JPH05309101A - Dental treatment device - Google Patents

Abstract

PURPOSE:To carry out the treatment process, the positioning, and the form measuring by a single machine, and to carry out the processing while measuring, as to a dental treatment device. CONSTITUTION:A multijoint holding handle 3 which can control the positioning freely is provided to a stand 2, a laser oscillator 4 held to the holding handle 3 and to radiate lasers, or an optical fiber 5 to lead and guide from the laser oscillator is provided to the holding handle 3, and a measuring device 6 to measure the three-dimensional form by utilizing the reflection beams by the radiating lasers is provided, so as to form this dental treatment device, and the treatment and the measurement are carried out concurrently by the radiating lasers. During the treatment, a cooling and washing water is fed from a pump device 7 through a hose 8, and the washing solution in the mouth is sucked and exhausted to an exhaust solution tank 11 by a suction pump 12 through a hose 13.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dental treatment device.

[0002]

2. Description of the Related Art Conventionally, various tools having suitable blades have been used for caries processing, dentin processing, bone tissue processing and the like. For example, for treatment of roots caused by exposure of dentin due to abrasion of the gums, after removing the affected area, dentin adhesive is applied, and visible light is irradiated onto it to cure and bond in a short time. Let In addition, in order to restore a missing tooth, natural teeth remaining on both sides are scraped and a fixed bridge is mounted between them.

These processes require careful attention and skill of the dentist. That is, it may cause serious damage to various anatomical structures adjacent to the implants such as cavities, nerves, and alveolar canals, and also to the natural tooth structure adjacent to the alveolar crest, so that it is always accurate. It requires a great deal of skill and skill to get a perfect position and to process while avoiding that position with a thin blade.

For this reason, the dental treatment apparatus requires various kinds of precise processing means and positioning measuring means, but in the past, an optimum apparatus has not been proposed yet.

SUMMARY OF THE INVENTION In view of the above points, the present invention has an object of providing a precise treatment apparatus capable of performing machining or treatment, positioning with a single machine, shape measurement, and machining while measuring. To do.

[0005]

A laser head for irradiating a laser and a measuring device for detecting a moving position of the laser irradiating head to measure a three-dimensional shape are provided to perform both processing and measurement by the irradiating laser. It is characterized by doing so.

[0006]

According to the present invention, since the laser is used for the dental processing and the three-dimensional shape measurement as described above, various kinds of dental processing, adhesive curing treatment, etc. can be performed by the laser, and the processed shape can be changed. It can be processed while measuring.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. In FIG. 1, reference numeral 1 is a carrier with casters which can be freely moved, and a stand 2 is provided vertically to the carrier. Three
Is a support handle provided on the stand 2 so as to be movable up and down, and its position can be freely controlled by rotating, swinging, etc. by the multi-joints 31, 32, 33. Reference numeral 4 denotes a laser oscillator attached to the stand 2, which is guided by the optical fiber 5 to the positioning tip of the articulated support handle 3. Reference numeral 6 is a measuring device for measuring a three-dimensional shape by a triangulation method or the like using reflected light from an irradiation laser, and is equipped with a CRT for displaying measured values. 7 is a pump device for supplying water or air, which is a cargo bed 1
And is supplied to the tip nozzle of the support handle 3 by the supply hose 8. Reference numeral 9 is a bed for positioning and fixing the patient to be treated, and the reference position of the head is detected by the positioning 10, and the detection signal is fed back to the measuring device 6 to perform the reference positioning. 11 is a drainage tank, which has an absorption pump 12,
The cleaning solution in the vagina is sucked and discharged by the hose 13.

The output power of the laser oscillator 4 can be switched and controlled in several stages, and 100 Jou can be used for bone processing and the like.
and roughing ls / cm ² energy of about 10 to 30
Finishing is performed at approximately Joules / cm ² . The shape dimension and the like finished by this laser processing are measured by laser irradiation under the finishing power condition. The triangulation method can be used for this three-dimensional shape measurement. That is, this triangulation is a PS that forms a biaxial optical system in which the light projecting system and the light receiving system are provided at an angle, and detects the position of the light spot on the reflected light axis.
Displacement is measured by providing D or CCD.

For such laser processing and shape measurement, the tip portion is irradiated with laser while directing the multi-joint positioning control of the support handle 3 to the tooth or bone to be treated in the oral cavity. During the processing, the pump 7 is driven to inject water or air to the processing site, and the therapeutic processing is performed while cooling and cleaning. Further, the shape measurement is performed by injecting air or the like to remove moisture and the like at the measurement site to make it sufficiently dry and lowering the irradiation laser power. Measuring device 6 is PSD
A digital signal obtained by A / D converting the signal from the detector is received, the CPU performs linear correction, average processing, arithmetic processing such as division, the processed data is stored in memory, and the measurement points are moved sequentially. While measuring the data repeatedly. The measured values can be sequentially displayed on the CRT, and the three-dimensional shape signal can be arithmetically processed together with the position information of the measuring points, and the arithmetic output can be sent to the printer to create a three-dimensional NC tape. This tape can be used for NC processing of tooth molds.

FIG. 2 shows another embodiment in which the processed portion is enlarged.
A guide nozzle 14 is provided at the tip of the support handle 3. The guide nozzle has a tapered taper surface, and the laser guided by the optical fiber 5 is focused while repeating reflection on the taper surface to irradiate a circular beam having a high circularity. Therefore, the processing accuracy of the recess of the tooth 15 and the measurement accuracy can be further improved, and the therapeutic effect is improved.

In the shape measurement using the reflected light, the measurement accuracy can be improved by detecting the reflected light having a wavelength different from the irradiation beam having the predetermined wavelength. For example,
An infrared ray having a wavelength of about 3 to 5 μm different from the irradiation light is detected. That is, the point irradiated with the laser beam rapidly rises in temperature and emits infrared rays. The reflected light of a specific wavelength can be detected by selectively detecting this infrared ray with an infrared sensor having a wavelength range or by detecting it through an infrared filter. According to this infrared detection, when the reflected light of the same wavelength as the irradiated wavelength is directly detected, the measurement error caused by detecting the irregularly reflected light due to the secondary or tertiary reflection on the inclined surface or the uneven surface is caused. It can be reduced and precise measurement can be performed.

In this shape measurement, the positioning control of the support handle 3 is driven by a motor such as rotation and feed, and this motor is driven by NC control to position the measurement site and the irradiation point of the laser beam. The control can be controlled precisely, which allows the position information of the measurement point to be obtained accurately,
Therefore, the three-dimensional shape signal can be accurately calculated and output.

FIG. 3 shows another embodiment of the laser irradiation nozzle in which a guide nozzle 16 is supported at the tip. The guide nozzle 16 also has a tapered taper surface, but the cooling water supply hose 8 supplied from the pump 7 is connected to the nozzle 16 so as to also serve as a jet of cooling water, and an optical fiber is introduced into this water. Drive the laser guided by 5. Similarly, the laser converges while repeatedly reflecting on the tapered surface of the nozzle 16 and can irradiate a highly accurate circular beam, and at the same time, the cooling water can be concentrated and jetted and supplied to the laser irradiation position without scattering. it can.

The injection port of the guide nozzle 16 is 0.1 to 1 m.
m, the cooling water sprayed by this is about 0.1-2a
Supply at a pressure of about tm that does not scatter to the surroundings. The cooling effect of the cooling water increases the cooling effect of the processed part, and stable and safe processing is possible, and the laser propagates with the jet water column as an optical guide.
It is possible to propagate and irradiate a laser beam having an energy density of about uls / cm ^{2 at} a speed of about 5 m / s to a nozzle having a diameter of 1 mmφ and a length of 5 mm with a transmission capacity of about 95% or more. For this reason, the irradiation laser irradiates a single pulse having a pulse width of about 0.5 to 150 μs by PWM control, and repeated irradiation with a frequency of about 1 to 100 kHz can be easily irradiated without loss.

The inner surfaces of the guide nozzles 14 and 16 have A
It is possible to enhance the light reflection effect and improve the transmission performance by using a mirror finish by plating with 1 or Au.

[0016]

As described above, according to the present invention, the treatment of the dentistry and the measurement of the three-dimensional shape are performed by using the laser beam. Since the processing shape can be measured and the processing can be performed, precise and accurate treatment can be performed.

Further, by providing a guide nozzle for laser irradiation and irradiating while squeezing with the guide nozzle, scattering of the light beam can be prevented, and precise irradiation, treatment processing and precise measurement can be performed.

Further, when machining while jetting cooling water,
A guide nozzle is provided at the tip, the cooling water is supplied and jetted to the nozzle, and a laser beam is struck and irradiated to a water column to improve laser focusing,
In addition, it is possible to prevent the scattering of the cooling water and supply it in a concentrated manner, and it is possible to easily perform precision processing. Moreover, the laser propagates through the water column with enhanced transmissivity and can irradiate high energy in a pulsed manner without any loss, which enables treatment with improved processing performance.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a partial structural diagram of another embodiment of the present invention.

FIG. 3 is a partial structural diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Loading platform 2 Stand 3 Supporting handle 4 Laser oscillator 5 Optical fiber 6 Measuring device 7 Pumping device 8 Supply hose 9 Bed 10 Positioning

Claims (8)

[Claims] 1. A laser head for irradiating a laser,
A dental treatment apparatus characterized in that a measuring device for detecting a moving position of the laser irradiation head to measure a three-dimensional shape is provided to perform both processing and measurement by the laser for irradiation. 2. The dental treatment apparatus according to claim 1, further comprising a guide nozzle for guiding the laser light. 3. The dental treatment device according to claim 1, wherein the measuring device detects reflected light having a wavelength different from that of the laser to be irradiated. 4. The dental treatment device according to claim 1, wherein the measuring device comprises a CRT displaying a detection signal. 5. The dental treatment apparatus according to claim 1, wherein the measuring device comprises a three-dimensional NC tape maker by processing a detection signal. 6. A stand is provided with a multi-joint support stalk whose position can be freely controlled, and a laser head is provided which is supported by the support stalk and is composed of a laser oscillator for irradiating a laser or an optical fiber for guiding the laser oscillator. A dental treatment device comprising a measuring device for detecting a moving position of a laser irradiation head to measure a three-dimensional shape, and performing both processing and measurement by the laser for irradiation. 7. The dental treatment apparatus according to claim 6, further comprising an NC control device for performing position control of the support handle by NC control. 8. In a dental treatment apparatus for irradiating a laser and jetting water for treatment, a nozzle is provided at the tip, water is jetted to the nozzle, and a laser is struck and radiated to a water column. A dental treatment device characterized by the above.