Assessment of clinical validity of KPG index for 3D classification of impacted maxillary canines by cone beam computed tomography in patients

IF 2.4 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Orthodontics & Craniofacial Research Pub Date : 2024-04-05 DOI:10.1111/ocr.12788

A. A. Bajjad, M. S. Ahemad, S. Gupta, F. Mehjabeen, S. Guin, S. Mehra, R. Rajesh

{"title":"Assessment of clinical validity of KPG index for 3D classification of impacted maxillary canines by cone beam computed tomography in patients","authors":"A. A. Bajjad, M. S. Ahemad, S. Gupta, F. Mehjabeen, S. Guin, S. Mehra, R. Rajesh","doi":"10.1111/ocr.12788","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Objectives</h3>\n \n <p>The primary objective of this study was to assess the validity of the KPG index in predicting the difficulty of treatment involving impacted maxillary canines. The secondary objective was to assess the reliability and reproducibility of the index.</p>\n </section>\n \n <section>\n \n <h3> Materials and Methods</h3>\n \n <p>A retrospective study was conducted on 96 maxillary impacted canines (MIC) in 60 patients aged 13–35 years. Cone-beam computed tomography (CBCT) scans were used to predict the treatment difficulty of MIC using the KPG index. Patient case files were assessed for the actual difficulty encountered in treating MIC. Cohen's kappa correlation coefficient was used for intra-observer reliability and Kendell's <i>W</i> test was used for inter-observer reliability. Spearman's correlation coefficient test was used to assess the correlation between predicted and actual treatment.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Easy and moderately difficult cases exhibited a moderate correlation between actual and predicted treatment outcomes, whereas difficult cases displayed a weak correlation. The perfect correlation was observed exclusively in extremely difficult cases. The intra-observer reliability for assessing CBCT scans using the KPG guide was found to be 0.88, and the inter-rater reliability was 0.94.</p>\n </section>\n \n <section>\n \n <h3> Conclusion</h3>\n \n <p>The KPG index displayed 87%, 71%, 50% and 100% validity in easy, moderately difficult, difficult, and extremely difficult cases, respectively. This index showed good reliability and reproducibility. However, it is imperative to consider a multitude of other factors, including the patient's age, presence of associated root resorption in adjacent teeth, and duration of treatment, to make an informed decision between surgical exposure and extraction.</p>\n </section>\n </div>","PeriodicalId":19652,"journal":{"name":"Orthodontics & Craniofacial Research","volume":"27 S2","pages":"48-55"},"PeriodicalIF":2.4000,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Orthodontics & Craniofacial Research","FirstCategoryId":"3","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ocr.12788","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}

引用次数: 0

Abstract

Objectives

The primary objective of this study was to assess the validity of the KPG index in predicting the difficulty of treatment involving impacted maxillary canines. The secondary objective was to assess the reliability and reproducibility of the index.

Materials and Methods

A retrospective study was conducted on 96 maxillary impacted canines (MIC) in 60 patients aged 13–35 years. Cone-beam computed tomography (CBCT) scans were used to predict the treatment difficulty of MIC using the KPG index. Patient case files were assessed for the actual difficulty encountered in treating MIC. Cohen's kappa correlation coefficient was used for intra-observer reliability and Kendell's W test was used for inter-observer reliability. Spearman's correlation coefficient test was used to assess the correlation between predicted and actual treatment.

Results

Easy and moderately difficult cases exhibited a moderate correlation between actual and predicted treatment outcomes, whereas difficult cases displayed a weak correlation. The perfect correlation was observed exclusively in extremely difficult cases. The intra-observer reliability for assessing CBCT scans using the KPG guide was found to be 0.88, and the inter-rater reliability was 0.94.

Conclusion

The KPG index displayed 87%, 71%, 50% and 100% validity in easy, moderately difficult, difficult, and extremely difficult cases, respectively. This index showed good reliability and reproducibility. However, it is imperative to consider a multitude of other factors, including the patient's age, presence of associated root resorption in adjacent teeth, and duration of treatment, to make an informed decision between surgical exposure and extraction.

查看原文本刊更多论文

通过锥形束计算机断层扫描评估 KPG 指数对患者上颌阻生犬齿进行三维分类的临床有效性

本研究的主要目的是评估 KPG 指数在预测上颌阻生牙治疗难度方面的有效性。材料和方法对 60 名年龄在 13-35 岁之间的患者中的 96 个上颌撞击性犬齿 (MIC) 进行了回顾性研究。采用锥形束计算机断层扫描（CBCT）扫描，利用 KPG 指数预测 MIC 的治疗难度。对患者病例档案进行了评估，以了解治疗 MIC 时遇到的实际困难。科恩卡帕相关系数（Cohen's kappa correlation coefficient）用于衡量观察者内部的可靠性，肯德尔W检验（Kendell's W test）用于衡量观察者之间的可靠性。结果轻度和中度困难病例的实际治疗结果与预测治疗结果之间呈中度相关，而困难病例则呈弱相关。只有在极度困难的病例中才能观察到完美的相关性。使用 KPG 指南评估 CBCT 扫描的观察者内部信度为 0.88，观察者之间的信度为 0.94。结论 KPG 指数在简单、中度困难、困难和极度困难病例中的有效率分别为 87%、71%、50% 和 100%。该指数显示出良好的可靠性和可重复性。然而，必须考虑其他多种因素，包括患者的年龄、邻牙是否存在相关的牙根吸收以及治疗的持续时间，才能在手术暴露和拔牙之间做出明智的决定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Orthodontics & Craniofacial Research 医学-牙科与口腔外科

CiteScore

5.30

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions. The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements. The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.