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Content analysis of AI-generated (ChatGPT) responses concerning orthodontic clear aligners. 对人工智能生成的有关正畸透明矫治器的回复(ChatGPT)进行内容分析。
Pub Date : 2024-05-01 DOI: 10.2319/071123-484.1
Sarah Abu Arqub, Dalya Al-Moghrabi, Veerasathpurush Allareddy, Madhur Upadhyay, Nikhilesh Vaid, Sumit Yadav

Objectives: To assess the accuracy of ChatGPT answers concerning orthodontic clear aligners.

Materials and methods: A cross-sectional content analysis of ChatGPT generated responses to queries related to clear aligner treatment (CAT) was undertaken. A total of 111 questions were generated by three orthodontists based on a set of predefined domains and subdomains. The artificial intelligence (AI)-generated (ChatGPT) answers were extracted and their accuracy was determined independently by five orthodontists. The accuracy of answers was assessed using a prepiloted four-point scale scoring rubric. Descriptive statistics were performed.

Results: The total mean accuracy score for the entire set was 2.6 ± 1.1. It was noted that 58% of the AI-generated answers were scored as objectively true, 18% were selected facts, 9% were minimal facts, and 15% were false. False claims included the ability of CAT to reduce the need for orthognathic surgery (4.0 ± 0.0), improve airway function (3.8 ± 0.5), achieve root parallelism (3.6 ± 0.5), alleviate sleep apnea (3.8 ± 0.5), and produce more stable results compared to fixed appliances (3.8 ± 0.5).

Conclusions: The overall level of accuracy of ChatGPT responses to questions concerning CAT was suboptimal and lacked citations to relevant literature. Ability of the software to offer current and precise information was limited. Therefore, clinicians and patients must be mindful of false claims and relevant facts omitted in the answers generated by ChatGPT.

目的: 评估 ChatGPT 有关正畸透明矫治器答案的准确性:评估 ChatGPT 有关透明牙齿矫正器的回答的准确性:对 ChatGPT 生成的有关透明矫治器治疗(CAT)询问的回复进行横向内容分析。三名正畸医生根据一组预定义的领域和子领域共生成了 111 个问题。人工智能(AI)生成的(ChatGPT)答案被提取出来,其准确性由五名正畸学家独立确定。答案的准确性采用预先拟定的四点评分标准进行评估。对结果进行了描述性统计:整组答案的总平均准确率为 2.6 ± 1.1。我们注意到,人工智能生成的答案中有 58% 被评为客观真实,18% 被评为选定事实,9% 被评为最小事实,15% 被评为错误。虚假说法包括 CAT 能够减少正颌外科手术的需要(4.0 ± 0.0)、改善气道功能(3.8 ± 0.5)、实现牙根平行(3.6 ± 0.5)、缓解睡眠呼吸暂停(3.8 ± 0.5)以及与固定矫治器相比产生更稳定的效果(3.8 ± 0.5):ChatGPT 对有关 CAT 问题的回答总体上不够准确,而且缺乏对相关文献的引用。软件提供最新和准确信息的能力有限。因此,临床医生和患者必须注意 ChatGPT 生成的答案中的虚假说法和遗漏的相关事实。
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引用次数: 0
Variability associated with maxillary infrazygomatic crest and palatal bone width, height, and angulation in subjects with different vertical facial growth types: a retrospective cone-beam computed tomography study. 面部垂直生长类型不同的受试者上颌骨下颧嵴和腭骨宽度、高度和角度的相关变异性:一项锥形束计算机断层扫描回顾性研究。
Pub Date : 2024-05-01 DOI: 10.2319/062023-430.1
Bhumika Patel, Jessica De Rose, Jansen Nash, Michael Sekula, Carl Gioia, Toru Deguchi, Sudha Gudhimella, Vaibhav Gandhi

Objectives: To assess the infrazygomatic crest (IZC) and palatal bone width, height, and angulation in patients with different vertical facial growth types as potential miniscrew insertion sites.

Materials and methods: In this retrospective cone-beam computed tomography study, 162 subjects (81 males and 81 females, mean age 16.05 ± 0.65 years) were included. They were divided into three groups (hypodivergent, normodivergent, and hyperdivergent) based on the Frankfort mandibular plane angle. Ten buccal bone measurements were made at two different coronal sections: maxillary first molar mesiobuccal and distobuccal roots (bilaterally). Six palatal bone measurements were made on a sagittal section at the maxillary central incisors (bilaterally). A total of 32 measurements per subject were considered in the study.

Results: No significant difference was observed for the IZC (width and angle) at the maxillary first molar mesiobuccal root. A comparison of normodivergent and hyperdivergent groups for buccal width at the distobuccal root of the first molar showed significant differences. Palatal bone thickness at the level of 2 mm distal to the apex of the central incisor was significantly higher for the hyperdivergent group (10.43 mm) compared with the normodivergent (7.58 mm) and hypodivergent groups (7.83 mm).

Conclusions: Hyperdivergent subjects tend to present a longer and deeper IZC and increased palatal bone thickness compared with other groups. The recommended insertion angle for the IZC mini-implant at 3 mm from the alveolar crest should be between 75.5° and 77°.

目的:评估颧骨下嵴(IZC)和腭骨的宽度、高度和角度:评估不同面部垂直生长类型患者的颧骨下嵴(IZC)和腭骨宽度、高度和角度,作为潜在的微型螺钉插入部位:在这项回顾性锥形束计算机断层扫描研究中,共纳入了 162 名受试者(81 名男性和 81 名女性,平均年龄为 16.05 ± 0.65 岁)。根据法兰克福下颌平面角度将他们分为三组(低发散、正常发散和高发散)。在两个不同的冠状切面进行了十次颊骨测量:上颌第一磨牙中颊根和远颊根(双侧)。在上颌中切牙(双侧)的矢状切面上进行了六次腭骨测量。研究共对每个受试者进行了 32 次测量:结果:上颌第一磨牙中颊面根部的 IZC(宽度和角度)无明显差异。在第一磨牙远颊面根部的颊面宽度方面,正常分化组和过度分化组的比较显示出显著差异。与正常发散组(7.58 毫米)和低发散组(7.83 毫米)相比,超发散组距中切牙先端远端 2 毫米处的腭骨厚度(10.43 毫米)明显更高:结论:与其他组别相比,超发散受试者的 IZC 更长、更深,腭骨厚度增加。建议IZC微型种植体在距牙槽嵴3毫米处的插入角度应在75.5°和77°之间。
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引用次数: 0
An in vitro comparison of the dimensional stability of four 3D-printed models under various storage conditions. 体外比较四种 3D 打印模型在不同储存条件下的尺寸稳定性。
Pub Date : 2024-05-01 DOI: 10.2319/081223-557.1
Vanessa Knode, Björn Ludwig, Sinan Hamadeh, Nikolaos Pandis, Padhraig S Fleming

Objectives: To investigate the dimensional stability of various 3D-printed models derived from resin and plant-based, biodegradable plastics (PLA) under specific storage conditions for a period of up to 21 weeks.

Materials and methods: Four different printing materials, including Draft V2, study model 2, and Ortho model OD01 resins as well as PLA mineral, were evaluated over a 21-week period. Eighty 3D-printed models were divided equally into two groups, with one group stored in darkness and the other exposed to daylight. All models were stored at a constant room temperature (20°C). Measurements were taken at 7-week intervals using the Inspect 3D module in OnyxCeph software (Image Instruments GmbH, Chemnitz, Germany).

Results: Dimensional change was noted for all of the models with shrinkage of up to 0.26 mm over the study period. Most contraction occured from baseline to T1, although significant further contraction also arose from T1 to T2 (P < .001) and T1 to T3 (P < .001). More shrinkage was observed when exposed to daylight overall and for each resin type (P < .01). The least shrinkage was noted with Ortho model OD01 resin (0.16 mm, SD = 0.06), and the highest level of shrinkage was observed for Draft V2 resin (0.23 mm, SD = 0.06; P < .001).

Conclusions: Shrinkage of 3D-printed models is pervasive, arising regardless of the material used (PLA or resin) and being independent of the brand or storage conditions. Consequently, immediate utilization of 3D printing for orthodontic appliance purposes may be preferable, with prolonged storage risking the manufacture of inaccurate orthodontic retainers and appliances.

目的:研究树脂和植物基可降解塑料(PLA)制成的各种三维打印模型在特定储存条件下长达 21 周的尺寸稳定性:研究由树脂和植物基生物降解塑料(PLA)制成的各种三维打印模型在特定储存条件下长达 21 周的尺寸稳定性:对四种不同的打印材料(包括 Draft V2、研究模型 2 和 Ortho 模型 OD01 树脂以及聚乳酸矿物)进行了为期 21 周的评估。80 个三维打印模型被平均分成两组,一组在黑暗中保存,另一组暴露在日光下。所有模型都存放在恒定的室温(20°C)下。使用 OnyxCeph 软件(Image Instruments GmbH,德国开姆尼茨)中的 Inspect 3D 模块每隔 7 周进行一次测量:结果:所有模型的尺寸都发生了变化,在研究期间收缩达 0.26 毫米。大部分收缩发生在基线至 T1 期,但 T1 至 T2 期(P < .001)和 T1 至 T3 期(P < .001)也出现了显著的进一步收缩。总体而言,暴露在日光下的收缩率更高,每种树脂类型的收缩率也更高(P < .01)。Ortho 模型 OD01 树脂的收缩程度最小(0.16 毫米,SD = 0.06),Draft V2 树脂的收缩程度最大(0.23 毫米,SD = 0.06;P < .001):结论:三维打印模型的收缩是普遍现象,无论使用哪种材料(聚乳酸或树脂)都会产生收缩,而且与品牌或储存条件无关。因此,最好立即将三维打印技术用于正畸矫治器的制作,而长期储存则有可能导致制作出不准确的正畸保持器和矫治器。
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引用次数: 0
An evaluation of root resorption associated with the use of photobiomodulation during orthodontic treatment with clear aligners: a retrospective cohort pilot study. 评估透明矫治器正畸治疗过程中使用光生物调节相关的牙根吸收:一项回顾性队列试点研究。
Pub Date : 2024-05-01 DOI: 10.2319/081823-567.1
Antonio Rossi, Manuel Lagravère-Vich, Giseon Heo, Paul W Major, Tarek El-Bialy

Objectives: To evaluate the change in tooth root volume using cone-beam computed tomography (CBCT) in a group of patients treated concurrently with clear aligners and an adjunctive photobiomodulation (PBM) device.

Materials and methods: This retrospective cohort pilot study included the records of 32 consecutively treated clear aligner patients (23 female, 9 male) from the private practice of one orthodontist. The PBM group (n = 16) used the device once per day for 5 minutes per arch and was compared with a matched control group (n = 16). A semiautomated segmentation technique was used to obtain tooth volume of anterior teeth from CBCT imaging prior to (T0) and during or immediately following (T1) orthodontic treatment with clear aligners. The change in root volume between time points was assessed.

Results: There was no statistically significant difference between the pre- and posttreatment root volumes of maxillary and mandibular anterior teeth, regardless of which intervention group the patient belonged to (P > .05). There was also no difference in the mean percentage change in root volume between clear aligner patients in this study who were treated with the PBM device compared with a matched control group (P > .05).

Conclusions: Clear aligner patients in this study who changed their aligners every 3 to 5 days and used adjunctive photobiomodulation therapy did not experience clinically relevant orthodontically induced external root resorption. Due to the small sample size and measurement error in the root segmentation process, the results should be interpreted with caution.

目的使用锥束计算机断层扫描(CBCT)评估一组同时接受透明矫治器和辅助光生物调制(PBM)装置治疗的患者牙根体积的变化:这项回顾性队列试点研究包括一名正畸医生私人诊所中32名连续接受透明矫治器治疗的患者(23名女性,9名男性)的记录。PBM组(16人)每天使用一次该装置,每弓5分钟,并与匹配对照组(16人)进行比较。在使用透明矫治器进行正畸治疗之前(T0)、期间或紧随其后(T1),采用半自动分割技术从 CBCT 成像中获取前牙的牙量。评估了不同时间点之间牙根体积的变化:结果:无论患者属于哪个干预组,治疗前和治疗后上颌和下颌前牙牙根体积的差异均无统计学意义(P > .05)。本研究中使用PBM装置治疗的透明矫治器患者与匹配对照组相比,牙根体积变化的平均百分比也没有差异(P > .05):结论:在这项研究中,每 3 到 5 天更换一次矫治器并使用辅助光生物调节疗法的透明矫治器患者不会出现临床相关的正畸诱发的外牙根吸收。由于样本量较小,且牙根分割过程中存在测量误差,因此在解释结果时应谨慎。
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引用次数: 0
Friction and wear behavior of a mechanical oscillating strip system used for interproximal enamel reduction: a quantitative and qualitative scanning electronic microscope evaluation. 用于近端釉质间磨削的机械振荡带系统的摩擦和磨损行为:扫描电子显微镜的定量和定性评估。
Pub Date : 2024-05-01 DOI: 10.2319/083023-590.1
Francesca Gazzani, Denise Bellisario, Laura Fazi, Alessia Balboni, Silvia Licoccia, Chiara Pavoni, Paola Cozza, Roberta Lione

Objectives: To evaluate wear and friction properties of oscillating strips in order to validate the importance of a standardized interproximal enamel reduction (IPR) sequence to preserve their efficiency and lifetime.

Materials and methods: Fifteen complete oscillating IPR sequences were tested by means of tribological tests (Linear Reciprocating Tribometer, C.S.M. Instruments, Peseaux, Switzerland). Fifteen single 0.2-mm metallic strips underwent a long continuous cycle of 240 minutes. Strip surface roughness and waviness measurements were assessed by means of a contact probe surface profiler (TalySurf CLI 2000; Taylor Hobson, Leicester, UK) and TayMap software. Statistical analysis was performed with independent-samples t-test. Significance was at the P < .05 level. Scanning electronic microscopy analysis of strip surfaces was conducted with an FEI Quanta 200 (Hillsboro, Ore) in high vacuum at 30.00 kV.

Results: Resin strips revealed a significant reduction in surface roughness (Ra, Rt, RDq) and a significant increase in waviness parameters (Wa, Wt). Rt and RDq values significantly decreased upon use of the metallic strips. Significantly higher values of Wa (+ 2.84 µm) and Wt (+0.1 µm) were observed only for the 0.2-mm metallic strips. Higher friction values were observed when the metallic strips were tested singularly rather than within the entire sequence. Lower Ra and Rt values were revealed when 0.2-mm metallic strips were tested up to 240 minutes.

Conclusions: The application of a standardized oscillating sequence allows for more efficient wear performance of the strips with a significant impact on their abrasive power and lifetime.

目的评估摆动条的磨损和摩擦特性,以验证标准化的近端釉质间磨削(IPR)序列对保持其效率和使用寿命的重要性:通过摩擦学测试(线性往复摩擦仪,C.S.M. Instruments, Peseaux, Switzerland)对 15 个完整的摆动式 IPR 序列进行了测试。15 个 0.2 毫米的单个金属带经过 240 分钟的长时间连续循环。通过接触探针表面轮廓仪 (TalySurf CLI 2000; Taylor Hobson, Leicester, UK) 和 TayMap 软件对带材表面粗糙度和波纹度进行测量。统计分析采用独立样本 t 检验。显著性水平为 P < .05。使用 FEI Quanta 200 (Hillsboro, Ore) 在 30.00 kV 的高真空条件下对带材表面进行扫描电子显微镜分析:结果:树脂带材的表面粗糙度(Ra、Rt、RDq)明显降低,波状参数(Wa、Wt)明显增加。使用金属带后,Rt 和 RDq 值明显下降。只有 0.2 毫米的金属带的 Wa 值(+ 2.84 微米)和 Wt 值(+ 0.1 微米)明显增加。在对金属带进行单个测试而不是整个序列测试时,可以观察到更高的摩擦值。当 0.2 毫米金属带的测试时间长达 240 分钟时,Ra 和 Rt 值较低:结论:采用标准化的摆动序列可提高金属带的磨损性能,对其磨蚀力和使用寿命有显著影响。
{"title":"Friction and wear behavior of a mechanical oscillating strip system used for interproximal enamel reduction: a quantitative and qualitative scanning electronic microscope evaluation.","authors":"Francesca Gazzani, Denise Bellisario, Laura Fazi, Alessia Balboni, Silvia Licoccia, Chiara Pavoni, Paola Cozza, Roberta Lione","doi":"10.2319/083023-590.1","DOIUrl":"10.2319/083023-590.1","url":null,"abstract":"<p><strong>Objectives: </strong>To evaluate wear and friction properties of oscillating strips in order to validate the importance of a standardized interproximal enamel reduction (IPR) sequence to preserve their efficiency and lifetime.</p><p><strong>Materials and methods: </strong>Fifteen complete oscillating IPR sequences were tested by means of tribological tests (Linear Reciprocating Tribometer, C.S.M. Instruments, Peseaux, Switzerland). Fifteen single 0.2-mm metallic strips underwent a long continuous cycle of 240 minutes. Strip surface roughness and waviness measurements were assessed by means of a contact probe surface profiler (TalySurf CLI 2000; Taylor Hobson, Leicester, UK) and TayMap software. Statistical analysis was performed with independent-samples t-test. Significance was at the P < .05 level. Scanning electronic microscopy analysis of strip surfaces was conducted with an FEI Quanta 200 (Hillsboro, Ore) in high vacuum at 30.00 kV.</p><p><strong>Results: </strong>Resin strips revealed a significant reduction in surface roughness (Ra, Rt, RDq) and a significant increase in waviness parameters (Wa, Wt). Rt and RDq values significantly decreased upon use of the metallic strips. Significantly higher values of Wa (+ 2.84 µm) and Wt (+0.1 µm) were observed only for the 0.2-mm metallic strips. Higher friction values were observed when the metallic strips were tested singularly rather than within the entire sequence. Lower Ra and Rt values were revealed when 0.2-mm metallic strips were tested up to 240 minutes.</p><p><strong>Conclusions: </strong>The application of a standardized oscillating sequence allows for more efficient wear performance of the strips with a significant impact on their abrasive power and lifetime.</p>","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"336-345"},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11050454/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combined distalization and lingual cortex remodeling during mandibular growth for facial profile improvement: a case report. 下颌骨生长过程中联合远端化和舌皮质重塑以改善面部轮廓:1例报告。
Pub Date : 2024-05-01 DOI: 10.2319/060123-390.1
Hai-Van Giap, Ji Yoon Jeon, Joo-Hee Chun, Kee-Joon Lee

Borderline crowding poses a challenge in deciding whether or not to prescribe premolar extraction. This case report describes the two-phase nonextraction orthodontic treatment of an 11-year-old girl with a hyperdivergent skeletal Class I pattern exhibiting anterior crowding and moderate lip protrusion. The initial phase of treatment included maxillary and mandibular expansion to correct the transverse discrepancy as an early intervention. Subsequently, comprehensive treatment was initiated at the age of 13 years, with fully erupted permanent second molars and growth potential remaining. Phase II treatment involved a second round of maxillary expansion, followed by simultaneous bimaxillary total arch intrusive distalization, using interradicular, temporary skeletal anchorage devices to correct dental crowding and improve the facial profile. Although the limited retromolar space posed a challenge to mandibular tooth distalization, gradual bone remodeling was observed in the lingual cortex of the mandibular body, enabling sufficient orthodontic tooth movement without noticeable side effects. After 4 years 3 months of treatment, her dental crowding was relieved, with significant improvement in the facial profile and proper occlusion. The treatment outcomes remained stable 2 years 4 months after retention.

边缘拥挤对决定是否进行前磨牙拔除提出了挑战。本病例报告描述了一名11岁女孩的两阶段非拔牙正畸治疗,她患有I类骨骼超发散型,表现为前侧拥挤和中度嘴唇突出。治疗的初始阶段包括上颌和下颌骨扩张以纠正横向差异作为早期干预。随后,在13岁时开始综合治疗,第二恒磨牙完全萌出并保留生长潜力。II期治疗包括第二轮上颌扩张,随后同时进行双上颌全弓侵入远端,使用根间临时骨骼锚固装置来纠正牙齿拥挤并改善面部轮廓。虽然有限的后磨牙空间对下颌牙齿的远端化构成了挑战,但在下颌体舌皮质中观察到逐渐的骨重塑,使正畸牙齿能够充分移动而没有明显的副作用。经过4年3个月的治疗,患者的牙齿拥挤得到缓解,面部轮廓和咬合有明显改善。留置后2年4个月,治疗结果保持稳定。
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引用次数: 0
Effects of transpalatal arch wire dimension and temporary skeletal anchorage device position on maxillary molar intrusion 腭侧弓丝尺寸和临时骨骼锚定装置位置对上颌磨牙内陷的影响
Pub Date : 2024-04-22 DOI: 10.2319/102423-721.1
Xiaoting Wang, Yi-chen Zhao, Mingyue Fan, Ting Zhou, Bing Fang, Niansong Ye
To investigate the effects of transpalatal (TPA) wire dimension and temporary skeletal anchorage device (TSAD) position on maxillary molar intrusion. The maxillary molar intrusion measurement system included a maxillary acrylic model, TPA, TSADs, and a three-dimensional Force/Moment (F/M) sensor. The intrusion patterns were categorized into six groups: buccal-mesial, buccal-distal, buccal-mesiodistal, palatal-mesial, palatal-distal, and palatal-mesiodistal. TPA wire dimensions were designed to be 0.7 mm, 0.9 mm, and 1.2 mm. The force and moment loads of the maxillary first molar were measured by the F/M sensor. Single buccal or palatal TSADs induced torquing movement, and single mesial or distal TSADs tended to promote tipping movement. Mesiodistal TSADs would have eliminated tipping, but accentuated torquing movement. The TPA significantly reduced the force and moment experienced by the maxillary first molar along three-dimensional axes. The thicker the TPA wire, the smaller the force and moment to which the maxillary first molar was subjected. Precise placement of TSADs might have a substantial influence on tooth movement and should be determined in accordance with specific clinical requirements. Increasing the TPA wire dimension could diminish the tipping, torquing, and rotation during TSAD-assisted maxillary molar intrusion, but these tendencies could not be completely eliminated.
研究经腭裂(TPA)钢丝尺寸和临时骨骼锚定装置(TSAD)位置对上颌臼齿内陷的影响。 上颌臼齿内侵测量系统包括上颌丙烯酸模型、TPA、TSAD 和三维力/力矩(F/M)传感器。入侵模式分为六组:颊-颊面、颊-远侧、颊-密-密侧、腭-颊面、腭-远侧和腭-密-密侧。TPA 线的尺寸设计为 0.7 毫米、0.9 毫米和 1.2 毫米。上颌第一磨牙的力和力矩载荷由 F/M 传感器测量。 单个颊侧或腭侧 TSAD 引起扭转运动,而单个中侧或远侧 TSAD 则倾向于促进倾翻运动。中侧 TSAD 可消除倾倒,但会加剧扭转运动。TPA 能明显减少上颌第一磨牙沿三维轴线所受的力和力矩。TPA 金丝越粗,上颌第一磨牙受到的力和力矩就越小。 TSAD的精确放置可能会对牙齿移动产生重大影响,因此应根据具体的临床要求来确定。增加TPA钢丝的尺寸可以减少TSAD辅助上颌臼齿固位过程中的倾倒、扭转和旋转,但这些趋势并不能完全消除。
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引用次数: 0
Correlation between oral cavity volume and upper airway changes in skeletal Class III patients undergoing bimaxillary orthognathic surgery: a pilot cone-beam computed tomography study 接受双颌正颌手术的骨骼Ⅲ级患者口腔容积与上气道变化之间的相关性:锥束计算机断层扫描试验研究
Pub Date : 2024-04-22 DOI: 10.2319/112223-774.1
Gen Li, Zhenwei Chen, Yingyi Li, Guanhui Cai, Xiaolei Ruan, Ting Wang, Zhaolan Guan, Lian Sun, Wei Wang, Wen Sun, Hua Wang
To evaluate changes of the upper airway and oral cavity volumes in patients with skeletal Class III malocclusion undergoing bimaxillary orthognathic surgery, and to analyze the correlation between postoperative upper airway decrease and the amount of jaw movement and oral cavity volume reduction. Thirty patients (16 males and 14 females) undergoing bimaxillary surgery were included. Three-dimensional reconstruction of the upper airway and oral cavity were performed using preoperative (T0) and postoperative (T1) (6 months) cone-beam computed tomography scans. The volume, sagittal area and minimum cross-sectional area of the upper airway were diminished (P < .001). The decrease in volume and minimum cross-sectional area in the oropharyngeal region of the upper airway were weakly correlated with B-point posterior movement (P < .05). Total oral cavity volume was decreased, with maxillary oral volume increasing and mandibular oral volume decreasing (P < .001). Upper airway decrease was highly correlated with total oral volume reduction and mandibular oral volume reduction, with the most significant correlation being with total oral volume reduction (P < .001). Class III bimaxillary surgery reduced the volume, sagittal area, and minimum cross-sectional area of the upper airway as well as oral cavity volume. Upper airway changes were weakly correlated with anterior-posterior mandibular movement but significantly correlated with oral cavity volume changes. Thus, oral cavity volume reduction is a crucial factor of upper airway decrease in patients with skeletal Class III malocclusion undergoing bimaxillary orthognathic surgery.
目的:评估接受双颌正畸手术的骨骼Ⅲ类错颌畸形患者上气道和口腔容积的变化,分析术后上气道缩小与下颌运动量和口腔容积缩小之间的相关性。 研究纳入了 30 名接受双颌手术的患者(男 16 名,女 14 名)。使用术前(T0)和术后(T1)(6 个月)锥束计算机断层扫描对上气道和口腔进行三维重建。 上气道的体积、矢状面积和最小横截面积均有所缩小(P < .001)。上气道口咽部容积和最小横截面积的减少与 B 点后移呈弱相关(P < .05)。口腔总容积减少,上颌口腔容积增加,下颌口腔容积减少(P < .001)。上气道缩小与口腔总容积缩小和下颌口腔容积缩小高度相关,其中与口腔总容积缩小的相关性最为显著(P < .001)。 III 类双颌手术减少了上气道的容积、矢状面积和最小横截面积以及口腔容积。上气道的变化与下颌骨前后移动的相关性较弱,但与口腔容积的变化明显相关。因此,对于接受双颌正颌手术的骨骼Ⅲ类错颌畸形患者来说,口腔容积缩小是上气道缩小的关键因素。
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引用次数: 0
Changes in the upper airway and its surrounding structures after bimaxillary surgery in patients with cleft-related Class III deformity 唇裂相关 III 级畸形患者接受双颌手术后上气道及其周围结构的变化
Pub Date : 2024-04-22 DOI: 10.2319/082523-579.1
Chung-Yi Ho, Ting-Chen Lu, Y. Hsieh, Chun-Shin Chang, Ying-An Chen, Yu-Fang Liao
To compare upper airway changes following bimaxillary surgery for correction of Class III deformity between patients with unilateral cleft lip and palate (UCLP) and bilateral cleft lip and palate (BCLP) and to compare the preoperative and postoperative upper airway among patients with UCLP and BCLP to healthy controls. Sixty adults with CLP-related skeletal Class III deformity (30 UCLP and 30 BCLP) who consecutively underwent bimaxillary surgery were studied retrospectively. Cone-beam computed tomography (CBCT) was performed before and after surgery to measure upper airway and movements of facial skeletal and surrounding structures. CBCT images from 30 noncleft skeletal Class I adults, matched by age, gender, and body mass index and without surgical intervention, served as controls. After surgery, the volume of the nasopharynx increased in patients with CLP (both P < .001). Patients with CLP did not differ from controls in postoperative volume of the nasopharynx or oropharynx. However, the nasal cavity differed significantly between patients with CLP and controls (P < .001). After bimaxillary surgery, the nasal cavity of patients with CLP differed significantly compared with the controls. Volumes of the nasopharynx and oropharynx did not differ between patients with CLP after surgery and controls.
目的:比较单侧唇腭裂(UCLP)和双侧唇腭裂(BCLP)患者在接受双颌手术矫正 III 级畸形后上呼吸道的变化,并将 UCLP 和 BCLP 患者术前和术后上呼吸道的情况与健康对照组进行比较。 研究人员对连续接受双颌手术的 60 名与 CLP 相关的骨骼 III 级畸形成人(30 名 UCLP 和 30 名 BCLP)进行了回顾性研究。手术前后均进行了锥形束计算机断层扫描(CBCT),以测量上气道和面部骨骼及周围结构的运动情况。作为对照组的是 30 名骨骼无裂纹的 I 级成年人的 CBCT 图像,他们的年龄、性别和体重指数与对照组相匹配,且未接受过手术干预。 手术后,CLP 患者的鼻咽部体积增大(P 均 < .001)。在术后鼻咽或口咽的体积方面,CLP 患者与对照组没有差异。但是,CLP 患者的鼻腔与对照组有显著差异(P < .001)。 双颌手术后,CLP 患者的鼻腔与对照组相比差异显著。手术后鼻咽和口咽的体积在CLP患者和对照组之间没有差异。
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引用次数: 0
"Digital orthodontics" or just "orthodontics"? "数字正畸 "还是仅仅 "正畸"?
Pub Date : 2024-04-19 DOI: 10.2319/1945-7103-94.3.369
Andre Wilson Machado
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引用次数: 0
期刊
The Angle orthodontist
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