Surgery – Instruments – Light application
Patent
1997-08-18
1999-02-23
Hindenburg, Max
Surgery
Instruments
Light application
606 16, 606 18, A61B 1736
Patent
active
058738754
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns to medical engineering and can be used in surgery, orthopedy and dentistry for processing of soft and hard tissues.
It is known the device for dental tissue laser processing, (patent WO 90/01907, A61C 5/00, date of the publication 08.03.90), comprising the consequently placed along an optical axis the pulsed laser and means of delivery of radiation to a tooth, including a piece of an optical fiber which input is optically conjugated with laser output, and tip which input is optically conjugated with optical fiber's output and its output is the output of device. In this device neodymium, holmium and erbium lasers may be used.
The main disadvantage of above device is that it is impossible to make quick replacement of one laser on other depending on a kind of a tissue under processing, and also high danger of a laser trauma.
It is known also the laser device for the treatment of teeth which is the closest one from the technical point of view and can be accepted as a prototype (patent WO 90/12548, And 61-5/00, date of the publication 01.11.90)
This device comprises the control unit, two pulsed lasers, which optical axes are parallel, focusing system and piece of an optical fiber with a tip placed on an optical axis of the second laser. On the optical axes of both lasers there are mirrors which are optically conjugated with each other, focusing system and optical fiber and placed under 45.degree. angle to laser optical axes. The mirror placed on the axis of the first laser is reflective one, and the mirror placed on the axis of the second laser is dichroic one i.e. it selectively reflects the radiation on first laser wavelength and is transparent on the wavelength of the second laser radiation.
The main disadvantage of this device is the insufficient efficiency of its application while the transition from one type of processing to other and the danger of a laser trauma because of absence of a system providing the detection of tissue that is under processing.
SUMMARY OF THE INVENTION
The problem solved by present invention consists of the creation of the device for laser processing of a tissue performing all kinds of laser operations in surgery, orthopedy and dentistry and keeping the opportunities of quick transition from one type of processing to other and minimum invasion.
The specified problem is solved under the realization of the invention due to achievement of technical result consisting of optimization of processing regimes and parameters of laser radiation depending on a type of processing and a kind of a tissue.
The specified technical result under realization of the invention is achieved due to the device for laser processing of a tissue comprising the control unit which outputs are connected with the laser power supply, pulsed lasers which optical axes are parallel, optically conjugated reflective mirror and mirror that is selectively reflective on the wavelength of the first laser and transparent on the wavelength of the second laser both placed on the axes of the first and the second laser respectively, focusing system and optical fibre with a tip placed on the optical axis of the second laser thus the tip's output is the output of the device additionally comprises at least one detector of the information about status of a tissue that is under laser processing which input is conjugated with the place of laser-tissue interaction and the output is connected to the input of the control unit which outputs are connected to the inputs of electronic switchers placed in the circuits connecting each laser with the power supply. The reflective mirror is removable and focusing system as well the optical fibre with a tip are placed on the optical axis of the first laser so the said tip's output is another optical output of the device.
The specified technical result with more efficiency is achieved due to the device for laser processing of a tissue comprising the control unit which outputs are connected with the laser power supply, pulsed lasers which optic
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Hindenburg Max
Yarnell Bryan K.
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