Effect of different interventions on orthodontic tooth movement acceleration:A network meta-analysis

Objective: To explore the effectiveness of various interventions in accelerating tooth movement, a systematic review and net-work meta analysis were used to draw a conclusion. Methods: MEDLINE, EMBASE, Willey Library, EBSCO, Web of Science Databases, and Cochrane Central Register of Controlled Trials databases to identify relevant studies. ADDIS 1.16.6 and Stata 16.0 software were used for NMA. Results: Five thousand five hundred and forty-two articles were searched out. After screening by two independent investigators, forty-seven randomized controlled trials, 1 390 participants, were included in this network meta-analysis. A total of 11 interventions involving Piezocision (Piezo), Photobiomodulation therapy (PBMT), Plate- let-rich plasma(PRP), Electromagnetic field(EF), Low intensity laser therapy(LLLT), Low intensity pulsed ultrasound(LI-PUS), Low-frequency vibrations(LFV), Distraction osteogenesis(DAD), Corticotomy(Corti), Microosteoperforations (MOPS), Traditional orthodontic(OT)were identified and classified into 3 classes including surgical treatment, non-surgical treatment and traditional orthodontic treatment. According to SUCRA probability ranking of the best intervention effect, when orthodontic treatment lasted for 1 month, PBMT (90.6%), Piezo(87.4%) and MOPs(73.6%)were the top three interventions to improve the efficiency of canine tooth movement. When orthodontic treatment lasted for 2 months, Corti (75.7%), Piezo (69.6%) and LFV(58.9%)were the top three interventions for improving the mobility efficiency of canine tooth movement. When orthodontic treatment lasted for 3 months, Cort (73.3%), LLLT(68.4%)and LFV(60.8%)were the top three interventions for improving the mobility efficiency of canine tooth movement. Conclusion: PBMT and Piezo can improve the efficiency of canine tooth movement significantly after 1 month, while Corti and LFV can improve the efficiency of canine tooth movement better after 2 and 3 months.

Histological changes following surgically-assisted rapid tooth movement through resistance reduction and distraction osteogenesis in dogs

Objective To investigate the histological changes of rapid tooth movement in dogs treated by resistance reduction and distraction osteogenesis,aiming to establish an animal model and further to reveal the remodeling mechanism of rapid tooth movement. Methods A total of 8 local hybrid dogs were selected as subjects for this study. The second pre-molar was extracted on both sides. The experimental side underwent alvelor surgery for resistance reduction and a home-made tooth-borne intraoral distraction device was installed for rapid tooth movement,while for the other side (control side) only tooth-borne intraoral distraction device was used for rapid tooth movement. The longest active force-delivery span was 2 weeks,followed by 6-week retention. The distance between the moved tooth and anchor unit was recorded weekly,and radiography was performed for each side before and after distraction. The surrounding tissues including periodontal ligament and alveolar bone were sectioned for histological analysis. Results The average distance of tooth movement was 3.55mm on the experimental side and 1.11mm on the control side. The rate of tooth movement was notably higher (P<0.01) and no significant apical root resorption was detected by X-ray on the experimental side. The active alvelor bone remodeling was found on the tension and pressure sides. However,there was no significant difference between the experimental side and the control side after the retention period. Conclusion The rate of orthodontic tooth movement can be accelerated through resistance reduction and periodontal distraction without any unfavorable effects but at minimal anchorage loss.

Regular nicotine intake increased tooth movement velocity,osteoclastogenesis and orthodontically induced dental root resorptions in a rat model

Orthodontic forces have been reported to significantly increase nicotine-induced periodontal bone loss. At present, however, it is unknown, which further （side） effects can be expected during orthodontic treatment at a nicotine exposure corresponding to that of an average European smoker. 63 male Fischer344 rats were randomized in three consecutive experiments of 21 animals each （A/B/C） to 3 experimental groups （7 rats, 112/3）. （A） cone-beam-computed tomography （CBCT）; （B） histology/serology; （C） reverse- transcription quantitative real-time polymerase chain reaction （RT-qPCR）/cotinine serology--（1） control; （2） orthodontic tooth movement （OTM） of the first and second upper left molar （NiTi closed coil spring, 0.25 N）; （3） OTM with 1.89 mg-kg- 1 per day s.c. of L（- ）-nicotine. After 14 days of OTM, serum cotinine and IL-6 concentration as well as orthodontically induced inflammatory root resorption （OIIRR）, osteoclast activity （histology）, orthodontic tooth movement velocity （CBCT, within 14 and 28 days of OTM） and relative gene expression of known inflammatory and osteoclast markers were quantified in the dental-periodontal tissue （RT-qPCR）. Animals exposed to nicotine showed significantly heightened serum cotinine and IL-6 levels corresponding to those of regular European smokers. Both the extent of root resorption, osteoclast activity, orthodontic tooth movement and gene expression of inflammatory and osteoclast markers were significantly increased compared to controls with and without OTM under the influence of nicotine. We conclude that apart from increased periodontal bone loss, a progression of dental root resorption and accelerated orthodontic tooth movement are to be anticipated during orthodontic therapy, if nicotine consumption is present. Thus patients should be informed about these risks and the necessity of nicotine abstinence during treatment.

Assessing gray matter volume in patients with idiopathic rapid eye movement sleep behavior disorder

Idiopathic rapid eye movement sleep behavior disorder(iRBD) is often a precursor to neurodegenerative disease. However, voxel-based morphological studies evaluating structural abnormalities in the brains of iRBD patients are relatively rare. This study aimed to explore cerebral structural alterations using magnetic resonance imaging and to determine their association with clinical parameters in iRBD patients. Brain structural T1-weighted MRI scans were acquired from 19 polysomnogram-confirmed iRBD patients(male:female 16:3; mean age 66.6 ± 7.0 years) and 20 age-matched healthy controls(male:female 5:15; mean age 63.7 ± 5.9 years). Gray matter volume(GMV) data were analyzed based on Statistical Parametric Mapping 8, using a voxel-based morphometry method and two-sample t-test and multiple regression analysis. Compared with controls, iRBD patients had increased GMV in the middle temporal gyrus and cerebellar posterior lobe, but decreased GMV in the Rolandic operculum, postcentral gyrus, insular lobe, cingulate gyrus, precuneus, rectus gyrus, and superior frontal gyrus. iRBD duration was positively correlated with GMV in the precuneus, cuneus, superior parietal gyrus, postcentral gyrus, posterior cingulate gyrus, hippocampus, lingual gyrus, middle occipital gyrus, middle temporal gyrus, and cerebellum posterior lobe. Furthermore, phasic chin electromyographic activity was positively correlated with GMV in the hippocampus, precuneus, fusiform gyrus, precentral gyrus, superior frontal gyrus, cuneus, inferior parietal lobule, angular gyrus, superior parietal gyrus, paracentral lobule, and cerebellar posterior lobe. There were no significant negative correlations of brain GMV with disease duration or electromyographic activity in iRBD patients. These findings expand the spectrum of known gray matter modifications in iRBD patients and provide evidence of a correlation between brain dysfunction and clinical manifestations in such patients. The protocol was approved by the Ethics Committee of Huashan Hospital(approval No. KY2013-336) on January 6, 2014. This trial was registered in the ISRCTN registry(ISRCTN18238599).

Three-dimensional Finite Element Analysis of the Mechanical Stress on Root from Orthodontic Tooth Movement by Sliding Mechanics

In order to study mechanical stress on root from orthodontic tooth movement by sliding mechanics, a 3-dimensional finite element model incorporating all layers of a human mandibular dental arch with orthodontic appliance has been developed to simulate mechanical stress on root from the orthodontic tooth movement. Simulated orthodontic force of 2 N at 0, 30 and 45 degree from the horizontal axis was applied to the crown of the teeth. The finite element analysis showed when orthodontic forces were applied to the tooth, the stress was mainly concentrated at the neck of the tooth decreasing uniformly to the apex and crown. The highest stress on the root was 0.621 N/mm^2 for cervical margin of the canine, and 0.114 N/mm^2 for apical region of the canine. The top of canine crown showed the largest amount of displacement （2.417 μm）, while the lowest amount of displacement was located at the apical region of canine （0.043 μm）. In conclusion, this model might enable one to simulate orthodontic tooth movements clinically. Sliding force at 2 N is ideal to ensure the bodily orthodontic tooth movement. The highest stress concentration in the roots was always localized at the cervical margin when orthodontic force of 2 N at 0, 30 and 45 degree from the horizontal axis, so there may be the same risk of root resorption when orthodontic force of 2 N at 0, 30 and 45 degree was used in clinic cases.

TRAIL Immunolocalisation in the Rat Periodontal Ligament during Experimental Tooth Movement. A Preliminary Study

The aim of this study was to evaluate immunohistochemically TRAIL (TNF-Related Apoptosis Inducing Ligand) expression in the periodontal ligament of rats’ molars considering its distribution pattern in the tension and compressive regions of ligament during orthodontic movement. Sixteen Sprague-Dawley rats, weighing between 120 and 200 gwere used in the present study. Tooth movement was induced by placing elastic bands between the maxillary first and second molars. The elastic bands were left in place for 12 (time T1) and 24 (time T2) hours. After rats’ euthanasia, maxillae were dissected free and the sections were exposed to a primary rabbit polyclonal anti-TRAIL anti-body. The staining status was identified as either negative or positive by using 3,3’-diaminobenzidine (DAB) to develop the immunoreaction. Data were analyzed using ANOVA test and a post-hoc Dunn’s Multiple Comparison test. P-values of less than 0.05 were considered statistically significant. The staining for TRAIL in the tension side appeared darker (intensity of staining = 2) than in the compressive side (intensity of staining = 1) 12 h after the tooth movement. The stainings of both sides of PDL were observed to be up-regulated 24 h after the application of the force (tension side = 3, compression side = 2;P 0.05). TRAIL is expressed in the periodontal ligament of rats’ molars during experimental tooth movement both in the compression and in the tension sides. The latter showed the highest amount of TRAIL immunolabeling.

Interleukin-1α and tumor necrosis factor-α expression on the compressed side of gingiva during orthodontic tooth movement

Objectives: The aim of this study was to investigate the effect of orthodontic loading on the expression of interleukin-1α (IL-1α) and tumor necrosis factor-α (TNF-α) in compressed gingiva. Materials and Methods: Twenty-four male Wistar rats were used with four rats as controls at day 0. In ten rats, corticotomy was performed on either left or right side and the re-maining side was served as control, and killed at 7 and 14 days. In the remaining ten rats, maxillary right and left first molars were moved orthodontically with a constant force of 20 g;appliance and appliance in conjunction with cortictomy (appliance-corticotomy) were sequentially alternated between left and right sides and euthanized at 7 and 14 days. Real time polymerase chain reactions of compressed gingiva excised from the euthanized rats was performed to measure mRNA expressions of IL-1α and TNF-α. Results: There were no significant differences in the expression of IL-1α between all the groups. On the other hand, TNF-α from the pressure side in the ap- pliance group and the appliance in conjunction with corticotomy group showed significant increase on the 7th day compared to that of either control or corticotomy group. Conclusions: Orthodontic loading induced the elevation of TNF-α in compressed

External Root Resorption During Standardised Orthodontic Tooth Movement In Young And Adult Rats

目的 :比较研究幼鼠和成年鼠正畸牙齿移动过程中的牙根吸收。方法 :本研究包括两组大鼠 ,其中幼鼠 30只 (年龄约 6周 ) ,成年鼠 30只 (年龄约 912个月 )。大鼠上颌牙一侧用于实验侧 ,另一侧用于对照。实验侧的三颗磨牙用结扎丝颌粘接剂固为一个整体 ,在超弹性拉簧作用下 (力值为 0 .1牛顿 )向切牙侧移动。 1,2 ,4 ,8和 12周时给予大鼠过量麻醉剂 ,材料用于组织学研究。上颌第一磨牙的近中颊侧根为根吸收研究对象。压力侧和张力侧的牙根吸收程度在显微镜下进行长度测量。实验侧与对照侧 ,压力侧与张力侧 ,幼鼠与成年鼠之间的牙根吸收程度分别以实验时间为参照 ,在统计学手段下进行了组间和组内分析和比较 ,以探讨牙齿移动时间和年龄因素对于牙根吸收的影响。结果 :实验侧的牙根吸收在幼鼠与成年鼠之间在 1,2 ,4 ,8周时均没有统计学差异。而在第 12周时 ,成年鼠实验侧牙根吸收大于幼鼠 (P <0 .0 5 )。成年鼠实验组压力侧的牙根吸收明显大于对照组压力侧 ,而在幼鼠组没有发现这一差异。两组年龄幼鼠的实验组其压力侧和张力侧的牙根吸收均高度相关。结论 :相对于对照侧 ,正畸牙齿移动并没有在幼鼠的实验侧诱发更多的牙根吸收。在成年鼠 ,长期的正畸作用力倾向于诱发更多的牙根吸收。这些研究结果表明对于正?

Dynamic Analysis of the Expression of HSP70 during Experimental Tooth Movement in Rats

In this study, the expression of HSP70 during experimental tooth movement was dynamically observed and the relationship between HSP70 and orthodontic periodontal tissue remodeling were observed. The orthodontic appliance was placed between the right maxillary first molar and maxillary central incisors of adult SD rats to establish a rat molar movement model. Immunohistochemistry was performed 1, 3, 5, 7 and 14 day（s） after orthodontic force application to observe the expression and localization of inducible HSP70. The expression of HSP70 was strongly positive in the early stage of the tooth movement, became gradually less positive, and was weakly positive in the restoration stage. There was difference in staining pattern between different parts of PDL during the same period. These results suggest that the expression of HSP70 and difference in staining pattern among different parts of PDL during orthodontic tooth movement in rats may be implicated in stress response and remodeling of periodontal tissue.

Chemogenetic activation of sublaterodorsal tegmental glutamatergic neurons alleviates rapid eye movement sleep behavior disorder symptoms in a chronic rat model of Parkinson disease

Rapid eye movement(REM)sleep behavior disorder(RBD)is a parasomnia that is featured by elevated motor behaviors and dream enactments during REM sleep.Clinical observations show that RBD bears significant relevance with several synucleinopathies such as Lewy body dementia and Parkinson disease(PD),and often develops prior to their diagnosis.Being a potential biomarker of PD,investigating the relationship of RBD symptoms and their emergence in developing PD would provide insight intoits pathogenesis.Here,in a chronic model of PD,rats with daily rotenone treatment exhibited key RBD features,including elevated sleep muscle tone,sleep fragmentation and EEG slowing at different time points.Based on detectedearly alpha synuclein aggregation and neural apoptosis in the sublaterodorsal tegmental nucleus(SLD),an area known to promote REM sleep and maintain sleep muscle atonia,the possible involvement of SLD glutamatergic neurons was interrogated.Via chemogenetic activation of SLD glutamatergic neurons,key RBD symptoms and EEG slowing in REM sleep were alleviated.These results are consistent with a progressive degeneration in REM sleep promoting pathways.Our findings provide a foundation for further studies into RBD and its relationship to neurodegenerative diseases.

EFFECT OF PULSED ELECTROMAGNETIC FIELD AND BIOMECHANICAL FORCE ON ORTHODONTIC TOOTH MOVEMENT

The purpose of this experiment is to investigate the effect of pulsed electromagnetic field (PEMF) and biomechanical force on orthodontic tooth movement by means of measurement of gross tooth movement anatomic data, light microscopic evaluation and transmission electromicroscopic evaluation. The results indicate that PEMF combined with biomechanical force could accelerate the rate and amount of orthodontic tooth movement, enhance bone deposition in tension side and resorption in compression side. The results also suggest that PEMF could accelerate orthodontic tooth movement as a result of increase in quantity of active cells, PEMF couldn’t change the ultrastructure of cells.

Gender Differences in Rapid Eye Movement-Related Sleep Disordered Breathing

Sleep disordered breathing (SDB) is an independent risk factor for cardiovascular disease. It is known to be associated more frequently with men than women, particularly in the premenopausal age range. The goal of this study is to evaluate gender differences among Korean patients diagnosed with SBD. This study included 309 patients who visited our Sleep Clinic due to sleep-related symptoms and were diagnosed with SDB by overnight polysomnography (PSG). We analyzed age, gender, body mass index, various PSG indices including sleep stages, apnea-hypopnea index (AHI) and AHI ratio in rapid eye movement (REM) versus non-REM (NREM) sleep stages (R:N ratio). Of those 309 patients diagnosed with obstructive sleep apnea, 217 (70.2%) were men (mean age 51.05 ± 12.64 years) and 92 (29.8%) were women (mean age 64.53 ± 10.43 years). The mean AHI during total sleep time was 30.34 ± 21.17 in men and 21.47 ± 17.14 in women (P P P = 0.402). REM SDB with R:N ratio higher than 2.0 was more frequently observed in women than in men, 34.8% (32/92) of women, compared with 11.9% (26/217) in men (P 60 years old. These findings suggest the possibility of different pathophysiologic mechanisms of SDB between genders and also between NREM versus REM sleep, which can be partly explained by the influence of female sex hormones.

Factors Associated with Orthodontic Tooth Movement in Periodontally Compromised Patients

There is no consistent relationship between malocclusion and periodontal disease but certain characteristics of malocclusion can promote a pathologic environment conducive to periodontal disease. One of the dramatic means available to improve the local environmental factors is through orthodontic tooth movement. The pretreatment periodontal conditions can include excessive tooth mobility, advanced crestal bone loss, infrabony defects, tipped molars, furcation involvement, and hard and soft tissue dehiscences. Movement of teeth in the presence of periodontal inflammation can result in an increased loss of attachment and irreversible crestal loss. Although absolute reduction in bone and attachment levels does not contraindicate orthodontic correction, it does increase the difficulty of delivering controlled orthodontic mechanics that would potentially minimize further bone loss. The present review article discusses the various factors that are associated with orthodontic tooth movement in periodontally compromised patients namely: 1) tooth movement into infrabony pockets;2) tooth movement into compromised bone areas;3) tooth movement through cortical bone;4) extrusion (eruption);5) intrusion;6) tipping.

Cell biology in orthodontic tooth movement:The known and the unknown

This review is aimed at providing, at the cellular level, a concise and complete overview of the important knowledge on the mechanism of orthodontic tooth movement to orthodontists and postgraduates who are involved or interested in basic research. The construction of this article was oriented to the following key questions: Where an osteoclast starts to its first resorption site? When the cascade of a resorption cycle starts? What are the factors involved in bone remodeling and how they orchestrate? What happens before and after the formation of a resorption pit? Major findings in these aspects were summarized and discussed. In addition, related biological phenomenon such as orthodontically induced root resorption was intensively reviewed. By means of an updated and systematic review, the author intended to introduce more biological evidence to orthodontic intervention and to encourage evidence-based treatment in daily orthodontic practice.

无托槽隐形矫治器内收前牙时后牙移动趋势及牙周膜应力分布

目的 :利用三维数字化技术对无托槽隐形矫治器内收前牙时后牙移动趋势及牙周膜应力分布进行分析。方法 :选择广西壮族自治区人民医院2017年6月—2022年6月收治的88例患者CBCT数据,将其输入Mimics 20.0软件中,对其各部位进行初步抽取,使用STL文件进行存储。通过Geomagic Studio 2014软件进行修补和优化,在优化基础上,构建无托槽隐形矫治器和牙周膜模型。利用Ansys Workbench19.0 FEM软件对6个FEM模型进行模拟仿真与观测,分析当前牙整体回收时,不同组别患者支抗牙的初始移动趋势与牙周膜范式等效应力分布。采用SPSS 21.0软件包对数据进行统计学分析。结果:所有患者支抗牙均发生不同程度牙根部颊向移动等倾向,其中,第二前磨牙位置移动在近中咬合方向上表现最为明显;而水平矩形附件组与垂直矩形附件组成相对关系,牙周膜最大范式等效应力大范围分布于牙颈部,接着是根尖区,以NA组支抗牙的范式等效应力值最大。附件垂直矩形组中,所有患者牙周膜最大范式等效应力值显著小于水平矩形组。结论:正畸牙附件设计对前牙回收时的位置移动具有较强抑制作用,在一定程度上提升了牙三维方向移动的精确性。无托槽隐形矫治器应用初期,患者牙周膜受到的范式等效应力较大。

正畸过程中牙齿三维方向变化的模型测量方法研究进展

牙齿三维方向上移动效率的评价是评估正畸疗效的重要内容之一。随着科学技术的发展,矫治器及矫正技术不断进步,用于研究正畸矫治牙齿三维方向移动效率的方法和工具也在不断更新。本文以牙齿移动测量方式发展为主线,介绍了由手工石膏模型测量转向利用计算机软件对数字化模型的测量过程和依据,并对三维数字化模型数据获取方式、储存文件格式及可选择的分析处理软件进行了说明,以及回顾了前人对三维数字化模型进行三维重叠的部分研究,总结了目前对光学扫描及X线扫描得到的两种三维模型数据常用的配准方法和配准区域的选择。

特立帕肽对骨质疏松大鼠正畸牙移动中牙根吸收影响的mirco-CT研究

目的:使用mirco-CT探究特立帕肽对骨质疏松大鼠正畸牙移动过程中牙根吸收的影响。方法:将72只8周龄的雌性Wistar大鼠均分为去势组、特立帕肽组和对照组,对去势组及特立帕肽组行去卵巢手术并对对照组行假手术处理。12周后,对大鼠左上第一磨牙施加50 g牙移动力;每日给予特立帕肽组大鼠特立帕肽溶液皮下注射,去势组及对照组给予等量的PBS溶液。牙移动第0、7、14、21天处死大鼠、取材并行micro-CT扫描分析。结果:各组从7 d起可开始观察到牙根吸收陷窝,且陷窝体积随时间延长逐渐增大。去势组大鼠的牙根吸收与对照组相比较为严重,特立帕肽治疗可以显著降低骨质疏松大鼠牙移动21 d时的牙根吸收。结论:骨质疏松状态可加重大鼠牙移动过程中的牙根吸收,间歇性应用特立帕肽可以减少骨质疏松大鼠正畸牙移动中的牙根吸收。

大麻素2型受体在加速正畸牙移动中的作用

目的 探讨大麻素2型受体(CB2)在正畸过程中对小鼠正畸牙移动(OTM)速率和压力侧牙周组织改建的作用。方法 筛选CB2^(-/-)和同窝WT型各30只雄性小鼠,6周龄时建立牙齿移动模型,建模时间分别为0、3、7、14、21 d(n=6)后取材,经体视显微镜测量牙移动距离;HE染色观察根压力区牙周组织变化;TRAP染色统计根压力区破骨细胞数量;免疫组织化学染色观察根压力区基质金属蛋白酶-9(MMP-9)阳性单核细胞和多核细胞的数量变化。结果 正畸牙移动距离测量结果显示,在21 d内,随着时间延长,牙齿移动距离逐渐增加,且3、7、14、21 d时CB2^(-/-)组牙齿移动距离均较WT小鼠增加;HE染色显示OTM第14天时CB2^(-/-)小鼠压力区牙周膜间隙宽度大于WT小鼠(P<0.000 1);TRAP染色显示14 d时,在第一磨牙远中根压力区硬骨板处,CB2^(-/-)小鼠的破骨细胞数量大于WT小鼠(P<0.001);MMP-9免疫组织化学染色显示OTM 14 d时,在压力区牙周膜区域,CB2^(-/-)小鼠的MMP-9(+)单核细胞和MMP-9(+)多核细胞数量均大于WT小鼠(P<0.05)。结论 CB2可加速正畸力作用下牙齿移动速率。CB2缺失加速正畸牙移动是通过加速牙移动过程中压力侧骨吸收实现的。

3D导板引导下微创骨皮质切开术辅助正畸治疗骨性Ⅱ类错(牙合)畸形的临床研究

目的:探索三维(three dimensions,3D)打印导板引导的微创骨皮质切开术辅助正畸治疗骨性Ⅱ类错(牙合)畸形的临床效果。方法:选取就诊于我院的24例成人骨性Ⅱ类上颌前突患者,均需拔除上颌双侧第一前磨牙并使用种植体支抗内收上前牙,将其随机分为2组,对照组行常规正畸治疗,研究组在关闭间隙开始时实行3D打印导板引导下的微创骨皮质切开术,术后加力方式同对照组。分别对2组患者软硬组织变化相关指标和临床效果相关指标进行分析和比较。结果:研究组U1-SN(上中切牙长轴与SN连线交角)的变化值为(-1.49±2.18)°,U1-NA(上中切牙长轴与NA连线交角)为(-5.63±3.39)°,NA-Apo(颌突角)为-4.10(-4.60,-2.00)°,U1-Apo(上中切牙突距)为(-3.10±0.95) mm,与对照组相比,差异有统计学意义;研究组关闭拔牙间隙过程中牙齿的每月平均移动距离[(0.90±0.21) mm]显著大于对照组[(0.54±0.15) mm],术后的牙根均未损伤,研究组与对照组治疗后牙根吸收程度、牙周探诊深度均无明显差异。结论:在骨性Ⅱ类的错(牙合)畸形患者掩饰性治疗中,辅助3D打印引导下微创骨皮质切开术可有效实现上颌前牙的整体移动,缩短治疗时间,手术并发症较少,是骨性Ⅱ类患者掩饰性正畸治疗有效的辅助手段。

牙周辅助加速成骨正畸技术在加速正畸牙齿移动中的研究进展

在当代口腔正畸领域,随着成年患者比例的持续增长,传统正畸治疗方法面临新的挑战和需求。这其中,缩短治疗周期和最小化治疗过程中的并发症已成为重要的研究和实践方向。众多尝试加速牙齿移动的技术中,牙周辅助加速成骨正畸(Periodontally accelerated osteogenic orthodontics, PAOO)表现出明显的优势。PAOO不仅在缩短治疗周期方面取得显著成效,而且通过促进牙槽骨增生,有助于牙周组织的长期健康。该技术理论基础主要基于区域加速现象(Regional acceleratory phenomenon, RAP)的骨愈合模式。本文深入探讨了PAOO的手术起源及其技术的历史发展。通过阐述PAOO的研究进展,本文不仅为正畸医师提供了一个全面的改良技术概览,而且为未来的研究和临床实践指出了方向。此外,文章还讨论了PAOO在临床应用中的效果评估、潜在的风险和挑战。通过对PAOO技术的进一步了解,正畸医师可以更好地为成人患者提供高效、安全的治疗方案。