MTA versus Ca(OH)^sub 2^ in apexification of non-vital immature permanent teeth: a randomized clinical trial comparison

The aim of this prospective randomized clinical trial was to compare mineral trioxide aggregate (MTA) with calcium hydroxide (CH) as materials for inducing root apex closure in immature necrotic permanent incisors. The design of this study has been extensively described in the authors' previous report. Children (n=30), aged from 6 to 18 years and presenting a non-vital permanent incisor, were treated. Half of the group received treatment using MTA, the other half with CH. At recall visits after 6 and 12 months, the presence or absence of a calcified apical barrier was assessed using clinical and radiographic examinations. The anonymised radiographs were evaluated by two independent investigators. Statistical analyses were performed using a Fischer's test (p