Bone condition of the maxillary zygomatic process prior to orthodontic anchorage plate fixation

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• 作者：Dr. Dr. T.M. Pr?ger ; H.G. Brochhagen…
• 关键词：Computed tomography ; Maxilla ; Cortical anchorage ; Miniplates ; Radiation ; Computertomographie ; Maxilla ; Kortikale Verankerung ; Verankerungsplatten ; Bestrahlung
• 刊名：Journal of Orofacial Orthopedics / Fortschritte der Kieferorthop?die
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：76
• 期：1
• 页码：3-13
• 全文大小：790 KB
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• 刊物主题：Dentistry; Oral and Maxillofacial Surgery;
• 出版者：Springer Berlin Heidelberg
• ISSN：1615-6714

文摘

Objectives The clinical success of orthodontic miniplates depends on the stability of the miniscrews used for fixation. For good stability, it is essential that the application site provides enough bone of good quality. This study was performed to analyze the amount of bone available for orthodontic miniplates in the zygomatic process of the maxilla. Methods We examined 51?dental CT scans (Somatom Plus?4; Siemens, Erlangen, Germany) obtained from 51?fully dentate adult patients (mean age 24.0?±-.1?years; 27?male and 24?female) prior to third molar surgery. The amount of bone in the zygomatic process region at the level of the first molar root tips and at several other cranial levels as far as 15?mm from the root tips was measured Results Bone thickness at the root tip level averaged 4.1?±-.0?mm; the lowest value measured at this level in any of the patients was 2.7?mm. Bone thickness averaged 8.3?±-.0?mm at 15?mm cranial to the root tips; 6.9?mm was the lowest value. Conclusion The zygomatic process appears to provide sufficient bone to accommodate screws for miniplate fixation. While some patients may possess a borderline amount of bone at more caudal levels, lack of volume is not a problem near the zygomatic bone.