Abstract：
:The aim of this study was to evaluate the remaining dentine/cementum thickness using Gates-Glidden burs in serial and crown-down sequences and to observe which of the two sequences is the safest for preparing mesial roots of molars. Thirty-six left and right human mandibular first molars were selected. Standard access cavities were made and initially explored with Flexofiles sizes 10 and 15 until the tip was visible at the apex. The teeth were embedded in a muffle specially developed for this study using a PVC tube with two parallel metal rods in its lid. Each tooth-block was sectioned 3 mm apically to the furcation using a low-speed saw with a diamond disc. The tooth-block was examined under a microscope and an initial image was captured by a digital video system with 8 X and 12 X magnifications. Finally, the tooth-blocks were reassembled in the muffle so that the canals could be instrumented. After instrumentation the area of each mesial canal as well as the smallest distance to the root furcation were measured again. The mesio-buccal canals (crown-down order) and the mesio-lingual canals (serial sequence) presented an average area of 0.46 +/- 0.16 mm(2) and 0.88 +/- 0.27 mm(2) (P < 0.01), respectively. The mean values of the smallest distance to the furcation for the mesio-buccal and mesio-lingual canals were 0.66 +/- 0.19 mm and 0.39 +/- 0.13 mm (P < 0.01), respectively. The remaining dentine/cementum thickness using Gates-Glidden burs was greater in the crown-down sequence than in the serial sequence.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Coutinho-Filho T,De-Deus G,Gurgel-Filho ED,Rocha-Lima AC,Dias KR,Barbosa CAdoi
10.1590/s1806-83242008000100004subject
Has Abstractpub_date
2008-01-01 00:00:00pages
18-24issue
1eissn
1806-8324issn
1807-3107pii
S1806-83242008000100004journal_volume
22pub_type
杂志文章abstract：:This randomized clinical trial aimed to assess the efficacy of sealing occlusal carious lesions in permanent teeth. The sample consisted of 54 occlusal carious lesions in permanent molars and premolars of 49 patients aged 8-43 years (median: 19 years). The inclusion criteria comprised the presence of a cavity with no ...
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abstract：:[This corrects the article doi: 10.1590/1807-3107BOR-2017.vol31.0105]. ...
journal_title：Brazilian oral research
pub_type： 杂志文章,已发布勘误
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