Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1985-12-06
1987-10-06
Wilson, John J.
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433181, 433182, A61C 1312
Patent
active
046980202
ABSTRACT:
In order to activate, through a fine adjustment, the retention element (16) of an attachment for a partial, removable, dental prosthesis made up of two coulisses (1, 51), one of which being incorporated in the prosthesis (P) and the other (51) secured to a pillar tooth (D) there are utilized: a horizontal pivot (14) mounted in a sheath (2) and carrying, at one end, a retaining small head (16) and, at the other end, a bevel gear (5); and a cylindrical body (4') with vertical axis, mounted in a box (3) and carrying a bevel gear (4) which is in meshing engagement with the other hand gear (5). The base of the body (4') is provided with an operative groove (12) surfacing in the alveolar saddle (5) of the prosthesis (P). The rotation of the element (4') causes the displacement, along the pivot (14), of a plate (19) which compresses a counteracting spring (18) whose tensioning determines the retaining force of the attachment. The sheath (2) and the box (3) are held, in a removable way, in a container (1) associated with the coulisse incorporated in the prosthesis. The shape of the retention small head (16, 16', 16") in cooperation with the coulisse (51) secured to the pillar tooth, determines the working characteristics of, respectively, a rigid, semi-rigid, sprung, attachment.
REFERENCES:
patent: 1621702 (1927-03-01), Yantis
patent: 1664433 (1928-04-01), Seabrook
patent: 1863230 (1932-06-01), Shapiro
patent: 2572714 (1951-10-01), Funderburg
patent: 2705366 (1955-04-01), Van Dyk
patent: 3117377 (1964-01-01), Poreromo
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