MRCDC (Member of the Royal College of Dentists of Canada), Department of Pediatric Dentistry, Orthodontics and Community Health, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
J Appl Oral Sci. 2010 Jul-Aug;18(4):397-402. doi: 10.1590/s1678-77572010000400013.
It is well known that the efficacy and the efficiency of a Class II malocclusion treatment are aspects closely related to the severity of the dental anteroposterior discrepancy. Even though, sample selection based on cephalometric variables without considering the severity of the occlusal anteroposterior discrepancy is still common in current papers. In some of them, when occlusal parameters are chosen, the severity is often neglected. The purpose of this study is to verify the importance given to the classification of Class II malocclusion, based on the criteria used for sample selection in a great number of papers published in the orthodontic journal with the highest impact factor.
A search was performed in PubMed database for full-text research papers referencing Class II malocclusion in the history of the American Journal of Orthodontics and Dentofacial Orthopedics (AJO-DO).
A total of 359 papers were retrieved, among which only 72 (20.06%) papers described the occlusal severity of the Class II malocclusion sample. In the other 287 (79.94%) papers that did not specify the anteroposterior discrepancy severity, description was considered to be crucial in 159 (55.40%) of them.
Omission in describing the occlusal severity demands a cautious interpretation of 44.29% of the papers retrieved in this study.
众所周知，II 类错[牙合]的疗效和效率与牙齿前后向不调的严重程度密切相关。尽管如此，目前的研究论文中仍普遍基于头影测量变量选择样本，而不考虑咬合前后向不调的严重程度。在其中一些研究中，当选择咬合参数时，往往忽略了严重程度。本研究的目的是验证根据大量发表在具有最高影响因子的正畸杂志上的论文中选择样本时使用的标准，对 II 类错[牙合]分类的重视程度。
在 PubMed 数据库中搜索美国正畸学和口腔颌面正畸学杂志（AJO-DO）历史上有关 II 类错[牙合]的全文研究论文。
共检索到 359 篇论文，其中只有 72 篇（20.06%）论文描述了 II 类错[牙合]样本的咬合严重程度。在另外 287 篇（79.94%）未具体说明前后向不调严重程度的论文中，其中 159 篇（55.40%）认为描述至关重要。
本研究中检索到的 44.29%的论文未描述咬合严重程度，需要谨慎解释。
