Abstract:
OBJECTIVES:This study compared the stability of tapered miniscrews with cylindrical miniscrews. MATERIALS/METHODS:One hundred and five tapered and 122 cylindrical self-drilling miniscrews were placed into the maxillary and mandibular buccal alveolar areas of 132 patients (43 males and 89 females). The insertion torque and removal torque were measured and Periotest values (PTVs) were recorded at implantation. RESULTS:The success rates of the tapered and cylindrical miniscrews examined were similar. In the maxilla, the insertion torque of the tapered miniscrews (8.3 Ncm) was significantly higher than that of the cylindrical miniscrews (6.3 Ncm) (P < 0.05). The PTVs of the tapered miniscrews were statistically significantly lower in the maxilla (P < 0.05). The removal torque values showed no significant difference between the tapered and cylindrical miniscrews in the upper and lower buccal areas (P > 0.05). CONCLUSIONS:Tapered miniscrews had higher initial stability when compared to cylindrical miniscrews, whereas the clinical success rates and removal torques were similar between the two designs. The long-term stability is not directly affected by the miniscrew design.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Yoo SH,Park YC,Hwang CJ,Kim JY,Choi EH,Cha JYdoi
10.1093/ejo/cjt092subject
Has Abstractpub_date
2014-10-01 00:00:00pages
557-62issue
5eissn
0141-5387issn
1460-2210pii
cjt092journal_volume
36pub_type
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journal_title:European journal of orthodontics
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journal_title:European journal of orthodontics
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journal_title:European journal of orthodontics
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abstract::The aim of this cross-sectional study was to determine the prevalence of malocclusions, occlusal traits, and their gender distribution in urban Iranian school children. Five hundred and two subjects (253 females and 249 males, aged 11-14 years) were examined. Molar relationship, overjet (OJ), overbite, midline deviati...
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journal_title:European journal of orthodontics
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journal_title:European journal of orthodontics
pub_type: 杂志文章
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journal_title:European journal of orthodontics
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更新日期:2013-10-01 00:00:00
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journal_title:European journal of orthodontics
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更新日期:1991-02-01 00:00:00
abstract::This in vitro study investigated the influence of using different combinations of bracket, adhesive, and light-curing source on the tensile bond strength to porcelain and on failure patterns at debonding. Tensile tests were performed using: one ceramic bracket versus one metal bracket, two orthodontic composites; type...
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journal_title:European journal of orthodontics
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journal_title:European journal of orthodontics
pub_type: 杂志文章
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更新日期:2013-04-01 00:00:00
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