Osteointegration

The aim of this trial was to find the optimal surface treatment for MP1TM screws for best Osteointegration.

Three surface treatments were tested:

No treatment
Abrasion with SiC
Abrasion + Ta deposition by Plasma
Coating and abrasion were tried in order to promote the osteointegration into the bone.

Screws were implanted in rabbits for 4-6 weeks.

Results:

Tensile strength of plucking screws (N.cm) due to osteointegration atfter various implantation times and different surface treatments of MP1TM

Time implanted in rabits

4 weeks

6 Weeks

No treatment

13.08

17.93

Abrasion with SiC

13.8

20.66

Abrasion + Ta deposition by Plasma

16.5

24.5



Trial 2:

24 screws of 2 designs treated with Abrasion + Ta deposition by Plasma and 24 screws of Ti (control samples) were implanted in sheep bone for 4-12 weeks.

Results were excellent (see opinion letter)