Light curing device with detachable power supply

[0001] 1. The Field of the Invention

[0002] The present invention is in the field of light curing devices and, more particularly, to dental light curing devices.

[0003] 2. The Relevant Technology

[0004] In the field of dentistry, dental cavities are often filled and/or sealed with photosensitive compounds that are cured when they are exposed to radiant energy, such as visible light. These compounds, commonly referred to as light curable compounds, are placed within dental preparations or onto dental surfaces where they are subsequently irradiated by a light curing dental device.

[0005] Existing light curing devices are configured to emit adequate light from one or more light sources into a patient's mouth and in a manner that is suitable to cure the light curable compounds. Typically, at least a portion of the light curing device is inserted within the patient's mouth proximate a dental preparation to help ensure the light is dispersed at the desired location. Inserting the light curing device with the patient's mouth, however, necessitates that the light curing device is sterilized between uses.

[0006] Sterilizing the light curing device between uses is a tedious task that is complicated by the size and shape of exiting light curing devices. For instance, the battery pack or power cord of existing light curable devices makes it somewhat awkward to move the light curing devices to a sterilizing station, thereby complicating the sterilizing process.

[0007] One existing method for maintaining a sterile light curing device, which is disclosed in U.S. Pat. No. 6,102,696, issued to Osterwalder et al., includes the use of a transparent sleeve that is placed over the portion of the light curing device that is inserted within the patient's mouth. Between uses, the transparent sleeve can then be replaced with a new sterile sleeve. The plastic sleeve, however, can be difficult to position and replace and is not necessarily easier than sanitizing the light curing device. The plastic sleeve may also create undesired optical dispersion of the light.

[0008] Another problem experienced with existing light curing devices is that the attached power cords make them somewhat inconvenient to freely transport between different locations. For instance, it is somewhat awkward and hazardous to carry a light curing device from room to room when the device has a dangling cord. It can also be time consuming and undesirable to have to ravel the cord up before moving the device.

[0009] Although battery powered light curing devices are more mobile than light curing it is also somewhat limited. In devices having cords, it can be difficult to find an adequate location to temporarily store the battery pack while the light curing device is separated from the battery pack. This can be a problem because the battery pack may become misplaced, lost, or even worse, the battery pack may be unintentionally dropped and damaged.

[0010] Yet another problem with existing light curing devices is that they are typically sold as single integrated units. This can be a problem when a portion of the light curing device becomes damaged or otherwise becomes nonfunctional, such as when the light-generating source burns out in which case, the entire light curing device must be replaced. This is undesirable from a practitioner's perspective because of the cost required to buy a new device. The integration of existing light curing devices is also undesirable in certain circumstances because this essentially limits the functionality of the light curing devices to the inherent characteristics of the integrated components. Integration prevents the components from being interchanged to utilize the different attributes and functionality of the alternate components.

[0011] Accordingly, in view of the foregoing, there is currently a need in the art for improved light curing devices.

[0012] Briefly summarized, the present invention is directed to improved light curing devices that are capable of being easily sterilized, transported and that are capable of utilizing detachable components.

[0013] According to one embodiment, the light curing devices of the invention includes detachable power supply units and light applicators that are detachably connectable. The detachable power supply unit may include a detachable battery pack or a detachable power cord that is configured to receive power from a remote source, such as a wall outlet, a remote battery, or a remote generator.

[0014] The detachable power supply unit is preferably configured in size and shape to be securely held within the holding slot of a standard dental hand piece holding tray. It will be appreciated that this is useful for at least minimizing any chance a battery pack will get misplaced. This also minimizes any chance that a power cord will become tangled, tripped over, or otherwise become a nuisance when the light-applicator is moved during periods of non-use. In particular, the battery pack and/or power cord can remain securely held in a known and desirable location while the light applicator is moved to a different location or separated from the power supply unit to be cleaned or replaced.

[0015] According to another aspect of the invention, the light applicator is configured to be sterilized in an autoclave. Accordingly, between uses, the light applicator can be separated from the detachable power supply unit and sterilized in an autoclave. While the light applicator is sterilized, the detachable power supply unit can be left securely held within the holding slot of a standard hand piece holding tray.

[0016] These and other benefits, advantages and features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.

[0017] In order that the manner in which the above recited and other benefits, advantages and features of the invention are obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

[0018] FIG. 1 illustrates a perspective view of one embodiment of the light curing device of the invention that includes a light applicator that is connected to a power cord securely held in the holding slot of a dental hand piece holding tray;

[0019] FIG. 2 illustrates a partial cross-sectional view of the light curing device of the invention that shows the detachable coupling of the light applicator and the power cord;

[0020] FIG. 3 illustrates a partial cross-sectional view of the light curing device of FIG. 1 that shows the light applicator detached from the power cord;

[0021] FIG. 4 illustrates a partial cross-sectional view of one embodiment of the light curing device in which the light applicator is connected to a detachable battery pack that is configured in size and shape to be held in the holding slot of a standard dental hand piece holding tray;

[0022] FIG. 5 illustrates a perspective view of the light curing device of FIG. 1 that shows a control panel that may be used for controlling the light curing device; and

[0023] FIG. 6 illustrates a partial cross-sectional view of one embodiment of the light curing device in which the light applicator is disposed above the control panel of the light-curing device.

[0024] A detailed description of the invention will now be provided with specific reference to figures illustrating preferred embodiments of the invention. It will be appreciated that like structures will be provided with like reference designations. To provide context for interpreting the scope of the invention, certain terms used throughout the application will now be defined.

[0025] The term dental hand piece, as used herein, generally refers to a handheld dental device that engages rotary instruments for cutting, cleaning, polishing or otherwise treating teeth. The term dental hand piece is a term of art well known in the dental industry. Nonlimiting examples of dental hand pieces include high speed turbines, low speed turbines, ultrasonic devices, and 3-way syringes. Dental hand pieces are typically driven by pneumatic, electric, and ultrasonic mechanisms.

[0026] The term dental hand piece holding tray generally refers to a tray configured with holding slots specifically configured in shape and size for holding conventional dental hand pieces. Dental hand piece holding trays, which are well-known to those skilled in the art, are placed proximate or mounted directly to dental chairs for facilitating access to dental hand pieces held by the holding trays.

[0027] The terms holding slot and holder, which are used interchangeably herein, generally refer to devices configured in size and shape to securely hold a dental hand piece. A holding slot is a typical feature of a dental hand piece holding tray.

[0028] The term light applicator, as used herein, refers to a portion of the light curing device that is configured in size and shape to be inserted at least partially within the mouth of a patient and which is also configured to transmit, emit, direct, or otherwise apply light to a desired application site within the patient's mouth. By way of example, and not limitation, the light applicator may include a light source and corresponding light source mounting structures that are configured in size and shape to be inserted into a patient's mouth. The term light source includes any light generating device, including, but not limited to, a halogen bulb, a light-emitting diode (LEDs), an LED array, and combinations thereof. The light applicator may also include integral and detachable shields, lenses, and other components configured for insertion within the patient's mouth.

[0029] The terms light-sensitive compound, light curable compound, and compound are used interchangeably herein and refer to compounds that are configured to solidify or otherwise cure upon receiving appropriate radiant energy in the form of light from a light source of a light curing device.

[0030] In general, the light curing devices of the present invention, as described herein, are configured with a detachable power supply unit that is detachably connectable with a light applicator. The detachable power supply units of the invention may include battery packs and power cords that are configured in size and shape to be securely held within the holding slot of a standard dental hand piece holding tray.

[0031] FIG. 1 illustrates one presently preferred embodiment of the light curing device 10 of the invention. As shown, the light curing device 10 includes a light applicator 12 and a detachable power supply unit 14 that are connected together. The electrical and mechanical m coupling between the light applicator and the detachable power supply unit 14 will be discussed below in more detail in reference to FIGS. 2 and 3.

[0032] The light applicator 12 is configured to generate and emit light suitable for curing light curable compounds. This may be accomplished, for example, with an LED 16 or any other suitable light-generating source disposed in the light curing device 10. During normal use, the generated light is emitted from a top portion of the light applicator 12 and into the mouth of a patient. As shown, the light applicator 12 is configured in shape and size to be inserted at least partially into the mouth of a patient.

[0033] During normal use, the light applicator 12 is preferably sanitized between uses to avoid communicating diseases or other contaminating elements between patients. This may be accomplished for example by detaching the light applicator 12 from the detachable power supply unit 14 and autoclaving the light applicator 12. Accordingly, the light applicator is preferably composed of materials that can be autoclaved. The temperature of an autoclave typically reaches about 130 C. Accordingly, it is preferable for the light applicator 12 to be composed of materials that can at least withstand a temperature of 130 C. Examples of suitable materials that can use used to manufacture the shell or body of the light applicator 12 and that are autoclavable include, but are not limited to, polysulphone (PSU) and polyphenylsulphone (PPSU).

[0034] As mentioned above, the light applicator 12 is detachably connected with a detachable power supply unit 14, which may comprise a power cord 18, as shown, or a battery pack as shown and described below in more detail in reference to FIG. 4. According to one embodiment, the detachable power supply unit 14 is configured in size and shape to be held within the holding slot 20 of a standard dental hand piece holding tray, as m shown. This is useful, for example, to enable the detachable power supply unit 14 to be securely held in a desired location while the light applicator 12 is detached for replacement, for cleaning, to be moved to a different station, or for any other reason.

[0035] FIG. 2 illustrates a partial cross-sectional side view of the light curing device 10. As shown, the light applicator 12 is mechanically coupled with the detachable power supply unit 14. In the present embodiment, latches 30 mechanically secure the light applicator 12 to the detachable power supply unit 14. To remove the light applicator 12, the latches 30 can be pulled away from the light applicator 12 with a small tool or with the fingers of a practitioner.

[0036] FIG. 3 illustrates another cross-sectional side view of the light curing device 10. In this embodiment, the light applicator 12 has been removed from the detachable power supply unit 14. This embodiment also illustrates how the light applicator 12 and the detachable power supply unit 14 are configured with suitable connectors to provide an electrical coupling. In particular, the detachable power supply 10 includes pins 32 that are configured to couple with the receptacles 34 formed in the light applicator 12. During use, when the light applicator 12 is coupled with the detachable power supply unit 14, electrical current is able to flow between the pins 32 and the receptacles 34 to provide power to the light curing device 10.

[0037] It will be appreciated that the type of electrical coupling between the light applicator 12 and the detachable power supply unit 14 may be modified or altered to accommodate different needs and preferences and may include any number of electrical coupling components. By way of example and not limitation, the light curing device 10 may alternatively be configured with electrical pins that are disposed on the light applicator 12 m and corresponding receptacles that are disposed within the detachable power supply unit 14.

[0038] FIG. 4 illustrates another embodiment of the light curing device 110. In this embodiment, the light applicator 112 is configured to detachably couple with a detachable power supply unit 114 comprising a battery pack 118. Noticeably, the battery pack 118 is configured in size and shape to be held in the holding slot of a standard hand piece holding tray. As mentioned above, this is useful for enabling the detachable power supply unit 114 to be held within a designated holding slot while the light applicator 112 is temporarily detached for cleaning or for any other reason.

[0039] FIG. 5 illustrates a perspective view of the light curing device 10 from an angle that shows a control panel 50 disposed on the body of the light-applicator 12. The control panel 50 preferably includes control buttons that enable a user to operate the light curing device 10 with finger control. The control panel 50 may be configured to provide any desired functionality. By way of example and not limitation, the control panel 50 may enable the user to increase and decrease the duration of time in which the light curing device 10 is activated. The control panel 50 may also be used to activate and deactivate the light curing device 10.

[0040] In one embodiment, the control panel 50 is sealed to the light-applicator 12 in such a way as to protect the light-applicator 12 from water that could otherwise leak into the light-applicator 12 during cleaning. In another embodiment, the seal of the control panel 50 is sufficient to prevent steam from penetrating the electronic circuitry disposed within the light-applicator 12, such as, for example, during autoclaving.

[0041] FIG. 6 illustrates yet another embodiment of the light curing device 210 of the invention. In this embodiment, the light applicator 212 is configured to detach from the detachable power supply unit 216 above the control panel 250. This embodiment is useful for minimizing any problems that may occur due to a bad seal during autoclaving. This embodiment is also useful for minimizing the expense that may be incurred when replacing the light-applicator 212, inasmuch as the light applicator 212 includes fewer components than in the other light applicators disclosed above. The light applicator 212 is preferably, but not necessarily, configured with sufficient length to enable the light applicator to be inserted within the patient's mouth for curing light curable compounds without requiring any portion of the detachable power supply unit 216 to be inserted within the patient's mouth. This is useful for enabling the light curing device 210 to be adequately sterilized by only autoclaving the light applicator 212, without also requiring autoclaving of the detachable power supply unit 216.

[0042] In summary, the light curing devices of the invention are configured with a light applicator and a detachable power supply unit that are detachably interconnectable. The light applicator is configured to emit light that is suitable to cure photo-sensitive compounds into the mouth of a patient and to be autoclaved. The detachable power supply unit includes a power cord or a battery pack that is configured in size and shape to be held within the holding slot of a dental hand piece holding tray so that it can remain within the holding slot while the light applicator is transported, cleaned or replaced.

[0043] It will also be appreciated that the present claimed invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative, not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.