EP0748187A1 - Cooled drill bushing - Google Patents

Cooled drill bushing


Publication number
EP0748187A1 EP95904373A EP95904373A EP0748187A1 EP 0748187 A1 EP0748187 A1 EP 0748187A1 EP 95904373 A EP95904373 A EP 95904373A EP 95904373 A EP95904373 A EP 95904373A EP 0748187 A1 EP0748187 A1 EP 0748187A1
European Patent Office
Prior art keywords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Application number
Other languages
German (de)
French (fr)
Robert Frigg
Robert Schavan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AO Technologies AG
Original Assignee
AO Technologies AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AO Technologies AG filed Critical AO Technologies AG
Priority to PCT/CH1995/000003 priority Critical patent/WO1996020650A1/en
Publication of EP0748187A1 publication Critical patent/EP0748187A1/en
Application status is Withdrawn legal-status Critical



    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17Guides or aligning means for drills, mills, pins or wires


Described is a drill bushing for use in osteosynthesis, in particular for drilling, cutting threads and inserting implants. It has an upper end (1), designed to insert an instrument or implant, and a lower end (2) which can be placed on the bone. Positioned near the upper end (1) is a coolant connection point (3) by means of which coolant can be passed into the bushing.


coolable drill sleeve

The invention relates to a drill sleeve, according to the preamble of claim 1.

Drill bushings found for osteosynthesis in a wide range applications, both for drilling, tapping and partly to the introduction of bone screws, Kirschner wires, Schanz screws or Steinmann nails. There are multiple reasons for that. In an osteosynthesis with public access Drill bushings prevent the winding of the soft tissue Gewebeε the rotating instrument. More prevent slipping of the rotating instrument and are used in operations such as drilling, tapping and inserting the Implantateε, as a guide. In plate osteosynthesis, they serve the determination of the correctly mounted borehole in the plate hole by a specially adapted shape of the plate symmetry. In osteosynthesis with stab incision, such as, for example, upon application of an external fixator, drill sleeves are supplemented by a trocar, the determination of a constant drilling and Insertionskanales. This causes the soft tissues, which are invisible under the skin protected. After determination of the "working channel", various instruments and implants (drills, taps, ängenmessgerät) (screw, Kirschner wire, Schanz screw, Steinmann pin) can be inserted through the drill sleeve, without changing the position of the drill sleeve.

The special shape of the drill sleeve, adapted to the different implants and various surgical techniques for a variety of internal fixation, there are a variety of drill sleeves types, but which all have the same task. As an example, EP-Al 0,460,447 can be cited, showing a compression drill guide, especially for plate osteosynthesis.

A disadvantage of this and other drill guides according to the prior art is encountered during drilling and insertion of the implants significant frictional heat. In the machining of the bone by drilling or tapping, a large proportion of the mechanical work is converted to heat. The same applies to the insertion of implants, since the heat generated by the friction between the implant and bone. This heat can lead to thermal damage to the bone or soft tissue tissue.

In other areas trying to prevent this heat by internally cooled drill. However, this method to be able to take over for the osteosynthetic area, would be a very complex and expensive rebuilding of both the instruments and the drilling necessary. therefore it was necessary to look for other solutions. The invention aims to provide a remedy. The invention has for its object to provide a Bohrbüchεe in which the coolant is directly introduced into the drill sleeve so dasε the Bohrmaεchine be converted müεsen neither the instruments nor.

The invention achieves this object with a Bohrbüchεe having the features of Anspruchε. 1

The invention läsεt εich realized in verεchiedene species where daε coolant is introduced but always directly into the drill sleeve. The erzieltbare with the invention advantage is due to the fact that in this way daε coolant welcheε auε phyεiologischer Kochεalzlösung or beεteht from Ringerlöεung, passes directly to the Arbeitεbereich and thus leads to an immediate and effective temperature reduction.

Auεführungεbeispiele the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1 shows a longitudinal section through the erfindungsgemäεεe Bohrbüchεe;

Fig. 2 represents a cross section along the line II-II in Figure l represents - Fig. 3 illustrates a Längsεchnitt is by a double-walled Bohrbüchεe, -. And

Fig. 4 εtellt a Querεchnitt längε the line IV-IV in Fig. 3 illustrates.

The drill guide illustrated in Fig. 1 beεteht in weεentlichen auε a hollow cylinder 7, which has a handle grip 9. The hollow cylinder 7 beεitzt placeable a obereε end 1 imposing a Instrumenteε or Implantatε and a untereε to the bone, designed as a serrated crown end 2. The grip handle 9 is formed alε Kühlmittelanεchluεε 3 and weiεt to dieεem purpose a passage extending inside channel 4, through which the coolant is directly introduced in Bohrbüchεe daε interior. 5 The Kühlmittelanεchluss 3 weiεt a Anεchlusεstutzen 11 for a hose, so that by means of a syringe coolant can be introduced into the drill sleeve, the welcheε Inεtrument cooled daε implant and the bone.

As dargeεtellt in Fig. 2, the hollow cylinder 7 the longitudinal grooves 6 to facilitate the circulation of the coolant in the interior 5 of the drill sleeve. However, it is also possible to dispense with εolche longitudinal grooves 6; only musε be vergröεεert daε game of Hohlzylinderε 7 in Verhältniε to Inεtrument used so that a sufficient amount of coolant iεt introduced. In FIGS. 3 and 4, a double-walled Auεführung the Bohrbüchεe iεt dargeεtellt. It is the same structure as the Auεführung according to Fig. 1, only that a further hollow cylinder 8 is arranged in the hollow cylinder 7, so that a cavity 10 is formed between the two hollow cylinders 7.8, the deε with the channel 4 the handle εteht in compound 9 and in which coolant can be initiated by the Kühlmittelanschluεε third


1. drill guide for osteosynthetic purposes, particularly for drilling, tapping and insertion of implants, having an upper end (1) for the introduction of an instrument or implant, and a lower to the bone can be placed end (2), characterized by a region of the upper end (1) positioned Kühlmittelanschluεs (3) with which the coolant is introduced into the drill sleeve.
2. Bohrbüchεe according Anεpruch l, characterized in that the Kühlmittelanεchluεε (3) daεε with a channel (4) iεt verεehen, iεt daε through which coolant directly in daε interior (5) of the Bohrbüchεe introduced.
3. Bohrbüchεe according to claim 2, characterized in that the interior (5) of the drill guide with longitudinal grooves (6) is provided.
is formed 4. drill sleeve according to claim 1, characterized in that in the hollow cylinder (7), a further hollow cylinder (8) is arranged, εo daεε zwiεchen the two hollow cylinders (7,8), a cavity (10) (with the Kühlmittelanεchlusε 3 ) communicates.
5. Bohrbüchεe according to one of Anεprüche l biε 4, characterized in that the Kühlmittelanεchluεs (3) dasε as a handle (9) auεgebildet iεt, the aufweiεt a channel (4) for the passage deε Kühlmittelε.
EP95904373A 1995-01-06 1995-01-06 Cooled drill bushing Withdrawn EP0748187A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CH1995/000003 WO1996020650A1 (en) 1995-01-06 1995-01-06 Cooled drill bushing

Publications (1)

Publication Number Publication Date
EP0748187A1 true EP0748187A1 (en) 1996-12-18



Family Applications (1)

Application Number Title Priority Date Filing Date
EP95904373A Withdrawn EP0748187A1 (en) 1995-01-06 1995-01-06 Cooled drill bushing

Country Status (3)

Country Link
EP (1) EP0748187A1 (en)
JP (1) JPH09510134A (en)
WO (1) WO1996020650A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU9553698A (en) * 1997-10-09 1999-05-03 Nenad Sesic Strain-inducing conical screw for stimulating bone transplant growth
WO2003057051A1 (en) * 2002-01-09 2003-07-17 Synthes Ag Chur Device for drilling or for inserting implants
US7731721B2 (en) 2003-07-16 2010-06-08 Synthes Usa, Llc Plating system with multiple function drill guide
US20050049595A1 (en) 2003-09-03 2005-03-03 Suh Sean S. Track-plate carriage system
US7909860B2 (en) 2003-09-03 2011-03-22 Synthes Usa, Llc Bone plate with captive clips
EP3112062A1 (en) * 2015-06-30 2017-01-04 Seco Tools Ab A cutting tool

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320999A (en) * 1980-03-13 1982-03-23 Briese Leonard A Coolant guide for end mill
DE3609122C1 (en) * 1986-03-15 1987-08-13 Mecron Med Prod Gmbh A rotary cutting tool for surgical purposes
CH681421A5 (en) * 1990-06-06 1993-03-31 Synthes Ag
JPH0585535U (en) * 1992-04-20 1993-11-19 株式会社日研工作所 The tool holder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
See references of WO9620650A1 *

Also Published As

Publication number Publication date
WO1996020650A1 (en) 1996-07-11
JPH09510134A (en) 1997-10-14

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Effective date: 19960624

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17Q First examination report

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18D Deemed to be withdrawn

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