Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology最新文献_第9页

Clinical application principles and new developments of zirconia crown. 氧化锆冠的临床应用原理和新发展。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023404

Jian Wang, Linxin Yang

Zirconia crown has been widely used in the field of prosthodontics. Traditional zirconia exhibits excellent mechanical properties but lacks translucency. The introduction of transparent zirconia significantly enhances its aesthetic performance. In clinical applications, factors affecting the aesthetic results of full zirconia crown should be comprehensively considered, and the most suitable restoration should be chosen. Additionally, clinicians need to design appropriate tooth preparation dimensions and methods based on an individual patient's actual situation. During the clinical bonding process of zirconia, proper surface treatment of the tooth and restoration is essential. The selection of suitable adhesives is crucial for achieving optimal bonding strength and aesthetics.

氧化锆牙冠已广泛应用于口腔修复领域。传统的氧化锆具有出色的机械性能，但缺乏半透明性。透明氧化锆的出现大大提高了其美学性能。在临床应用中，应综合考虑影响氧化锆全冠美观效果的因素，选择最合适的修复体。此外，临床医生还需要根据患者的实际情况设计合适的牙体预备尺寸和方法。在氧化锆临床粘接过程中，对牙齿和修复体进行适当的表面处理至关重要。选择合适的粘合剂对于获得最佳的粘合强度和美观度至关重要。

引用次数: 0

One case of complicated crown root fracture of upper anterior teeth managed by multidisciplinary joint approaches. 通过多学科联合方法治疗一例复杂的上前牙冠根折。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023342

B. Zhang, Yujiang Chen, Junhui Wang, Jiajia Liu, Li’an Wu

Complicated crown root fracture is a serious combined fracture of the enamel, dentin, and cementum in dental trauma. The treatment method is complicated. During the procedure, the condition of pulp, periodontal, and tooth body should be thoroughly evaluated, and a multidisciplinary approach combined with sequential treatment is recommended. This case reported the different treatment and repair processes of one case of two affected teeth after complicated crown root fracture of upper anterior teeth, including regrafting of broken crown after flap surgery at the first visit, direct resin repair to remove broken fragments, and pulp treatment and post-crown repair at the second visit. After 18 months of follow-up, the preservation treatment of the affected teeth with complicated crown root fracture was achieved. Therefore, fragment reattachment and post-crown restoration are feasible treatment options for children with complicated crown root fracture.

复杂牙冠牙根折断是牙外伤中牙釉质、牙本质和牙骨质的严重合并折断。治疗方法比较复杂。在治疗过程中，应全面评估牙髓、牙周和牙体的状况，建议采用多学科方法结合序列治疗。本病例报告了一例上前牙复杂冠根部折断后两颗患牙的不同治疗和修复过程，包括首次就诊时翻瓣手术后再植折断的牙冠，直接树脂修复去除折断的碎片，第二次就诊时进行牙髓治疗和冠后修复。经过 18 个月的随访，复杂冠根折的患牙得到了保存治疗。因此，残根再植和冠后修复是复杂牙冠根折患儿可行的治疗方案。

引用次数: 0

Gingival diffuse large B-cell lymphoma: report of 2 cases. 牙龈弥漫性大 B 细胞淋巴瘤：2 例报告。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023240

Guoli Li, Jing Lou, Na Tan, Hong Zheng

Diffuse large B-cell lymphoma (DLBCL) in the oral gums is very rare and is prone to misdiagnosis and mistreatment. In this paper, 2 cases of oral gingival DLBCL were reported. Their clinicopathological features, diagnosis, and differential diagnosis were discussed based on the literature of 21 cases of gingival DLBCL reported at home and abroad from 2008 to 2023.

口腔牙龈弥漫性大B细胞淋巴瘤（DLBCL）非常罕见，容易误诊误治。本文报告了 2 例口腔牙龈 DLBCL。根据2008年至2023年国内外报道的21例牙龈DLBCL的文献，对其临床病理特征、诊断和鉴别诊断进行了讨论。

引用次数: 0

Chairside digital design and manufacturing method for children's band and loop space maintainers. 椅旁数字设计和制造方法，用于儿童乐队和环形空间维护器。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023346

Qingzhao Qin, Jia Hu, Xiaoxian Chen, Bingqing Shi, Zixiang Gao, Yujia Zhu, A. Wen, Yong Wang, Yijiao Zhao

OBJECTIVESThis study proposes a chairside digital design and manufacturing method for band and loop space maintainers and preliminarily validates its clinical feasibility.METHODSClinical cases of 10 children requiring space maintenance caused by premature loss of primary teeth were collected. Intraoral scan data of the affected children were also collected to establish digital models of the missing teeth. Using a pediatric band and loop space maintainer design software developed by our research team, a rapid personalized design of band and loop structures was achieved, and a digital model of an integrated band and loop space maintainer was ultimately generated. A chairside space maintainer was manufactured through metal computer numerical control machining for the experimental group, whereas metal 3D printing in the dental laboratory was used for the control group. A model fitting assessment was conducted for the space maintainers of both groups, and senior pediatric dental experts were invited to evaluate the clinical feasibility of the space maintainers with regard to fit and stability using the visual analogue scale scoring system. Statistical analysis was also performed.RESULTSThe time spent in designing and manufacturing the 10 space maintainers of the experimental group was all less than 1 h. Statistical analysis of expert ratings showed that the experimental group outperformed the control group with regard to fit and stability. Both types of space maintainers met clinical requirements.CONCLUSIONSThe chairside digital design and manufacturing method for pediatric band and loop space maintainers proposed in this study can achieve same-day fitting of space maintainers at the first appointment, demonstrating good clinical feasibility and significant potential for clinical application.

目的本研究提出了带环间隙保持器的椅旁数字化设计和制造方法，并初步验证了其临床可行性。方法收集了10名因乳牙早失而需要间隙保持的儿童的临床病例。同时还收集了患儿的口内扫描数据，以建立缺失牙齿的数字模型。利用我们研究团队开发的儿童带环空间维持器设计软件，实现了带环结构的快速个性化设计，并最终生成了带环空间维持器的数字模型。实验组通过金属计算机数控加工制造椅旁空间维持器，而对照组则在牙科实验室使用金属三维打印技术。对两组空间维持器都进行了模型试戴评估，并邀请资深儿童牙科专家使用视觉模拟量表评分系统对空间维持器的密合性和稳定性进行临床可行性评估。对专家评分的统计分析显示，实验组在密合性和稳定性方面优于对照组。结论本研究提出的椅旁数字化设计和制造小儿带环空间维持器的方法可实现首次就诊当天安装空间维持器，具有良好的临床可行性和巨大的临床应用潜力。

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引用次数: 0

Trueness evaluation of three intraoral scanners for the recording of maximal intercuspal position. 对三种口内扫描仪记录最大牙间隙位置的真实性进行评估。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023277

Siyu Wang, Zheqing Zhou, Quan Yuan, Li Yue, Shengtao Yang

OBJECTIVESThis clinical study aimed to assess the trueness of three intraoral scanners for the recor-ding of the maximal intercuspal position (MIP) to provide a reference for clinical practice.METHODSTen participants with good occlusal relationship and healthy temporomandibular joint were recruited. For the control group, facebow transferring procedures were performed, and bite registrations at the MIP were used to transfer maxillary and mandibular casts to a mechanical articulator, which were then scanned with a laboratory scanner to obtain digital cast data. For the experimental groups, three intraoral scanners (Trios 3, Carestream 3600, and Aoralscan 3) were used to obtain digital casts of the participants at the MIP following the scanning workflows endorsed by the corresponding manufacturers. Subsequently, measurement points were marked on the control group's digital casts at the central incisors, canines, and first molars, and corresponding distances between these points on the maxillary and mandibular casts were measured to calculate the sum of measured distances (DA). Distances between measurement points in the incisor (DI), canine (DC), and first molar (DM) regions were also calculated. The control group's maxillary and mandibular digital casts with the added measurement points were aligned with the experimental group's casts, and DA, DI, DC, and DM values of the aligned control casts were determined. Statistical analysis was performed on DA, DI, DC, and DM obtained from both the control and experimental groups to evaluate the trueness of the three intraoral scanners for the recording of MIP.RESULTSIn the control group, DA, DI, DC, and DM values were (39.58±6.40), (13.64±3.58), (14.91±2.85), and (11.03±1.56) mm. The Trios 3 group had values of (38.99±6.60), (13.42±3.66), (14.55±2.87), and (11.03±1.69) mm. The Carestream 3600 group showed values of (38.57±6.36), (13.56±3.68), (14.45±2.85), and (10.55±1.41) mm, while the Aoralscan 3 group had values of (38.16±5.69), (13.03±3.54), (14.23±2.59), and (10.90±1.54) mm. Analysis of variance revealed no statistically significant differences between the experimental and control groups for overall deviation DA (P=0.96), as well as local deviations DI (P=0.98), DC (P=0.96), and DM (P=0.89).CONCLUSIONSWith standardized scanning protocols, the three intraoral scanners demonstrated comparable trueness to traditional methods in recording MIP, fulfilling clinical requirements.

方法招募了十名咬合关系良好、颞下颌关节健康的参与者作为对照组。对照组进行面弓转移术，在MIP处进行咬合记录，将上颌和下颌铸模转移到机械关节器上，然后用实验室扫描仪对铸模进行扫描，获得数字化铸模数据。实验组则使用三台口内扫描仪（Trios 3、Carestream 3600 和 Aoralscan 3），按照相应制造商认可的扫描工作流程，在 MIP 处获取参与者的数字化模型。随后，在对照组的数字铸模上的中切牙、犬齿和第一磨牙处标记测量点，并测量上颌和下颌铸模上这些点之间的相应距离，以计算测量距离总和（DA）。此外，还计算了门齿（DI）、犬齿（DC）和第一磨牙（DM）区域测量点之间的距离。将添加了测量点的对照组上颌和下颌数字铸模与实验组铸模对齐，并确定对齐后的对照组铸模的 DA、DI、DC 和 DM 值。结果对照组的 DA、DI、DC 和 DM 值分别为（39.58±6.40）、（13.64±3.58）、（14.91±2.85）和（11.03±1.56）mm。Trios 3 组的数值为（38.99±6.60）、（13.42±3.66）、（14.55±2.87）和（11.03±1.69）毫米。Carestream 3600 组的数值为（38.57±6.36）、（13.56±3.68）、（14.45±2.85）和（10.55±1.41）毫米，而 Aoralscan 3 组的数值为（38.16±5.69）、（13.03±3.54）、（14.23±2.59）和（10.90±1.54）毫米。方差分析显示，实验组和对照组在总体偏差 DA（P=0.96）以及局部偏差 DI（P=0.98）、DC（P=0.96）和 DM（P=0.89）方面无显著统计学差异。

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引用次数: 0

Classified diagnosis and treatment scheme of oral cosmetic restoration based on aesthetic analysis (part Ⅱ): Chinese aesthetic connotation and analysis scheme. 基于美学分析的口腔美容修复分类诊疗方案（第Ⅱ部分）：中国美学内涵与分析方案。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023462

Haiyang Yu, Junyi Zhao, Manlin Sun

At present, the commonly used clinical protocols of oral cosmetic restoration are mostly based on the oral aesthetic indexes proposed by Western developed countries (referred to as Western aesthetics), which are different from the oral aesthetic indexes unique to Chinese people (referred to as Chinese aesthetics). In the design of restoration schemes and the evaluation of restoration effects, these differences have a large or small effect on the doctor-patient-technology triad. Improper handling could directly weaken the cooperation efficiency of the three parties, reduce patient satisfaction, and even lead to medical disputes in serious cases. From doing a good job of oral cosmetic restoration in China, the connotative characteristics of Chinese oral aesthetics are introduced in this paper, and the value of oral aesthetic analysis in diagnosis and treatment is discussed. The process and method of aesthetic analysis and assessment through the modified Chinese psychosocial impact of dental aesthetics questionnaire and the evaluation ruler of the expected value of oral cosmetic restoration are further introduced in detail.

目前，临床上常用的口腔美容修复方案大多是根据西方发达国家提出的口腔美学指标（简称西医美学）制定的，与中国人特有的口腔美学指标（简称中医美学）有所不同。在修复方案的设计和修复效果的评估中，这些差异对医患技三方的影响可大可小。处理不当，会直接削弱三方的合作效率，降低患者满意度，严重的甚至会引发医疗纠纷。本文从做好我国口腔美容修复工作出发，介绍了我国口腔美学的内涵特点，探讨了口腔美学分析在诊疗中的价值。并进一步详细介绍了通过改良的中国人口腔美学社会心理影响问卷进行美学分析和评估的过程和方法，以及口腔美容修复预期价值的评价尺度。

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引用次数: 0

Effect of the application of digital technology-assisted optimization in the process of adjusting jaw position. 在调整下颌位置过程中应用数字技术辅助优化的效果。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-04-01 DOI: 10.7518/hxkq.2024.2023327

Yanji Gong, Yang Liu, Deqiang Yin

OBJECTIVESThe aim of this study was to demonstrate a novel jaw position adjustment technique derived from digital twins and evaluate the application effect of digital technology-assisted optimization in the process of adjusting jaw position on patients with temporomandibular disorders (TMD).METHODSA total of 74 patients with TMD who attended the Department of Temporomandibular Joint, West China Hospital of Stomatology, Si-chuan University, between June 2022 and May 2023 were selected. The patient's initial computed tomography (CT) and bilateral temporomandibular joint data obtained by magnetic resonance imaging (MRI) were collected. The 148 joints were divided into the normal disc-condyle relationship (N) group, disc displacement with reduction (DDWR) group, and disc displacement without reduction (DDWoR) group. Assisted by digital technology, the patient's CT data were reconstructed, and a personalized reference plane was established to adjust the jaw position. A three-point bite guiding splint was designed by the adjusted occlusal space and then fabricated by 3D printing technology. It was worn by the patients and then reviewed by MRI. Before and after the adjustment of jaw position, the amount and direction of condyle and disc displacement and the angle between condyle and disc were measured as the evaluation indexes of the effect of the adjustment. The correlation with condylar displacement was evaluated.RESULTSIn the N group, the disc moved backward and downward along the X and Z axes by (-0.60±0.62) and (0.51±0.71) mm, respectively. In the DDWR group, the disc moved backward and upward along the X and Z axes by (-1.33±1.38) and (-0.09±1.31) mm, respectively. In the DDWoR group, the disc moved forward and downward along the X and Z axes by (0.49±1.76) and (1.35±1.76) mm, respectively. The angle between the condyle and the disc decreased after adjustment of the jaw position in all three groups. All patients showed improvement in symptoms after adjustment.CONCLUSIONSDigital technology-assisted jaw position adjustment can simplify the process, reduce the sensitivity of the technique, and improve patients' disc-condyle structure and symptoms. Therefore, its application in the treatment of patients with TMD is of great clinical significance.

方法选取2022年6月至2023年5月在四川大学华西口腔医院颞下颌关节科就诊的74例TMD患者作为研究对象。收集患者的初始计算机断层扫描（CT）和双侧颞下颌关节磁共振成像（MRI）数据。148个关节被分为椎间盘-髁突关系正常（N）组、椎间盘移位伴缩小（DDWR）组和椎间盘移位不伴有缩小（DDWoR）组。在数字技术的辅助下，对患者的 CT 数据进行重建，并建立个性化的参考平面，以调整下颌位置。根据调整后的咬合空间设计出三点咬合引导夹板，然后通过三维打印技术制作而成。患者佩戴后通过核磁共振检查。在下颌位置调整前后，测量髁突和盘的位移量和方向，以及髁突和盘之间的角度，作为调整效果的评价指标。结果在 N 组中，椎间盘沿 X 轴和 Z 轴向后和向下移动了（-0.60±0.62）毫米和（0.51±0.71）毫米。在DDWR组中，椎间盘沿X轴和Z轴向后和向上移动的幅度分别为（-1.33±1.38）毫米和（-0.09±1.31）毫米。在DDWoR组中，椎间盘沿X轴和Z轴向前和向下移动的幅度分别为（0.49±1.76）毫米和（1.35±1.76）毫米。三组患者在调整下颌位置后，髁突与椎间盘之间的夹角均有所减小。结论数字技术辅助下颌位置调整可以简化过程，降低技术的敏感性，改善患者的椎间盘-髁状突结构和症状。因此，将其应用于 TMD 患者的治疗具有重要的临床意义。

{"title":"Effect of the application of digital technology-assisted optimization in the process of adjusting jaw position.","authors":"Yanji Gong, Yang Liu, Deqiang Yin","doi":"10.7518/hxkq.2024.2023327","DOIUrl":"https://doi.org/10.7518/hxkq.2024.2023327","url":null,"abstract":"OBJECTIVES\u0000The aim of this study was to demonstrate a novel jaw position adjustment technique derived from digital twins and evaluate the application effect of digital technology-assisted optimization in the process of adjusting jaw position on patients with temporomandibular disorders (TMD).\u0000\u0000\u0000METHODS\u0000A total of 74 patients with TMD who attended the Department of Temporomandibular Joint, West China Hospital of Stomatology, Si-chuan University, between June 2022 and May 2023 were selected. The patient's initial computed tomography (CT) and bilateral temporomandibular joint data obtained by magnetic resonance imaging (MRI) were collected. The 148 joints were divided into the normal disc-condyle relationship (N) group, disc displacement with reduction (DDWR) group, and disc displacement without reduction (DDWoR) group. Assisted by digital technology, the patient's CT data were reconstructed, and a personalized reference plane was established to adjust the jaw position. A three-point bite guiding splint was designed by the adjusted occlusal space and then fabricated by 3D printing technology. It was worn by the patients and then reviewed by MRI. Before and after the adjustment of jaw position, the amount and direction of condyle and disc displacement and the angle between condyle and disc were measured as the evaluation indexes of the effect of the adjustment. The correlation with condylar displacement was evaluated.\u0000\u0000\u0000RESULTS\u0000In the N group, the disc moved backward and downward along the X and Z axes by (-0.60±0.62) and (0.51±0.71) mm, respectively. In the DDWR group, the disc moved backward and upward along the X and Z axes by (-1.33±1.38) and (-0.09±1.31) mm, respectively. In the DDWoR group, the disc moved forward and downward along the X and Z axes by (0.49±1.76) and (1.35±1.76) mm, respectively. The angle between the condyle and the disc decreased after adjustment of the jaw position in all three groups. All patients showed improvement in symptoms after adjustment.\u0000\u0000\u0000CONCLUSIONS\u0000Digital technology-assisted jaw position adjustment can simplify the process, reduce the sensitivity of the technique, and improve patients' disc-condyle structure and symptoms. Therefore, its application in the treatment of patients with TMD is of great clinical significance.","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":"69 4","pages":"268-276"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140778266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional odontodysplasia with facial cellulitis: a case report and literature review. 区域性牙体发育不良伴面部蜂窝织炎：病例报告和文献综述。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-02-01 DOI: 10.7518/hxkq.2024.2023247

Zichen Jiang, Yaning Ji, Jimei Su

Regional odontodysplasia (ROD) is a localized developmental anomaly involving deciduous and permanent dentition, with a significant impact on patients. The affected teeth display unique ghost-like radiological characteristics, clinically manifesting as delayed tooth eruption, abnormal tooth morphology, and recurrent swelling of gingiva. In this paper, we report a case of a 2-year-old patient with ROD whose chief complaint was facial cellulitis. We analyze the medical history, clinical examination, radiographic findings, and histologic findings, and review the pathological features, pathogenesis, multidisciplinary diagnosis, and treatment of ROD. This rare case, which offers clinical samples for its further study, can provide a deeper study of ROD.

区域性牙体发育异常（ROD）是一种涉及乳牙和恒牙的局部发育异常，对患者的影响很大。受影响的牙齿显示出独特的幽灵般的放射学特征，临床表现为牙齿萌出延迟、牙齿形态异常和牙龈反复肿胀。本文报告了一例 2 岁的 ROD 患者，主诉为面部蜂窝织炎。我们分析了病史、临床检查、影像学检查结果和组织学检查结果，并回顾了 ROD 的病理特征、发病机制、多学科诊断和治疗。这例罕见病例为其进一步研究提供了临床样本，可以对 ROD 进行更深入的研究。

引用次数: 0

Effect of ceramic type and thickness on the masking ability of chairside machinable all-ceramic crowns. 陶瓷类型和厚度对椅旁可加工全瓷牙冠遮盖能力的影响

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-02-01 DOI: 10.7518/hxkq.2024.2023263

Sinuo Li, Luyao Zhang, Shanshan Liang, Yuqiang Liu, Wenzhong Xing

Objectives: This study aimed to evaluate the influence of ceramic type and thickness on the masking ability and final aesthetic effects of chairside machinable all-ceramic crowns.

Methods: Six kinds from three types chairside machinable ceramic materials (IPS e.max CAD HT/MT/LT, IPS Empress LT, and VITA Suprinity HT/T) in shade A2 were fabricated to slice specimens into 1.0, 1.5, and 2.0 mm-thick sections (n=10). The color parameters of the specimens against black and white tiles and four resin substrates (A2, A4, B3, and C4 shade) were measured with a spectrophotometer. The translucency parameter (TP) was calculated using color parameters measured over standard white and black backgrounds. The color differences (ΔE) were calculated between there substrate shades (A4, B3, C4 ) and A2 shade (control group). Two-way analysis of variance (ANOVA) was performed on the TP values. The two va-riables were ceramic type and ceramic thickness. Three-way ANOVA was used to determine the effects of ceramic materials, ceramic thickness, and substrate shades on the ΔE values, followed by Tukey test for multiple comparisons (α=0.05).

Results: Ceramic type, ceramic thickness, and substrate shade significantly affected the ΔE values (P<0.001). The L* and b* values of the specimens increased with increasing ceramic thickness, except in substrate A2, whereas the ΔE values decreased. The color difference of all 1.0 mm-thick specimens or all specimens over the substrates C4 shade exceeded the clinically acceptable threshold (ΔE>3.3).

Conclusions: The masking ability of chairside machinable all-ceramic crowns is influenced by ceramic type and thickness, and ceramic material. The thickness of ceramic less than 2.0 mm cannot mask the gray shade abutment.

研究目的本研究旨在评估陶瓷类型和厚度对椅旁可加工全瓷牙冠的遮盖能力和最终美学效果的影响：方法：将三种椅旁可加工陶瓷材料（IPS e.max CAD HT/MT/LT、IPS Empress LT 和 VITA Suprinity HT/T）中的六种（色调为 A2）制作成 1.0、1.5 和 2.0 毫米厚的切片（n=10）。用分光光度计测量了试样在黑色和白色瓷砖以及四种树脂基底（A2、A4、B3 和 C4 色调）上的颜色参数。半透明参数（TP）是通过在标准白色和黑色背景上测量的颜色参数计算得出的。计算了 A4、B3 和 C4 底色与 A2 底色（对照组）之间的色差（ΔE）。对 TP 值进行了双向方差分析（ANOVA）。两个变量是陶瓷类型和陶瓷厚度。采用三方方差分析确定陶瓷材料、陶瓷厚度和基底色调对 ΔE 值的影响，然后进行 Tukey 多重比较检验（α=0.05）：结果：陶瓷类型、陶瓷厚度和基底色调对ΔE 值有显著影响（P3.3）：结论：椅旁可加工全瓷冠的遮盖能力受陶瓷类型、厚度和陶瓷材料的影响。厚度小于 2.0 mm 的陶瓷无法遮盖灰色基台。

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引用次数: 0

Clinical analysis of nonsyndromic oligodontia phenotypes. 非综合征性少齿畸形表型的临床分析。

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology

Pub Date : 2024-02-01 DOI: 10.7518/hxkq.2024.2023203

Lihong Shu, Zichun Tang, Haixia Wang, Li Cao, Hu Li

Objectives: To provide references, this study investigated the clinical characteristics of patients with nonsyndromic oligodontia.

Methods: The information of 178 patients with oligodontia was collected, including histories, oral examinations, and panoramic radiographs. Tooth agenesis characteristics were calculated and evaluated. All the data were statistically analyzed with SPSS 24.0 software.

Results: No significant difference in the number of missing teeth was found between sexes nor between the right and left sides, and congenitally missing teeth affected the maxillary arch (P<0.05). The highest prevalence of tooth agenesis was observed in the mandibular second premolars. In the maxillary arch, the most common pattern of tooth agenesis was agenesis of the bilateral first and second premolars. The agenesis of the bilateral second premolars was observed in the mandibular arch. The prevalence of a symmetric pattern between the right and left quadrants was significantly higher than that of matched patterns between the maxillary and mandibular antagonistic quadrants. Approximately 16.85% of patients with nonsyndromic oligodontia were affected by other tooth-related anomalies.

Conclusions: The common patterns of tooth agenesis were successfully identified in patients with nonsyndromic oligodontia. Dentists need to provide multidisciplinary treatments for patients with nonsyndromic oligodontia because of variations in occluding and full-mouth tooth agenesis patterns.

目的：为了提供参考，本研究调查了非综合征性少齿畸形患者的临床特征：为了提供参考，本研究调查了非综合征性少齿畸形患者的临床特征：方法：收集了 178 名少齿畸形患者的信息，包括病史、口腔检查和全景X光片。计算并评估了牙齿缺失的特征。所有数据均采用 SPSS 24.0 软件进行统计分析：结果：缺失牙的数量在男女之间、左右两侧之间均无明显差异，先天性缺失牙主要集中在上颌牙弓（P.C.）：在非综合征性少牙症患者中成功识别了牙齿缺失的常见模式。由于咬合和全口牙齿缺失的模式存在差异，牙科医生需要为非综合征少牙症患者提供多学科治疗。

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引用次数: 0