Background@#Foreign bodies may be embedded or left behind in the oral cavity during oral surgical procedure. The loss of instruments such as impression material, surgical gauze, and broken injectionneedles are commonly reported in the dental field. These complications are generally symptomatic and show signs of inflammation, pain, and purulent discharge. Accidental breakage of sutureneedles is a rare but potentially dangerous event.Case presentation In this report, we present one case of lost sutureneedle during the procedure of flap operation at local dental clinic and its successful removal under local/general anesthesiaadministration via CBCT with a help of two reference needles to localize the 6-0 nylonneedle and consulting with the clinician. @*Conclusion@#CT scanning taken while mouth-closing may not be accurate with regard to real location measurement performed while mouth-opening. If so, other up-to-date radiographic devices and methods to retrieve a needle are recommended.