Comparative evaluation of two different implant lengths for implant‑assisted complete mandibular overdenture

Purpose To compare clinically and radiographically between two different implant lengths for implantassisted complete mandibular overdenture. Patients and methods Twenty completely edentulous male patients with age range 55–65 years old were equally divided into two groups, for group I a maxillary complete denture and a mandibular implantassisted complete overdenture were constructed for each patient using two implants with 3.6- mm diameter and 10-mm length with O-ring attachments were placed at the canine regions of the mandibular alveolar ridge while for group II a maxillary complete denture and a mandibular implant-assisted complete overdenture were constructed for each patient using two implants with 3.6-mm diameter and 12-mm length with O-ring attachments and placed at the canine regions of the mandibular alveolar ridge. Each patient was evaluated clinically as regards to patient satisfaction, gingival recession, probing depth, and stability test by using Osstell ISQ and radiographically by panoramic evaluation at denture insertion then after 3, 6, and 12 months. Data were collected and statistically analyzed using the unpaired t-test between the two groups and paired t-test within the same group. Results There was no statistical significance difference between the two groups as regards to clinical and radiographic evaluation; on the other hand, there was significant difference within the same group. Conclusion Two dental implants with length 10 mm are sufficient to assist complete mandibular overdenture with opposing conventional maxillary complete denture and there was no significance difference in implant stability between 10 and 12 mm dental implant length by using Osstell ISQ. According to the clinical results, based on the clinical parameters used in this study, the findings revealed healthy peri-implant conditions throughout the study period in both groups, with no significant difference between the two groups.