Two Versus Four Implant-supported Fixed Full-arch Prosthesis

Two Versus Four Implant Supporting Fixed Full-arch Screw-retained Metal Acrylic Hybrid Mandibular Prosthesis.(A Study of Patient Satisfaction)

The aim of this study will be the evaluation of patient satisfaction and oral health-related-quality of life (OHRQoL) of two versus four implants supporting fixed full-arch screw-retained metal acrylic hybrid mandibular prosthesis.

Six completely edentulous patients will be selected for this study from the outpatient clinic of the prosthodontic department All patients will be informed about all surgical and prosthodontics procedures that will be done for them. All patients will sign the consent form of the ethical committee in faculty dentistry Mansoura University. The patients will be divided into 2 groups Control group: will receive implant-supported mandibular fixed metal acrylic prosthesis on 4 implants that were placed according to the "All on four concept". Study group: will receive implant-supported mandibular fixed metal acrylic prosthesis on two implants placed according to "All On two concept".

will receive implant-supported mandibular fixed metal acrylic prosthesis on 4 implants that were placed according to the "All on four concept".

will receive implant-supported mandibular fixed metal acrylic prosthesis on two implants placed according to "All On two concept".

Regarding VAS, participants were asked to score their answer according to the amount of satisfaction on a 100mm line (Score zero = no satisfaction at all and score 100 = complete satisfaction). The questions cover several items related to prosthesis such as: retention, stability, comfort, ease of cleaning, ease of speaking, ease of chewing, limited activities due to embarrassment, quality of bolus and appearance

evaluation of plaque accumulation around dental implants using scores.score 0; absence plaque , score 1; plaque only detected by a probe passing through the smooth marginal surface of the implant, score 2; plaque can be recognized by naked eye, and score 3; plenty of soft matter

evaluation of gingival bleeding using scoring system as following: scores.0; no bleeding when a periodontal probe is passed along the mucosal margin, 1;isolated bleeding spots visible, 2; blood forms a confluent red line on the mucosal margin, 3;heavy or profuse bleeding.

The oral Health impact profile (OHIP-14) questions were utilized to assess OHRQoL. The questions were composed of seven domains

Inclusion Criteria: • Eligible patients needed must have Sufficient interarch space (at least 15 mm from the occlusal plane to the mandibular ridge) to provide space for fixed prosthesis construction all patients should be completely edentulous patients with resorbed mandibular ridge all patients must be angle class I Exclusion Criteria: systemic diseases that contraindicate implant placement bone metabolic diseases such as diabetes mellitus irradiation of the head and neck region chemotherapy within the past 3 years smoking habits.