PROSTHODONTIC DEVICE

• US 20140343707A1
• Filed: 11/22/2012
• Published: 11/20/2014
• Est. Priority Date: 11/25/2011
• Status: Active Grant

• Current Assignee: Invibio Limited (Victrex PLC)
• Original Assignee: Invibio Limited (Victrex PLC)
• Inventors: Sereno, Nuno, Jarman-Smith, Marcus
• Granted Patent: US 9,629,697 B2
• Time in Patent Office: Days
• US Class Current: 700/97
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 13/0022 Blanks or green, unfinished dental restoration parts
• CPC Class Codes: A61C 13/01 Palates or other bases or supports for the artificial teeth; Making same
• CPC Class Codes: A61K 6/891 Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 71/10 from phenols
• CPC Class Codes: G05B 19/182 characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control G05B19/21 - G05B19/40 take precedence
• CPC Class Codes: G05B 2219/2647 Dentist

Abstract

A framework for a removable, partial or complete prosthodontic device is made by machining, using a CAD/CAM technique, a disc 2, made from polyetheretherketone, to define the framework 4. Prosthetic teeth and gums can be secured to the framework to define the prosthodontic device.

Claims

1-24. -24. (canceled)

25. A method of making a prosthodontic device which includes the steps of:

(i) selecting a blank from which a framework for the device can be machined, wherein said blank comprises a polymeric material which comprises a repeat unit of formula (I)

26. The method according to claim 25, wherein said framework is made with regions of different roughness.

27. The method according to claim 25,wherein the roughness of first areas of the framework which directly contact parts of a patient'"'"'s mouth in use is lower compared to second areas of the framework to which prosthetic teeth and/or gums are secured.

28. The method according to claim 25, wherein said blank selected in step (i) has a thickness of at least 10 mm and a thickness of less than 60 mm;

a main face which has an area in the range 4000 mm² to 8000 mm²;

a maximum diameter of at least 75 mm; and

a main face which is symmetrical about two orthogonal planes.

29. The method according to claim 25, wherein said polymeric material comprises a repeat unit wherein t1=1, v1=0 and w1=0.

30. The method according to claim 29, wherein said blank is made from a composition which comprises at least 90 wt % of said polymeric material.

31. The method according to claim 25, wherein in step (ii), digital technology is used to collate data on the region into which the prosthodontic device is to fit.

32. The method according to claim 25, wherein machining of said blank is undertaken using at least 5-axis machining

33. The method according to claim 29, wherein after step (iii), a framework is produced which includes no metal and consists essentially of material derived from said blank.

34. The method according to claim 29, which is used to produce a framework for a precision attachment denture or a telescopic denture.

35. The method according to claim 29, wherein said framework includes at least two female elements which are arranged to engage male elements, said female elements comprising sockets which are arranged to receive the aforementioned male elements and wherein walls which define the sockets include regions of thickness less than 1 mm.

36. The method according to claim 29, wherein said framework includes an area of at least 0.5 cm² which has a thickness of less than 2 mm.

37. The method according to claim 29, wherein the framework includes holes which extend through the framework and have an area of less than 10 mm² .

38. The method according to claim 29 which includes the step of securing prosthetic teeth to the framework.

39. The method according to claim 29, wherein said prosthodontic device includes less than 2 wt % of metal.

40. The method according to claim 29, which is a removable prosthodontic device.

42. The method of making a prosthodontic device as claimed in claim 25, wherein:

said polymeric material comprises a repeat unit wherein t1=1, v1=0 and w1=0;

said blank is made from a composition which comprises at least 90 wt % of said polymeric material;

machining of said blank is undertaken using at least 5-axis machining;

said framework includes at least two female elements which are arranged to engage male elements, said female elements comprising sockets which are arranged to receive the aforementioned male elements and wherein walls which define the sockets include regions of thickness less than 1 mm;

said framework includes an area of at least 1 cm² which has a thickness of less than 1.5 mm;

the framework includes at least 4 holes which extend through the framework and have an area of less than 10 mm².

41. A framework for a prosthodontic device, said framework being machined, wherein said framework comprises a polymeric material which comprises a repeat unit of formula (I)

43. The framework according to claim 41, wherein:

said polymeric material comprises a repeat unit wherein t1=1, v1=0 and w1=0;

said framework includes no metal;

said framework includes at least two female elements which are arranged to engage male elements, said female elements comprising sockets which are arranged to receive the aforementioned male elements and wherein walls which define the sockets include regions of thickness less than 1 mm;

said framework includes an area of at least 0.5 cm² which has a thickness of less than 2 mm;

said framework includes holes which extend through the framework and have an area of less than 10 mm²;

44. The framework according to claim 43, wherein:

said framework includes regions of different roughnesses;

said framework is of a precision attachment denture or a telescopic denture;

said framework includes an area of at least 1 cm² which has a thickness of less than 1.5 mm; and

said framework includes at least 4 of said holes.