A shaft coupling with a flexible annular sleeve, a driver end piece, and a driven end piece.

An abutment (9) has a contact surface (21) with is a substantially circular surface.

A rotational shaft (133) is securely provided to a butt (241) having a second mechanism part (M102) configured therein.

The tool string includes a shock reduction tool, which includes an anchoring tail piece axially and rotationally fixed to the at least one tubular.

The invention relates to a hose clamping device, comprising a clamping ring (2) for clamping a hose (8), pushed upon a tail piece (5), by radially inwardly pretensioning said hose.

There is provided at least at one abutment a recess (19) where a lower part of the associated abutment surface (6) and a part of the bottom surface (5) are removed.

After suturing and a healing period of one to one and half months, the site is reopened and a clinical crown or abutment is fixed to the submerged implant.

The lock includes a cylinder (16), an electronic control unit (18) which is housed within the cylinder, a tailpiece (20), and an electrically-operable clutch mechanism (22) which is housed within the cylinder (16).

A shaft coupling with a flexible annular sleeve, a driver end piece, and a driven end piece.

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An abutment (9) has a contact surface (21) with is a substantially circular surface.

The operation portion is provided with a first butt joint (123) for butt junction.

A rotational shaft (133) is securely provided to a butt (241) having a second mechanism part (M102) configured therein.

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