A self-retaining screw assembly (10) comprising a dental secondary component (20) and a screw (30). The secondary component comprises a through passage (40) having an apical (41) and a coronal (42) open end, and a screw seat (43) located between said apical and coronal ends. The screw comprises a screw rod (32) and a screw head (31), the screw head being dimensioned to abut against the screw seat and the screw rod being dimensioned to pass unhindered through the through passage such that the apical end of the rod can protrude from the apical end of the through passage. The through passage further comprises, coronal of the screw seat, a first section (44) and, directly coronal of the first section a second section having a narrower diameter than the first section, such that the second section forms a restriction (45) in the through passage. The screw head comprises a radially outwardly extending retaining element (35). At least one of the restriction and retaining element is a resilient member deformable from a first, rest, position, in which the resilient member has a first diameter, to a second, stressed, position, in which the resilient member has a second diameter, the restriction and the retaining element being dimensioned such that the retaining element can only pass through the restriction when the resilient member is in the stressed position.La présente invention concerne un ensemble de vis auto-rétentive (10) comprenant un composant secondaire dentaire (20) et une vis (30). Le composant secondaire comprend un passage traversant (40) ayant une extrémité ouverte apicale (41) et une extrémité ouverte coronale (42), et un siège de vis (43) situé entre lesdites extrémités apicale et coronale. La vis comprend une tige de vis (32) et une tête de vis (31), la tête de vis étant dimensionnée de manière à être en butée contre le siège de vis et la tige de vis étant dimensionnée de manière à traverser sans difficulté le passage traversant de sorte que l'extrémité apical
