A temporary filling material used for coronal sealing during endodontic treatment may cause tooth fractures in large Class II cavities in vitro. (22nd May 2014)

• Record Type: Journal Article
• Authors: Tennert, C.; Eismann, M.; Goetz, F.; Woelber, J. P.; Hellwig, E.; Polydorou, O.
• Is Part Of: International endontic journal. Volume 48:Number 1(2015:Jan.)
• Page Start: 84
• Page End: 88
• Publication Date: 2014-05-22
• Subjects: Endodontics -- Periodicals; 617.6342
• DOI: 10.1111/iej.12280
• Languages: English
• ISSNs: 0143-2885

Abstract

<abstract abstract-type="main" id="iej12280-abs-0001"> <title>Abstract</title> <sec id="iej12280-sec-0001" sec-type="section"> <title>Aim</title> <p>To investigate the use of a zinc oxide/zinc sulphate‐based cement (Coltosol<sup>®</sup> F, Coltène Whaledent, Cuyahoga Falls, OH, USA) as a temporary filling material during multiple‐visit root canal treatments and the occurrence of cracks within the filling material or the tooth.</p> </sec> <sec id="iej12280-sec-0002" sec-type="section"> <title>Methodology</title> <p>Root canals of one hundred and twenty‐two extracted human molars were prepared using ProTaper instruments up to size F2. After root canal preparation, standardized mesial‐occlusal‐distal cavities were prepared. The buccal‐lingual/palatal width of the cavities was 4.5 mm), so that the remaining cavity walls had a mean thickness of 3.5 mm. Teeth were checked for cracks and fracture lines using a stereomicroscope with 10× magnification. A calcium hydroxide slurry was used as an intracanal dressing. The teeth were divided into three groups. In the Coltosol group, the cavity was filled with Coltosol<sup>®</sup> F. In the Coltosol‐Clearfil group, a 2‐mm layer of Coltosol<sup>®</sup> F was placed into the coronal pulp chamber, the remaining cavity was filled with Clearfil<sup>™</sup>. In the Clearfil group, a foam pellet was placed onto the orifices of the root canals, the remaining cavity was filled with Clearfil<sup>™</sup>. In the control group, the cavities were left without any filling material. The teeth were stored in water at 37 °C for 14 days and examined every 24 h under a stereomicroscope for fracture lines occurring on the tooth surface or in the filling material.</p> </sec> <sec id="iej12280-sec-0003" sec-type="section"> <title>Results</title> <p>In the Coltosol group, fractures within the filling material were observed in 28 (85%) of 33 teeth. 13 (39%) teeth had tooth fractures. Amongst these teeth, 8 (61%) had root fractures, 1 (8%) had a crown fracture and 4 (31%) had a root‐crown fracture.</p> </sec> <sec id="iej12280-sec-0004" sec-type="section"> <title>Conclusion</title> <p>Coltosol<sup>®</sup> F, when used alone as a restorative material, led to tooth fractures in Class II cavities in teeth undergoing root canal treatment. Tooth fractures may occur 4 days after placement of the filling.</p> </sec> </abstract>