Objective: To investigate treatment strategies for chronic periapical periodontitis in prematurely erupted premolars and provide guidance for managing pulp and periapical diseases in young permanent teeth with immature roots. Methods: A regenerative endodontic procedure (REP) was performed on a prematurely erupted maxillary left first premolar (tooth 24) at Nolla stage Ⅶ with chronic apical periodontitis, following standardized protocols including root canal irrigation, disinfection, and coronal sealing. The case was followed up, and a literature review was conducted. Results: Clinical resolution of symptoms was observed on tooth 24, with sustained root development. After a 20-month follow-up, the tooth had restored biological function. Literature synthesis revealed that periapical infections in prematurely erupted permanent teeth predominently arise from pulp exposure and bacterial infection, with retrograde infection being rare. For young permanent teeth with necrotic pulp, regenerative endodontic procedures has been established as the treatment of choice to promote apical closure and root maturation. The critical steps of regenerative endodontic procedures include thorough disinfection, induced bleeding to form a fibrin scaffold, and coronal sealing to facilitate stem cell recruitment and differentiation. Conclusion Regenerative endodontic procedures represents an effective and viable treatment option for prematurely erupted young permanent teeth with chronic periapical periodontitis.

ObjectiveTo investigate the human resources arrangement of rehabilitation wards in general hospital.MethodsAll works of the nurses in a rehabilitation ward within 7 days were recorded with data of average man hour of Taiwan's Hospital as the standards, the daily working hours of the related number of the nurses were calculated correctly on the missing items.Resultsthe ratio of beds to nurses was 1∶0.45, the work consumed the longest time was transfusion, others followed were medical observation, distribution of medicines, prevention of bedsore, change of bed sheets and health education and so on.ConclusionThe number of hours of rehabilitation care is to be increased; it will be more reasonable to arrange rehabilitation care training in the evenings.