Complicated crown-root fractures are considered rare occurrences in young permanent dentition; however, they often present complicated and unpredictable treatment options. The most common treatment option for crown-root fractured teeth is reattachment of fractured segment, but if it is thought impossible to maintain, it should be extracted. However, when unfavorable crown-root fracture occurs in the adolescents, extraction of fractured teeth is expected to be poor due to excessive resorption of alveolar and prosthetic replacement cannot be performed immediately, various treatment options should be considered. This report suggests root submergence in the complex crown-root fracture in growing patients is performed and the functional and aesthetic results including preservation of the alveolar bone are obtained.

Abstract
 Ⅰ. INTRODUCTION
 II. CASE REPORT
  1. 증례 1
  2. 증례 2
 III. DISCUSSION
 REFERENCES

• 조은정(원광대학교 치과대학 소아치과학교실) | Eunjong Jo (Department of Pedodonics, College of Dentistry, Wonkwang University)
• 이제우(원광대학교 치과대학 소아치과학교실) | Jewoo Lee (Department of Pedodonics, College of Dentistry, Wonkwang University)
• 라지영(원광대학교 치과대학 소아치과학교실) | Jiyoung Ra (Department of Pedodonics, College of Dentistry, Wonkwang University) Correspondence