Intelligibility and Acoustic Speech Performance of CAD/CAM Milled Titanium Partial Dentures

Inclusion Criteria: * Patients with Class IV Kennedy Classification partial edentulism. * Sufficient occluso-gingival height of its clinical crown * Full opposing arch or restored with acceptable restoration * Edentulous ridge covered by healthy firm muco-periosteum * The abutment teeth had apparently good periodontal condition * Adequate inter-arch space * All patients were apparently in good general health * Only patients who can be easily motivated to achieve and maintain good oral hygiene were selected Exclusion Criteria: * without abnormal bony irregularity or sever lingual undercut * with no signs of mobility or inflammation with no tissue undercut * Patients with shallow floor of the mouth, prominent lingual tori, bony undercuts and lingual inclined teeth were all excluded * no tempro-mandibular joint disorders * free from systemic diseases as diabetes mellitus