Abstract：
:This study compared apical transportation produced in curved (45- to 60-degree) molar canals instrumented with two MM-3000 Sonic Air test files (Rispi-Sonic and Trio-Sonic) with apical transportation from instrumentation with conventional K-type files. Seventy-five extracted human permanent mandibular molars were equally divided into three groups. Results showed that 92 (61%) of 150 measurements demonstrated no transportation, and only 7 (5%) had transportation between 0.25 and 0.5 mm. Most of the transportation was 0.25 mm or less, and no file produced transportation greater than 0.5 mm in a buccolingual or mesiodistal direction. Statistical analysis (chi-square test and analysis of variance) showed no significant difference (p greater than 0.05) in the amount of apical transportation in canals prepared with the Kerr K-type, Rispi-Sonic, or Trio-Sonic files.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Ehrlich AD,Boyer TJ,Hicks ML,Pelleu GB Jrdoi
10.1016/s0099-2399(89)80235-3subject
Has Abstractpub_date
1989-05-01 00:00:00pages
200-3issue
5eissn
0099-2399issn
1878-3554pii
S0099-2399(89)80235-3journal_volume
15pub_type
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pub_type： 杂志文章,随机对照试验
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更新日期：2018-05-01 00:00:00
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journal_title：Journal of endodontics
pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：2005-01-01 00:00:00
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