Title:
骨スクリュー用の新規のねじの設計
Document Type and Number:
Japanese Patent JP7383307
Kind Code:
B2
Abstract:
An implant device (100d) for engagement with a bone of a subject, said the implant device (100d) comprising a distal end (102d), a proximal end (104d), a central shaft (106d), a longitudinal central axis (108d) and a helical thread portion (110d) having a leading edge (114d) and a trailing edge (116d). A portion of the leading edge (114d) extends in a direction towards the distal end (102d) of the implant further than the most distal portion of the root (112d) of the thread portion (110d); and wherein the trailing edge (116d) extends in a direction of from the most proximal portion of the root (112d) in a radial outward direction and towards the distal end (102d); and a crest portion (118d) disposed between the leading edge (114d) and the trailing edge (116d) and wherein said the crest portion (118d) forms a radially outward portion of the thread portion (110d). Hence, the implant device (100d) improved the axial pull-out strength and reduced stress concentration.
Inventors:
Fong, Xiao Len
Leon, Frankie Curry
Leon, Frankie Curry
Application Number:
JP2021566162A
Publication Date:
November 20, 2023
Filing Date:
May 09, 2020
Export Citation:
Assignee:
THE UNIVERSITY OF HONG KONG
International Classes:
A61B17/68
Domestic Patent References:
| JP2010057743A | ||||
| JP2012500030A | ||||
| JP2006136728A | ||||
| JP2015186649A |
Foreign References:
| US6402515 | ||||
| US4324550 | ||||
| US20150157425 |
Attorney, Agent or Firm:
Norito Yamao
Hiroshi Okabe
Kazuhisa Inaba
Hiroshi Okabe
Kazuhisa Inaba