DENTIGEROUS CYST ASSOCIATED WITH FORMOCRESOL PULPOTOMY

Ju, Tae-Joon; Park, Ho-Won; Lee, Ju-Hyun; Seo, Hyun-Woo

Journal of the Korean Academy of Pediatric Dentistry 2009;36(3):481-488.
Published online August 31, 2009.

DENTIGEROUS CYST ASSOCIATED WITH FORMOCRESOL PULPOTOMY

Tae-Joon Ju, Ho-Won Park, Ju-Hyun Lee, Hyun-Woo Seo

Department of pediatric dentistry, College of dentistry, Kangnung-Wonju national university

Formocresol pulpotomy와 연관된 함치성 낭종의 치험례

주태준, 박호원, 이주현, 서현우

강릉∙원주 대학교 치과대학 소아치과학교실

Correspondence: Ho-Won Park, Tel: 033-640-3158, Email: pedo@kangnung.ac.kr

Received: 13 April 2009 • Accepted: 30 June 2009

Abstract

Buckley's formocresol was first introduced as a pulp medicament in 1904, and since 1930, it has been the treatment of choice for primary molar pulpotomies. Formocresol has fixation effect of pulp tissue and high clinical success rate. But side effect such as displacement and loss of permanent successor, amelogenesis imperfecta, cyst formation, mutation by general absorption, possibility of cancer induction have been reported. Of those, dentigerous cyst can form in the periradicular region after formocresol pulpotomy caused by an alteration of the reduced enamel epithelium, which result in fluid accumulation between the epithelium and the tooth crown. The present case describes a 6-year-old girl who had accidentally discovered in the panoramic radiograph a single, well-defined, radioluscent area enclosing the second unerupted mandibular premolar. The second left primary molar had been pulpotomizied 3 year before. Surgical treatment was carried out, the primary molar was extracted and cystectomy was performed under local anesthesia. In the extracted second primary molar, formocresol cotton pellet was left in the pulp chamber. Histologic study confirmed the suspected diagnosis of dentigerous cyst. This report present a case of dentigerous cyst associated with inadequate formocresol pulpotomized deciduous molar.

Key Words: Formocresol, Dentigerous cyst, Primary molar, Pulpotomy