A study in two centres of variations in the time of apical barrier detection and barrier position in nonvital immature permanent incisors

Abstract

Summary. Objectives. To study barrier formation in nonvital, immature permanent incisors being treated using the apexification technique in two centres, and to establish the effect of the frequency of change of calcium hydroxide (CaOH) on barrier detection times. Design. A retrospective study of the time of detection and the position of barriers. Results. There were no significant differences between the two centres in terms of the average frequency of change of each CaOH dressing, the distribution of barrier detection times or the position of barriers (P > 0·05). There was a total of 107 teeth and the time of barrier detection was significantly earlier in more frequently dressed teeth (P = 0·013). Of the teeth with a barrier detection time of less than 9 months, 60.7% were dressed more frequently than every 3 months, as opposed to 39·1% of teeth with longer barrier times (P = 0·027). The mean time of barrier detection for all cases was 43·3 weeks. The majority of barriers were located at or near the apex. Conclusion. The frequency of change of CaOH can increase the speed of barrier detection but does not appear to affect the position.

Successful closure of the root apex in non-vital permanent incisors with wide open apices using single calcium hydroxide (caoh) dressing - report of 2 cases

“…There are number of studies (11,13) showing that, when the frequency of change was low, rapid barrier formation was seen and there were also some studies where the frequency of change was high, there was slow barrier formation. Hence it is confirmed that, if the root apex is disturbed by repeated instrumentation and dressing changes, then the time required for apex formation prolongs (14). Thus a single dressing is enough to induce the apical barrier formation.…”

Treatment of immature teeth with nonvital pulps in adults: a prospective comparative clinical study comparingMTAwith Ca(OH)2

“…, , Yates , Kinirons et al . , Damle et al . ), hydrogen peroxide (Thater & Marechaux ) and less concentrated 0.5% NaOCl (Dominguez Reyes et al .…”

“…, Yates , Kinirons et al . ), which also leads to difficulty of the patient's recall management and delayed treatment (Metzger et al . ).…”

“…, , Thater & Marechaux , Yates , Kleier & Barr , Morfis & Siskos , Cvek , Finucane & Kinirons , Kinirons et al . , Dominguez Reyes et al . ).…”

Suggesting a new therapeutic protocol for permanent teeth with incomplete root apex and lateral luxation: A case report

“…19,[28][29][30][31] Periodic changes every 1 to 3 months are widely recommended. 21,24,25,32 However, Yates, 21 Chawla 33 and Webber 34 recommend intracanal dressing change every time a radiographic examination reveals incomplete filling. Furthermore, according to Sidley,35 periodic changes every 4 to 6 months during 18 months yield satisfactory treatment outcomes for severely traumatized teeth.…”