Cone beam computed tomography

锥形束计算机断层扫描
  • 文章类型: Journal Article
    目的:唇腭裂是全球最常见的颅面畸形。牙槽突裂用植骨治疗,4至7岁之间的混合牙列。这是一个重要的步骤,因为它提供了高质量的颌骨,并在裂口侧提供了对嘴唇和翼软骨的更好的支撑。骨自体移植与髂骨收获仍然是最常用的技术,但这并非没有风险。因此,已经描述了同种异体移植技术来降低这种发病率(疼痛,感染风险,出血性风险,骨折风险)。这项研究的目的是评估,同种异体移植一年后,牙槽突裂同种异体骨移植的有效性和巩固性。
    方法:在里昂妇女母婴医院的小儿颅颌面外科进行了一项回顾性研究,法国。
    方法:本系列包括22例患者或25例牙槽突裂骨移植,包括16个男孩和6个女孩,平均年龄为6.1岁。
    方法:通过在术前和术后锥形束计算机断层扫描中评估骨移植物的体积与初始空间的体积之间的比率来量化残余同种异体骨。
    结果:1年同种异体骨残植率为58.5%(±22.3)。
    结论:采用同种异体骨移植的牙槽突裂骨移植可替代自体骨移植以降低供区发病率。
    OBJECTIVE: Cleft lip and palate are the most common craniofacial malformations worldwide. The alveolar cleft is treated with a bone graft, between 4 and 7 years of age in mixed dentition. This is an important step because it provides good quality jawbone and a better support of the lip and the alar cartilage on the side of the cleft. Bone autografting with iliac harvesting remains the most commonly used technique, but it is not without risks. Allograft techniques have therefore been described to reduce this morbidity (pain, infectious risk, hemorrhagic risk, fracture risk). The aim of this study was to evaluate, one year after allografting, the efficiency and consolidation of the bone allograft in the alveolar cleft.
    METHODS: A retrospective study was conducted in the department of pediatric craniomaxillofacial surgery in the Woman-Mother-Child Hospital in Lyon, France.
    METHODS: This series includes 22 patients or 25 alveolar cleft bone grafts, including 16 boys and 6 girls, with an average age of 6.1 years.
    METHODS: Quantify the residual bone allograft by evaluating the ratio between the volume of the bone graft and the volume of the initial space on pre- and post-operative cone beam computed tomography.
    RESULTS: The residual bone allograft percentage at 1 year was 58.5% (± 22.3).
    CONCLUSIONS: Alveolar cleft bone graft with bone allograft is an alternative to iliac autografting to reduce donor site morbidity.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    目标:TMD是一种多方面的疾病,具有多种影响因素,但是翼状体外侧板对TMD发展的实际影响仍不确定。本研究旨在探讨翼状体外侧板(LPP)的解剖变异之间的关系,包括它的角度和与髁的接近度,和颞下颌关节紊乱病(TMD)的患病率,以提高TMD的诊断准确性和治疗方法。
    方法:对年龄在18至45岁的189个锥形束计算机断层扫描(CBCT)图像进行了回顾性分析。纳入标准基于退行性关节病的明确诊断,不包括接受正畸治疗的个人,受伤,或者颅面疾病。使用标准化DC/TMD方案将参与者分为TMD和对照组进行评估。放射科医生,对患者的临床状况视而不见,然后分析CBCT图像。LPP尺寸,angles,使用OnDemand3D成像软件测量髁距。
    结果:研究发现,与男性相比,女性的平均LPP长度具有统计学意义(右LPPp<0,001,左LPPp=0,004),性别之间LPP-髁距离和角度没有显着差异。比较TMD和对照组显示侧板角度和TMJ障碍之间的正相关(p=0.044),暗示了潜在的生物力学联系。
    结论:最后,该研究挑战了LPP解剖学变异显著影响TMD的假设,同时强调了LPP角度与TMD之间的潜在联系.LPP角在TMD中的潜在作用的新见解为研究和临床实践提供了新的方向,强调在TMD的管理中考虑细微的解剖学差异的重要性。
    OBJECTIVE: TMD is a multifaceted condition with various contributing factors, but the actual impact of the lateral pterygoid plate on the development of TMD remains uncertain. This research aims to investigate the relationship between anatomical variations of the lateral pterygoid plate (LPP), including its angle and proximity to the condyle, and the prevalence of temporomandibular disorders (TMD), to improve diagnostic accuracy and therapeutic approaches for TMD.
    METHODS: A retrospective analysis was conducted on 189 Cone Beam Computed Tomography (CBCT) images of individuals aged 18 to 45. Inclusion criteria were based on definitive diagnoses of degenerative joint disease, excluding individuals with orthodontic treatments, injuries, or craniofacial disorders.Participants were divided into TMD and control groups using standardized DC/TMD protocols for assessment. A radiologist, blinded to the patient\'s clinical status, then analyzed the CBCT images. LPP dimensions, angles, and condyle distances were measured using OnDemand 3D Imaging Software.
    RESULTS: The study found a statistically significant higher average LPP length in females compared to males (right LPP p < 0,001, left LPP p = 0,004), with no significant differences in LPP-condyle distances and angles between genders. Comparing the TMD and control groups revealed a positive correlation between lateral plate angles and TMJ disorders (p = 0,044), suggesting a potential biomechanical linkage.
    CONCLUSIONS: Conclusively, the study challenges the assumption that LPP anatomical variations significantly impact TMD while underscoring a potential link between LPP angle and TMD. The novel insight into the potential role of the LPP angle in TMD provides a new direction for research and clinical practice, emphasizing the importance of considering subtle anatomical differences in the management of TMD.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:了解根管形态对于根管治疗的成功至关重要。因此,本研究旨在使用锥形束计算机断层扫描技术在巴基斯坦亚群中评估和分析上颌前磨牙的根管构型。
    方法:这项横断面研究利用了来自两个不同中心的CBCT扫描:卡拉奇的AgaKhan大学和拉合尔的JinnahMRI和身体扫描。使用GALAXIS1.9版(SICATGmbHandCo.KG,波恩,德国),集成在Sirona牙科系统(D-64625Bensheim,德国)。扫描参数标准化为85kV,7mA,15秒的曝光时间和0.16毫米的体素大小。共收集707次CBCT扫描,包括2180个上颌前磨牙。根管配置的分类基于(Ahmed等人。IntEndodJ.2017;50(8):761-70)。使用SPSS版本26进行统计分析,采用卡方检验,显著性水平设定为p<0.05。
    结果:根管形态的分布随年龄和性别的不同而显著变化。在上颌前磨牙中,50%表现出2MPMB1L1的典型构型(两个根,每个颊和舌根的单管),而26%的上颌右第二前磨牙显示1MPM1(一根根,一条运河)。总的来说,1MPM1占第二前磨牙总病例的27.4%。在第一前磨牙(p=0.338)或第二前磨牙(p=0.833)中,年龄与根管分布之间没有统计学上的显着关系。关于性别,在右上颌第一前磨牙的分布上观察到显著差异(p=0.022*),女性患病率较高。
    结论:这项研究为巴基斯坦不同区域亚群上颌前磨牙根管的解剖变异提供了重要的见解。虽然特定的根管构型很普遍,结果表明,年龄与上颌前磨牙根管形态之间无统计学意义的相关性。然而,在右上颌第一前磨牙的分布中观察到明显的性别差异。
    BACKGROUND: Understanding the root canal morphology is essential for the success of root canal treatment. Therefore, this study aimed to evaluate and analyze the root canal configuration of maxillary premolars using Cone Beam Computed Tomography in the Pakistani subpopulation.
    METHODS: This cross-sectional study utilized CBCT scans from two distinct centres: Aga Khan University in Karachi and Jinnah MRI and Body Scans in Lahore. The CBCT images were visualized using GALAXIS version 1.9 (SICAT GmbH and Co. KG, Bonn, Germany), integrated within the Sirona Dental System (D-64625 Bensheim, Germany). The scanning parameters were standardized at 85 kV, 7 mA, with a 15-s exposure time and a voxel size of 0.16 mm. A total of 707 CBCT scans were collected, encompassing 2180 maxillary premolars. Root canal configurations were classified based on (Ahmed et al. Int Endod J. 2017;50(8):761-70). Statistical analyses were performed using SPSS version 26, employing the Chi-square test with a significance level set at p < 0.05.
    RESULTS: The distribution of root canal morphologies varied significantly with age and gender. Among maxillary premolars, 50% exhibited the typical configuration of 2MPMB1 L1 (two roots, single canal in each buccal and lingual root), while 26% of maxillary right second premolars displayed 1MPM1 (one root, one canal). Overall, 1MPM1 accounted for 27.4% of the total cases in the second premolars. There was no statistically significant relationship between age and root canal distribution in either first premolars (p = 0.338) or second premolars (p = 0.833). Regarding gender, a significant difference was observed in the distribution of right maxillary 1st premolars (p = 0.022*), with a higher prevalence among females.
    CONCLUSIONS: This study offers significant insights into the anatomical variations of root canals in maxillary premolars across diverse regional subpopulations in Pakistan. While specific root canal configurations were prevalent, the findings indicate no statistically significant correlation between age and root canal morphology in maxillary premolars. However, a notable gender disparity was observed in the distribution of the right maxillary first premolars.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    患有萎缩性上颌骨的个体的植入手术提出了挑战,特别是关于鼻腔并发症,如穿孔,植入物迁移,和气道阻塞。虽然全景射线照片提供诊断便利,它们的二维性质限制了对解剖结构的评估。锥形束计算机断层扫描(CBCT)提供了三维评估,提高手术计划的准确性,并有可能减少并发症。为了了解全景射线照片和CBCT图像之间的测量差异,这项回顾性研究检查了在2021年9月至2023年12月期间在AhmetKeleoälu牙科学院拍摄的严重萎缩性上颌骨患者的CBCT图像.使用OnDemand3D软件将虚拟植入物放置在各个牙齿区域中。评估了全景X射线照片和CBCT图像之间的鼻腔穿孔发生率和垂直骨高度差异。为此,比较了虚拟植入物放置区域的全景和CBCT图像中的垂直骨长度测量值.统计分析,包括t检验和方差分析,进行是为了确定定量测量之间的显著差异,卡方检验和Bonferroni校正的z检验用于分析比率之间可能的关联。来自59名患者的CBCT数据,总共1888个虚拟植入物,显示牙齿区域之间的植入物深度存在显着差异(F=9.880,p<0.001)。犬科地区显示出较高的穿孔风险,尤其是12毫米和14毫米的植入物。与CBCT测量相比,全景X光片通常高估了犬和第一前磨牙区域的垂直骨高度,这可能导致穿孔风险增加。在萎缩性上颌骨植入手术前使用CBCT进行影像学评估对于预防鼻腔并发症至关重要。全景X光片可能不足以代表三维解剖结构,强调CBCT对准确植入和手术计划的重要性。进一步的研究应该考虑不同的植入物尺寸和品牌,以推广发现。
    Implant surgery in individuals with atrophic maxilla presents challenges, particularly concerning nasal cavity complications such as perforations, implant migration, and airway obstruction. While panoramic radiographs offer diagnostic convenience, their two-dimensional nature limits the evaluation of anatomical structures. Cone beam computed tomography (CBCT) provides a three-dimensional assessment, enhancing surgical planning accuracy and potentially reducing complications. With the aim of understanding the measurement differences between panoramic radiographs and CBCT images, this retrospective study examined CBCT images of patients with severely atrophic maxilla taken between September 2021 and December 2023 at the Ahmet Keleşoğlu Faculty of Dentistry. Virtual implants were placed in various tooth regions using OnDemand3D software. The incidence of nasal cavity perforations and vertical bone height differences between panoramic radiographs and CBCT images were evaluated. For this purpose, vertical bone length measurements in panoramic and CBCT images were compared for the virtual implant placement areas. Statistical analyses, including t-tests and ANOVA, were performed to determine significant differences among quantitative measurements, and a chi square test with Bonferroni corrected z-tests were used for possible associations between ratios. CBCT data from 59 patients, totaling 1888 virtual implants, revealed significant differences in implant depths among tooth regions (F = 9.880, p < 0.001). Canine regions showed higher perforation risks, especially with 12 mm and 14 mm implants. Panoramic radiographs often overestimated vertical bone height in canine and first premolar regions compared to CBCT measurements, which could lead to increased perforation risks. Radiographic evaluations using CBCT prior to implant surgery in atrophic maxilla cases are crucial to prevent nasal cavity complications. Panoramic radiographs may inadequately represent three-dimensional anatomy, underscoring the importance of CBCT for accurate implant placement and surgical planning. Further studies should consider varying implant sizes and brands to generalize findings.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:这项研究旨在确定受影响的上颌犬齿在锥形束计算机断层扫描(CBCT)图像上的位置,为了确定相邻牙齿是否存在吸收,并研究如果存在吸收,受累犬的吸收位置和类型。
    方法:研究对象包括年龄超过14岁的上颌尖牙患者,这些患者由于任何牙齿原因而进行了CBCT检查。根据横向分析与上颌尖牙相邻的牙齿的吸收,垂直,和CBCT上的颊腹部位置。该研究在134例患者的断层扫描图像上评估了162颗上颌尖牙。
    结果:在受影响的相邻牙齿中,中切牙的32.1%,侧切牙的58.0%,19.1%的第一前磨牙显示轻度至重度吸收。中切牙和侧切牙的横向位置与吸收之间的关系,发现中切牙的垂直位置和吸收以及第一前磨牙的颊侧位置和吸收都很重要。上颌尖牙可引起相邻牙齿轻度至重度吸收,尤其是侧切牙。
    结论:因此,我们认为CBCT的详细检查对邻牙吸收的早期诊断至关重要。
    BACKGROUND: This study aims to determine the position of impacted maxillary canines on cone beam computed tomography (CBCT) images, to determine the presence of resorption in adjacent teeth, and to investigate the position and type of resorption of impacted canines if resorption is present.
    METHODS: Patients over 14 years of age with maxillary canine teeth who had CBCT images taken for any dental reason were included in the study. Resorption of teeth adjacent to maxillary canines was analyzed according to transversal, vertical, and buccopalatinal positions on the CBCT. The study evaluated 162 maxillary canine teeth on tomography images of 134 patients.
    RESULTS: Of the affected adjacent teeth, 32.1% of the central incisor, 58.0% of the lateral incisor, and 19.1% of the first premolars showed mild-to-severe resorption. The relationships between transversal position and resorption in the central and lateral incisor, vertical position and resorption in the central incisor and buccopalatinal position and resorption in the first premolars were found to be significant. Maxillary canine teeth can cause mild-to-severe resorption of adjacent teeth, especially lateral incisors.
    CONCLUSIONS: For this reason, we think that a detailed examination with CBCT is essential in the early diagnosis of resorption of adjacent teeth.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    目的:研究锥形束计算机断层扫描(CBCT)扫描中不同正畸托槽和导线产生的伪影。
    方法:使用拔除的人牙和石膏制作两个牙弓。三对包含不同支架的醋酸盐板-金属,陶瓷,和带NiTi夹子的自锁陶瓷-以及控制板(即,没有括号)是准备好的。在CBCT采集期间进行了导线更换(NiTi和钢),用固定的暴露方案进行。选择轴向切片进行三个感兴趣区域的平均灰度值和标准偏差测量(口腔,语言,和牙齿)。通过ANOVA计算并比较不同支架和导线之间的噪声和对比噪声比(CNR),显著性水平为5%。
    结果:总体而言,口腔和牙齿区域主要受到金属和自锁托槽的影响,显示更高的噪音,和较低的CNR(p<0.05)。另一方面,观察到陶瓷支架对图像质量的影响较小(p≥0.05)。舌侧区域在托槽和钢丝组合之间没有表现出表达差异(p≥0.05)。与支架相关的导线的存在并未使图像质量恶化(p≥0.05)。
    结论:结论:金属托槽和自锁托槽比陶瓷托槽有更大的假象表现。该线不影响图像质量。
    结论:在治疗期间要求CBCT扫描时应注意支架的类型,因为金属和自锁托槽可能比陶瓷托槽表现出更大的伪影。
    OBJECTIVE: To investigate artefacts produced by different orthodontic brackets and wires in cone-beam computed tomography (CBCT) scans.
    METHODS: Two dental arches were made using extracted human teeth and plaster. Three pairs of acetate plates containing different brackets - metallic, ceramic, and self-ligating ceramic with NiTi clip - along with a control plate (i.e., without brackets) were prepared. Wire changes (NiTi and steel) were made during CBCT acquisitions, performed with a fixed exposure protocol. Axial slices were selected for mean gray values and standard deviation measurement in three regions of interest (buccal, lingual, and tooth). Noise and contrast-to-noise ratio (CNR) were calculated and compared among the different brackets and wires by ANOVA with a significance level of 5%.
    RESULTS: Overall, the buccal and tooth region were mostly affected by the metallic and self-ligating brackets, showing higher noise, and lower CNR (p < 0.05). On the other hand, less impact of ceramic brackets in the image quality was observed (p ≥ 0.05). The lingual region did not show expressive differences among the brackets and wire combinations (p ≥ 0.05). The presence of wire associated with the brackets did not worsen image quality (p ≥ 0.05).
    CONCLUSIONS: In conclusion, metallic and self-ligating brackets have greater artefact expression than ceramic brackets. The wire did not influence image quality.
    CONCLUSIONS: One should pay attention to the type of brackets when requesting a CBCT scan during treatment, as metallic and self-ligating brackets may express greater artefacts than ceramic brackets.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    由于X射线的潜在有害暴露,对正畸治疗反应的髁突生长研究甚少。为了克服这个限制,在这里,作者提出高分辨率MRI作为CBCT的可行替代方法,用于TMJ的临床3D评估.一名男性受试者接受了MRI和CBCT扫描。通过MATLABR2022a中开发的半自动算法对获得的TMJ的三维重建进行分割和叠加。使用专用的图像分割软件重建髁突几何结构。两个几何参数,即,单髁模型的总体积和表面,从每个DICOM系列(CBCT和MRI)的平均值中选择量化类内和类间变异性。CBCT和3TMRI参考标准模型的最终比较表明,前者在可重复性方面更加稳健,与CBCT相比,后者达到了更高的标准偏差,但这些值在操作者之间相似,且在临床上并不显著.由于目前该技术的分辨率较低,因此在MRI扫描上进行图像重建的固有限制内,这里提出的方法可以被认为是开发未来全自动人工智能算法的核心,由于其巨大的潜力和不同时间和运营商之间令人满意的一致性。
    Due to potentially harmful exposure to X-rays, condylar growth in response to orthodontic treatment is poorly studied. To overcome this limitation, here, the authors have proposed high-resolution MRI as a viable alternative to CBCT for clinical 3D assessment of TMJ. A male subject underwent both MRI and CBCT scans. The obtained three-dimensional reconstructions of the TMJ were segmented and superimposed by a semiautomatic algorithm developed in MATLAB R2022a. The condylar geometries were reconstructed using dedicated software for image segmentation. Two geometrical parameters, i.e., the total volume and surface of the single condyle model, were selected to quantify the intraclass and interclass variability from the mean of each DICOM series (CBCT and MRI). The final comparison between the reference standard model of CBCT and 3T MRI showed that the former was more robust in terms of reproducibility, while the latter reached a higher standard deviation compared to CBCT, but these values were similar between the operators and clinically not significant. Within the inherent limitation of image reconstruction on MRI scans due to the current lower resolution of this technique, the method proposed here could be considered as a nucleus for developing future completely automatic AI algorithms, owing to its great potential and satisfactory consistency among different times and operators.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    OBJECTIVE: This retrospective study explored the incidence of independent distal-lingual root (DLR) in mandibular first molars and the morphologic features of distal furcations through cone beam computed tomography (CBCT) in Beijing population.
    METHODS: A total of 401 CBCT images of both mandibular first molars existed were included. The sex of the patients, the incidence of DLR, the distal root trunk length (DRT), the locations of distal furcation entrance (DFE), and the separation angle of distal furcation (ADF) were recorded.
    RESULTS: The incidence rates of DLR were 33.2% on the subject level and 26.8% on the tooth level. The incidence of DLR was not different between genders but was higher on the right sides. The DRT values were 4.15 mm±1.02 mm. The ADF was 65.56°±11.56°. The DFE was located lingually, and 97.2% DFE was located more apically than buccal/lingual furcations.
    CONCLUSIONS: A high incidence of DLR was found in the Beijing population. The DRT was longer than buccal and lingual sites. The DFE was located lingually with a wide separation. Understanding the morphological features of distal furcation can help clinicians to make proper treatment plans.
    目的: 通过对锥形束CT(CBCT)图像进行回顾性研究,探究北京地区人群下颌第一磨牙独立远中舌根的发生率以及远中根分叉区的形态特征,为牙周诊疗提供依据。方法: 选取有双侧下颌第一磨牙存在的CBCT资料共401例,记录患者性别、是否存在独立远中舌根,统计其发生率。在存在远中根分叉的下颌第一磨牙CBCT图像中,测量并记录远中根分叉的根柱长度、远中根分叉开口的位置以及远中根分叉开口的角度。结果: 在401例CBCT图像资料中,下颌第一磨牙独立远中舌根的发生率在个体水平为33.2%,牙水平为26.8%。不同性别发生率无差异,右侧发生率更高。远中根柱长度为4.15 mm±1.02 mm,位置均偏舌侧,远中根分叉开口的角度为65.56°±11.56°,97.2%的远中根分叉开口较颊舌侧根分叉开口更偏根方。结论: 北京地区人群有较高的下颌第一磨牙远中舌根的发生率。下颌第一磨牙的远中根柱较颊舌侧根柱更长,根分叉开口位置偏舌侧,分叉角度较大。了解远中根分叉的形态有利于临床医师制定完善的诊疗方案。.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    目的:本研究旨在评估牙周受损的磨牙拔除部位的微牙瓣-牙槽脊保留(MCF-ARP)和自然愈合(NH)后的硬软组织轮廓变化,并分析可行性和在种植治疗期间需要进行骨增强。
    方法:将56名70个部位的患者随机分为两组,分为两组(35个部位来自试验组31名患者,35个部位来自对照组29名患者)。其中,4名患者为对照组贡献一颗牙齿,为试验组贡献一颗牙齿。在拔牙前和手术后6个月使用锥形束计算机断层扫描测量硬组织指标。使用手术前和手术后立即以及手术后2周和1、3和6个月进行的口内扫描评估软组织轮廓变化。
    结果:手术后六个月,MCF-ARP组显示颊骨高度吸收较少(p=.032),中央骨高度(p=.001)和骨脊宽度(p=.009)增加较大.意思是,MCF-ARP组颊软组织轮廓的垂直和水平塌陷为0.95mm(p=.010),比NH组小0.61mm(p=.019)和0.56mm(p=.013),分别。MCF-ARP组的位点明显少于NH组(0%vs.26.7%),在MCF-ARP组中,与NH组相比,可以通过简单的植入手术治疗的部位更多(71.9%vs.56.6%)。
    结论:与NH相比,MCF-ARP减少了牙周受损的磨牙拔除部位的骨吸收,并保持了颊软组织轮廓。MCF-ARP减少了植入物治疗中复杂的骨增强程序的需要。
    背景:中国临床试验注册中心(ChiCTR)ChiCTR2200056335.2022年2月4日注册,版本1.0。
    OBJECTIVE: This study aimed to assess hard and soft tissue contour changes following micro crestal flap-alveolar ridge preservation (MCF-ARP) and natural healing (NH) in periodontally compromised molar extraction sites and to analyse the feasibility and need for bone augmentation during implant therapy.
    METHODS: Fifty-six patients with 70 sites were randomized into two groups at the site level (35 sites from 31 patients in the test group and 35 sites from 29 patients in the control group). Among whom, four patients contributed one tooth to the control group and one tooth to the test group. Hard tissue indicators were measured using cone beam computed tomography performed before tooth extraction and 6 months after surgery. Soft tissue contour changes were assessed using intraoral scanning performed before and immediately after surgery and also 2 weeks and 1, 3 and 6 months after surgery.
    RESULTS: Six months after surgery, the MCF-ARP group showed less resorption in buccal bone height (p = .032) and greater augmentation in central bone height (p = .001) and ridge width (p = .009). The mean, vertical and horizontal collapse of buccal soft tissue contour in the MCF-ARP group were 0.95 mm (p = .010), 0.61 mm (p = .019) and 0.56 mm (p = .013) less than that in the NH group, respectively. There were significantly (p = .007) fewer sites in the MCF-ARP group than in the NH group (0% vs. 26.7%) for staged bone augmentation and more sites that could be treated with simple implant procedure in the MCF-ARP group than in the NH group (71.9% vs. 56.6%).
    CONCLUSIONS: Compared with NH, MCF-ARP reduced bone resorption in periodontally compromised molar extraction sites and maintained the buccal soft tissue contour. MCF-ARP reduces the need for complex bone augmentation procedures in implant therapy.
    BACKGROUND: Chinese Clinical Trial Register (ChiCTR) ChiCTR2200056335. Registered on 4 February 2022, Version 1.0.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    本研究基于锥形束计算机断层扫描(CBCT)图像调查了伊朗人群中上颌受累犬齿位置与上颌形态特征之间的关联。
    在这项横断面描述性分析研究中,检查了47张单侧颊受累上颌犬的CBCT图像和47张单侧腭受累上颌犬的CBCT图像。比较了受影响侧和未受影响侧之间的几种形态变量,在颊嵌塞和腭嵌塞类型之间。
    性别和年龄与犬类嵌塞类型无显著相关。受影响侧的牙槽骨高度在口腔受影响组明显大于在腭受影响组(p=0.016)。在比较受影响和未受影响的侧面时,深度为2mm的牙槽骨厚度的所有变量,上颌弓宽度,在口腔和腭受累组中,腭体积在受累侧的值明显较小(p<0.05)。颊组受累侧的牙槽骨在10mm深度处明显较厚(p=0.024)。颊组受累侧的上颌弓周长明显较小(p=0.008)。两组之间的腭深度没有显着差异。
    在研究的变量中,牙槽骨厚度在不同深度表现出相反的结果。颊部组和腭部组的上颌骨体积和上颌弓宽度在受影响侧明显较小。足弓周长仅在颊组显示相同的结果。
    UNASSIGNED: This study investigated the association between the maxillary impacted canines\' position and the maxilla\'s morphological features in an Iranian population based on cone-beam computed tomography (CBCT) images.
    UNASSIGNED: In this cross-sectional descriptive-analytical study, 47 CBCT images of unilateral buccally impacted maxillary canines and 47 CBCT images of unilateral palatally impacted maxillary canines were examined. Several morphological variables were compared between the impacted and non-impacted sides, and between the buccal and palatal impaction types.
    UNASSIGNED: Gender and age were not significantly associated with the canine impaction type. The alveolar bone height at the impacted side was significantly greater in the buccally impacted group than in the palatally impacted group (p = 0.016). In a comparison of the impacted and non-impacted sides, all variables of alveolar bone thickness at depth of 2 mm, maxillary arch width, and palatal volume had significantly smaller values in the impacted side in both buccally and palatally impacted groups (p < 0.05). The alveolar bone was significantly thicker at the depth of 10 mm in the impacted side of the buccal group (p = 0.024). The maxillary arch perimeter was significantly smaller in the impacted side of the buccal group (p = 0.008). The palatal depth did not significantly differ between the groups.
    UNASSIGNED: Among the studied variables, the alveolar bone thickness showed contrary results at different depths. The palatal volume and maxillary arch width were significantly smaller on the impacted side in both buccal and palatal groups, and the arch perimeter showed the same results only in the buccal group.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

公众号