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A comparison of tapered and cylindrical miniscrew stability

Authors
 Seong-Hun Yoo  ;  Young-Chel Park  ;  Chung-Ju Hwang  ;  Ji-Young Kim  ;  Eun-Hee Choi  ;  Jung-Yul Cha 
Citation
 European Journal of Orthodontics, Vol.36(5) : 557-562, 2014 
Journal Title
 European Journal of Orthodontics 
ISSN
 0141-5387 
Issue Date
2014
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.
Full Text
http://ejo.oxfordjournals.org/content/36/5/557.long
DOI
10.1093/ejo/cjt092
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
김지영(Kim, Ji Young)
박영철(Park, Young Chel)
차정열(Cha, Jung Yul)
황충주(Hwang, Chung Ju) ORCID logo https://orcid.org/0000-0003-3024-4551
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/100196
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