The purpose of this study will be to evaluate the effect of direct and indirect pick up of the locator retentive caps and compare the clinical results with those of the manufacturer retentive force.
Patient selection: For this study, 30 patients were selected from the clinic of Prosthodontic Department, Faculty of Dentistry, Mansoura University. According to pick up technique for the locator retentive caps, the overdentures will be classified into two groups as follows; Group1: The retentive caps will be picked up by indirect method on the cast then by the direct method Group2: The retentive caps will be picked up in the patient by the direct method first then by the indirect method. For both groups, the clinical retention will be measured after using pink and blue retentive inserts respectively. All implants were inserted using computer-guided implant surgery and conventional loading protocol was used. Evaluation methods The clinical retention of each insert will be calibrated as regards the manufacturer's value. Also, the laboratory retention will be assessed for the two groups and calibrated as regards the manufacturer's value. Measurements will be done immediately, three and six months after each overdenture insertion.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
30
placement of two interforaminal dental implants in the canine region in the mandible
placement of locator attachment and insertion of mandibular overdenture
Christine Ibrahim
Al Mansurah, Egypt
measurement of overdenture retention
measuring the clinical retention of the locator retained mandibular overdenture by forcemeter
Time frame: three months
marginal bone loss
measuring crestal bone loss around dental implants in mm by digital radiography
Time frame: one year
plaque index
measuring plaque around dental implants using scoring system: 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.
Time frame: one year
gingival index
measuring gingival bleeding using scoring system: 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
Time frame: one year
pocket depth
measuring pocket depth around dental implants in mm using periodontal probe
Time frame: one year
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