BOS MOrth Cases Prize 2004

Abstract

This paper describes the clinical orthodontic treatment of 2 cases that were successfully entered for the 2004 American Orthodontics MOrth Cases Prize. The first case is that of a patient presenting with a Class III malocclusion treated with rapid maxillary expansion and protraction headgear followed by fixed appliance therapy. The second case demonstrates the use of fixed appliances to correct a moderate Class II division I malocclusion.     

The William Houston Medal of the MOrth of the Royal College of Surgeons of Edinburgh 2003 and the BOS MOrth Cases Prize 2003

Abstract

This paper describes the orthodontic treatment of 2 cases that were presented by the winner of the William Houston Medal of the MOrth of the Royal College of Surgeons of Edinburgh at the June 2003 diet of the examination. The cases were also successful presented for the British Orthodontic Society MOrth Cases Prize 2003.     

The British Orthodontic Society MOrth cases prize 2014

This paper describes the orthodontic treatment of two cases that were successful in winning the British Orthodontic Society (BOS) Membership in Orthodonitcs (MOrth) cases prize in 2014. The first case describes the management of a 26-year-old female with a Class II division 2 incisor relationship on a Class III skeletal base with reduced vertical proportions. This was complicated by: an unerupted ectopic palatally displaced upper right permanent canine, an erupted palatally displaced upper left permanent canine, retained deciduous canines, generalised microdontia, an overall Bolton tooth size discrepancy, mild crowding in the upper arch, an increased overbite (complete to tooth tissue) and crossbites. Treatment involved a surgical exposure of the ectopic canine and the use of fixed pre-adjusted edgewise appliances over a period of 24 months. The second case describes the management of a 12-year-old female with a Class II division 2 incisor relationship on a Class 2 skeletal base with reduced vertical proportions. This was complicated by: an increased overjet and overbite (complete to soft tissue), mild upper and lower arch crowding and an increased naso-labial angle. Treatment involved an initial phase of modified Clark Twin Block and sectional fixed appliances followed by complete fixed pre-adjusted edgewise appliances over a period of 24 months.     

The BOS MOrth Cases Prize 2009

Abstract

This paper describes the orthodontic treatment of two cases that were successfully entered for the 2009 MOrth Cases Prize. The first case describes the treatment of a class II division 1 malocclusion with increased vertical proportions that was treated with upper and lower self-ligating appliances and headgear for anchorage support. The second case describes the use of a Clark Twin-Block appliance, with headgear, followed by non-extraction upper and lower fixed appliances to treat a class II division 1 malocclusion with an overjet of 14 mm.     

The American Orthodontics BOS MOrth Cases Prize 2005

Abstract

This paper describes the orthodontic treatment of two cases that were successfully entered for the 2005 American Orthodontics MOrth Cases Prize. The first case is that of a patient presenting with a Class II division 2 malocclusion treated with upper and lower fixed appliances plus headgear. The second case demonstrates the use of a twin-block appliance, followed by fixed appliances to correct a moderate Class II division 1 malocclusion.     

直丝弓带环在方丝弓矫正技术中的临床应用

目的观察在方丝弓矫正技术中应用直丝弓带环的临床治疗效果。方法选择2组各18例患者分别使用直丝弓带环和方丝弓带环,均使用方丝弓托槽进行临床矫正。在矫治第2期末即精细调整前和固定矫治结束时测量第一磨牙中央窝与前磨牙颊尖延长线的距离并进行比较。结果矫治第2期末时方丝弓带环组测量值大于直丝弓带环组,磨牙偏于舌腭侧;固定矫治结束时两组差异无显著性。结论在方丝弓矫正技术中将带环替换为直丝弓带环,可以改善磨牙颊舌向位置增加磨牙支抗,关闭间隙时弓丝滑动更加容易。     

Forsus和Dynamax矫治器对下颌骨生长改形的效果比较

目的比较Forsus矫治器与Dynamax矫治器对下颌骨形态的影响。方法选择30例治疗成功的骨性Ⅱ类错[牙合]患者,15例采用Forsus矫治器治疗,15例采用Dynamax矫治器治疗,以矫治前后的X线头影测量片评价其疗效,并进行对比。结果两种矫治器均能明显增加下颌骨长度,但Dynamax矫治器对下颌平面角的影响更大。结论在选择两种矫治器矫治骨性Ⅱ类错[牙合]患者时应考虑患者的下颌角因素。     

Dynamax矫治器早期矫治安氏Ⅱ类1分类错的软硬组织改变

目的:探讨Dynamax矫治器治疗早期安氏II类1分类错(牙合)患者的疗效.方法: 应用Dynamax矫治器对15 例Hagg手腕骨片为 FG-G 期的安氏II类1分类下颌后缩患者进行治疗,拍摄治疗前后的头颅侧位片,并应用Winceph 7.0头影测量软件进行测量和分析.结果: Dynamax矫治器治疗后,SNB角、下颌骨综合长度、下切牙唇倾度、鼻唇角增大;ANB角、Wits值、上前牙唇倾度、前牙覆盖、覆(牙合)、面凸角、ANB减小,以上变化均有统计学意义(P<0.05).结论: Dynamax功能矫治器促进下颌发育能有效的改善面部美观,使软硬组织侧貌面型趋于正常.     

The John Kay Williams Gold Medal of the Royal College of Surgeons of England and Glasgow 2015

This paper describes the clinical treatment of two cases presented by the recipient of the 2015 Bi-collegiate Membership in Orthodontics John Kay Williams Gold Medal of the Royal College of Surgeons of England and Glasgow. The first case describes the management of an 11-year-old male with a class II Division 1 malocclusion with a 9?mm overjet complicated by an upper anterior odontome and moderate upper arch crowding. The second case describes a 14-year-old female with a class III malocclusion with a reverse overjet complicated by moderate lower arch crowding and previously removed upper permanent canines.     

方丝弓矫治器用于再植牙固定的临床疗效

目的：探讨方丝弓固定矫治器用于再植牙的临床疗效是否优于传统的再植术。方法：利用方丝弓固定正畸术的矫治原理和矫治方法，应用于脱落牙的再植。结果：经临床疗效分析，证实方丝弓矫治器对脱落牙的再植固定成功率与软组织的医源性损伤程度均优于传统的再植方法。结论：使用方丝弓固定矫治器于脱牙再植中疗效优于传统再植术。     

上颌牙列及方丝弓矫治器三维有限元模型的建立及验证

目的快速建立高精度的上颌方丝弓矫治器的三维有限元分析模型并进行验证。方法通过多层螺旋CT扫描,获得上、下颌骨及牙列的数据,采用Mimics、Catia及ABAQUS软件相结合的方法,建立包括上颌牙列、牙周膜、牙槽骨、方丝弓矫治器的三维有限元模型,并观察计算机模拟矫治力作用下上颌中切牙应力分布。采用激光散斑剪切实验力学的方法进行验证。结果建立了包含方丝弓矫治器的上颌牙列的三维有限元模型,计算机模拟作用下的应力分布情况与激光散斑剪切试验结果相近,模型的精确性得到了初步有效的验证。结论所建立的三维有限元模型仿真性好,方法便捷有效,为采用有限元法进行正畸生物力学分析的深入研究打下基础。同时可为临床矫治提供一定的指导意义。     

The Dynamax System: A new orthopaedic appliance and case report

Abstract

The Dynamax appliance is a treatment modality for the correction of the Skeletal II malocclusion characterized by a mandibular retrusion. Progressive mandibular advancement, maxillary expansion, control of maxillary growth, incisor torque and control of vertical facial development are incorporated into a two-part appliance. The design facilitates laboratory construction, clinical handling and patient acceptability.

A prefabricated spring module forms the basis of the appliance, allowing both maxillary expansion and mandibular advancement. An easily adjustable progressive forward position of the lower jaw makes a construction bite unnecessary.

The spring module provides most of the structure of the appliance so that minimal acrylic is required and the appliance is fully contained within the freeway space. Contact between the upper and lower parts of the appliance occurs posteriorly in the lingual sulcus. Here the depth permits an extended vertical contact, to maintain a protrusive mandibular position throughout the range of mandibular opening, including during sleep. The lower portion of the appliance may be fixed or removable and multibracket treatment can be carried out in one or both arches at the same time as the orthopaedics.     

���Ϣ�������ϻ��εĽ���

安氏Ⅱ类错(牙合)是指习惯性咬合时上、下第一磨牙或上、下颌骨在矢状方向上的不词,且常伴有垂直方向发育不调.     

Treatment outcomes of Class II malocclusion cases treated with miniscrew-anchored Forsus Fatigue Resistant Device: A randomized controlled trial

Objective:To evaluate the skeletal, dental, and soft tissue effects of the Forsus Fatigue Resistant Device (FRD) used with miniscrew anchorage and compare them with those of the conventional Forsus FRD.Materials and Methods:This study was carried out on 38 patients. These patients were randomly allocated into three groups. The 14 patients in group 1 (aged 12.76 ± 1.0 years) were treated with the FRD appliance. In group 2, the 15 patients (aged 12.52 ± 1.12 years) received treatment with FRD using miniscrew anchorage, and the 9 patients in group 3 (aged 12.82 ± 0.9 years) received no treatment as a control group. Linear and angular measurements were made on lateral cephalograms before and immediately after Forsus treatment. Data were analyzed statistically using paired t-, ANOVA, and Tukey tests.Results:Class I molar relationship and overjet correction were achieved in both treatment groups. Although mandibular growth was statistically nonsignificant, there was a significant headgear effect on the maxilla. Mandibular incisor proclination, maxillary incisor retroclination, and distalization of maxillary molars were significant in both treatment groups. However, no significant differences were found between the treatment groups.Conclusions:Class II correction was mainly dentoalveolar in both treatment groups. Use of miniscrews with Forsus did not enhance mandibular forward growth nor prevent labial tipping of the mandibular incisors.     

A preliminary report of a new design of cast metal fixed twin-block appliance

Abstract

The present paper describes a cast metal fixed twin-block appliance utilized to correct a Class II malocclusion, which is designed for full-time wear. The object of the present paper is to achieve rapid functional correction of Class II malocclusions by transmitting favourable occlusal forces to inclined planes which are cemented to the posterior teeth. In the meantime, pre-adjusted fixed edgewise appliances can be placed on the anterior teeth to correct their malpositions. This new functional appliance design may shorten the total treatment duration and reduce the need for patient compliance.     

替牙期前牙反(牙合)早期固定矫治与功能性矫治对比研究

目的:探讨固定矫治器和功能矫治器矫治替牙期前牙反牙合的作用机理、矫治效果和适用范围。方法:41例替牙期前牙反牙合病例,其中21例使用2×4固定矫治技术治疗,20例使用功能矫治器治疗。对两组病例治疗前后X线头影测量指标进行分析。结果:固定矫治组可以通过牙槽骨改变解除前牙反牙合;功能矫治器组除牙性改变外还有骨骼改变。结论:早期固定矫治器配合Ⅲ类颌间牵引可以有效矫治替牙期牙性、功能性前牙反牙合,功能矫治器适用骨性或混合性反牙合病例。     

MEAW技术用于矫治末期精细调整14例报告

目的：总结MEAW技术在错He畸形矫治末期进行精细调整中的应用效果。方法：临床矫治14例，年龄14-26岁，平均17．8岁，18岁以上6例。经标准方丝弓技术矫治后遗留局部小开He，上下颌牙齿尖窝交错关系未建立等缺陷，采用MEAW技术加颌间弹力牵引进行咬合关系的精细调整。结果：经过MEAW技术3-6个月的精细调整，全部病例均达到预期矫治效果，建立了正常的覆He覆盖关系，建立良好的咬合关系，达到了He的稳定状态。结论：对矫治末期出现的缺陷，通过MEAW技术加各种不同方向和力值的颌间弹力牵引，进行牙列的精细调整，可建立完善的牙齿尖窝对应关系，提高矫治效果。     

The William Houston Gold Medal of the Royal College of Surgeons of Edinburgh 2014, orthodontic cases

Abstract

The William Houston Medal is awarded to the individual achieving the highest mark at, the Membership in Orthodontics (MOrth) examination at the Royal College of Surgeons of Edinburgh. As part of the examination the candidate must submit five clinical cases. Details of two cases treated by the winning candidate are presented in this paper.