Purpose: This clinical study aimed to compare between single implant (symphyseal
and parasymphyseal) versus two implants in complete mandibular overdentures
by measuring retention force. Patients and methods: Fifteen completely edentulous
patients were selected for this study. The patients were divided randomly into three
equal groups (five patients in each group) according to implant position and number.
Group I: One median implant to retain mandibular complete overdenture. Group II:
One parasymphyseal implant to retain mandibular complete overdenture. Group III:
Two implants in the intraforaminal distance to retain mandibular complete overdenture.
Three months later the lower denture was converted into mandibular overdenture
by picking up the metal house into the denture. Retention force was measured for the
conventional complete denture after one month of denture insertion (Recorded as Base
line) and measured for implant retained overdenture at time of insertion, after three and
six months after over denture insertion by digital force meter. Results: There was a
significant difference between the three groups with a higher retention of group (C) than
groups (A) and (B), and non-significant difference between, group (A) and group (B).
In all test groups, there was increased retention during the follow-up period, with a statistically
significant difference from (Baseline) recording. Conclusion: The utilization
of a single implant positioned ( median or parasymphyseal) may offer an efficient treatment
option to retain mandibular overdentures in edentulous patients. This approach
becomes particularly valuable when limitations restrict the use of multiple implants.