Dear Editor,We read with great respect the umbrella review by Zarzar et al on the efficacy of implant applications in patients with head and neck cancer (HNC) who have undergone radiotherapy (RT), which is not well-defined and holds many uncertainties. 1 The primary objective of this study was to determine the long-term success rate of dental implants in patients who underwent RT for HNC, while the secondary objective was to examine the incidence of implant-related complications in this patient population. The authors examined 24,996 implants in 5487 patients over one month to 23 years, with an 86.2% success rate for patients who received RT and 95.5% for those who did not.