57 results about "Screw retained" patented technology

A unitary acetabular cup prosthesis for a deficient acetabulum of a hip bone having a cup portion and a pair of adjacent screw retaining members extending from the cup and oriented in a cooperative with one another. A second pair of screw retaining members are preferably provided, with the first and second pair of screw retaining members oriented such that the prosthesis can be used in either a left or a right acetabulum of the patient. The screw retaining members may be formed on a single flange. The screw retaining members are fixedly inclined and offset relative to the rim of the cup. Each screw retaining member has a threaded hole inclined relative to the rim such that an axis of the threaded hole converges toward the axis of the cup portion in one dimension and is oblique to the axis of the cup portion in a second dimension.

A dental implant adaptor which is particularly suitable for dental crown implantation using a screw-retained protocol has a hollow body that can be mounted on a dental implant. The body includes a crown-receiving portion on which a dental crown can be mounted. The portion has a distal end and a proximal end and includes a first anti-rotation formation to prevent rotation between the adaptor and the crown. The body also has a laterally projecting collar at the proximal end of the crown-receiving portion which, in use, locates on the implant. There is also a second anti-rotation formation shaped for non-rotational engagement with the implant. The crown-receiving portion and collar together have an overall axial length in the range 3.5 mm to 7 mm and the collar has an axial thickness of 1.5 mm or less. Another described is an implant assembly incorporating the adaptor.

A unitary acetabular cup prosthesis (1) for a deficient acetabulum of a hip bone having a cup portion (10) and a pair of adjacent screw retaining members (51, 52) extending from the cup. A second pair of screw retaining members are preferably provided, with the first and second pair of screw retaining members oriented such that the prosthesis can be used in either a left or a right acetabulum of the patient. The screw retaining members may be formed on a single flange. The screw retaining members are fixedly inclined and offset relative to the rim (18) of the cup. Each screw retaining member has a threaded hole (55, 56) inclined relative to the rim such that an axis of the threaded hole converges toward the axis of the cup portion in one dimension and is oblique to the axis of the cup potion in a second dimension.A prosthesis for a deficient acetabulum of a patient having a cup portion and a flange member. The flange member has a base portion that extends upward along a portion of the upper rim. A generally planar screw retaining portion extends from the base portion, and is inclined from the base portion such that at least a lateral portion of a lower surface of the screw retaining portion is positioned below the upper rim while an upper surface of the screw retaining portion is positioned above the upper rim. The screw retaining portion has a first threaded hole, a second threaded hole and a neutral threaded hole, with the neutral hole positioned between the first and the second holes. The holes are inclined at certain orientations to allow for fixation with screws in a deficient acetabulum, and for use in a left or right hip.

A screw-belt advancing mechanism of a screw driving gun includes a barrel unit, a sliding unit connected telescopically to the barrel unit and movable relative thereto between extended and retracted positions, a pivot pin mounted on the sliding unit, and a spring-biased lifting member to engage releasably a screw-retaining belt fed into the sliding unit. The lifting member is pivoted to the pivot pin, and is associated with the sliding unit in such a manner that the lifting member is moved toward the barrel unit and pivots about the pivot pin in a first direction so as to push the screw-retaining belt to a desired position, in which, a selected screw on the screw-retaining belt is aligned with a driving shaft in the barrel unit when the sliding unit slides from the extended position to the retracted position.

A waterproof structure for a tightening section where a first member (1) having a screw hole (1a) with a bottom and a second member (2) having a screw insertion hole (2a) are fastened with a screw (4) that is inserted into the screw insertion hole (2a) and screwed to the screw hole (1a). The screw (4) is a flat head screw, and an annular groove (3b) is formed in the outer surface of a spacer (3) having an insertion hole where recessed circular conical surface (3a) is formed. The spacer (3) is fitted in the screw insertion hole (2a) to be in surface contact with a circular conical surface of a head of the flat head screw. The annular groove (3b) is coaxial with the recessed circular conical surface (3a). An O-ring (5) is installed in the annular groove (3b), and the flat head screw (4) is tightened with the spacer (3) placed between first member and the second member, causing the O-ring (5) to be pressed between an inner surface of the annular groove (3b) and a surface of the screw insertion hole of the second member (2). The waterproof structure can be repeatedly used without damaging the members and does not enlarge a necessary space.

A bone plate assembly utilizing at least one bone screw for fixation of adjacent bones of a spine including a base plate having at least one aperture extending therethrough and screw retaining mechanism mounted and movable on the plate between locked and unlocked positions relative to the aperture for preventing the bone screw from backing out from the base plate.

A screwdriver having a retention mechanism for temporarily holding a screw in place on its tip while the screw is being positioned, rotated or removed. More particularly, a screwdriver with a cruciform head used in the installation and removal of bone screws during maxillofacial surgery.

A storage system allows secured attachment in a device, such as a refrigerator, a freezer, a medical cart or the like, having a shelf comprising spaced-apart wire rack ribs. The storage system has a body with top and bottom walls, side walls, a rear wall, and an open front face opposite the rear wall, the top wall having a pair of spaced-apart apertures. A front door, hingedly attached to the body, is sized to fully close the front face when attached thereto. The body is attached to the shelf using a screw and a screw-retaining member, with the screw-retaining member operating to secure the ribs of the shelf between itself and the body. A screw, with its head located inside the body, passes through one of the apertures and is threadingly secured to the screw-retaining member.

A hybrid temporary anchorage device implant system and method of use is disclosed. A temporary anchorage device (TAD) implant includes an external hex head, a cupped inner portion, a threaded core, a platform, and an implant portion. A first abutment is installed on the implant portion. The first abutment may include a graduated portion, a screw-retained healing collar, and a threaded portion. A second abutment may be installed over the first abutment. The second abutment may include a graduated head, a bulbous base, and an inner canal.

A conversion abutment that cements onto one-piece dental implants that convert the one-piece implant use to a retrievable screw retained implant use in retaining complete dentures, hybrids, partial dentures, or fixed screw retained crowns or bridges, allowing the flexibility to retain and remove these restorative prostheses. These conversion abutments can be fabricated as angled conversion abutments to be used with single or multiple implants placed at various angulations. The conversion abutment system consists of three parts: a cementable conversion abutment (straight or angled), a coping (short or extended), and an occlusal screw. The bottom part (or apical portion) of the implant conversion abutment will cement over the one-piece implant in use, while the top (or coronal portion) will allow a screw to fit through a coping into the implant conversion abutment, screwing the prostheses into place.

The mounting structure of the circuit board connector 1 which is conductively connected with a circuit board 3 installed in a case 2 and fixedly mounted to the case 2 comprises a connector housing 4 for joining the circuit board connector 1 with a mating connector, and a terminal 7 including first contactors 5 to be coupled with corresponding terminals of the mating connector and second contractors 6 to be conductively connected to the circuit board 3, wherein the connector housing 4 is located closer the case 2 than the circuit board between the circuit board 3 and the case 2 and fixedly tightened to screw retaining portions 8 of the case.