{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T19:40:24Z","timestamp":1792266024205,"version":"4.4.0"},"reference-count":28,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2012,11,19]],"date-time":"2012-11-19T00:00:00Z","timestamp":1353283200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Dental Traumatology"],"published-print":{"date-parts":[[2013,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Traumatized immature teeth present a unique challenge during treatment, both endodontically as well as restoratively. Hence, the purpose of this study is to evaluate the type and depth of restoration that would be effective in simulated immature maxillary anterior teeth in terms of fracture resistance and mode of failure.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>Seventy\u2010five extracted human maxillary anterior teeth were used in this study that was standardized to a length of 13\u00a0mm. Instrumentation of the canals was performed after which a Peezo no. 6 was taken 1\u00a0mm past the apex to simulate an incompletely formed root. <jats:styled-content style=\"fixed-case\">MTA<\/jats:styled-content> apexification was simulated after which all the teeth were mounted and a 3\u2010mm\u2010diameter engineering twist drill extended the preparation 3 and 7\u00a0mm below the facial cemento\u2013enamel junction (<jats:styled-content style=\"fixed-case\">CEJ<\/jats:styled-content>) to simulate <jats:styled-content style=\"fixed-case\">C<\/jats:styled-content>vek's stage 3. These teeth were divided into seven different groups: Group 1: Negative control: intact teeth; Group 2: Positive control: 3\u00a0mm, no restoration; Group 3: Positive control: 7\u00a0mm, no restoration; Group 4: 3\u2010mm composite; Group 5: 3\u2010mm quartz fiber post; Group 6: 7\u2010mm composite; Group 7: 7\u2010mm quartz fiber post. Fracture resistance was performed at 130\u00b0 to the long axis of the tooth with a chisel\u2010shaped tip at the cingulum with a cross\u2010head speed of 5\u00a0mm\u00a0min<jats:sup>\u22121<\/jats:sup>, and the maximum load at which the fracture occurred was recorded.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Group 1 that was the negative control showed the highest fracture resistance. Among the experimental groups, 4 and 5 showed the highest fracture resistance, which were significantly different from groups 6 and 7, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Within the limitations of this <jats:italic>in vitro<\/jats:italic> study, it can be concluded that using either dual\u2010cure composite or a quartz fiber post with composite resin to a depth of 3\u00a0mm would significantly strengthen the roots in immature teeth.<\/jats:p><\/jats:sec>","DOI":"10.1111\/edt.12020","type":"journal-article","created":{"date-parts":[[2012,11,20]],"date-time":"2012-11-20T02:26:07Z","timestamp":1353378367000},"page":"394-398","source":"Crossref","is-referenced-by-count":24,"title":["Fracture resistance of simulated immature maxillary anterior teeth restored with fiber posts and composite to varying depths"],"prefix":"10.1111","volume":"29","author":[{"given":"Brandon","family":"Seto","sequence":"first","affiliation":[{"name":"Department 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