Summary
Objectives
The aim of this study was to test the effect of a single‐implant mandibular overdenture (SIMO), compared with conventional complete denture (CD), on masticatory performance measured by the mixing ability of a two‐coloured chewing gum.
Methods
A sample of edentulous subjects was randomly assigned to the SIMO (n = 15) and CD (n = 19) groups. Patients in both groups received a set of new complete dentures, and the SIMO group received a single implant in the symphyseal region of the mandible (Straumann® Standard Plus SLActive®) and an eliptical matrix and ball attachment for denture retention. Masticatory tests were performed using a two‐colour chewing gum (Vivident Fruitswing, Perfetti van Melle, Turkey) for 20 and 50 chewing cycles. Colour‐mixing ability was assessed by electronic colourimetric analysis (ViewGum©, Dhal Software, Greece), expressed by the variance of hue. Tests were performed at baseline and at the 6‐ and 12‐month follow‐ups. Multilevel linear regression was used to model the changes in masticatory performance.
Results
Groups were similar at baseline for 20 and 50 cycles (P > 0.05). A significant linear effect was observed on time points for 20 and 50 cycles (P < 0.001). No difference was observed between treatment groups factor (P > 0.05). However, the way masticatory performance varied according to time points differed in the CD and SIMO groups for 20 cycles (P = 0.048).
Conclusion
Masticatory performance improved significantly after 12 months, irrespective to the insertion of a single implant to retain a mandibular overdenture. Moreover, results suggest that SIMO treatment may perform better than CD in the shorter follow‐up period.