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Observation of an extracted premolar 2.5 years after mineral trioxide aggregate apexification using micro-computed tomography

 Gayeon Lee  ;  Chooryung Chung  ;  Sunil Kim  ;  Su-Jung Shin 
 Restorative Dentistry & Endodontics, Vol.45(2) : e4, 2020-05 
Journal Title
 Restorative Dentistry & Endodontics 
Issue Date
Apexification ; Dens evaginatus ; Microcomputed tomography ; Mineral trioxide aggregate
Although numerous studies have been conducted on apexification using mineral trioxide aggregate (MTA), direct observation of extracted human teeth after the procedure has been rarely reported. This case report describes a mandibular premolar treated 2.5 years ago and extracted recently for orthodontic treatment. The tubercle of the right mandibular premolar of a 12-year-old boy with dens evaginatus was fractured and the pulp was exposed. The tooth was diagnosed with pulp necrosis and asymptomatic periapical abscess. During the first visit, copious irrigation was performed with 2.5% sodium hypochlorite. Calcium hydroxide paste was placed as an intracanal medicament. The sinus tract had disappeared at the second visit after 3 weeks. MTA was applied on to the bleeding point as a 4-mm-thick layer, followed by a 3-mm-thick gutta-percha filling and resin core build-up. After 2.5 years, the tooth and three other premolars were extracted for orthodontic treatment. The right and left mandibular premolars were scanned with micro-computed tomography to determine the root shape and canal anatomy. Irregular root growth was observed and the root outline of the right mandibular premolar differed from that of the contralateral tooth. Apexification with MTA leads to the formation of roots with irregular morphology, without any pulpal space.
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Sun Il(김선일) ORCID logo https://orcid.org/0000-0002-8889-9844
Shin, Su Jung(신수정) ORCID logo https://orcid.org/0000-0001-5795-3919
Chung, Chooryung J.(정주령) ORCID logo https://orcid.org/0000-0001-9399-7193
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