Complicated crown-root fractures are challenging for pediatric dentists to treat. Many treatment strategies have been proposed, each with their own advantages and disadvantages. The purpose of this report was to suggest a new method to treat a complicated crown-root fracture using fragment reattachment with the aid of a splint and an intracanal fiber post. It is recommended that the fractured fragment be stabilized to its original position instead of being extracted if the biological width is minimally invaded. Furthermore, the use of an intracanal post is recommended to reinforce the root in a horizontal root fracture.