MSE骨性扩弓后上颌牙根及颊侧齿槽骨吸收状况的CBCT分析

目的:分析MSE骨性扩弓治疗后上颌牙根及颊侧齿槽骨的吸收变化情况.方法:选取上颌横向发育不足(上牙弓狭窄)患者16例(年龄16～24岁;男7例,女9例).应用MSE骨性扩弓器进行扩弓治疗,所有患者均在3个月内完成加力,扩弓结束后拍摄CBCT与扩弓前的CBCT比较,所有DICOM数据导入Mimics17.0软件进行牙齿三维重建,分析扩弓前后上中切牙,第一前磨牙,第二前磨牙,第一磨牙的牙根长度(体积)及颊侧齿槽骨高度和厚度的变化.结果:扩弓前后的CBCT对比显示:(1)所有测量牙齿的牙根长度及体积仅有轻微改变,但无统计学意义(P>0.05);(2)颊侧齿槽骨高度及厚度的测量发现支抗牙部位存在显著改变(P<0.05);非支抗牙部位的改变均无统计学意义(P>0.05).结论:MSE骨性扩弓后未见显著牙根吸收;颊侧齿槽骨高度和厚度在支抗牙部位的吸收显著高于非支抗牙部位,为临床选择扩弓器提供一定参考依据.     

MSE骨性扩弓后上颌牙根及颊侧齿槽骨吸收状况的CBCT分析

目的:分析MSE骨性扩弓治疗后上颌牙根及颊侧齿槽骨的吸收变化情况.方法:选取上颌横向发育不足(上牙弓狭窄)患者16例(年龄16～24岁;男7例,女9例).应用MSE骨性扩弓器进行扩弓治疗,所有患者均在3个月内完成加力,扩弓结束后拍摄CBCT与扩弓前的CBCT比较,所有DICOM数据导入Mimics17.0软件进行牙齿三维重建,分析扩弓前后上中切牙,第一前磨牙,第二前磨牙,第一磨牙的牙根长度(体积)及颊侧齿槽骨高度和厚度的变化.结果:扩弓前后的CBCT对比显示:(1)所有测量牙齿的牙根长度及体积仅有轻微改变,但无统计学意义(P>0.05);(2)颊侧齿槽骨高度及厚度的测量发现支抗牙部位存在显著改变(P<0.05);非支抗牙部位的改变均无统计学意义(P>0.05).结论:MSE骨性扩弓后未见显著牙根吸收;颊侧齿槽骨高度和厚度在支抗牙部位的吸收显著高于非支抗牙部位,为临床选择扩弓器提供一定参考依据.     

MSE骨性扩弓后上颌牙根及颊侧齿槽骨吸收状况的CBCT分析

目的:分析MSE骨性扩弓治疗后上颌牙根及颊侧齿槽骨的吸收变化情况.方法:选取上颌横向发育不足(上牙弓狭窄)患者16例(年龄16～24岁;男7例,女9例).应用MSE骨性扩弓器进行扩弓治疗,所有患者均在3个月内完成加力,扩弓结束后拍摄CBCT与扩弓前的CBCT比较,所有DICOM数据导入Mimics17.0软件进行牙齿三维重建,分析扩弓前后上中切牙,第一前磨牙,第二前磨牙,第一磨牙的牙根长度(体积)及颊侧齿槽骨高度和厚度的变化.结果:扩弓前后的CBCT对比显示:(1)所有测量牙齿的牙根长度及体积仅有轻微改变,但无统计学意义(P>0.05);(2)颊侧齿槽骨高度及厚度的测量发现支抗牙部位存在显著改变(P<0.05);非支抗牙部位的改变均无统计学意义(P>0.05).结论:MSE骨性扩弓后未见显著牙根吸收;颊侧齿槽骨高度和厚度在支抗牙部位的吸收显著高于非支抗牙部位,为临床选择扩弓器提供一定参考依据.     

磁力扩弓对后牙牙根长度的影响

目的 应用锥体束CT（CBCT）观察磁力扩大上颌牙弓后后牙牙根的吸收情况。方法 选取采用磁力扩弓矫治器进行上颌扩弓的32例患者,拍摄扩弓前后CBCT,测量上颌后牙牙根长度,采用配对t检验分析扩弓前后牙根长度的变化,采用成组t检验分析不同发育阶段的牙根长度的差异。结果 磁力扩弓后,支抗牙较非支抗牙更易出现牙根吸收。根尖孔已闭合组（G2组）上颌后牙牙根长度有减少的趋势,第一磨牙近中颊根长度减少,第一前磨牙颊根减少。根尖孔未闭合组（G1组）后牙牙根未见吸收。结论 磁力扩弓对支抗牙的牙根长度有影响。G1组的支抗牙对于矫形力的耐受强于G2组。早期进行扩弓治疗可能降低牙根吸收的风险。     

外科辅助骨支持式快速扩弓技术

上颌快速扩弓技术是正畸临床上治疗上颌骨横向发育不全的有效手段。对于骨骼发育成熟的成年患者,常需辅以外科骨皮质切开术,即外科辅助快速扩弓技术。由于目前临床上常用的牙支持式扩弓矫治器存在支抗牙颊倾、颊侧牙根吸收等不良反应,Mommarts医师于1999年首先提出了骨支持式的腭牵张器,配合骨皮质切开术,称为外科辅助骨支持式快速扩弓技术,本文就此技术作一综述。     

腭部不同类型快速扩弓配合前方牵引的应用进展

上颌快速扩弓配合前方牵引面具是早期治疗上颌骨发育不足的骨性安氏Ⅲ类错牙合常见方法之一.传统方法常用牙和黏膜支持式装置治疗替牙期及恒牙早期的骨性Ⅲ类患者,随着种植支抗的发展,种植钉被广泛应用于正畸治疗中,展示出稳定的骨性支抗效果.本文将对腭部不同类型快速扩弓配合前方牵引技术作一简要综述,为临床治疗提供参考.     

口外弓推磨牙远移对牙根吸收的影响

目的：评价口外弓推磨牙远移对磨牙牙根吸收的影响.方法：选取使用口外弓推磨牙远移的病例30例.在全颌曲面断层片上测量牙根吸收量,通过头影测量描记图测量磨牙远移距离.对30例样本治疗前后牙根长度做配对t检验,对磨牙远移距离和根吸收量做相关分析.结果：口外弓推磨牙后,磨牙近远中根治疗前后牙根长度的比较均有统计学意义（p＜0.01）,距离与根吸收量呈正相关,近远中根的相关系数分别为r近=0.9862,r远：0.9895.结论：口外弓推磨牙远移后会造成牙根吸收,但吸收量较微小.磨牙远移距离与根吸收呈正相关,牙齿移动距离是影响牙根吸收的重要因素之一.     

青春期上颌快速扩弓对上呼吸道尺寸和功能的影响及长期有效性的系统评价再评价

目的:对青春期上颌快速扩弓(rapid maxillary expansion,RME)对上呼吸道尺寸和功能的影响及长期有效性的系统评价进行再评价.方法:检索Cochrane,EMBASE,Medline和PubMed数据库,搜索公开发表的关于上颌快速扩弓与上呼吸道关系的系统评价,时限均为建库至2020年4月,2名作者...     

快速扩弓研究进展

快速扩弓是临床常用的一种扩弓方法。本文从快速扩弓的结构、加力方式、组织学变化、颌面变化以及快速扩弓的保持与复发等问题进行了综述。     

2种上颌快速扩弓器临床效果的Meta分析

目的:比较牙支持式及混合支持式扩弓器进行上颌快速扩弓的临床效果.方法:计算机检索PubMed、Cochrane Library、EMbase、CBM、中国知网、维普、万方数据库,收集所有比较牙支持式及混合支持式扩弓器进行上颌快速扩弓的文献,检索时限均从建库至2015-10-31.按照纳入、排除标准,由2位研究者评价纳入研究的质量并提取资料后,采用RevMan 5.3软件进行Meta分析.结果:共纳入研究8篇,患者206例.Meta分析结果显示,牙支持式及混合支持式扩弓器相比,两者在扩弓矫治前后右侧第一磨牙倾斜角度变化[MD=-1.62,95％CI(-3.18,-0.07)]、第一前磨牙间距变化[SMD=-0.86,95％CI(-1.47,0.25)]、牙槽突倾斜角变化[SMD=-0.86,95％CI(-1.10,-0.20)]方面的差异有统计学意义.在扩弓矫治前后第一磨牙间距变化[SMD=-0.08,95％CI(-0.61,0.45)]、左侧第一磨牙倾斜角度变化[MD=-1.12,95％CI(-2.57,0.33)]、上颌骨横向宽度变化[SMD=-0.30,95％ CI(-1.08,0.47)]方面的差异无统计学意义.结论:牙支持式及混合支持式扩弓器对上颌牙弓的扩张效果相当,牙支持式扩弓器会造成更多的第一磨牙及牙槽突倾斜.     

Surgically assisted rapid maxillary expansion: a systematic review of complications

A systematic review of the literature on the complications of surgically assisted maxillary expansion (SARME) was performed. The search strategy was based on the PRISMA guidelines. The PubMed, SCOPUS, and Cochrane Library databases were searched. Data were extracted from the full texts after screening of the abstracts and titles. Human clinical studies encompassing ‘maxillary expansion’, ‘palatal expansion’, ‘SARME’, or ‘SARPE’ and that reported sufficient data for ‘complication’ were included. In vitro studies, case reports, meta-analyses, reviews, book chapters, animal studies, and studies with missing or insufficient data were excluded. The final selection included 12 articles for data extraction. A total of 851 patients underwent SARME, with 187 reported complications (21.97%). Epistaxis (2.47%) and postoperative pain (2.00%) were the most often reported minor complications, and asymmetric or inadequate expansion presented an occurrence rate of 4.47%. Minor complications were equally distributed between surgical (49.30%) and orthodontic complications (50.70%). The technique without pterygomaxillary disjunction increased the occurrence of minor complications (29.95% vs. 16.87%), and the expansion pattern with less than 0.5 mm/day increased the occurrence of orthodontic complications (30.93% vs. 1.83%), i.e. asymmetric expansion. In conclusion, SARME procedures mostly present minor complications. Although several types of complication are described in the literature, occurrence rates are low, and technical issues such as pterygomaxillary disjunction and the pattern of distraction can be predictors of the complication risk.     

绝对骨支持式上颌快速扩大动物模型建立

目的建立绝对骨支持式上颌快速扩弓的实验动物模型。方法选用4只22个月龄的广西巴马小型猪,随机选取1只为空白对照,对其余3只以上颌骨种植体为支抗进行上颌快速扩弓。扩弓持续12d后保持30d。通过X线片测量,组织学观察上颌牙弓扩开结果。结果显示上颌骨中缝被有效扩开。结论本实验成功地建立了绝对骨支持式上颌快速扩大动物模型。     

外科辅助上颌骨快速扩弓对鼻气道和上颌复合体影响的系统评价

目的 评价外科辅助上颌骨快速扩弓对鼻气道和上颌复合体的影响.材料和方法 我们计算机检索和手动检索以下数据库:PubMed,ISI Web of Knowledge,Ovid,EBSCO Dentistry & Oral Science Source,Cochrane Library and Cochrane Central Register of Controlled Trials (CENTRAL),纳入采用外科辅助上颌骨快速扩弓治疗的研究,要求受试者人数＞10.依据方法学质量评价量表对纳入的文献进行质量评价.结果 初步检索后获得111篇相关的文献,最终对符合纳入标准且方法学质量评价得分较高的4篇文献的4个结果进行Meta分析.结果表明扩弓后,鼻腔后部容积、使用鼻粘膜减充血剂后鼻腔后部最小横截面积、牙弓前后部宽度均增加显著(P＜0.05).结论 从本研究Meta分析中得出结论:随着上颌基骨和牙槽骨的增宽,外科辅助上颌骨快速扩弓增加鼻腔后部最小横截面积并显著增加鼻腔容积,从而减小鼻气道阻力.     

Effects of rapid maxillary expansion on temporomandibular joints:: A systematic review

ObjectiveTo evaluate the impact of rapid maxillary expansion (RME) on the condylar position, disc joint, joint space, and interarticular relationship in growing patients.Materials and MethodsA systematic search was performed in nine databases. The clinical studies selected included those with pre- and post-magnetic resonance, conventional computed tomography or cone beam tomography in growing patients. Risk of bias assessment was performed using the Cochrane Collaboration tool for controlled clinical studies and National Heart, Lung, and Blood Institute (NHLBI) Quality Assessment for Before-After Studies With No Control Group.ResultsInitially, 4303 records were identified. Only eight studies fulfilled the criteria and were included in the qualitative analysis. Of those, two were controlled clinical studies with a risk of uncertain to high bias. The remaining papers had a low to moderate risk of bias. Results showed that RME in children and adolescents promoted the following: remodeling in the head and or condylar branch, changes in condylar position and joint space, maintenance of improved symmetry between the condyles, and no ability to modify the position or shape of the articular disc.ConclusionsRME in growing patients is able, in the short term, to modify the condyle-fossa relationship but does not change the position or shape of the articular disc. The intercondylar symmetric relationship is maintained or improved. Although the NHLBI score shows low to moderate risk of bias, the clinical relevance of these review findings is limited by Cochrane and Grades of Recommendation, Assessment, Development and Evaluation scores.     

上颌快速扩弓的生物力学研究进展

上颌快速扩弓是临床上常用的治疗方法。上颌骨邻近组织结构复杂,而快速扩弓的矫治力作用于牙和腭部再通过骨和软组织的传导分散到整个上颌骨及其周围组织,因此其生物力学作用机制亦十分复杂。下面就其生物力学原理的国内外研究进展进行综述,以期对临床医师应用该法有所帮助。     

手术辅助快速扩弓矫治上颌横向发育不足的临床疗效分析

目的:评价手术辅助快速扩弓矫治成人上颌横向发育不足病例牙齿和基骨的变化。方法:上颌发育不足患者20例(男13例,女7例)按年龄分为扩弓组和手术组,扩弓组(平均年龄12.51±0.82岁)行矫形快速扩弓治疗;手术组(平均年龄19.07±2.54岁)行手术协助快速扩弓治疗。所有患者治疗前后摄头颅定位正侧位片和咬合片,头影测量分析、比较。结果:两组病例均有明显的扩弓效果,手术组牙弓宽度增加更为显著,扩弓组牙弓长度增加明显,但组间均无显著性差异;治疗前后,手术组B点显著后移,而扩弓组B点前移,组间有显著性差异(P<0.05);治疗前后,手术组腭平面后旋,扩弓组腭平面前旋,组间有显著性差异(P<0.01);治疗前后,两组病例上颌切牙均内倾,组间无显著性差异。结论:手术协助快速扩弓治疗成人上颌横向发育不足,可取得良好的扩弓效果;对上下颌骨、上颌切牙在矢状面的改变更有利于III类错畸形的矫正;在病例的选择上,更适用于低角病例。     

Multiple idiopathic cervical root resorption: A systematic review

The current literature on multiple idiopathic cervical root resorption (MICRR), a rare and aggressive form of external root resorption, is limited to case reports and series. Therefore, we performed a systematic review of this condition. A comprehensive search of PubMed, Embase, Web of science, Cochrane Library, CNKI, and WANFANG was conducted using key terms relevant to MICRR, supplemented by a grey literature search. Risk of bias was assessed using Cochrane's and Joanna Briggs Institute's tools. A total of 36 studies with 47 cases were included. MICRR is more common among younger females and may be related to hormonal changes and denosumab use. Initially, the premolars are usually affected but all permanent teeth may eventually be involved. Cone-beam computed tomography is recommended for diagnosis and assessment of resorptive lesions. The management is focused on complete removal and restoration of the resorptive tissue to maintain the tooth's structural integrity. However, MICRR usually has a poor prognosis. Due to its invasive and aggressive behavior, MICRR requires greater attention.     

Nationwide survey of surgically assisted rapid maxillary expansion

We aimed to gather data on the current practice of surgically assisted rapid maxillary expansion (SARME) in the UK. Surveys were posted in the mail to all members of the British Association of Oral and Maxillofacial Surgeons (n = 379) and 166 (44%) responded. In the previous year 69 responders (42%) had done at least one SARME operation. The technique used by individual surgeons may be more experience-based than evidence-based, which leads to considerable variation.     

Maxillary incisor root resorption after rapid palatal expansion in Felis catus

Root resorption after rapid palatal expansion (RPE) treatment was found in anchored teeth but has not been studied on non-anchored incisors. This study evaluated root resorption, root tipping, and root proximity of maxillary incisors after RPE treatment. Fourteen cats were divided into treated (n = 10) and untreated (n = 4) groups. The RPE treatment consisted of active, retention, and relapse phases, lasting 25, 60 and 60 d, respectively. Standardized occlusal radiographs were taken to measure tipping and root proximity before and after each treatment phase. Maxillary incisors were analysed histologically by fluorescent microscopy for root resorption. Data was analysed statistically with anova with repeated measures, t-test and Pearson's coefficient of correlation. Root resorption was confined to the first incisors and was 750-fold greater in the treated vs. the control group. Root tipping and root proximity were significantly greater (2.5- and 17-fold, respectively) in the first than in the second maxillary incisor and highly correlated with root resorption (r = -0.927 and 0.723, respectively). This suggests a cause (tipping and root proximity) and effect (root resorption) relationship. Data suggest that first maxillary incisor susceptibility to root resorption during RPE is associated with severe tipping and root proximity.