关键词: 复杂冠根折, 牙撕脱性损伤, 牙再植术, 改良冠延长术, 牙根吸收

Abstract: Objective: This case presents a multidisciplinary treatment and one-year follow-up of complicated dental trauma occurred in upper anterior teeth, showing the diagnosis and treatment details at different stages of the dental trauma, hoping to provide reference for clinicians. Diagnosis and treatment: Female, 21 years old, visiting for the fracture and avulsion of upper anterior teeth. The surgeon performed multidisciplinary comprehensive treatment including tooth replantation and fixation, root canal treatment, modified crown lengthening surgery, fractured crown bonding, post and core crown restoration. Results: After 1 year follow-up, the crowns showed normal function with good marginal adaptation, stable gingival margin position and stable gingival papilla with no black triangle. Conclusions: Through multidisciplinary comprehensive diagnosis and treatment, ideal treatment results can be achieved for complicated crown-root fracture, which may maximizing the preservation of natural teeth.

Key words: complicated crown-root fracture, avulsions, replantation, modified crown lengthening surgery, root resorption