Corresponding Author

Sarah Ali Abd El Fattah Ghorab

Article Type

Original Article


Objectives: To assess the masticatory efficiency of conventional complete denture CD and two-implant mandibular overdentures (TIMOs) reinforced with polyether-ether ketone (PEEK) or cobalt-chromium (CO-CR). Materials and Methods: Ten complete edentulous individuals received CD. Upon completion of three months, measurement of masticatory efficacy was conducted (T3). After that, for each participant, the placement of two implants was carried out in the canine mandibular areas. After three months of osseointegration, each patient was delivered two mandibular overdentures: one was reinforced by metal (group I), while the other was reinforced by PEEK (group II). The masticatory efficacy test was thereafter performed for both overdentures using two different coloured chewing gums. This was carried out at the time of each overdenture insertion (T0) and three months later (T3). Results: At (T0) and (T3), there was a noticeable difference in masticatory efficiency between the traditional complete dentures and both (TIMOs) reinforced with metal or PEEK for CD (0.4267, ±0.0115), (P value 0.004*), metal TIMO (0.2245, ±0.0286), (P value 0.011*), and for PPEK TIMO (0.0726, ±0.0396), (P value 0.005*). Significant differences among different chewing stroke counts were identified as well (improved chewing efficiency with more strokes of chewing). Conclusion: In regard to masticatory efficiency, immediately and 3 months after insertion, two-implant combined mandibular overdentures (TIMOs) reinforced with PEEK frameworks are considered advantageous

for the management of edentulous patients. TIMOs, no matter the reinforcing material used, offered superior masticatory efficiency compared with complete dentures.


Implant overdentures, masticatory efficiency, strokes, Unmixed Fraction (UF).