US 12,295,802 B2
Ceramic mill blank for dental cutting and machining
Shuhei Takahashi, Kyoto (JP); Satoshi Fujiwara, Kyoto (JP); and Munehira Takenaka, Kyoto (JP)
Assigned to SHOFU INC., Kyoto (JP)
Filed by SHOFU INC., Kyoto (JP)
Filed on Aug. 16, 2023, as Appl. No. 18/234,611.
Claims priority of application No. 2022-130276 (JP), filed on Aug. 17, 2022; and application No. 2023-079733 (JP), filed on May 12, 2023.
Prior Publication US 2024/0252292 A1, Aug. 1, 2024
Int. Cl. B32B 7/12 (2006.01); A61C 13/00 (2006.01); B32B 3/30 (2006.01)
CPC A61C 13/0022 (2013.01) [A61C 2201/00 (2013.01); B32B 3/30 (2013.01); B32B 7/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A ceramic mill blank for dental cutting and machining, wherein,
the ceramic mill blank for dental cutting and machining comprises a ceramic portion to be cut and machined and one or more seal members,
the ceramic portion consists of a ceramic material which is not finally sintered,
the ceramic portion has an outer peripheral surface which is engageable with a holding tool,
the one or more seal members are provided on the outer peripheral surface of the ceramic portion,
a length of the one or more seal members is 50% or more of a length in a circumferential direction of the outer peripheral surface provided with the one or more seal members,
the one or more seal members are provided with an adhesive material on at least one side, and
the one or more seal members have a seal strength within a range of 1 to 50 N/9 mm when the one or more seal members having a width of 9 mm are peeled off from the outer peripheral surface of the ceramic portion at a speed of 1 cm/sec.