Third molar angulation and retromolar space after functional orthodontic treatment : Evaluation of panoramic radiographs after monoblock or Herbst appliance.

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Esra Bolat Gümüş, Elçin Esenlik, Göksu Emek Kayafoğlu, Mustafa Yıldırım
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引用次数: 0

Abstract

Purpose: The aim of this respectively cohort study was to evaluate the lower second and third molars and canine angulations, retromolar space and occlusal relationships after functional orthodontic treatments with the monoblock or Herbst appliance using panoramic radiographs.

Methods: Pre- and posttreatment cephalometric and panoramic radiographs of 133 patients (mean age 13.89 ± 1.14 years) treated non-extraction with monoblock (n: 44), Herbst (n: 45) and fixed orthodontic appliances (control group; n: 44) were included to the study. Dental and skeletal measurements were performed on cephalometric radiographs. The angle between the third and second molars, and canines with the lower border of the mandible and the occlusal plane, gonial angle, the angle between the third and second molars and the retromolar space width were assessed on pre- and posttreatment panoramic radiographs. Paired and independent t tests were used for the statistical analysis of the data for intragroup and intergroup comparisons.

Results: Functional treatment with both the monoblock and the Herbst appliances resulted in improvement of skeletal class II relationships. Retromolar space significantly increased in the functional appliance groups compared to the control group (p ≤ 0.001), but improvement of the angulations of posterior teeth was significant only in the monoblock group (p ≤ 0.001).

Conclusion: While both the Herbst and monoblock appliances led to an increase in retromolar space, monoblock treatment resulted in more favorable angulation of the third molars compared to the Herbst treatment.

Abstract Image

功能性正畸治疗后的第三磨牙成角和后磨牙间隙 :单锁或赫氏矫治器矫治后的全景X光片评估。
目的:这项队列研究旨在使用全景X光片评估使用单体或赫氏矫治器进行功能性正畸治疗后的下第二和第三磨牙与犬齿的角度、后槽牙间隙和咬合关系:研究对象包括 133 名患者(平均年龄为 13.89 ± 1.14 岁),分别使用单锁(44 人)、赫伯斯特(45 人)和固定矫治器(对照组,44 人)进行非拔牙治疗,并拍摄了治疗前和治疗后的头影和全景照片。通过头颅X光片对牙齿和骨骼进行测量。在治疗前和治疗后的全景照片上评估了第三和第二磨牙之间的角度、犬齿与下颌骨下缘和咬合面之间的角度、龈角、第三和第二磨牙之间的角度以及后磨牙间隙宽度。组内和组间比较数据的统计分析采用配对检验和独立 t 检验:结果:使用单体矫治器和 Herbst矫治器进行功能性治疗可改善骨骼的II类关系。与对照组相比,功能矫治器组的后槽牙间隙明显增加(p ≤ 0.001),但只有单锁组的后槽牙角度改善明显(p ≤ 0.001):结论:Herbst矫治器和单阻滞矫治器都能增加后磨牙间隙,但与Herbst矫治器相比,单阻滞矫治器能使第三磨牙的角度得到更好的改善。
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来源期刊
CiteScore
3.90
自引率
0.00%
发文量
64
审稿时长
>12 weeks
期刊介绍: The Journal of Orofacial Orthopedics provides orthodontists and dentists who are also actively interested in orthodontics, whether in university clinics or private practice, with highly authoritative and up-to-date information based on experimental and clinical research. The journal is one of the leading publications for the promulgation of the results of original work both in the areas of scientific and clinical orthodontics and related areas. All articles undergo peer review before publication. The German Society of Orthodontics (DGKFO) also publishes in the journal important communications, statements and announcements.
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