Horizontal root fractures are rare in comparison to other types of injuries and the reported prevalence in the literature is between 0.05; and 0.07. The treatment and prognosis of root fractures depend on many variables, the most important being the length of time between trauma and treatment, degree of dislocation and mobility, site of fracture, fixation period, stage of root development, age of patient, and quality of treatment. The ideal healing type is hard tissue healing. The aim of these case reports is to present four different patients who had horizontal root fractures of immature permanent teeth treated by repositioning and fixation with good healing. Patients were referred to our clinic with a complaint of mobility and tenderness in their upper central incisors as a result of an orofacial injury. As a result of radiographical examination, horizontal fractures were diagnosed on the roots. Teeth were repositioned and rigid fixation was applied. Splints were retained for about 12 weeks. After splints were removed, patients were scheduled for follow-up visits at 3 month intervals. After long-term clinical and radiographical follow-up, all teeth presented positive response to electrical pulp tests, suggesting a repair of root fractures. These immature teeth showed radiographic evidence of continued root development and normal color and mobility, and no pain was observed in horizontal and vertical percussion tests. Patients reported no discomfort with their teeth. Using splints without any further treatment was found to be successful in the presence of suitable conditions for the treatment of horizontal root fractures.