DE20112507U1 - Self-tapping cylinder screw implant with multi-start thread - Google Patents

Description

Self-tapping cylinder screw implant with multi-start thread

3. Description

• The self-tapping cylinder screw implant has a significant innovation: a conical threaded part with a steep thread pitch (up to 45 degrees), whereby the screw spirals (4) are arranged with multiple threads.

The resulting benefits will be described in detail later.

The current state of the art includes a wide range of cylindrical or conical screw implant systems (both self-tapping and non-self-tapping), all of which have one common feature: they have only one thread spiral with a low pitch, so that many turns are required when screwing in the implant body.

For implants with a cylindrical screw core shaft, this means considerable micro-abrasion, especially in the upper part of the bone hole.

The greater the roughness depth of the coating, the more the micro-bone structure is traumatically altered. The conical self-tapping cylinder implant with a multi-start screw helix and steep pitch offers the following advantages when screwing in:

1.Insertion of the conical implant to 2/3 of the length without rotation, due to the cylindrical bore and the subsequent conical core hole drilling.

2. Reduced rotation due to the high thread pitch (one to two turns when screwing in).

3. Complete coverage of the screw shaft by the screw helices due to the multi-start screw helices.

4. Maximum surface bone contact of the implant with multi-start screw coils.

5. Gentle cutting of the screw coil, therefore little friction

6. Pressure support in the direction of load through slight sawtooth profiling of the screw spirals.

7. Distribution of any bone replacement material to be used via the ring canal into the side canals during screwing (stamp pressure effect).

Self-tapping cylinder screw implant with multi-start thread

3. Description (continued)

■The axial threaded blind hole of the cylinder screw implant allows the use of various screw abutments, precisely prefabricated with a tapered, smooth-polished neck (12) for passage through the gingiva. If the parallelism of the conical abutments requires it, the abutment head can be re-bent, both intraorally and on the master model.

The use of cover screws (17) allows stress-free healing under the gingiva (two-phase method). The new implant system can be used universally for the following indications:

1. Single tooth replacement (immediate - late implant).

2. Toothless upper/lower jaw two-phase. With bar connection and more than two implants also single-phase.

3. Interconnected gaps and free-end situations. With more than two implants, also single-phase, thanks to the optimal primary fixation.

The surgical procedure is standardized thanks to a simple drill set:

1. Rose drill 004 to determine the drilling center. ''

2. Twist drill for pilot drilling.

3. Countersink drill for cylindrical implant hole.

4. Conical shell drill for conical core hole drilling.

Drills 2, 3 and 4 are provided with a depth marking for the different implant lengths.

The mechanical / electrochemical roughening of the screw portion |

and the hydroxyapatite coating of the cylindrical part allow

due to the slight microtraumatization of the cancellous ■!

When screwing in the self-tapping screw implant, rapid tissue regeneration in the sense of osseointegration can be expected from the bone substance, with optimal primary stabilization.

The implant system, which is designed for three different diameters (3.5, 4.5 and 5.5) and four different lengths (12, 14, 16 and 18 mm), has a wide range of indications due to its simple surgical insertion.

Self-tapping cylinder screw implant with multi-start thread

1. Drawing legend

Implant body

1. Bevel groove

2. Puncture

3. Longitudinal groove

4. Multi-start taper thread

5. Centering point

6. Threaded blind hole

7. Hexagon socket

8. Sealing cone (neg.)

Construction

9. Threaded shaft

10. Smooth shaft

11. Sealing cone (pos.)

12. Neck

13. Adhesive grooves

14. Driving rilies

15. Threaded blind hole

16. Screw plug - structure

Cover screw

17. Closure screw - implant

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Claims (1)

Self-tapping cylinder screw implant with multiple thread ( 4 ), characterized in that 1. the screw coils ( 4 ) are arranged multiple times (two, three or four times). 2. according to claim 1, characterized in that the cylindrical implant body merges into the conical threaded part which ends in a centering tip ( 5 ). 3. according to claim 1 and 2, characterized in that the screw coils only rest in the region of the conical threaded part. 4. according to claim 1, 2 and 3, characterized in that the screw coils completely cover the core shaft. 5. according to claim 1, 2, 3 and 4, characterized in that the screw spirals have a slightly sawtooth-shaped profile cross-section, with the inclination towards the centering tip ( 5 ). 6. according to claim 1, 2, 3, 4 and 5, characterized in that the transition from the conical to the purely cylindrical part has a circular recess ( 2 ). 7. according to claim 1, 2, 3, 4, 5 and 6, characterized in that the cylindrical part has channel-like milled recesses ( 1 ) in the direction of rotation of the screw coils. 8. according to claims 1-7, characterized in that the cylindrical implant portion has a central threaded blind hole ( 6 ) beginning with a hexagon socket ( 7 ). 9. according to claims 1-8, characterized in that the conical part and the cylindrical part can be coated differently. 10. according to claims 1-9, characterized in that longitudinal grooves are milled in the threaded part parallel to the axial direction.