Clinical Performance of Long-span Fixed Partial Dentures

Exclusion Criteria

• •Pregnancy and lactation
• •Local and / or systemic acute and / or chronic (also in the past) general medical diseases and conditions that contradict participation in the study and / or expose the patient to a higher risk in the case of participation in the study.
• •Severe bruxism diagnosed by a portable electrocardiomyography device (BruxOff) (\> 4 bruxism episodes / night)
• •Reduced clinical crown height (\< 5 mm before tooth preparation)
• •Limited periodontal health:
• •* probing depths \> 4 mm or = 4 mm and bleeding on probing,
• •* Furcation involvement \> I (first band of the periodontometer after Naber disappears completely)
• •* Degree of loosening of the abutment teeth \> Grade I (\> 1 mm horizontal mobility)
• •Untreated endodontic problems of abutment teeth
• •Lack of antagonistic support from fixed dentures or natural teeth
• •Known allergies or intolerances to the materials used in the study
• •Lack of oral hygiene
• •Lack of compliance
• •Planned change of residence
• •Rejection of randomisation