The aim is to test the influence of surface finish on biofilm formation on the transmucosal part of zirconia implants in an in vivo study. Sixteen test person will therefore receive an orthodontic apparatus containing the specimens with the respective surfaces and carry them for 2x 24h. The primary outcome is the spectormetrical quantification (OD value) of biofilm on the specimens that have been carried by the test person over 24h. Biofilm will be analysed using scanning electron microscopy.

Inclusion Criteria:

• No systematic antibiotic therapy during the last 3 months
• Good oral health and compliance (PI and BI <20%)
• No sign of parodontal disease or other inflammatory changes in the mouth
• Non-smoker

Exclusion Criteria:

• Disease that requires antibiotic therapy
• Pressure marks due to the orthodontic apparatus that can not be eliminated
• Other unexpected complications that could be related to the orthodontic apparatus