Inclusion Criteria:  For the Test Group  patients with implant-supported fixed restorations in at least one quadrant of the posterior region (pre-molar and molar) of both jaws at least for 1 year patients with Angle Class I in MIP patients who did not have orthodontic treatment  For the Control group, the inclusion criteria were:  - patients with completely dentate arches (not considering third molars) with a maximum of 4 tooth-supported restorations per dental arch).  Exclusion Criteria:  patients with bruxism, detrimental habits, and mandibular parafunctional activities patients with signs of temporomandibular dysfunction, trismus, or illness of the cervical spine patients with a history indicating problems with alcohol or drugs or receiving any psychiatric treatment.