Investigation of Biofilm Formation on Temporary push-on Rings of Implant Crowns

Inclusion Criteria: * Informed Consent signed by the subject * Presence of one or more bone level titanium implant prior to insertion of the final restoration * No systemic illness * No heavy smoking (smoking \<10 cigarettes/day) * No pregnancy * No active periodontitis (probing pocket depth ≤4 mm) * No pharmacological treatment or antibiotic therapy during or up to three months before the study Exclusion Criteria: * Systemic illness (e.g. Diabetes) * Heavy smoking (smoking \>10 cigarettes/day) * Known or suspected non-compliance, drug or alcohol abuse * Pregnancy * Active periodontitis (probing pocket depth \>4 mm) * Pharmacological treatment or antibiotic therapy during or up to three months before the study