Patient Satisfaction and Bone Changes for OT Cap and OT Vertical Attachment

Inclusion Criteria: * patients age ranged between 35-45years old. * All patients have Kennedy class I partially edentulous mandibular arch in which the last remaining teeth were the second premolars bilaterally. * The abutment teeth had an apparently good periodontal condition with no signs of mobility or inflammation with firm and healthy mucosa. * Edentulous ridge covered by health firm mucoperiosteum, without abnormal bony irregularity or severe lingual undercuts. * Patients with normal relationship of maxilla and mandible (Angle class I ridge classification) and sufficient inter-arch space (6mm) the size of the attachment * The opposing dentition is intact arch with no noticeable over eruption or tilting or restored with acceptable fixed restoration. * All patients are free from neurological, muscular disorders and tempro-mandibular joint disorders. * Only patients who can be easily motivated to achieve and maintain good oral Exclusion Criteria: * Patient with limited skills * Un co-operative patients. * patient with bad oral hygiene