Screw, tool and assembly for dental implantology
View Patent ↗The invention relates to a screw, a tool and a system for dental implantology, forming a fixing system and the components thereof to be used in a dynamic pillar assembly. Said dynamic pillar assembly is used in the production of prostheses on dental implants in human implantology in order to fix screws at an angle.
1. A screw for a dynamic pillar for dental implantology, the screw comprising a head at one end and a thread at an opposite end, wherein the head of the screw has an internal part (P- 1 -A) with female hexalobular form with a circular center and six circular depressions and six circular peaks alternating on the periphery, each circular depression defined by a same depression radius and each circular peak define by a same peak radius, said hexalobular form allowing an inclination of between 0° and 35° for the application of a tightening torque by a screwdriver; and
wherein, for each of the six circular depressions, a curve defining the circular depression is along the same depression radius and for each of the six circular peaks, a curve defining the circular peak is along the same peak radius;
wherein the head of the screw has an external diameter (DE- 1 ) from 1.8 mm to 2.7 mm, a greater internal diameter (DIMA- 1 ) from 1.3 to 2.4 mm, a smaller internal diameter (DIME- 1 ) from 1.0 to 2.0 mm, and an internal height (A 1 - 1 ) from 0.5 to 1.5 mm; and
wherein the depression radius is from 0.15 to 0.35 mm and the peak radius is from 0.15 to 0.35 mm.
2. The screw according to claim 1 , further comprising a mating screwdriver for driving the screw, the screwdriver comprising a male tip (C- 2 ) in semi-spherical form with curved inlets and protrusions (C- 2 -B) defining a male hexalobular form, said hexalobular form defined by alternating circular depressions and circular peaks, each circular depression defined by a same depression radius and each circular peak define by a same peak radius, said hexalobular form allowing an inclination of between 0° and 35° for the application of a tightening torque on a screw for the dynamic pillar for dental implantology; and
wherein the hexalobular form has a maximum external diameter (DE) from 1.3 mm to 2.4 mm, a maximum internal diameter (DI) in a range of 1.0 to 2.0 mm, radius of the depression (RCD) in a range of 0.15 to 0.35 mm, and a radius of the peak (RCC) in a range of 0.15 to 0.35 mm, and wherein the screwdriver has a total height (ATC) in a range of 18 to 35 mm.
3. The screw according to claim 1 , wherein a cone (ADC- 1 ) is formed between the thread and the head of the screw and an angle of the cone is from 25 to 65 degrees.
4. A screwdriver, for a dynamic pillar for dental implantology, comprising a male tip (C- 2 ) having a body in partial spherical form with curved inlets and protrusions (C- 2 -B) defining a male hexalobular form, said hexalobular form defined by alternating circular depressions and circular peaks, each circular depression defined by a same depression radius and each circular peak define by a same peak radius, said hexalobular form allowing an inclination of between 0° and 35° for the application of a tightening torque on a screw for the dynamic pillar for dental implantology; and
wherein the hexalobular form has a maximum external diameter (DE) from 1.3 mm to 2.4 mm, a maximum internal diameter (DI) in a range of 1.0 to 2.0 mm, radius of the depression (RCD) in a range of 0.15 to 0.35 mm, and a radius of the peak (RCC) in a range of 0.15 to 0.35 mm, and wherein the screwdriver has a total height (ATC) in a range of 18 to 35 mm.
5. An assembly for dental implantology, comprising a base (B) for coupling to the end of an implant; a guide tube (T) which comprises a body (T- 1 ) and a screw (P) which comprises a head (P- 1 ) in cylindrical form and a body (P- 2 ) with thread; wherein the head of the screw has an internal part (P- 1 -A) with a female hexalobular form with a circular center and six circular depressions and six circular peaks alternating on the periphery, each circular depression defined by a same depression radius and each circular peak define by a same peak radius, said hexalobular form allowing an inclination of between 0° and 35° for the application of the tightening torque by a screwdriver on the screw; and
wherein, for each of the six circular depressions, a curve defining the circular depression is along the same depression radius and for each of the six circular peaks, a curve defining the circular peak is along the same peak radius;
wherein the head of the screw has an external diameter (DE- 1 ) from 1.8 mm to 2.7 mm, a greater internal diameter (DIMA- 1 ) from 1.3 to 2.4 mm, a smaller internal diameter (DIME- 1 ) from 1.0 to 2.0 mm, and an internal height (A 1 - 1 ) from 0.5 to 1.5 mm; and
wherein the depression radius is from 0.15 to 0.35 mm and the peak radius is from 0.15 to 0.35 mm.