A power device comprising: multiple light sources (202A, 202B, 202C) arranged in a housing (205); a mask (204) arranged around each of the multiple light sources in the housing and including multiple chambers (207A, 207B, 207C) corresponding to the multiple light sources to direct light (214A, 214B, 214C) emitted from the multiple light sources to a common area (140, 216) on an outer surface of the housing; and multiple image sources (214A, 214B, 214C) corresponding to the multiple light sources arranged between the multiple light sources and the outer surface of the housing, light emitted from each of the multiple light sources reaching a corresponding image source before reaching the surface of the housing and projecting a corresponding image (212) on the common area on the surface of the housing.

A power device comprising: multiple light sources (202A, 202B, 202C) arranged in a housing (205); a mask (204) arranged around each of the multiple light sources in the housing and including multiple chambers (207A, 207B, 207C) corresponding to the multiple light sources to direct light (214A, 214B, 214C) emitted from the multiple light sources to a common area (140, 216) on an outer surface of the housing; and multiple image sources (214A, 214B, 214C) corresponding to the multiple light sources arranged between the multiple light sources and the outer surface of the housing, light emitted from each of the multiple light sources reaching a corresponding image source before reaching the surface of the housing and projecting a corresponding image (212) on the common area on the surface of the housing.

Examples of apparatus, methods, and compositions for endodontic treatments are described. In certain implementations, the apparatus can include a treatment fluid supply configured to supply a treatment fluid to a treatment region of the tooth and a pressure wave generator configured to generate pressure waves in the treatment fluid. The pressure wave generator can include a volume housing an electromagnetically responsive material, a diaphragm including a first side and a second side, the first side exposed to the volume, the second side exposed to the treatment fluid, the diaphragm being movable such that movement of the electromagnetically responsive material within the volume causes movement of the diaphragm, and an electromagnetic generator coupled to the volume, the electromagnetic generator configured to generate electromagnetic energy. The electromagnetically responsive material can be responsive to the electromagnetic energy generated by the electromagnetic generator so as to cause the movement of the diaphragm.

A dental prophy angle reduces the ejection of blood, dental polish, and saliva from a patient's mouth during a dental procedure. The dental prophy angle includes a drive head with an airflow generator is positioned within the drive head. The airflow generator produces an airflow pattern that exits from the drive head. A prophy cup is attached to the drive head. The airflow pattern travels over the outer surface of the prophy cup. The air flow pattern reduces the amount of material that builds up on the outer surface of the prophy cup, thereby reducing the ejection of material from the patient's mouth. In certain embodiments, the prophy cup is transparent to enable a dental practitioner to visualize the prophy paste within the prophy cup.

A dental prophy angle reduces the ejection of blood, dental polish, and saliva from a patient's mouth during a dental procedure. The dental prophy angle includes a drive head with an airflow generator is positioned within the drive head. The airflow generator produces an airflow pattern that exits from the drive head. A prophy cup is attached to the drive head. The airflow pattern travels over the outer surface of the prophy cup. The air flow pattern reduces the amount of material that builds up on the outer surface of the prophy cup, thereby reducing the ejection of material from the patient's mouth. In certain embodiments, the prophy cup is transparent to enable a dental practitioner to visualize the prophy paste within the prophy cup.

Apparatus and methods for endodontic treatment of teeth provide effective cleaning of organic material (such as pulp and diseased tissue) from the root canal system. In an embodiment, a compressor system generates high pressure liquid (e.g., water) that flows through an orifice to produce a high-velocity collimated jet of liquid. The high-velocity jet is directed toward a surface of a tooth, for example, an exposed dentinal surface, and impingement of the jet onto the surface generates an acoustic wave that propagates throughout the tooth. The acoustic wave effectively detaches organic material from dentinal surfaces and tubules. The detached organic material is flushed from the root canal system by the liquid jet and/or by additional irrigation.

Apparatus and methods for endodontic treatment of teeth provide effective cleaning of organic material (such as pulp and diseased tissue) from the root canal system. In an embodiment, a compressor system generates high pressure liquid (e.g., water) that flows through an orifice to produce a high-velocity collimated jet of liquid. The high-velocity jet is directed toward a surface of a tooth, for example, an exposed dentinal surface, and impingement of the jet onto the surface generates an acoustic wave that propagates throughout the tooth. The acoustic wave effectively detaches organic material from dentinal surfaces and tubules. The detached organic material is flushed from the root canal system by the liquid jet and/or by additional irrigation.

An electric toothbrush system may include a brush head, an adapter, and a personal computing device. The brush head may have a plurality of bristles. The adapter may include an actuator, a stem extending from the actuator, and a connector electrically connected to the actuator. The personal computing device may contain a power source. The stem may be configured to couple with the brush head, and the actuator may be configured to receive power from the personal computing device through the connector and actuate the brush head via the stem.

Apparatus and methods for endodontic treatment of teeth provide effective cleaning of organic material (such as pulp and diseased tissue) from the root canal system. In an embodiment, a compressor system generates high pressure liquid (e.g., water) that flows through an orifice to produce a high-velocity collimated jet of liquid. The high-velocity jet is directed toward a surface of a tooth, for example, an exposed dentinal surface, and impingement of the jet onto the surface generates an acoustic wave that propagates throughout the tooth. The acoustic wave effectively detaches organic material from dentinal surfaces and tubules. The detached organic material is flushed from the root canal system by the liquid jet and/or by additional irrigation.

Apparatus and methods for endodontic treatment of teeth provide effective cleaning of organic material (such as pulp and diseased tissue) from the root canal system. In an embodiment, a compressor system generates high pressure liquid (e.g., water) that flows through an orifice to produce a high-velocity collimated jet of liquid. The high-velocity jet is directed toward a surface of a tooth, for example, an exposed dentinal surface, and impingement of the jet onto the surface generates an acoustic wave that propagates throughout the tooth. The acoustic wave effectively detaches organic material from dentinal surfaces and tubules. The detached organic material is flushed from the root canal system by the liquid jet and/or by additional irrigation.