GB1470427A - Intramucosal denture system - Google Patents

Abstract

1470427 Drilling tools ORATRONICS Inc 30 Aug 1974 [29 Oct 1973] 38065/74 Heading B3C [Also in Division A5] A denture adhering system includes an intramucosal insert 10 for securing an artificial denture 47 to mucosal tissue 36 adjacent a patient's jawbone, insert 10 comprising: a head 12 for seating in tissue 36, a base 14 having a bottom portion 26 and a top portion 24, and a neck 16 connecting head 12 and base 14; wherein top portion 24 is narrower than bottom portion 26 and head 12 has a groove 22 around neck 15. Base 14 is wider than, and neck 16 is narrower than, mushroom-shaped head 12 and all have circular peripheries. The insert is made in one piece of a metal inert to an oral environment, e.g. titanium alloy. Portions 24, 26 are planar and groove 30 between them receives cement 44 for securing base 14 to acrylic denture 40. Groove 22 opens downwardly and receives intramucosal tissue. Base 14 has an upwardly opening groove 32 for receiving tissue aligned with groove 22. A self-limiting, self-levelling denture burr 60 prepares a recess 38 in denture 40 to receive base 14 . End 64 is rotated by a drill, flange 68 abuts the surface of the denture around recess 38 when the latter, cut by end 66 is of the required depth. Flange 68 may be further away from end 66 if the upper surface of denture 40 is concavely curved. A removable non-stick resilient sleeve 50 shields part of the insert, e.g. groove 32 against stray cement during cementing of base 14 in recess 38. A self-centering trimming burr 80, provides a flush surface after cementing by removing cement from base 14. Cavity 88 centres itself on head 12 and side vents 90 allow the removed cement to escape. A self-limiting, self-levelling tissue burr 100 prepares a receptor site 34 in tissue 36 to receive head 12 and neck 16. Burrs 60, 80, 100 are stainless steel or carbide and have a number of grooves 16 to distinguish one burr from another. At its top head 12 has a teat 20 with markings pressure-transferable to tissue 36. The maximum width of portion 24 is closer in distance to the maximum width of head 12 than to the maximum width of portion 26. A denture has a plurality of recesses 38 for inserts 10 which also engage a plurality of receptor sites 34. The insert is typically 0À6 cm. high and 0À6 cm. maximum diameter.