a detailed description of the inventive dental device will now be provided with specific reference to figures illustrating preferred embodiments . it will be appreciated that like structures will be provided with like reference designations . fig1 a and 1b show an embodiment of the present invention having extension portion 100 conforming substantially along a first longitudinal axis or plane 180 , and a handle portion 110 conforming substantially along a second longitudinal axis or plane 185 . a bend ( or joint ) portion 107 between the handle portion 110 and extension portion 100 eventuates along longitudinal axis 180 . extension portion 100 comprises light source 105 and extends essentially into joint portion 107 . the extension portion 100 and handle portion 110 may be of a continuous form , or separable at joint portion 107 , as will be detailed hereinafter . the device may further comprise light controls 115 , shown optionally disposed on handle portion 110 , and may also comprise a power source , such as cord 120 . as shown in fig1 a , the intersection of the longitudinal axes ( or planes ) 180 and 185 forms an acute angle α 130 , and a corresponding obtuse angle θ 132 . stated alternatively , the handle longitudinal axis 185 is laterally offset by the extension longitudinal axis 180 , forming the acute angle α 130 ( e . g ., the standard contra angle of a dental hand piece , which is 17 . 5 °), and the corresponding obtuse angle θ 132 . in fig1 , light source 105 faces essentially laterally toward handle axis 185 , or into the plane formed by the acute angle α 130 . the degree of the acute angle α 130 may be predetermined , or adjustable in a variety of conformations , as will be illustrated in one or more of the following figures . regardless , the light source 105 directs light in a contra angle formation with respect to the overall device . the contra position may be beneficial in at least one respect because it may provide a more natural reach to certain curved portions of the patient &# 39 ; s mouth . fig1 b shows simply an opposite side perspective view of the fig1 a . as shown in fig1 b , the light exiting the light source 105 may exit at a variety of essentially lateral directions , though in some embodiments the exit angle ( s ) of the light will be focused to a minimal number of exiting directions , such as essentially perpendicular to the handle axis 180 . or as detailed more fully in fig9 b , the light source 105 may pivot such that , although the light source 105 is focused , the light source may be directed to a variety of lateral directions with respect to the extension portion longitudinal axis 185 . thus , while the light exiting the light source 105 may be said in this specification and following claims to be perpendicular ( or focused , or directed ) to either the handle 110 longitudinal axis 185 or the extension 100 longitudinal axis 180 , one will appreciate that the light may be directed to or from either axis at a less than perpendicular angle . fig2 a shows a rotatable version of fig1 a – b , and a variety of rotation conformations of extension portion 200 relative to handle portion 210 . for example , fig2 a – 2c show extension portion 200 with light source 205 disposed thereon , conforming substantially along longitudinal axis or plane 280 , and extension portion 200 further connected with handle portion 210 via joint portion 207 . handle portion 210 conforms substantially along longitudinal axis 285 , and is shown with optional light controls 215 , as well as shown connected to power source ( or cord ) 220 . in contrast to fig1 a however , extension portion 200 is independently rotatable ( at joint portion 207 ) from gripping portion or handle portion 210 . fig2 a shows also shows the intersection of longitudinal axis 285 and longitudinal axis 280 forming an acute angle α 230 , and an obtuse angle θ 232 . light source 205 is shown in the contra angle position , meaning , in this case , that it is positioned bending away from the handle longitudinal axis 285 , and at the same time directing light in the direction of longitudinal , handle axis 285 , or away from the plane formed by the obtuse angle θ 232 . in addition , because a user can rotate extension portion 200 with respect to handle portion 210 , a user can rotate the light source in or out of the contra angle position . for example , fig2 b shows the device rotated to 180 degrees with respect to fig2 a . in fig2 b , light source 205 would be considered facing away from handle axis 285 , or away from the plane formed by the acute angle α 230 , and facing into the plane formed by the obtuse angle θ 232 , and hence not in the contra angle position . fig2 c shows the light source rotated 90 degrees such that the light faces in a direction essentially perpendicular to the hypothetical planes formed by the intersection of the longitudinal axes 285 and 280 , and hence perpendicular to both of the planes formed by the acute angle 230 and the obtuse angle 232 . of course , the device may be configured to rotate extension portion 200 in 360 individual degree increments , or several degree sets such as 45 degrees , 90 degrees , 180 degrees etc . the invention is not so limited . fig3 shows another embodiment of the present invention with light source 305 disposed on extension portion 300 , which connects to handle portion 310 at joint portion 307 . fig3 also shows the device with light source controls 315 disposed thereon . the overall device may also have an electricity source , such as cord 320 , although any of the preceding and following embodiments may be performed using a battery pack . fig3 shows just one embodiment of how the device may be rotated or may be angled . a manufacturer may wish to supply the device with a turning knob 307 that may increase the angle formed between extension portion 300 and handle portion 310 , or a similar adjuster may serve to swivel extension portion 300 compared to handle portion 310 in steady increments . in short , there are several ways well known in the art by which a manufacturer may offer angle or rotation adjustments . fig4 shows another embodiment of the present invention regarding how extension portion 400 may be electrically connected with handle portion 410 . the device may further comprise light controls 415 , shown optionally disposed on handle portion 410 , and may also comprise a power source , such as cord 420 . fig4 shows extension portion 400 conforming substantially along a first longitudinal axis 480 and handle portion 410 conforming substantially along a second longitudinal axis 485 . the intersection of these longitudinal axes forms an acute angle α 430 , and a corresponding obtuse angle 432 . fig4 shows extension portion 400 bending away from handle axis 485 , with light source 405 directing light toward handle axis 485 , or in a plane formed by the acute angle α 430 , and hence in a contra angle position . the joint between extension portion 400 and gripping portion 410 , shows an electrical connector 407 , which may be a standard electronic mating . fig4 also shows that the extension portion 400 may be rotatable from handle portion 410 by a series of discrete , separate fittings such as female fit 412 and male fit 417 . one will appreciate that male and female rotation fittings provide steady ( or locking ) rotation increments , and prevent rotation slippage . as well , these fittings may be configured to rotate the extension portion at any variety of rotation degrees . fig4 , however , shows two male positions such that a user may rotate extension portion 400 only by 180 degrees . of course , a manufacturer may configure this to allow rotation by 45 or 90 degree increments , or other more continuous variants . fig5 shows another embodiment of how the extension portion of the inventive dental device may be connected with the gripping portion , and also be both angled , and rotatable . fig5 shows light source 505 disposed on an extension portion 500 , which is connected with gripping portion 510 . on gripping portion 510 are light source controls 515 and exemplary power source 520 . the extension portion 500 and gripping portion 510 may connect electrically through a plurality of male 550 and female 540 electrical elements . a user may also rotate the extension portion 500 independently with gripping portion 510 via fittings 512 and 517 . again , as in the previous figures , this may be configured to rotate at 45 , 90 , and 180 degrees , or more continuous variants in between , etc . male 550 and female 540 electrical connectors may comprise alternating positive and negative connectors , or uniformly charged male 550 and uniformly charged female 540 electrical connectors , etc . fig6 shows one embodiment of the invention where the device is rotatable but not actually separable , though it is shown separated for purposes of convenience . fig6 illustrates a light source 605 disposed on an extension portion 600 , which is communicably connected with gripping portion 610 . fig6 also shows light source controls 615 disposed on the device , and the device connected electrically with power source 620 . at the connection point between extension portion 600 and handle portion 610 , shown is an electrical connection 607 surrounded by a spring . in this embodiment , the electrical connection preferably locks the extension portion 600 and handle portion 610 from full lateral separation . nevertheless , the spring may allow the extension portion 600 to rise away from the gripping portion 610 sufficient that a user may rotate the extension and handle portions with respect to each other . the degree a user may rotate the respective portions may be governed by mating points between extension portion 600 and gripping portion 610 , such as mating portions 612 and 617 . as in the previous embodiments , one will appreciate that such mating portions provide a steady , non - slipping rotation capability . accordingly , a manufacturer may configure the device to allow extension portion 600 rotation from the gripping portion 610 by 45 degrees , 90 degrees , 100 degrees , 180 degrees , etc . the ability to rotate the portions , of course , allows the user of the device to conform the device to a variety of different positions . this , in conjunction with the ability to form a contra angle , also allows the operator a greater ease of use in reaching , for example , light curable dental compounds in certain curved portions of a patient &# 39 ; s mouth . rotation capability allows greater flexibility for use by left and right handed operators to access the same angles alike . fig7 shows another embodiment of how this angled device may be configured to both rotate and / or separate the respective device portions . the inventive device as shown in fig7 has light source 705 disposed on an extension portion 700 , the extension portion connected to a gripping or handle portion 710 . the device also has an electrical connection 720 exposed on gripping portion 710 , and a light source control 715 disposed thereon . electrical female fittings 740 and male fittings 750 comprise a plurality of mated electrical connections , such as shown also in fig5 . these electrical fittings may comprise alternating positive and negative connectors , depending on a manufacturer &# 39 ; s preference or may be uniformly charged . these provide the electrical connection between handle portion 710 and extension portion 700 so that light source 705 may receive necessary power . fig7 shows a rotation capability between extension portion 700 and gripping portion 710 , along mating portions 712 and 717 . this is yet another way of how the extension may be rotated . here gaps 712 may be configured for 45 , 90 degree and 180 rotations , etc ., and flexible component 717 is designed to snap into each gap 712 . in short , there are many different ways in which to rotate or separate the inventive dental device where at least one of the rotated positions should provide a contra angle for the light source . fig8 a – 8b , illustrate yet additional variations on the dental device that may be easily applied to other embodiments described herein , or to other embodiments within the spirit of this disclosure . for example , the dental curing device may be substantially linear , wherein extension portion 800 and handle portion 810 both conform substantially along axis 885 . the device may further comprise light controls 815 , shown optionally disposed on handle portion 810 . alternatively , it could be said that extension portion 800 and handle portion 810 both conform along substantially parallel axes . in addition , the inventive dental curing device may have a standard battery compartment 850 so that the dental curing device is not limited in motion by an attached power source , e . g ., 120 ( as shown in fig1 a ). of course , the dental curing device may also have both a battery source 850 and a power source 120 such that the dental curing device uses rechargeable batteries that recharge when attached to the power source 120 . fig8 a – 8b also illustrate some of the ways the device may be configured to rotate the light source about the longitudinal axis 885 using an additional type of restraint means . in particular , fig8 b is an exploded view of one possible restraint / rotation means for rotating light source 805 about the extension portion 800 . in fig8 a , light source 805 is shown to have an attachment or swivel point 807 that is much higher up along the dental curing device than the swivel point , e . g ., 207 , shown in other embodiments . in some such embodiments , the extension portion 800 and handle portion 810 may not swivel or detach , though the light source 805 may . furthermore , light source 805 may itself swivel at a longitudinal swivel point 806 within the light source 805 so that the light source may fan up or down ( shown in fig9 b ), to increase the variety of accessed angles . the ability to swivel the light source about the extension portion 800 may be accomplished by a variety of mechanical methods , though one is shown in fig8 b for purposes of convenience , and a second is shown in fig9 b . with respect to the swivel mechanism of fig8 b , the swivel point 807 may comprise an upper and lower plate with a plurality of detents 830 that fit conformably into a plurality of corresponding recesses 840 , and hence provide restraint means when in position . thus , the user would simply rotate the light source 805 out of the restraint means by applying transverse pressure , which in turn causes the detents 830 to move out of the original recess 840 . then detents 830 would then fall into the next recess 840 , creating a new restraint , when the respective detent 830 and next recess 840 are aligned . such a motion may create a “ click ” sound when a user rotates the light source 805 . in short , there are a variety of methods for accomplishing restraint / rotation means with a click adjustment . fig9 a – 9b illustrate additional embodiments of the present invention for adjusting the light source laterally and longitudinally , and for rotating the light source with respect to the device . fig9 a shows a substantially linear light - curing device having a handle 910 , a battery compartment 950 , and light controls 915 . an extension portion 900 is also shown disposed along a handle axis 985 , such that the handle 910 and extension 900 portions comprise a substantially linear light curing device . as in fig8 a – 8b , light source 905 is shown having a swivel point 907 much higher up along the extension portion 900 . fig9 a shows an additional swivel point 906 whereby the light source 905 may swivel longitudinally up and down , and hence deliver light through a greater variety of angles . fig9 b illustrates an additional method of rotating the light source transversely with respect to the extension portion 900 . this can be accomplished using alternative restraint means , for example , through use of one or more elastomeric rings 930 interfacing between the light source 905 head , and the extension portion 900 . a ring 930 may be of sufficient height to extend longitudinally into a ring recess 940 , to create a circular friction fit . the recess 930 itself may be created having elastomeric inner rings 942 that rub against ring 930 . the light source 905 would then rotate when a user applies sufficient transverse pressure to overcome the friction forces inherent in the elastomeric ring 930 and recess 940 . these friction forces should provide sufficient restraint means such that the elastomeric ring 930 would stabilize the light source 905 from rotating against recess 940 while a user applies the curing device within a patient &# 39 ; s mouth . this friction based rotation mechanism could provide a more granular rotation mechanism than might be possible with other rotation mechanisms illustrated in the prior figures . in both of the illustrated swivel cases of fig8 a – 8b , and 9 a – 9 b , the inventive dental device may be configured to swivel only with no detachment between the light source ( 805 , 905 ) extension portions ( 800 , 900 ) and handle portion ( 810 , 910 ) or to swivel with some moderate detachment , or to detach in accordance with other embodiments described herein . in summary , the dental devices of the invention are configured to allow at least one contra angle formation for the light source , so that the light source may access the maximum positions within a patient &# 39 ; s mouth , while minimizing prior ergonomic disadvantages . the devices are configurable with any number of electrical connections , and , in some cases , any number of rotation mechanisms . such rotation mechanisms may include the above , and may also include other steady rotation mechanisms known in the art such as those employing friction . in addition , the devices are configured to have the same general shape , size and weight of conventional dental hand pieces , thereby enabling the dental devices to be securely held within the holders or holding slots of conventional dental hand piece holding trays . the dental devices of the invention may also include a remotely located power supply , which generally eliminates the need for such items as battery packs and fiber optic light guides , thereby reducing the overall weight and bulk of the dental devices . it will 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 .
a dental device configured for curing light - curable compounds includes an extension portion conforming along a first axis , and a handle portion conforming along an intersecting axis , the axes forming an obtuse angle . an led light source is disposed on the extension portion , and faces away from the obtuse angle , though rotatable embodiments allow for other configurations . the led light source may include transilluminating lenses for filtering out undesired radiant energy . the dental device may include finger controls for controlling the emission of light from the led light source of the dental device . a remote power supply connected with the dental device provides power to the dental device without increasing the size or weight of the dental device .