ES2373155B1 - SURGICAL SPLIT TO GUIDE THE DRILL OF THE MANDIBULAR OR MAXILAR BONE DURING AN IMPLANTOLOGY INTERVENTION. - Google Patents

Abstract

Surgical splint to guide the mandibular or maxillary bone drill during an implantology intervention, equipped with at least one guide perforation in which a tubular sleeve is housed to guide a burr and which determines a corresponding location and angulation for an implant during surgery, the splint also comprising at least one associated irrigation perforation, which flows into the space between the outlet opening of said tubular sleeve and the mucosa of the implant bed when the splint is placed in an operative position, intended to receive the insertion of irrigation means and through which the implant bed can be irrigated with physiological serum from the outside without interrupting the bone bore or removing the cutter from the tubular sleeve.

Description

Surgical splint to guide the mandibular or maxillary bone drill during an implant surgery. Technical sector of the invention

The invention relates to a surgical splint to guide the mandibular or maxillary bone bore during an implantology intervention. Background of the invention

The drilling of the mandibular or maxillary bone for the subsequent insertion of a threaded rod for the support of a dental prosthesis is a delicate operation, which requires a high degree of precision. It is a known practice to use radiological templates or splints that reproduce the patient's dental arch equipped with means to guide the burr during the drilling operation of the implant bed. In order to determine the exact position and axial orientation of the drill to be carried out, said splints incorporate guide perforations in which cylindrical sheaths, generally metallic, are housed to guide the milling cutter. The position and orientation to be taken by each of said cylindrical sleeves are determined by the physician before each splint is manufactured, which are made to measure for each patient following various procedures, for example by obtaining prior molds or by computer models that partially or totally reproduce the dental arch including the settlements of the missing pieces, intended to be replaced by prosthetic pieces.

Among the important recommendations to ensure optimal implant integration, it is important to avoid excessive heating of the bone during the perforation of the bone bed that can cause protein denaturation and bone necrosis. For this purpose, physiological serum is conventionally provided to the milled bed during the drilling operation.

Although the internal irrigation strawberries, which emit the refrigerant serum through fine holes near its leading edge, are suitable for delivering an adequate volume of serum to the milled bed, sometimes these cannot be used when splints are used as previously described and a remarkable depth of drilling in the bone is required, or when the diameter of the cutter is small. The milling cutters suitable for drilling with these speci fi cations cannot be provided with any cavity for the transport of serum because they would be too fragile and could break. Consequently, when the outer diameter of the milling cutter is adjusted to the inner diameter of the cylindrical sheath and serum cannot be irrigated through the cylindrical sheath, it is necessary to remove the milling cutter from the cylindrical sheath to irrigate, through said cylindrical sheath, The implant bed. Consequently, it is necessary to stop the milling operation and make successive movements of extraction and introduction of the milling cutter through the cylindrical sheath each time it is required to irrigate the implant bed.

It is a main objective of the present invention to provide a solution to the aforementioned drawbacks. A secondary objective of the invention is a splint specially adapted to solve said drawback, applicable to known splints obtainable by any of the known methods to date.

Explanation of the invention.

The surgical splint object of the invention is of the type that reproduces all or part of a dental arch and that comprises peripheral edges and opposite faces, of which one of them is intended to face the dental pieces and the tissue or mucosa of the dental arch, the splint being provided with at least one guide perforation in which a tubular sleeve is housed to guide a burr and which determines a corresponding location and angulation for an implant during surgery.

In essence, the splint is characterized in that it also comprises at least one associated irrigation perforation, which flows into the space between the outlet opening of said tubular sleeve and the mucosa of the implant bed when the splint is placed in the operative position. , intended to receive the insertion of irrigation means and through which the implant bed can be irrigated with physiological serum from the outside without interrupting the bone bore or removing the drill from the cylindrical sleeve.

According to another feature of the invention, the irrigation bore houses a smaller tubular sheath, axially oriented in the direction of the axial extension of the cylindrical sheath.

According to another feature of the invention, the internal diameter in the area of the inlet mouth of the smaller tubular sleeve is suitable for receiving the removable coupling of conventional irrigation means.

According to a variant embodiment, the smaller tubular sheath is cylindrical.

Preferably, the diameter of the smaller, cylindrical tubular sheath is between about 1.2 mm and about 1.8 mm. Brief description of the images

Fig. 1 shows the end of a splint according to the invention, by its buccal or anterior face, opposite the face destined to face the dental pieces or mucosa;

Fig. 2 shows the splint of Fig. 1 seen from its rear face, intended to face the teeth or mucosa;

Fig. 3 shows the splint of Fig. 1, applied on a plaster reproduction of an oral arch; Y

Fig. 4 is a schematic view of a cross section of a splint according to the invention. Detailed description of the drawings

Figs. 1 to 3 show a splint 1 according to the invention that reproduces the dental arch of a patient. In the splint of Figs. 1a3 there are several guide holes for a cutter from which the guide holes 4a and 5a have been pointed out, in each of which a corresponding cylindrical and metal tubular sheath 6 and 7 are arranged, intended to guide the cutter during the drilling operations of the mandibular bone

It is observed in Figs. 1 to 3 that in the vicinity of each of said guide perforations 4a and 5a the splint 1 is provided with irrigation perforations 4b and 5b, through which it is possible to irrigate the implant beds located immediately with physiological serum below the tubular sleeves 6 and 7, respectively, when the splint is placed in the operative position.

Thus, irrigation drilling 4b is associated

to the guide perforation 4a, and ends at the space between the outlet mouth of the is placed in operative position; and the irrigation perforation 5b is in turn associated with the guide perforation 5a, and flows into the space between the outlet opening of the tubular sleeve 7 and the mucosa of the bed of the corresponding implant.

Naturally, it is not only contemplated that the irrigation perforations 4b and 5b are located either in the mouth or in the vestibular, depending on the anatomy of the patient, but also the possibility that the splint 1 of two irrigation perforations can be provided associated to the same guide perforation, arranged one in buccal and one in vestibular or both, coincidentally, in buccal or vestibular. In any case, it is the doctor when designing the splint 1 that decides its number and arrangement depending on other factors of the position of the operator, the assistant and the complexity of each case, with the purpose of not obstructing the surgical field.

In the splint 1 of Figs. 1 to 3, the irrigation perforations 4b and 5b house corresponding smaller, cylindrical tubular sleeves 8 and 9, axially oriented in the direction of the axial extension of the tubular sleeves 6 and 7, also cylindrical in the embodiment, associated.

In these splints, the diameter of the smaller tubular sleeves 8 and 9 is adapted to receive the removable coupling of the end of an irrigation device 10, which can be introduced with some adjustment into any of the smaller tubular sleeves 8 or 9, of so that it can remain plugged into them without the need to manually hold the irrigation device, as shown in Fig. 3.

It should be said that tubular sleeves 6 and 7 can be adapted for guiding strawberries of different external diameter, using known solutions, and that the protection of the splint 1 object of the invention is not conditional on the method by which said splint has been obtained, being irrelevant to the problem here solves the means used for its design, being able to be computer

or more artisanal, or the material of which the splint and tubular covers are made.

Claims (6)

1. Surgical splint (1) to guide the mandibular or maxillary bone drill during an implantology intervention, the splint being those that reproduce all or part of a dental arch and comprises peripheral edges and opposite faces (2, 3) of which one of them is intended to face the dental pieces and the tissue or mucosa of the dental arch, provided with at least one guide perforation (4th, 5th) in which a tubular sleeve (6, 7) is housed to guide a milling cutter and which determines a corresponding location and angulation for an implant during surgery, characterized in that it also comprises at least one associated irrigation perforation (4b, 5b), which flows into the space (a) between the outlet mouth of the said tubular sheath and the mucosa of the implant bed when the splint is placed in an operative position, intended to receive the insertion of irrigation means and through which the lumen can be irrigated Cho of the implant with physiological serum from the outside without interrupting the bone bore or removing the cutter from the tubular sleeve.

2.

Splint (1) according to the preceding claim, characterized in that the irrigation perforation (4b, 5b) houses a smaller tubular sheath (8, 9), axially oriented in the direction of the axial extension of the first associated tubular sheath (6, 7) .

3.

Splint (1) according to claim 2, characterized in that the internal diameter in the area of the inlet opening of the smaller tubular sheath (8, 9) is suitable for receiving the removable coupling of irrigation means (10).

Four.

Splint (1) according to any one of the preceding claims, characterized in that the smaller tubular sheath (8, 9) is cylindrical.

5.

Splint according to the preceding claim, characterized in that the diameter of the smaller cylindrical tubular sheath (8, 9) is between approximately 1.2 mm and approximately 1.8 mm.

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200901055 SPAIN Date of submission of the application: 04/23/2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE RELEVANT DOCUMENTS

 Category

 @ Documents cited  Claims Affected

A A A  US 20090011382 A1 (BAVAR) 08.01.2009, summary; Figures 2-8. US 20050106531 A1 (TANG) 04/19/2005, summary; Figures 12-21. US 6814575 B2 (POIRIER) 09.11.2004, column 2, lines 36-40; figure 12.  1-5 1-5 1-5

  Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

  This report has been produced � for all claims � for claims no:

Date of realization of the report 18.01.2012  Examiner J. López Nieto  Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 200901055 Minimum documentation sought (classification system followed by classification symbols) A61C Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC, WPI State of the Art Report Page 2/4  WRITTEN OPINION Application number: 200901055 Date of Written Opinion: 18.01.2012 Statement

Novelty (Art. 1 LP 11/198)

Claims Claims 1-5 IF NOT

Inventive activity (Art. 8.1 LP11 / 198)

Claims Claims 1-5 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Basis of Opinion.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 200901055 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number Publication Date

D01

US 20090011382 A1 (BAVAR) 08.01.2009

D02

US 20050106531 A1 (TANG) 19.04.0005

D03

US 6814575 B2 (POIRIER) 09.11.2004

2. Statement motivated according to articles 29. and 29.7 of the Regulations for the execution of Law 11/198, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The object of the invention is a surgical splint to guide the mandibular or maxillary bone bore during an implant surgery. Said splint reproduces all or part of the dental arch, comprises peripheral edges and is faced by one of its faces to the dental pieces and the mucosa of the dental arch. It is provided with at least one guide perforation in which a tubular sleeve is housed to guide the burr during surgery. It is characterized in that it has at least one irrigation perforation in which irrigation means are inserted that will irrigate the implant bed with physiological serum from the outside, without interrupting the bone bore or removing the cutter from the tubular sleeve (claims 1- 5) Documents D01-D03 disclose surgical splints to guide the drill in implant surgery operations, all of them totally or partially reproduce the dental arch and have perforations in which tubular sleeves are housed to guide the burr, however, they differ of the splint of the invention in which none of them has its own irrigation means. Documents D01-D03 are part of the state of the art close to the invention, but do not affect their novelty or inventive activity. Therefore, claims 1-5 meet the requirements of novelty and inventive activity within the meaning of Art. 6.1, 8.1 Patent Law 11/86. State of the Art Report Page 4/4