The purpose of this study aimed to answer a clinical question whether In a patient with bilateral distal extension area, would the metal framework partial denture with OT vertical attachment versus partial denture with OT CAP attachment result in better patient satisfaction?

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