미니스크류 임플란트의 식립 시 치근손상 위험에 대한 정성적 정량적 평가
Qualitative and quantitative evaluation of root injury risk potentially burdening insertion of miniscrew implants
Joanna Antoszewska, Paulina Trze?niewska, Beata Kawala, Bjorn Ludwig, 박효상,
소속 상세정보
( Joanna Antoszewska ) - Wroclaw Medical University Department of Dentofacial Orthopedics
( Paulina Trze?niewska ) - Wroclaw Medical University Department of Dentofacial Orthopedics
( Beata Kawala ) - Wroclaw Medical University Department of Dentofacial Orthopedics
( Bjorn Ludwig ) - University of Homburg/Saar Department of Orthodontics
박효상 ( Park Hyo-Sang ) - 경북대학교 치의학전문대학원 교정학교실
KMID : 0361920110410020112
Abstract
Objective : Microscrew implants (MSIs) offer many advantages, but some complications are known to occur during their insertion. One of the most commonly reported complications is root injury. Our aim was to identify factors associated with root injury and to evaluate their qualitative and quantitative values.
Methods: Thirty-five orthodontists placed MSIs (AbsoAnchorⓡ, Dentos Co. Ltd, Daegu, Korea) in the upper jaw of typodonts, labially between the second premolar and the first molar, in low and high vertical positions. Root contacts were counted, and distances between MSI apices and roots were measured. Fear level of the orthodontists was surveyed before and after the experiment. Wilcoxon’s test, chi-square test, and Mann-Whitney test were used for statistical analysis.
Results: Overall root contact rate of MSI insertion was 23.57%. The root contact rate was significantly higher in MSIs inserted at 90o (45.71%) than at 30o (1.43%). The distance between the dental root and MSI also increased significantly in MSIs inserted at 30o. Mean fear level before MSI insertion (4.6) significantly decreased after insertion (3.2); the causative factors were risk of injury to dental root and maxillary sinus or mandibular canal.
Conclusions : Root injury is relatively rare, and oblique angulation reduces the risk of root and MSI contact.
키워드
Microscrew implants; Anchorage; Root contact; Fear level
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