The invention relates to a method and an arrangement for the cleaning of a circumferentially closed canal by means of a light guide conducting a laser beam. The entry of the laser beam into the light guide is interrupted when the free end of the light guide is outside of the canal and/or the movement of the light guide within the canal is monitored and that if there is no movement or the movement is below a threshold value then a signal is triggered and/or the laser radiation is turned off or its output is reduced.

An optical system measures one or more physiological parameters with a wearable device that includes a light emitting diode (LED) source including a driver and a plurality of semiconductor sources that generate an output optical light. One or more lenses deliver a lens output light to tissue of a user. A detection system receives at least a portion of the lens output light reflected from the tissue and generates an output signal having a signal-to-noise ratio. The detection system comprises a plurality of spatially separated detectors and an analog to digital converter. The detection system increases the signal-to-noised ratio by comparing a first signal with the LEDs off to a second signal with the LEDs on. An imaging system including a Bragg reflector is pulsed and has a near infrared wavelength. A beam splitter splits the light into a sample arm and a reference arm to measure time-of-flight.

By using techniques to diverge an emitted beam, the same base device may be utilized as either a cutting laser or a curing light. The use of multiple frequency laser modules (312) and a selection of emitter heads (304) allow for systems (300) which may be used for a wide variety of medical and dental procedures. Each system (300) has a plurality of emitter heads (304) to select from either a curing light, a cutting laser, or any other therapeutic energy emission all while utilizing the same laser module (312). Various structures of emitter heads are disclosed, as well as laser modules and connection strategies.

By using techniques to diverge an emitted beam, the same base device may be utilized as either a cutting laser or a curing light. The use of multiple frequency laser modules (312) and a selection of emitter heads (304) allow for systems (300) which may be used for a wide variety of medical and dental procedures. Each system (300) has a plurality of emitter heads (304) to select from either a curing light, a cutting laser, or any other therapeutic energy emission all while utilizing the same laser module (312). Various structures of emitter heads are disclosed, as well as laser modules and connection strategies.

By using techniques to diverge an emitted beam, the same base device may be utilized as either a cutting laser or a curing light. The use of multiple frequency laser modules (312) and a selection of emitter heads (304) allow for systems (300) which may be used for a wide variety of medical and dental procedures. Each system (300) has a plurality of emitter heads (304) to select from either a curing light, a cutting laser, or any other therapeutic energy emission all while utilizing the same laser module (312). Various structures of emitter heads are disclosed, as well as laser modules and connection strategies.

By using techniques to diverge an emitted beam, the same base device may be utilized as either a cutting laser or a curing light. The use of multiple frequency laser modules (312) and a selection of emitter heads (304) allow for systems (300) which may be used for a wide variety of medical and dental procedures. Each system (300) has a plurality of emitter heads (304) to select from either a curing light, a cutting laser, or any other therapeutic energy emission all while utilizing the same laser module (312). Various structures of emitter heads are disclosed, as well as laser modules and connection strategies.

Methods and systems for modifying tissue use a pressurized fluid stream carrying coherent light energy. The methods and systems may be used for resecting and debulking soft and hard biological tissues. The coherent light is focused within a stream of fluid to deliver energy to the tissue to be treated.

A dental procedure performed on target tissue without anesthetic or anesthesia including preconditioning the target tissue using a laser device constructed to produce light in a wavelength range of 2750 nm to 11500 nm, to provide an energy fluence in a range of 50 J/cm.sup.2 to 100 J/cm.sup.2, and to operate in a free running pulsed mode providing 60 μm bursts at a frequency of at least 50 Hz. Preconditioning includes selecting a combination of average optical output power and preconditioning time to administer low level laser therapy. The laser device is adjusted to deliver light through the light guide of the laser device at the selected average optical output power. Light delivered through the light guide of the adjusted laser device is directed toward the target tissue for the selected preconditioning time providing analgesia to the target tissue. Oral tissue is removed from the preconditioned target tissue during analgesia.

A dental procedure performed on target tissue without anesthetic or anesthesia including preconditioning the target tissue using a laser device constructed to produce light in a wavelength range of 2750 nm to 11500 nm, to provide an energy fluence in a range of 50 J/cm.sup.2 to 100 J/cm.sup.2, and to operate in a free running pulsed mode providing 60 μm bursts at a frequency of at least 50 Hz. Preconditioning includes selecting a combination of average optical output power and preconditioning time to administer low level laser therapy. The laser device is adjusted to deliver light through the light guide of the laser device at the selected average optical output power. Light delivered through the light guide of the adjusted laser device is directed toward the target tissue for the selected preconditioning time providing analgesia to the target tissue. Oral tissue is removed from the preconditioned target tissue during analgesia.

A dental implant has an implant body made of diamond material, the implant body being provided with a bore hole that has at least one lateral dimension and a depth dimension, the lateral dimension and the depth dimension being mm sized. The bore hole is substantially formed by laser light being directed at the implant body to form said bore hole by softening said diamond material at an intended location of said bore hole. The bore hole is further defined by utilizing at least one metallic drilling tool to remove more of the diamond material after initial formation of the bore hole by said laser light. Preferably, the drilling tool has a cone shaped drilling head or a rectangular drilling head.