while the invention is susceptible of various modifications and alternative constructions , certain illustrated embodiments thereof have been shown in the drawings and will be described below in detail . it should be understood , however , that there is no intention to limit the invention to the specific form disclosed , but , on the contrary , the invention is to cover all modifications , alternative constructions , and equivalents falling within the spirit and scope of the invention as defined in the claims . some of the preferred embodiments of the invention are shown in fig1 through 7 . referring to fig1 there is shown a sterilization cassette 10 . sterilization cassette 10 includes a generally rectangular case 12 which is preferably made of metal such as stainless steel . other materials which are suitable to withstand the ultrasonic cleaning and sterilization process would also be acceptable to use in case 12 , such as other metals , plastics , ceramics , or other materials . case 12 includes a left side 14 , a right side 16 , a back side 18 , a front side 20 , a top side 22 , and a bottom side 24 . in the preferred embodiment of the invention shown in fig1 each of these sides have perforations 26 , which allow the passage of hot air , steam , ultrasonic cleaning fluid , and sterilization chemical vapors into and out of the sterilization cassette 10 . the case 12 includes a plier mounting bar 28 which extends from right side 16 to left side 14 . plier mounting bar 28 would typically be a metal bar covered by teflon ® cylinders 30 . the teflon ® cylinders 30 would preferably be color coded to allow fast identification of dental pliers , and accurate replacement in the rack after use . the teflon ® cylinders 30 are separated by metal disks 32 , which form individual positions for dental pliers 34 . dental pliers 34 can include a number of plier - like instruments , and specifically include hard wire cutters , bird &# 39 ; s beak pliers , three - prong pliers , ligature cutters , adjustment pliers , weingart pliers , hemostats , and other plier - like dental hand tools . an instrument tray 36 is also provided , and other small dental instruments 38 are placed in instrument tray 36 . dental instruments 38 can include a number of instruments such as mirrors , picks , scrapers , files , scalpels , and other small hand tools . the teflon ® cylinders 30 and the metal disks 32 , form plier mounting positions . the sterilization cassette 10 also includes a plier locking bar 40 which is attached to front side 20 of case 12 . plier locking bar 40 is a bar which extends from a first bracket 42 to a second bracket 44 , each of which is attached to front side 20 . plier locking bar 40 would typically be a metal bar which is covered by a teflon ® covering . in a preferred embodiment of the invention , case 12 includes a first hinge 46 and a second hinge 48 . in this embodiment of the invention , first hinge 46 and second hinge 48 are piano hinges and divide front side 20 into three portions . these portions are best seen in fig5 . first hinge 46 divides front cover 20 into a top front side 50 and a mid front side 52 . second hinge 48 divides front cover 20 into another side , a bottom front side 54 . referring again to fig1 sterilization cassette 10 further includes plier handle divider 56 . sterilization cassette 10 also includes a tool slot 58 , into which larger tools such as hemostats or forceps may be placed for sterilization . by utilizing the double hinge configuration of sterilization cassette 10 , sterilization cassette 10 may be configured in a number of ways to suit the needs of the user . fig1 shows sterilization cassette 10 arranged in a vertical configuration , so that dental pliers 34 or dental instruments 38 may be removed or replaced in their positions in a horizontal configuration . fig2 shows sterilization cassette 10 in a vertical configuration , with front side 20 folded into a configuration which provides a tray below the tools of the open cassette . fig3 shows the sterilization cassette 10 in horizontal configuration , and in this configuration , tools would be presented to the practitioner in a horizontal rather than a vertical format . in the horizontal configuration , the front side 20 can also be folded to various configurations . one configuration is shown in fig3 and another configuration of front side 20 is shown in fig4 . fig5 shows the sterilization cassette 10 in an almost closed configuration , in which top front side 50 is open only slightly . fig6 shows a transfer rack 60 . this particular transfer rack is configured with four trays , and the number of trays would vary according to the size of the sterilization oven . a typical sterilization oven is shown in fig7 and includes a transfer rack 60 with four sterilization cassettes 10 . in fig7 one of the sterilization cassettes 10 is shown wrapped in a membrane 64 . one option for sterilizing instruments in the sterilization cassettes 10 is to cover the sterilization cassettes 10 with a membrane 64 which allows the passage of gases , which is stable in the heat in the sterilization chamber , and which is impermeable to microbes . a membrane 64 could be folded around a sterilization cassette 10 , much like the wrapping of a gift . the membrane 64 could also be in the form of a bag with a sealable closure . the oven shown in fig4 is similar to a popular type of sterilization oven such as the dentronix 5000 . there are a number of configurations of sterilization cassettes , some of them with polygonal chambers , and transfer rack 60 can be adapted for different sizes and configurations of sterilization ovens 62 . fig7 shows sterilization oven 62 with the oven door 66 open . while there is shown and described the present preferred embodiment of the invention , it is to be distinctly understood that this invention is not limited thereto but may be variously embodied to practice within the scope of the following claims . from the foregoing description , it will be apparent that various changes may be made without departing from the spirit and scope of the invention as defined by the following claims .
a sterilization cassette and a sterilization method for sterilizing , storing , and dispensing dental instruments . the sterilization cassette includes a mounting bar and a locking bar for dental pliers of various types , a removable instrument tray , and a case with a front side which opens and hinges in two places , allowing the cassette to be arranged in horizontal and vertical configurations .