Patient Perception and Oral Function of Implant Restorations

Inclusion Criteria: * Partially edentulous subjects with missing posterior teeth (Kennedy class I or class II) in the upper or lower jaw, in need for fixed implant-supported crowns to replace the missing teeth are offered to be enrolled if they fulfill the following inclusion criteria. The participants must be in good health and with no contraindications for undergoing dento-alveolar surgery. Exclusion Criteria: * Untreated or active, progressive periodontitis * Intake of (high dose) antiresorptive medicine or earlier medication related osteonecrosis of the jaw * Therapeutic radiation to the head and neck * Uncontrolled diabetes or systemic corticosteroids * Heavy smoking (\>20 cigarettes/day) * An inability to open the mouth wide enough to place implants * Decayed or unrestored anterior/premolar teeth * Need for major bone augmentation (e.g., bone block graft, extensive augmentations with second operation for implant insertion) * \< 8 mm bone height to the alveolar nerve or sinus maxillaris * Parafunctional habits or untreated temporomandibular dysfunctions or orofacial pain * Unable to cooperate or too ill to complete the experiment * Lack of signed informed consent