microscrew body by the mechanical fastening force between the holding groove and the holding block and the chemical adhesive force of the medical adhesive, and the tensile component for orthodontic anchoring is attached to the accessory through the connecting structure. The accessory can only be removed and replaced by a needs-based accessory if the way or direction of application is to be changed.
3. 3. The micro screw body is implanted into the alveolar bone through the threaded part. The accessory is attached to the head of the microscrew body by means of the mechanical fastening force between the holding groove and the holding block and the chemical adhesive force of the medical adhesive, with the tensile component for orthodontic anchoring being attached to the accessory through the connecting structure. The accessory can only be removed and replaced by a needs-based accessory if the way or direction of application is to be changed. Their structural design is rational. And by replacing various accessories, the loading manner and the range of loading direction of the orthodontic anchor microscrew can be expanded, which allows the orthodontic anchor microscrew to be used more flexibly in clinical orthodontic applications and reduces the undesirable occurrences of microscrew breakage during surgery.

Further features and advantages of the present invention are described in more detail in the specific embodiments.

Figure list

• 1 zeigt eine konstruktive schematische Darstellung des Mikroschraubenkörpers gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.
• 2 zeigt eine Draufsicht auf den Mikroschraubenkörper gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.
• 3 zeigt eine konstruktive schematische Darstellung des Zubehörteils gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.
• 4 zeigt eine konstruktive schematische Darstellung des Zubehörteils gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.
• 5 zeigt eine konstruktive schematische Darstellung des Zubehörteils gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.
• 6 zeigt eine konstruktive schematische Darstellung des Zubehörteils gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like parts in the exemplary embodiments are labeled with identical reference numerals.

• 1 shows a structural schematic representation of the microscrew body according to an embodiment of the present invention.
• 2 FIG. 10 shows a top view of the microscrew body according to an embodiment of the present invention.
• 3 shows a structural schematic representation of the accessory according to an embodiment of the present invention.
• 4th shows a structural schematic representation of the accessory according to an embodiment of the present invention.
• 5 shows a structural schematic representation of the accessory according to an embodiment of the present invention.
• 6th shows a structural schematic representation of the accessory according to an embodiment of the present invention.

List of reference symbols

1.

Head;

1.1

Retaining groove;

1.2

Ligature hole;

2.

Neck;

3.

Threaded part;

4th

Holding block;

5.

Connection structure.

DETAILED DESCRIPTION

The preferred embodiments of the present invention are described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be embodied in various forms and is not intended to be limited to the embodiments described herein. Rather, these embodiments are provided to make the present invention more clear and complete, and to fully convey the scope of the present invention to those skilled in the art.

The present invention provides a microscrew comprising a head, a neck and a threaded part which are arranged one behind the other, the threaded part serving for tensioning a bone tissue and piercing the alveolar bone and a holding groove being provided on an end face of the head.

In particular, the micro-screw for orthodontic anchoring is implanted into the alveolar bone through the threaded part. The orthodontic anchor micro screw retaining groove can be used to attach various accessories. Their structural design is rational. And by replacing the accessory attached to the head of the microscrew for orthodontic anchorage, the loading manner and the range of the impingement direction of the microscrew for orthodontic anchorage can be expanded, whereby the microscrew for orthodontic anchorage can be used more flexibly in clinical orthodontic applications and the adverse events microscrew breakage during surgery.

Optionally, a side face of the head is provided with a ligature hole, the axial direction of which is perpendicular to the longitudinal direction of the microscrew body and which penetrates the head.

In particular, a ligature hole is used to pass the ligature thread through, and when it is used, the axial direction of the ligature hole should be kept horizontal in order to facilitate the lateral passage of the ligature thread.

The retaining groove is optionally designed as a cylindrical groove, a positioning groove being formed on the side wall of the cylindrical groove, which extends along the axial direction of the cylindrical groove.

In particular, the holding groove is cylindrical in order to facilitate the assembly of the holding block, a positioning groove being arranged on the side wall of the cylindrical groove, which can prevent the rotation of the holding block in the holding groove.

Optionally, the head is designed as a regular hexagonal prism, the neck and the threaded part being cylindrical and a free end of the threaded part being a point.

In particular, the threaded part is used to tension bone tissue and pierce the alveolar bone so that the free end is a point.

The material of the micro screw for orthodontic anchoring optionally consists of a tantalum alloy.

In particular, the microscrew usually used clinically consists of a tantalum alloy. Due to insufficient rigidity, accidents due to broken microscrews occasionally occur during surgery. Therefore, a tantalum metal material which has high rigidity and good biological safety can be used, thereby improving the stability of the screw for orthodontic anchoring, expanding the clinical application range of the screw for orthodontic anchoring and reducing the undesirable events of a Micro screw breakage during surgery can be reduced.

The present invention provides an accessory for attachment to the aforementioned microscrew. The accessory comprises a holding block and a connecting structure, the connecting structure being arranged at one end of the holding block, with another end of the holding block serving for insertion into the holding groove, the shape of the other end of the holding block being adapted to the shape of the holding groove, wherein the connection structure is used to connect the train component.

Specifically, the accessory is attached to the head of the microscrew body by means of the mechanical fastening force between the holding groove and the holding block and the chemical adhesive force of the medical adhesive, the tensile component for orthodontic anchoring being attached to the accessory through the connecting structure. The accessory can only be removed and replaced by a needs-based accessory if the way or direction of application is to be changed.

Optionally, the connecting structure is a protrusion having a larger diameter end and a smaller diameter end connected to one another, the smaller diameter end being connected to the retaining block and a cruciform groove on the face of the larger diameter end is provided extending from the end face of the larger diameter end down to the end face of the end of the retaining block.

Optionally, the connection structure comprises an extension rod, one end of which is hinged to the support block, and a hook which is attached to the other end of the extension rod.

Optionally, the connecting structure is a pull rod, one end of the pull rod being firmly connected to the holding block and the other end of the pull rod being provided with an arcuate plug.

Optionally, the connection structure is hat-shaped and latched onto one end of the holding block in order to protect the oral mucosa.

In particular, the design of the accessory with different connection structures allows the type of loading and the area of the loading direction of the microscrew to be expanded so that the microscrew can be used more flexibly in clinical orthodontic applications. If the loading method or direction needs to be changed, only the accessory on the head of the microscrew body needs to be replaced. There is no need to remove the microscrew or re-implant a new microscrew, reducing the number and steps of orthodontic surgery.

The present invention provides an orthodontic anchor with the microscrew and accessory described above.

• - Einspritzen des Narkotikums an der Implantationsstelle;
• - Eindringen des Gewindeteils des Mikroschraubenkörpers tief in die Implantationsstelle und Stoppen, nachdem der Hals des Mikroschraubenkörpers vollständig in das Weichgewebe eingedrungen ist;
• - Drehen des Mikroschraubenkörpers, sodass die Achse des Ligaturlochs horizontal ausgerichtet ist;
• - Einbringen einer geeigneten Menge eines medizinischen Klebers in die Haltenut;
• - Einstecken des anderen Endes des Halteblocks in die Haltenut, sodass das Zubehörteil am Kopf des Mikroschraubenkörpers befestigt wird;
• - Anschließen der kieferorthopädische Zugkomponente an die Verbindungsstruktur eines Endes des Halteblocks.

An orthodontic procedure for using the orthodontic anchor involves the following steps:

• - Injection of the anesthetic at the implantation site;
• Penetration of the threaded portion of the microscrew body deep into the implantation site and stopping after the neck of the microscrew body has completely penetrated the soft tissue;
• Rotating the microscrew body so that the axis of the ligature hole is horizontal;
• - inserting a suitable amount of a medical adhesive into the holding groove;
• Inserting the other end of the holding block into the holding groove so that the accessory is attached to the head of the microscrew body;
• - Connecting the orthodontic traction component to the connection structure of one end of the holding block.

In particular, the microscrew body is implanted into the alveolar bone through the threaded part. The accessory is attached to the head of the microscrew body by means of the mechanical fastening force between the holding groove and the holding block and the chemical adhesive force of the medical adhesive, with the tensile component for orthodontic anchoring being attached to the accessory through the connecting structure. The accessory can only be removed and replaced by a needs-based accessory if the way or direction of application is to be changed. Their structural design is rational. And by replacing various accessories, the loading manner and the range of the loading direction of the orthodontic anchor microscrew can be expanded, which allows the orthodontic anchor microscrew to be used more flexibly in clinical orthodontic applications and the adverse events microscrew breakage during surgery.

If the correction method changes in the orthodontic process and the accessory needs to be replaced, the accessory is removed directly, another suitable accessory selected and the same method used for retention.

Example of execution

1 shows a structural schematic representation of the micro-screw body according to the invention. 2 shows a plan view of the micro-screw body according to the invention. 3-6 each show structural schematic representations of four accessories according to the invention.

• Das Material des Mikroschraubenkörpers ist Tantal. Wie in den 1 und 2 gezeigt, umfasst er einen Kopf 1, einen Hals 2 und einen Gewindeteil 3, die hintereinander angeordnet sind. An der Stirnfläche des Kopfs 1 ist eine Haltenut 1.1 angeordnet. Die Achsrichtung des Ligaturlochs 1.2 ist senkrecht zur Längsrichtung des Mikroschraubenkörpers und das Ligaturloch 1.2 durchdringt den Kopf.

The orthodontic anchor of the present invention comprises a microscrew and four accessories, the microscrew comprising:

• The material of the micro screw body is tantalum. As in the 1 and 2 shown, it includes a head 1 , a neck 2 and a threaded part 3 that are arranged one behind the other. On the face of the head 1 is a holding groove 1.1 arranged. The axial direction of the ligature hole 1.2 is perpendicular to the longitudinal direction of the microscrew body and the ligature hole 1.2 penetrates the head.

Each of the four accessories includes a holding block 4th and a connection structure 5 . The shape of the holding block corresponds to the holding groove 1.1 . The connection structure 5 is at one end of the holding block 4th arranged. The other end of the holding block is used to insert into the holding groove 1.1 . The connection structure 5 serves to connect the train component.

For the first accessory, as in 3 shown is its connection structure 5 a protrusion having a larger diameter end and a smaller diameter end connected to each other, the smaller diameter end being connected to the support block and a cruciform groove being provided on the face of the larger diameter end which extends downwardly from the face of the larger diameter end onto the face of the end of the support block.

The second accessory, as in 4th shown includes its connection structure 5 an extension rod, one end of which is hinged to the support block, and a hook which is attached to the other end of the extension rod.

The third accessory, as in 5 shown is its connection structure 5 a pull rod, one end of the pull rod being fixedly connected to the holding block and another end of the pull rod being provided with an arcuate plug.

The fourth accessory, as in 6th shown is its connection structure 5 hat-shaped and snapped into place at one end of the holding block to protect the oral mucosa.

In this exemplary embodiment, the head of the micro-screw body is a regular hexagonal prism with an edge length of 1.25 mm. The neck 2 is a smooth cylinder with a diameter of 1.7 mm and a length of 2 mm. The threaded part 3 is also cylindrical and the free end of the threaded part is a point. The thread pitch of the threaded part is 0.5 mm. The small diameter of the threaded part is 1.2 mm. The large diameter of the threaded part is 1.6 mm. The thread depth is 0.2 mm. The length of the threaded part 3 is determined according to actual clinical needs. The retaining groove 1.1 is a cylindrical groove with a depth of 1.5 mm. A trapezoidal positioning groove is arranged on the side wall of the cylindrical groove and extends through the cylindrical groove in the axial direction of the cylindrical groove. The diameter of the ligature hole 1.2 is 0.6mm.

In this embodiment, the shape of the holding block corresponds 4th the retaining groove 1.1 comprising a cylinder and a pair of positioning projections arranged on the side surface of the cylinder, the positioning projections being trapezoidal and extending along the side surface of the cylinder in the axial direction of the cylinder.

The structural design of the orthodontic anchor of the present invention is rational. And by attaching the accessories with different connection structures, the loading manner and the range of the loading direction of the microscrew can be expanded, which allows the microscrew to be used more flexibly in clinical orthodontic applications and reduces the undesirable events of microscrew breakage during surgery.

• - Einspritzen des Narkotikums an der Implantationsstelle;
• - Eindringen des Gewindeteils des Mikroschraubenkörpers tief in die Implantationsstelle und Stoppen, nachdem der Hals des Mikroschraubenkörpers vollständig in das Weichgewebe eingedrungen ist;
• - Drehen des Mikroschraubenkörpers, sodass die Achse des Ligaturlochs horizontal ausgerichtet ist;
• - Einbringen einer geeigneten Menge eines medizinischen Klebers in die Haltenut;
• - Einstecken des anderen Endes des Halteblocks in die Haltenut, sodass das Zubehörteil am Kopf des Mikroschraubenkörpers befestigt wird;
• - Anschließen der kieferorthopädische Zugkomponente an die Verbindungsstruktur eines Endes des Halteblocks.

An orthodontic procedure also includes the following steps:

• - Injection of the anesthetic at the implantation site;
• Penetration of the threaded portion of the microscrew body deep into the implantation site and stopping after the neck of the microscrew body has completely penetrated the soft tissue;
• Rotating the microscrew body so that the axis of the ligature hole is horizontal;
• - inserting a suitable amount of a medical adhesive into the holding groove;
• Inserting the other end of the holding block into the holding groove so that the accessory is attached to the head of the microscrew body;
• - Connecting the orthodontic traction component to the connection structure of one end of the holding block.

After implantation of the micro screw for orthodontic anchoring, the appropriate accessory for this treatment stage is selected in use. By the mechanical fastening force between the holding groove and the holding block and by means of the chemical adhesive force of the medical adhesive, the accessory can be fastened to the head of the micro screw for orthodontic anchoring, and then the force load is applied according to the clinical need. The relevant accessory can be replaced when entering the next treatment stage and fixed in the same way.

The embodiments of the present invention have been described above. The description is exemplary, non-exhaustive and not restricted to the disclosed embodiments. Many changes and variations will become apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims (11)

Microscrew, characterized in that it comprises a head, a neck and a threaded part which are arranged one behind the other, the threaded part serving to cut bone tissue and piercing the alveolar bone and a holding groove being provided on an end face of the head. Micro screw after Claim 1 , characterized in that a side surface of the head is provided with a ligature hole, the axial direction of which is perpendicular to the longitudinal direction of the micro-screw body and which penetrates the head. Micro screw after Claim 1 , characterized in that the retaining groove is designed as a cylindrical groove, a positioning groove being arranged on the side wall of the cylindrical groove, which extends along the axial direction of the cylindrical groove. Micro screw after Claim 1 , characterized in that the head is designed as a regular hexagonal prism, the neck and the threaded part being cylindrical and a free end of the threaded part being a point. Micro screw after Claim 1 , characterized in that the material of the micro screw for orthodontic anchoring consists of a tantalum alloy. Accessory for attachment to a microscrew according to one of the Claims 1 to 5 , characterized in that the accessory has a holding block and a connecting structure, the connecting structure being arranged at one end of the holding block, another end of the holding block being used for insertion into the holding groove, the shape of the other end of the holding block being adapted to the shape of the Holding groove is adapted, the connection structure being used to connect the tension component. Accessory according to Claim 6 , characterized in that the connecting structure is a protrusion having a larger diameter end and a smaller diameter end connected to each other, the smaller diameter end being connected to the support block and wherein on the face of the larger end Diameter a cross-shaped groove is provided which extends from the end face of the end with the larger diameter down to the end face of the end of the holding block. Accessory according to Claim 6 , characterized in that the connecting structure comprises an extension rod, one end of which is hinged to the support block, and a hook which is attached to the other end of the extension rod. Accessory according to Claim 6 , characterized in that the connection structure is a pull rod, one end of the pull rod being fixedly connected to the holding block and the other end of the pull rod being provided with an arcuate plug. Accessory according to Claim 6 , characterized in that the connection structure is hat-shaped and is latched at one end of the holding block in order to protect the oral mucosa. Orthodontic anchorage, characterized in that it is a micro screw after one of the Claims 1 to 5 and an accessory according to one of the Claims 6 to 10 includes.

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