Table 2 Inclusion and exclusion criteria of the study

Symptomatic bunion with radiographic correlates

Operations on the symptomatic foot in the past

Patients aged 40-79

BMI> 32

Female fertile patients: obligate practice of two different secure contraceptive methods

Pregnancy or lactation

Normal function of the lower extremity

Neurological pathologies

Bone mineral density abnormalities (e.g. radiographic detected bone cysts in the first ray, manifested osteoporosis)

Allergies against study products (components of the screws)

Substitution of magnesia or manifested hepato-renal diseases with possibel resulting bone mineral density abnormalities

Participation in other studies 30 days before the start of this study and during the participation in this study