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Long-term Skeletal Stability of Mandibular Surgery with Bilateral Sagittal Split Ramus Osteotomy—Advancement Versus Setback: A Systematic Review and Meta-analysis 下颌双侧矢状裂支截骨手术的长期骨骼稳定性-前进与后退:系统回顾和荟萃分析
Pub Date : 2023-10-23 DOI: 10.1177/03015742231203469
Dhruv Jain, Sanjeev Datana, Sukhbir Singh Chopra
Objectives The aim of this study was to evaluate and compare the long-term skeletal stability of mandibular advancement and mandibular setback achieved with bilateral sagittal split ramus osteotomy (BSSRO) procedure in adult patients with a minimum follow-up of at least 1 year. Methods A literature search was systematically performed according to PRISMA guidelines from four databases without limitation till 15 June 2021. Available literature was assessed for long-term skeletal stability as horizontal/vertical changes at cephalometric point B following conventional mandibular surgery (BSSRO) with rigid internal fixation. The quality of selected articles was assessed using Newcastle–Ottawa scale and the meta-analysis was carried out with Q statistic method, I-squared statistics, and fixed-effect model to estimate the pooled mean and Begg–Mazumdar bias indicator. Results A total of five studies (three pertaining to mandibular advancement and two setback groups) were included for comparative evaluation of relapse. The mean horizontal relapse was 7.85% pertaining to mandibular advancement (4.2–7.06 mm) as compared to 27% pertaining to mandibular setback (7.18–10.26 mm). The meta-analysis of four included studies (two in each group) revealed significant differences in long-term skeletal stability of mandibular advancement and setback (pooled proportion = 20.10; 95% confidence interval = 2.48–39.57). Conclusion Mandibular setback can be expected to relapse by 21.7–32.3% (mean 27%) as compared to mandibular advancement accounting for a relapse of 2.1–15.4% (mean 7.85%) in adult patients. Hence, mandibular advancement is a relatively stable procedure in the long term. PROSPERO registration number: CRD42021261466
目的:本研究的目的是评估和比较双侧矢状分叉支截骨术(BSSRO)对成年患者下颌前进和下颌后退的长期骨骼稳定性,随访时间至少1年。方法根据PRISMA指南系统检索4个数据库的文献,检索截止日期为2021年6月15日。现有文献评估了常规下颌手术(BSSRO)刚性内固定后头颅测量点B的水平/垂直变化的长期骨骼稳定性。采用Newcastle-Ottawa量表评价入选文献的质量,采用Q统计方法、i平方统计方法和固定效应模型进行meta分析,估计汇总平均值和Begg-Mazumdar偏倚指标。结果共纳入5项研究(3项与下颌前进组有关,2项与下颌后退组有关),对复发进行比较评估。下颌骨前进(4.2-7.06 mm)的平均水平复发率为7.85%,而下颌骨后退(7.18-10.26 mm)的平均水平复发率为27%。四项纳入的研究(每组两项)的荟萃分析显示,下颌前进和后退的长期骨骼稳定性存在显著差异(合并比例= 20.10;95%置信区间= 2.48-39.57)。结论在成人患者中,下颌骨后退的复发率为21.7-32.3%(平均27%),而下颌骨前进的复发率为2.1-15.4%(平均7.85%)。因此,下颌骨前移长期来看是一个相对稳定的过程。普洛斯彼罗注册号:CRD42021261466
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引用次数: 0
EZC Guidance for Bone Screws: A Chairside Solution EZC指南骨螺钉:椅子边的解决方案
Pub Date : 2023-10-18 DOI: 10.1177/03015742231201713
Alisha Lalani, Shailesh Shenava, Robin Mathew, Sandeep Singh
Orthodontists, on a day-to-day basis, have started to use bone screws for various tooth movements such as distalization, retraction, intrusion, etc. The most common sites for the placement of bone screws are IZC6 and IZC7 with an angulation of 55° to 70°. Their added advantage is an extra-radicular site with rare chances of failure. Failure of these IZC screws may take place due to improper placement or improper angulation, which may lead to inaccurate ideal final angulation, leading to trauma to the buccal mucosa, and inter radicular placement of the IZC screw. Asymmetrically placed IZC screws on the left and right side of the mouth can lead to alteration of biomechanics. A clinician usually finds it challenging to find a purchase point of the cancellous bone and to place it at the correct angulation, which needs to be achieved for the success of the bone screw. Herein, fabrication of a guide for the accurate placement of the IZC screws, using the basic armamentarium available in a clinic, is demonstrated. The method is economical, quick, non-tedious, and accurate.
正畸医生在日常生活中,已经开始使用骨螺钉来进行各种牙齿运动,如远端、内缩、侵入等。最常见的骨螺钉放置位置是IZC6和IZC7,角度为55°至70°。它们的额外优势是在根外部位,很少有失败的机会。这些IZC螺钉可能由于放置不当或成角不当而失效,这可能导致理想的最终成角不准确,导致口腔黏膜损伤,以及IZC螺钉在根间放置。在口腔左右两侧不对称放置IZC螺钉会导致生物力学的改变。临床医生通常发现找到松质骨的购买点并将其放置在正确的角度是一项挑战,这需要达到螺钉的成功。在这里,制作一个精确放置IZC螺钉的指南,使用基本设备在诊所可用,是演示。该方法经济、快速、简便、准确。
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引用次数: 0
Rotation e-Cleat 旋转e-Cleat
Pub Date : 2023-10-18 DOI: 10.1177/03015742231198640
Amit Prakash, Chandni Bharti, Pravin Kumar Maroore
The article describes an innovative and unconventional approach to correct rotations with the aid of self-made rotation e-cleat utilizing the unused elastic module carrier piece freely available in our clinics.
本文介绍了一种创新和非常规的方法,利用我们诊所免费提供的未使用的弹性模块载体片,借助自制的旋转电子清除器来纠正旋转。
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引用次数: 0
Incline Correct: A Novel Device for Accurate Inclination of Twin Block Appliances 倾斜校正:一种双块器具精确倾斜的新装置
Pub Date : 2023-10-18 DOI: 10.1177/03015742231195307
Abhiram Cherukuri, Shreya Naik
Retrognathic mandible is the most common feature in growing children with skeletal Class II malocclusion. This does not self-correct with growth. Functional appliances are known to exert beneficial effects to improve this skeletal pattern. Among several removable functional appliances, Twin Block is the most preferred. Twin Blocks are designed for full-time wear such that maximum benefit from functional forces can be obtained. The maxillary and mandibular bite blocks occlude at a 70° angle on complete closure. It is important to angulate the inclines at exactly 70°, as an increase in this angulation will require a conscious effort from the patient. Incline Correct is designed to accurately measure and construct inclines at 70° to the occlusal plane.
下颌后突是成长儿童骨骼II类错颌最常见的特征。这不会随着经济增长而自我纠正。已知功能性器具对改善这种骨骼形态有有益作用。在几种可移动的功能电器中,Twin Block是最受欢迎的。双块是专为全职穿着,这样的最大效益,从功能力量可以获得。上颌和下颌咬合块在完全闭合时以70°角咬合。重要的是将倾斜度精确地调整为70°,因为增加这个角度需要患者有意识的努力。倾斜校正设计用于精确测量和构建与咬合平面70°的倾斜。
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引用次数: 0
Yen Implant Map: A Novel Method to Record Orthodontic Temporary Anchorage Device Site Yen种植体地图:一种记录正畸临时支抗装置位置的新方法
Pub Date : 2023-10-09 DOI: 10.1177/03015742231201492
Shafees Koya, Ahzana Abda, Vivek Amin, Sandeep Shetty
Documentation of patient records helps to evaluate, plan, and monitor the treatment progress. It should be recorded timely and legibly. Recently, TADs are being used commonly in our orthodontic practice, but the precise description of the site requires lengthy cumbersome statements. Here, we describe an easy method to describe the TAD site, thus improving the efficiency of documentation.
病历记录有助于评估、计划和监测治疗进展。应及时、清晰地记录。最近,TADs在我们的正畸实践中被广泛使用,但准确描述该部位需要冗长而繁琐的陈述。在这里,我们描述了一种简单的方法来描述TAD站点,从而提高了文档的效率。
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引用次数: 0
Stresses Along the Root Surfaces of Maxillary Anterior Dentition During Retraction in Labial and Lingual Mechanics with Varying Level of Bone Support: A Finite Element Study 在不同程度的骨支持下,上颌前牙列牵缩时沿根面应力的唇舌力学:一项有限元研究
Pub Date : 2023-10-06 DOI: 10.1177/03015742231199316
Rahul Roy, Smruti Bhusan Nanda, Sumita Mishra, Rururaj Pradhan, Virag Bhatia
Objective The aim of this study was to evaluate and compare the stress along the root surfaces of anterior maxillary dentition during retraction in labial and lingual mechanics with varying level of bone support. Materials and methods Eight 3D finite element models (FEM) having 340,215 nodes and 211,543 elements were created with normal periodontium and different levels of alveolar bone loss; four with labial brackets and four with lingual brackets. Sliding mechanics were simulated as en masse retraction of the anterior dentition. The equivalent stresses along the roots of six anterior maxillary teeth were measured in all the models. Results Equivalent stresses in pascals (Pa) generated at the root surfaces of central incisors are always higher in labial technique (right: 4.6013 × 10 -2 ; left: 7.1158 × 10 -2 ) and of canines (right: 10.003 × 10 -2 ; left: 16.789 × 10 -2 ) are always higher in lingual technique. Conclusion In labial technique, central incisor roots are experiencing maximum stress, which might be the explanation of commonly seen higher incidence of root resorption in them during en masse retraction. In lingual technique, canine roots are experiencing higher stresses as compared to other anterior teeth during en masse retraction. Equivalent stresses generated at the root surfaces of canines are more irrespective of the alveolar bone loss in lingual technique.
目的评价和比较不同骨支撑水平下上颌前牙列牵缩时沿根面受力情况。材料与方法以正常牙周组织和不同程度牙槽骨缺失为研究对象,建立8个三维有限元模型,共340215个节点,211543个单元;四个有唇托四个有舌托。模拟前牙列整体内缩时的滑动力学。所有模型均测量了6颗上颌前牙沿牙根方向的等效应力。结果中切牙根面产生的等效帕斯卡应力(Pa)在唇部技术中较高(右:4.6013 × 10 -2;左:7.1158 × 10 -2)和犬科动物(右:10.003 × 10 -2;左:16.789 × 10 -2)在语言技巧上总是较高的。结论在唇部技术中,中切牙牙根承受的应力最大,这可能解释了中切牙牙根吸收发生率较高的原因。在舌技术中,与其他前牙相比,犬根在大规模后缩过程中承受着更高的压力。在舌技术中,牙根表面产生的等效应力与牙槽骨丢失无关。
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引用次数: 0
Assessment of Lower Third Molar Eruption Status in Different Facial Growth Patterns in Adults 成人不同面部生长方式下第三磨牙萌出状况的评估
Pub Date : 2023-10-02 DOI: 10.1177/03015742231199844
Kiranjeet Kaur, Ajit Jaiswal, None Shivani, Jaskaran Singh
Introduction Various skeletal and dental factors help in predicting the mandibular third molar eruption, but the reliability of these factors may vary within subjects with different growth patterns. Thus, the present study aims to analyze these parameters for the lower third molar eruption in subjects with different facial growth patterns. Material and Methods The study was conducted on 120 pre-treatment lateral cephalograms and orthopantomograms of the subjects who were equally divided (based on the SN-GoGn angle) into three groups: normodivergent, hypodivergent, and hyperdivergent. The groups were further subdivided into impacted and erupted subgroups based on mandibular third molar eruption status. Nine radiographic parameters were compared between the impacted and erupted subgroups, using the independent Student’s t-test, to check their association with mandibular third molar eruption in different growth patterns. Results Beta angle was significantly different in the erupted and impacted subgroups in all three groups (with p <.05). The retromolar space and alpha angle was significant in hypodivergent group (p <.01) and the gamma angle was significant in the hyperdivergent group (p <.01). Conclusion Among all the parameters that were analyzed for the third molar eruption, only the beta angle was significantly related to the third molar eruption in subjects with all three different growth patterns.
各种骨骼和牙齿因素有助于预测下颌第三磨牙的萌出,但这些因素的可靠性在不同生长模式的受试者中可能会有所不同。因此,本研究旨在分析不同面部生长模式受试者下第三磨牙萌出的这些参数。材料与方法本研究对120例治疗前侧位脑电图和正位断层摄影进行了研究,这些受试者平均分为三组(基于SN-GoGn角度):正常、低发散和高发散。根据下颌第三磨牙的萌出情况进一步分为阻生亚组和萌出亚组。使用独立的学生t检验,比较了阻生和爆发亚组之间的9个放射学参数,以检查它们与不同生长模式的下颌第三磨牙爆发的关系。结果三组间爆发亚组和阻生亚组β角差异有统计学意义(p < 0.05)。磨牙后间隙和α角在低发散组显著(p < 0.01), γ角在高发散组显著(p < 0.01)。结论在三种不同生长模式的受试者中,只有β角与第三磨牙萌出有显著相关。
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引用次数: 0
“V” Spring for Reactivation of NiTi Open Coil Spring “V”型弹簧用于镍钛开式线圈弹簧的再激活
Pub Date : 2023-10-01 DOI: 10.1177/03015742231188795
Swapnil Prakash Mangwade, Santosh Jetu Chavan, Wasundhara Ashok Bhad
The NiTi open coil spring is commonly accustomed to creating spaces for crowded teeth. It is difficult to anticipate the length of the open coil spring desired to open up the exact quantity of space; sometimes, the length of the open spring falls short of opening up the space required. In such a case, the base arch wire must be taken out and replaced with an expanded open coil spring, which is both difficult and time-consuming. There are various reactivation methods available, such as split tubings, cutting a C-shaped tube to the desired length, adding extra length to the spring, creating C-rings, and using composite beads. Hence, we have designed a very simple yet effective chairside method to reactivate NiTi open coil spring with the removal of base arch wire.
NiTi开放式线圈弹簧通常用于为拥挤的牙齿创造空间。这是很难预料的长度打开线圈弹簧所希望打开的空间的确切数量;有时,打开弹簧的长度低于打开所需的空间。在这种情况下,必须取出基础拱线并用膨胀的开口线圈弹簧代替,这既困难又耗时。有多种再生方法可供选择,如劈开油管、将c形油管切割至所需长度、增加弹簧长度、制造c形环以及使用复合珠。因此,我们设计了一种非常简单而有效的椅子边方法来重新激活NiTi开圈弹簧,去除基础拱线。
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引用次数: 0
The JIOS Chronicles JIOS编年史
Pub Date : 2023-10-01 DOI: 10.1177/03015742231209597
Vignesh Kailasam
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引用次数: 0
Integration of Nanobioadhesion in Orthodontic Bonding: An In Vitro Study 纳米生物黏附在正畸结合中的整合:一项体外研究
Pub Date : 2023-09-26 DOI: 10.1177/03015742231189052
Mohana Nethivalavan, Ajit Vikram Parihar, Chandan Upadhyay, Vipul Kumar Sharma, T. P. Chaturvedi, Arya K. Das
Objectives The objective of this study was to evaluate the ability of the bioactive glass-bonds to inhibit the demineralization surrounding the orthodontic brackets and evaluate the physical and mechanical properties in order to be accepted as an orthodontic bonding agent. Materials and Methods Preparation of mesoporous bioactive glass (MBG) used an improved sol-gel method. The samples were prepared with different surfactant to oil ratio with 12 groups and one control group with six samples each. The debonding characteristics were analyzed using an Instron Universal Testing Machine (UTM). After six months of pH cycling in vitro saliva solution to simulate the oral environment, the microstructure was analyzed using a field emission gun-based scanning electron microscope (SEM). The sample, which is viable in terms of physical and mechanical properties, is converted into a single paste form by addition of resins and compared with the control group Transbond XT adhesive. Results SEM analysis showed that the prepared MBG particles possess spherical morphology. Novel orthodontic bonding material (BG) provides adequate mechanical properties with bond strength of 7.2 MPa ( p = .304) in order to be accepted as an orthodontic bonding agent since its bond strength both at the time of bonding ( p = 1) and after six months ( p = .325) in simulated salivary conditions is in par with conventional bonding resin (TBXT) with reduced demineralization potential. Conclusion This novel adhesive results in reduced demineralization surrounding orthodontic brackets and possesses optimal physical and mechanical properties to be accepted as an orthodontic adhesive.
本研究的目的是评估生物活性玻璃键抑制正畸托槽周围脱矿的能力,并评估其物理和机械性能,以便被接受为正畸粘接剂。材料与方法采用改进的溶胶-凝胶法制备介孔生物活性玻璃(MBG)。采用不同表面活性剂与油比制备样品,分为12组和1对照组,每组6个样品。采用Instron万能试验机(UTM)对其脱粘特性进行了分析。体外唾液溶液模拟口腔环境pH循环6个月后,采用场发射枪扫描电镜(SEM)对其微观结构进行分析。在物理和机械性能方面可行的样品,通过添加树脂将其转化为单一膏状,并与对照组Transbond XT粘合剂进行比较。结果SEM分析表明,制备的MBG颗粒呈球形。新型正畸粘接材料(BG)在粘接时(p = 1)和六个月后(p = .325)在模拟唾液条件下的粘接强度与传统粘接树脂(TBXT)相当,脱矿潜能降低,因此具有足够的力学性能,粘接强度为7.2 MPa (p = .304),可以被接受为正畸粘接剂。结论该胶粘剂具有良好的物理力学性能,能有效减少托槽周围的脱矿现象,是一种理想的正畸胶粘剂。
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引用次数: 0
期刊
Journal of Indian Orthodontic Society
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