الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
One of the major causes of failure of endodontically treated teeth is fracture, which is related to the amount of healthy dentin remaining. Owing to endocrowns advantages, high success rate in restoring posterior ETT, their aesthetic appeal and the fact that minimally invasive preparations, with maximal tissue conservation, are now considered ‘the gold standard’ for restoring endodontically treated posterior teeth, endocrowns were applied as a prosthetic option in restoration of endodontically treated maxillary anterior teeth.
The aim of this study was to clinically evaluate using E-max Press crowns retained with fiber reinforced composite post and core system versus E-max Press endocrowns in anterior endodontically treated teeth regarding gross fracture, patient satisfaction and the marginal adaptation.
The present study included 24 patients seeking root canal treatment in anterior upper arch. Patients were assigned in two groups (n=12) according to the random allocation of patient. The first group received preparation for the IPS e.max crowns retained with fiber reinforced composite post and core and the second group received preparation for the IPS e.max endocrowns.
Endodontic treatment was done using rotary system and obturated using lateral condensation technique. For the first group, kleer fiber post and built it composite core were used for pot space preparation and core build up, then extra-coronal preparation was done with deep chamfer finish line. For endocrown preparation the pulp chamber was prepared with a 10o coronal divergence using tapered with round diamond stone and a depth of 4-5mm from the cavo-surface margin checked with periodontal probe, till the level of the canal orifice. The internal line angles were then rounded and smoothed then extra-coronal preparation was done following the same principles and steps done for the first group. Press technique was used for the fabrication of both restorations using IPS e.max press ingots using staining technique.
Marginal integrity and gross fracture were evaluated using USPHS criteria and a questionnaire was conducted to evaluate patient satisfaction, follow ups were done at 3,6,9 and 12 months. The data were analyzed using IBM SPSS Statistics for Windows, Version 23.0. Armonk, NY: IBM Corp.
Results: There was no statistically significant difference regarding gross fracture of both groups after 12 months (P-value = 0.093, Effect size = 0.447), meanwhile; there was a statistically significant difference between the two groups regarding marginal integrity after 12 months (P-value = 0.037, Effect size = 0.513). Fiber post and crown group showed statistically significantly lower prevalence of Bravo score than endocrown group. Regarding patient satisfaction there was a statistically significant difference between the two groups after 12 months (P-value = 0.047, Effect size = 0.447). Fiber post and crown group showed statistically significantly higher satisfaction than Endocrown group.