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Novel 3-dimensional classification of cervical abrasion using CBCT: A comprehensive analysis 利用 CBCT 对宫颈擦伤进行三维分类:综合分析
Q1 Medicine Pub Date : 2024-08-28 DOI: 10.1016/j.jobcr.2024.08.007
Tarun Kumar Singh, Ashish J. Johnson, Aakash Gupta, Ikroop Gill

Introduction

Tooth cervical abrasion (CA) is a prevalent non-carious cervical lesion that poses challenges for accurate diagnosis from periapical radiographs due to difficulties in assessing the lesion's extent, associated bone loss, and pulpal involvement. The presence of overlying bone structures on the palatal side when lesions are located on the buccal side, or vice versa, further complicates radiographic interpretation. So it is important to define the lesions in all three dimensions.

Objective

To provide a three-dimensional descriptive classification for cervical abrasion lesions using Cone Beam Computed Tomography (CBCT).

Method

A total of 50 patients with cervical abrasion were selected for the study. From these patients, teeth (n = 10) from each of the four different quadrants were chosen. A CBCT scan with a 6 × 6 cm field of view (FOV) was performed, and the DICOM files of the cervical lesions were transferred to 3-D imaging software. The CBCT images of the cervical abrasion lesions were assessed at the level of the deepest point of the lesion along the long axis of the tooth in both axial and sagittal planes. The height (A), buccolingual dimension (B), circumferential spread (C), and remaining dentine thickness (D) were evaluated and classified using new scoring criteria for each dimension. The reliability and reproducibility of the classification were assessed to ensure its clinical applicability.

Conclusion

CBCT can be utilized to classify tooth cervical abrasion in endodontics, enhancing diagnosis, analysis, and treatment outcomes. This three-dimensional view facilitates easier communication among clinicians, allows for tailored treatment approaches, and opens new avenues for research.

导言:牙颈部磨蚀(CA)是一种常见的非龋性牙颈部病变,由于难以评估病变范围、相关骨质流失和牙髓受累情况,因此很难通过根尖周X光片进行准确诊断。当病变位于颊侧时,腭侧存在覆盖骨结构,反之亦然,这都会使影像学解释更加复杂。因此,在三个维度上对病变进行定义是非常重要的。研究共选取了 50 名宫颈磨蚀患者,从这些患者的四个不同象限中各选取了一颗牙齿(n = 10)。进行视场(FOV)为 6 × 6 厘米的 CBCT 扫描,并将宫颈病变的 DICOM 文件传输到三维成像软件。牙颈部磨蚀病变的 CBCT 图像是在病变最深点的水平沿牙齿长轴在轴向和矢状面上进行评估的。采用新的评分标准对每个维度的高度(A)、颊舌向尺寸(B)、周向扩散(C)和剩余牙本质厚度(D)进行评估和分类。结论CBCT 可用于牙髓病学中的牙颈部磨蚀分类,从而提高诊断、分析和治疗效果。这种三维视图便于临床医生之间的交流,允许采用量身定制的治疗方法,并为研究开辟了新的途径。
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引用次数: 0
Efficacy of low-level laser therapy and microsurgery on neurosensory recovery following inferior alveolar and lingual nerve injuries: A systematic review 低强度激光疗法和显微外科手术对下牙槽神经和舌神经损伤后神经感觉恢复的疗效:系统性综述
Q1 Medicine Pub Date : 2024-08-24 DOI: 10.1016/j.jobcr.2024.08.006
Gharam Alharbi , Jingade Krishnojirao Dayashankara Rao , Tariq Alnaim , Norah Alzamil , Ramesh nagarajappa

Purpose

This systematic review evaluates the relative effectiveness of low-level laser therapy (LLLT) and microsurgery for neurosensory recovery following sustained iatrogenic injuries to the inferior alveolar nerve (IAN) and lingual nerve (LN) more than 6 months in Oral and Maxillofacial surgery procedures.

Methods

Six articles were included. The mean age of microsurgery studies was 41.5 years and that of LLLT studies was 31.5 with female predominance in all studies. The majority of the included studies have been based on both subjective and objective assessments for neurosensory, two investigating microsurgery and four investigating LLLT following a Six-month post-IAN and LN injury.

Results

Each modality demonstrated positive outcomes in both subjective and objective assessments of neurosensory function. Notably, LLLT exhibited efficacy even when employed beyond a six-month interval following the initial injury. Early intervention is generally recommended, particularly for microsurgical approaches.

Conclusion

LLLT shows exciting promise as a minimally invasive approach for neurosensory rehabilitation even after six months of injury, while microsurgery studies revealed an improvement and the recommendation for early intervention post-nerve injury, the potential of LLLT and optimize its use for neurosensory rehabilitation, additional randomized controlled trials with larger sample sizes, longer follow-up periods, and blinding protocols are necessary.

目的 本系统综述评估了低强度激光疗法(LLLT)和显微外科手术对口腔颌面外科手术中下齿槽神经(IAN)和舌神经(LN)持续先天性损伤超过 6 个月后神经感觉恢复的相对有效性。显微外科研究的平均年龄为 41.5 岁,LLLT 研究的平均年龄为 31.5 岁,所有研究均以女性为主。纳入的大多数研究都基于神经感觉的主观和客观评估,其中两篇研究了 IAN 和 LN 损伤后六个月的显微手术,四篇研究了 LLLT。值得注意的是,LLLT 即使在初次损伤后 6 个月后仍有疗效。结论LLLT作为一种微创方法,在神经感觉康复方面显示出令人振奋的前景,甚至在损伤六个月后仍有疗效,而微创手术研究显示出神经损伤后早期干预的改善和建议,LLLT的潜力和优化其在神经感觉康复方面的应用,需要更多样本量更大、随访时间更长和盲法方案的随机对照试验。
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引用次数: 0
Effect of compressive force combined with vibration on CCL2 and CCL5 in human periodontal ligament cells 压缩力和振动对人类牙周韧带细胞中 CCL2 和 CCL5 的影响
Q1 Medicine Pub Date : 2024-08-21 DOI: 10.1016/j.jobcr.2024.08.005
Supunsa Pongtiwattanakul , Chidchanok Leethanakul , Onnicha Rattanaporn , Peungchaleoy Thammanichanon , Sissada Tannukit

Purpose

To investigate the effect of compressive force combined with vibration on expression of CC-chemokine ligand 2 (CCL2) and 5 (CCL5) in human periodontal ligament (hPDL) cells.

Methods

Human PDL cells were cultured and assigned into four groups: control (Con), compressive force 2.0 g/cm2 for 24 h and 48 h (C), vibration 0.3 g 30 Hz for 20 min every 24 h (V), and compressive force combined with vibration (VC). At 24 h and 48 h, mRNA and protein levels of CCL2 and CCL5 were examined by quantitative reverse transcription polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA), respectively.

Results

At 24 h and 48 h, CCL2 mRNA and protein levels in C and VC were significantly higher than Con. At 24 h, VC showed significantly higher CCL2 mRNA expression than C. However, there was no significant difference between CCL2 protein in C and VC at both time points. At 24 h and 48 h, CCL5 mRNA expression was significantly down-regulated in V and VC, whereas CCL5 protein was undetectable in all groups.

Conclusions

Application of compressive force combined with vibration resulted in the upregulation of CCL2 mRNA and protein levels, whereas CCL5 mRNA expression was down-regulated.

方法培养人牙周韧带(hPDL)细胞并将其分为四组:对照组(Con)、24 h 和 48 h 加压 2.0 g/cm2 组(C)、每 24 h 振动 0.3 g 30 Hz 20 min 组(V)和加压与振动结合组(VC)。结果24 h和48 h时,C和VC的CCL2 mRNA和蛋白质水平明显高于Con。24 h时,VC的CCL2 mRNA表达量明显高于C。在 24 h 和 48 h,CCL5 mRNA 表达在 V 和 VC 中明显下调,而 CCL5 蛋白在所有组中都检测不到。
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引用次数: 0
Characterization of nanoceria-modified silicone soft liners: Surface morphology, hardness, wettability, cytotoxicity, and antifungal properties in artificial saliva – An in vitro study 纳米铈改性硅胶软衬垫的表征:人工唾液中的表面形态、硬度、润湿性、细胞毒性和抗真菌特性--体外研究
Q1 Medicine Pub Date : 2024-08-17 DOI: 10.1016/j.jobcr.2024.08.003
Sabat Mukesh Raghunath, Jeyaraj Brintha Jei, Balasubramanium Muthukumar

Statement of problem

Soft liners are essential for denture wearers, which aids in the healing of soft tissue injuries caused by rough denture base surfaces. Silicone soft liners, while effective, can accumulate biofilm over time, necessitating enhancement.

Purpose

This in vitro study aimed to assess the efficacy of silicone soft liners incorporating varying concentrations of cerium oxide nanoparticles.

Materials and methods

A stainless-steel die as per ISO standard 10139-2-2018 (35 × 6 mm), Using G*Power 3.0.10 software, 400 samples were prepared with 95 % confidence interval and 80 % power. Samples were divided into five groups: surface morphology (Group A), surface hardness (Group B), wettability (Group C), cytotoxicity (Group D), and antifungal property (Group E). Each group was subdivided based on cerium oxide nanoparticle concentrations. Samples were stored in artificial saliva until evaluation. Surface morphology was examined via scanning electron microscopy (SEM), surface hardness using Shore A Durometer, wettability by drop shape analysis, cytotoxicity via MTT assay, and antifungal properties using crystal violet staining.Data were assessed for normal distribution using Kolmogorov-Smirnov and Shapiro-Wilk tests.

Results

SEM analysis showed optimal nanoparticle dispersion in Group A2(0.25 %) and A3 (0.5 %). Group B2 (0.25 %) exhibited the lowest mean surface hardness, decreasing from day 1 to day 30. Group C3 demonstrated the most hydrophobic surface across days. Group D2 exhibited the least cytotoxicity at all time intervals. Group E4 displayed the highest antifungal activity.

Conclusion

Within study limitations, silicone soft liners modified with 0.25 % and 0.5 % cerium oxide nanoparticles exhibited superior properties in surface hardness and cytotoxicity. Optimal surface morphology and wettability were observed with 0.5 % concentration, while antifungal efficacy peaked at 1 %. These findings suggest clinical potential for treating damaged oral tissues.

Clinical implications

Soft liners modified with 0.25 % and 0.5 % cerium oxide nanoparticles may benefit patients with oral tissue abuse, offering enhanced therapeutic properties.

问题陈述软衬垫对于义齿佩戴者来说是必不可少的,它有助于因义齿基托表面粗糙而造成的软组织损伤的愈合。本体外研究旨在评估含有不同浓度氧化铈纳米颗粒的硅胶软衬垫的功效。材料和方法根据 ISO 标准 10139-2-2018 (35 × 6 毫米),使用 G*Power 3.0.10 软件制备了 400 个样本,置信区间为 95 %,功率为 80 %。样品被分为五组:表面形态(A 组)、表面硬度(B 组)、润湿性(C 组)、细胞毒性(D 组)和抗真菌性(E 组)。每组根据纳米氧化铈的浓度进行细分。样品在评估前保存在人工唾液中。使用扫描电子显微镜(SEM)检查表面形态,使用邵氏硬度计(Shore A Durometer)检测表面硬度,使用液滴形状分析法检测润湿性,使用 MTT 法检测细胞毒性,使用水晶紫染色法检测抗真菌性能。结果SEM 分析表明,A2 组(0.25%)和 A3 组(0.5%)的纳米粒子分散度最佳。B2 组(0.25%)的平均表面硬度最低,从第 1 天到第 30 天一直在下降。C3 组的表面疏水性最强。在所有时间间隔内,D2 组的细胞毒性最小。结论在有限的研究范围内,用 0.25 % 和 0.5 % 纳米氧化铈修饰的硅胶软衬垫在表面硬度和细胞毒性方面表现出更优越的特性。0.5 % 浓度的纳米氧化铈具有最佳的表面形态和润湿性,而 1 % 浓度的纳米氧化铈具有最高的抗真菌效果。临床意义用 0.25 % 和 0.5 % 纳米氧化铈粒子修饰的软衬垫可为口腔组织滥用患者带来益处,增强治疗效果。
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引用次数: 0
Development and validation of dental visiting behavior among adults based on health belief model 基于健康信念模式的成人牙科就诊行为的开发与验证
Q1 Medicine Pub Date : 2024-08-17 DOI: 10.1016/j.jobcr.2024.08.004
Jagadeeswara Rao Sukhabogi, Dolar Doshi, Bhavyatha Vaggala, Aishwarya Lakshmi Billa

Aim

This study aimed to develop and validate an instrument, Dental Visiting Behavior Based on Health Belief Model among Adults (DVBHBM), and to assess factors influencing adults' dental visiting behavior based on Health Belief Model.

Materials and methods

This cross-sectional study was conducted among 277 adults in Hyderabad, India. The DVBHBM instrument, based on Health Belief Model, was developed, validated, and distributed among participants. Exploratory factor analysis, reliability analysis, descriptive analysis, independent t-tests, and path analysis were conducted to explore construct validity, internal consistency, attitudes, and relationship among variables.

Results

Participants with discomfort exhibited higher perceived susceptibility (3.70 ± 1.15) compared to those with regular dental visits (2.84 ± 1.26, p < 0.05). Conversely, individuals with regular dental visits demonstrated significantly greater perceived benefits (22.32 ± 2.5) than those experiencing discomfort (19.76 ± 3.36, p = 0.001). Perceived barriers were lower among individuals with regular dental visits (11.01 ± 4.61) compared to those experiencing discomfort (12.71 ± 4.26, p = 0.001). Participants with regular dental visits also perceived the severity of not visiting a dentist (3.87 ± 0.95) more strongly than those experiencing discomfort (2.91 ± 1.03, p = 0.000). Cues to action were more pronounced in individuals with discomfort (3.34 ± 1.06) compared to those with regular dental visits (2.98 ± 1.07, p < 0.05).

Conclusion

Participants exhibiting discomfort in dental visits had significantly higher perceived susceptibility, perceived barriers, cues to action and self-efficacy towards dental visits. However, factors such as age, gender, marital status, income, brushing, flossing and tobacco use did not impact dental visiting behaviour of adults.

目的 本研究旨在开发和验证一种工具--基于健康信念模型的成人看牙行为(DVBHBM),并评估影响基于健康信念模型的成人看牙行为的因素。根据健康信念模型开发、验证了 DVBHBM 工具,并在参与者中进行了分发。研究人员进行了探索性因子分析、可靠性分析、描述性分析、独立 t 检验和路径分析,以探讨构建有效性、内部一致性、态度和变量之间的关系。结果与定期看牙医的人相比(2.84 ± 1.26,p < 0.05),身体不适的参与者表现出更高的感知易感性(3.70 ± 1.15)。相反,定期看牙医的人所感受到的益处(22.32 ± 2.5)明显高于那些感到不适的人(19.76 ± 3.36,p = 0.001)。定期看牙医的受试者感知到的障碍(11.01 ± 4.61)低于感到不适的受试者(12.71 ± 4.26,p = 0.001)。定期看牙医的受试者对不看牙医的严重性的感知(3.87 ± 0.95)也比不适者(2.91 ± 1.03,p = 0.000)更强烈。与定期看牙医的人(2.98 ± 1.07,p = 0.05)相比,有不适感的人(3.34 ± 1.06)的行动暗示更明显。然而,年龄、性别、婚姻状况、收入、刷牙、使用牙线和吸烟等因素并不影响成年人的看牙行为。
{"title":"Development and validation of dental visiting behavior among adults based on health belief model","authors":"Jagadeeswara Rao Sukhabogi,&nbsp;Dolar Doshi,&nbsp;Bhavyatha Vaggala,&nbsp;Aishwarya Lakshmi Billa","doi":"10.1016/j.jobcr.2024.08.004","DOIUrl":"10.1016/j.jobcr.2024.08.004","url":null,"abstract":"<div><h3>Aim</h3><p>This study aimed to develop and validate an instrument, Dental Visiting Behavior Based on Health Belief Model among Adults (DVBHBM), and to assess factors influencing adults' dental visiting behavior based on Health Belief Model.</p></div><div><h3>Materials and methods</h3><p>This cross-sectional study was conducted among 277 adults in Hyderabad, India. The DVBHBM instrument, based on Health Belief Model, was developed, validated, and distributed among participants. Exploratory factor analysis, reliability analysis, descriptive analysis, independent t-tests, and path analysis were conducted to explore construct validity, internal consistency, attitudes, and relationship among variables.</p></div><div><h3>Results</h3><p>Participants with discomfort exhibited higher perceived susceptibility (3.70 ± 1.15) compared to those with regular dental visits (2.84 ± 1.26, p &lt; 0.05). Conversely, individuals with regular dental visits demonstrated significantly greater perceived benefits (22.32 ± 2.5) than those experiencing discomfort (19.76 ± 3.36, p = 0.001). Perceived barriers were lower among individuals with regular dental visits (11.01 ± 4.61) compared to those experiencing discomfort (12.71 ± 4.26, p = 0.001). Participants with regular dental visits also perceived the severity of not visiting a dentist (3.87 ± 0.95) more strongly than those experiencing discomfort (2.91 ± 1.03, p = 0.000). Cues to action were more pronounced in individuals with discomfort (3.34 ± 1.06) compared to those with regular dental visits (2.98 ± 1.07, p &lt; 0.05).</p></div><div><h3>Conclusion</h3><p>Participants exhibiting discomfort in dental visits had significantly higher perceived susceptibility, perceived barriers, cues to action and self-efficacy towards dental visits. However, factors such as age, gender, marital status, income, brushing, flossing and tobacco use did not impact dental visiting behaviour of adults.</p></div>","PeriodicalId":16609,"journal":{"name":"Journal of oral biology and craniofacial research","volume":"14 5","pages":"Pages 620-625"},"PeriodicalIF":0.0,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2212426824001209/pdfft?md5=48fc4fd963d94dfe94d5005cae7f6d74&pid=1-s2.0-S2212426824001209-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141997433","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
Diagnostic accuracy of salivary hemoglobin, lactate dehydrogenase and Interleukin-6 to determine chronic periodontitis and tooth loss in type 2 diabetics 唾液血红蛋白、乳酸脱氢酶和白细胞介素-6 对判定 2 型糖尿病患者慢性牙周炎和牙齿脱落的诊断准确性
Q1 Medicine Pub Date : 2024-08-13 DOI: 10.1016/j.jobcr.2024.08.002
Sunila Bukanakere Sangappa , Harsha Mysore Babu , Ravindra C Savadi , Ashwini Jithendra

Background

Salivary Hemoglobin (SH) has emerged as the mainstay non-invasive and a practicable screening method for Chronic Periodontitis. Current research aims to comprehensively assess the diagnostic value of Salivary Hb (SH) in comparison with Salivary IL-6 (SIL-6) and levels of Salivary lactate dehydrogenase enzyme (SLDH) amongst Type II Diabetes subjects having Chronic Periodontitis (CP) and associated tooth loss.

Materials and methods

In this cross-sectional comparative investigation, 240 individuals with at least 15 remaining teeth, ranging in age from 30 to 70, were chosen and Group I controls were defined as follows: healthy (HbA1c levels ≤6.4 %) with no CP; Group II included chronic periodontitis and non-T2DM (HbA1c ≤ 6.4 %); Group III included T2DM (HbA1c ≥ 6.5 %) and CP; and Group IV included T2DM (HbA1c ≥ 6.5 %) with periodontitis-related tooth loss. ELISA colorimetric assay was used to quantify the results using the unstimulated whole saliva of fasting participants. Tukey's post hoc test was used for statistical analysis following Analysis of Variance (ANOVA), and Sensitivity and Specificity were computed following the determination of the correlation coefficient.

Results

One-way ANOVA comparing Biomarker levels across the four groups revealed a statistically significant difference (F = 68.013) (p = 0.0001). Tukey's multiple post hoc yielded a significant difference between groups with least mean average biomarker levels observed among the controls (Group1) and maximum with group IV. Diagnostic Accuracy to discriminate between CP in T2DM & Controls with SH surpassed that of SIL-6 & SLDH, Receiver operating characteristic (ROC) curve depicted an overall sensitivity of 67.62 %, specificity of 80 % and accuracy of 74 % in T2DM subjects with tooth loss for the identification and assessment of CP.

Conclusion

Estimates of Salivary Hemoglobin can assume an important role in comparison to SIL-6 & SLDH in determining the degree of periodontitis, including tooth loss, and identifying elevated glycemic levels. Advanced detection and monitoring can be ensured by routine use in dental offices and general practice.

背景唾液血红蛋白(SH)已成为慢性牙周炎的主要非侵入性实用筛查方法。目前的研究旨在全面评估唾液血红蛋白(SH)与唾液 IL-6(SIL-6)和唾液乳酸脱氢酶(SLDH)水平在患有慢性牙周炎(CP)并伴有牙齿脱落的 II 型糖尿病受试者中的诊断价值。材料和方法在这项横断面比较调查中,我们选择了 240 名至少有 15 颗剩余牙齿的人,他们的年龄从 30 岁到 70 岁不等,I 组对照定义如下:健康(HbA1c 水平 ≤6.4 %),无 CP;II 组包括慢性牙周炎和非 T2DM(HbA1c ≤ 6.4 %);III 组包括 T2DM(HbA1c ≥ 6.5 %)和 CP;IV 组包括 T2DM(HbA1c ≥ 6.5 %)和牙周炎相关的牙齿缺失。采用 ELISA 比色法对空腹参与者的全唾液进行定量分析。在方差分析(ANOVA)后采用Tukey's post hoc检验进行统计分析,并在确定相关系数后计算灵敏度和特异度。结果单因子方差分析比较了四个组的生物标志物水平,结果显示差异有统计学意义(F = 68.013)(p = 0.0001)。Tukey多重事后分析结果显示,对照组(第一组)平均生物标志物水平最低,而第四组平均生物标志物水平最高,组间差异显著。受试者操作特征曲线(ROC)显示,在牙缺失的 T2DM 受试者中,识别和评估 CP 的总体灵敏度为 67.62%,特异度为 80%,准确度为 74%。结论与 SIL-6 & SLDH 相比,唾液血红蛋白的估计值在确定牙周炎(包括牙齿脱落)的程度和识别血糖水平升高方面可以发挥重要作用。在牙科诊所和全科诊所常规使用唾液血红蛋白可以确保先进的检测和监测。
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引用次数: 0
Evaluation of primary teeth root canal orifices with naked eye and using magnifying loupes – An in vivo study 用肉眼和放大镜评估基牙根管口 - 一项活体研究
Q1 Medicine Pub Date : 2024-08-08 DOI: 10.1016/j.jobcr.2024.08.001
Yamuna Shanmugam , Aksshaya Raghu , M.S. Muthu , Kavitha Swaminathan , Selvakumar Haridoss , K.C. Vignesh , Mayur Bhattad

Background

Knowledge of the anatomy and morphology of root canal orifices and variations are vital elements affecting treatment outcomes.

Aim

The objective of this study was to evaluate variations in the number of root canal orifices and their patterns in primary teeth, as identified by both the naked eye and under magnifying loupes.

Materials and methods

Total of 173 primary teeth was scheduled for pulpectomy over a period of 18 months. Two examiners assessed the number and pattern of the root canal orifices. After access cavity preparation, the operator recorded the number of root canal orifices with naked eye, and examiner recorded the same using magnifying loupes (3.5×). After cleaning and shaping, the same protocol was used. Collected data were statistically analyzed using SPSS version 23.0 and compared using a paired t-test.

Results

The overall variation in the in the identification of root canal orifices between the naked eye and magnifying loupes (3.005 ± 0.971) was statistically significant after access cavity preparation (P ≤ 0.05).

Conclusion

Magnifying loupes significantly enhances the determination of the number and pattern of root canal orifices in primary teeth. Therefore, the application of magnifying loupes is essential for accurately assessing variations in root canal orifices in primary dentition.

背景对根管口解剖和形态的了解以及根管口的变化是影响治疗效果的重要因素。本研究的目的是评估肉眼和放大镜下识别的乳牙根管口数量及其形态的变化。两名检查员评估根管口的数量和形态。准备好通路洞后,操作员用肉眼记录根管口的数量,检查员用放大镜(3.5 倍)记录。清洁和修整后,使用相同的程序。用 SPSS 23.0 版对收集到的数据进行统计分析,并用配对 t 检验进行比较。结果在进行通路龋洞预备后,肉眼和放大镜识别根管孔的总体差异(3.005 ± 0.971)具有统计学意义(P ≤ 0.05)。因此,放大镜的应用对于准确评估乳牙根管口的变化至关重要。
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引用次数: 0
Understanding the spatial and topographic characteristics of enamel white spot lesions for targeted remineralization 了解釉质白斑病变的空间和地形特征,实现有针对性的再矿化
Q1 Medicine Pub Date : 2024-08-02 DOI: 10.1016/j.jobcr.2024.07.006
Devanshi Rajesh Chhabria , Ramya Ramadoss MDS.,PhD , Hema Shree K MDS , Sandhya Sundar MDS , Suganya Panneer Selvam MDS , Pratibha Ramani MDS.,PhD

Introduction

White spot lesions are opaque, chalky white or yellowish discolorations on the surface of teeth that result from the demineralization of the tooth structure. Many methods, including SEM, XRD, and FTIR spectroscopy, are crucial for identifying and evaluating enamel white spot lesions. It is imperative to have a thorough grasp of the morphology, crystallographic structure, mineral composition, and chemical changes associated with enamel white spot lesions.

Method

In vitro lesions were meticulously obtained by immersing extracted teeth in hydrochloric acid for a week and drying them using artificial caries. Characterization investigations were conducted with utmost precision and thoroughness using FTIR, XRD, and SEM, ensuring the reliability and validity of the results.

Results

FTIR analysis revealed the existence of calcium oxide and hydroxyapatite, and SEM examination assisted in identifying differences in surface shape. The enamel's crystalline nature was revealed via XRD investigation.

Conclusion

White spot lesions are associated with the development of deep caries. Advanced imaging strategies are needed for additional validation.

导言白斑病是牙齿表面不透明、白垩色或淡黄色的色斑,是牙齿结构脱矿的结果。许多方法,包括扫描电子显微镜、X射线衍射和傅立叶变换红外光谱,对于识别和评估釉质白斑病变至关重要。必须全面掌握与釉质白斑病变相关的形态、晶体结构、矿物成分和化学变化。方法将拔出的牙齿在盐酸中浸泡一周,然后用人工龋齿将其烘干,细致地获得体外病变。采用傅立叶变换红外光谱(FTIR)、X射线衍射(XRD)和扫描电子显微镜(SEM)进行表征研究,确保研究结果的可靠性和有效性。结果 傅立叶变换红外光谱分析显示存在氧化钙和羟磷灰石,扫描电子显微镜检查有助于确定表面形状的差异。结论白斑病变与深龋的发展有关。需要先进的成像策略来进一步验证。
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引用次数: 0
Proposal for a grading system to determine the clinical status and sequence of permanent teeth eruption: A pilot study 关于确定恒牙萌出临床状态和顺序的分级系统的建议:试点研究
Q1 Medicine Pub Date : 2024-07-27 DOI: 10.1016/j.jobcr.2024.07.005
Vandana S , Muthu MS , Kandaswamy D , Aswath Narayanan MB

Objectives

The objective of the study was to propose and test a new grading system to quantify the clinical eruption of teeth into the oral cavity. In addition, the study also aimed to apply the grading system to a sample population to determine the chronology and sequence of permanent tooth eruptions, comparing the results with an existing standard table.

Methods

A cross-sectional study was designed, and 1220 children aged 5–18 years were selected from five schools in Chennai. The clinical status of permanent tooth eruption was graded using the newly proposed system. The sequence and chronology of permanent tooth eruptions were determined using Probit analysis and compared with those established by Logan and Kronfeld. The difference in stages of eruption between the sexes was analyzed using the ANOVA test.

Results

The study sample included 515 boys and 705 girls. A total of 23,218 permanent maxillary and mandibular teeth were examined and graded. Of the 11,085 maxillary teeth, 367 were classified as grade 1, 660 as grade 2, and 10,058 as grade 3. Similarly, of the 12,133 mandibular teeth, 497 were grade 1, 793 were grade 2, and 10,843 were grade 3. The eruption of the maxillary canines, second molars, and mandibular second premolars was observed to have occurred earlier than in the traditional table of tooth eruption. The most significant differences in the stages of eruption between the sexes were observed in the 9–12 age group.

Conclusions

The newly proposed grading system was found to be simple, objective, less confusing, and more robust, compared with the existing systems in determining the clinical status of tooth eruptions. The ages of eruption of maxillary canines, second molars, and mandibular second premolars were earlier.

研究目的该研究旨在提出并测试一种新的分级系统,以量化口腔中牙齿的临床萌出情况。此外,研究还旨在将该分级系统应用于样本人群,以确定恒牙萌出的时间和顺序,并将结果与现有的标准表格进行比较。方法研究设计了一项横断面研究,从钦奈的五所学校中选取了 1220 名 5-18 岁的儿童。采用新提出的系统对恒牙萌出的临床状况进行分级。采用 Probit 分析法确定恒牙萌出的顺序和时间,并与 Logan 和 Kronfeld 确定的顺序和时间进行比较。研究样本包括 515 名男孩和 705 名女孩。共对 23,218 颗上颌和下颌恒牙进行了检查和分级。在 11,085 颗上颌牙中,367 颗被划分为 1 级,660 颗为 2 级,10,058 颗为 3 级。同样,在 12,133 颗下颌牙中,497 颗为 1 级,793 颗为 2 级,10,843 颗为 3 级。据观察,上颌犬齿、第二臼齿和下颌第二前臼齿的萌出时间早于传统的牙齿萌出时间表。结论与现有的系统相比,新提出的分级系统在确定牙齿萌出的临床状态方面简单、客观、不易混淆且更可靠。上颌犬齿、第二磨牙和下颌第二前磨牙的萌出年龄较早。
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引用次数: 0
Effectiveness of chitosan nanoparticles, and novel chemical irrigants with surfactant on smear layer removal and microhardness alteration 壳聚糖纳米颗粒和含有表面活性剂的新型化学冲洗剂对去除涂抹层和改变显微硬度的效果
Q1 Medicine Pub Date : 2024-07-25 DOI: 10.1016/j.jobcr.2024.06.005
Monika Khangwal , Ravinder Solanki , Hena Rahman , vinay , Neha Saini , Nilesh Bagde

Objective

This current study was designed to compare and correlate between smear layer eradication and reduction in microhardness by natural 0.2%chitosan nanoparticles and novel chemical irrigants with surfactant at the apical root third.

Materials and method

One hundred and twenty straight single-rooted extracted lower premolars were decoronated and working length obtained with #10 K-file. Pro-taper rotary files were used till apical size F3. The canals were simultaneously flushed with assigned irrigant containing surfactant [(ChX-Ultra, NaOCl-Extra, Pro-EDTA, 0.2%chitosan nanoparticles, Biopure MTAD]. The samples were randomly divided into two equal groups (n = 60). InGroup S (n = 60), the residual smear layer was examined by scanning electron microscope and in Group M(n = 60) microhardness was determined by Vickers Microhardness Tester. Further both groups were divided into six equal groups (n = 10 each) according to assigned irrigating solutions.

For smear layer removal; Kruskal-Wallis tests followed by pair wise comparison using Mann Whitney U test was done. For change in microhardness ANOVA and post hoc Tukey tests was done.

Results

Maximum smear layer removal was recorded in Biopure MTAD (1.8 ± 0.63), followed by pro-EDTA (2.2 0 ± 0.63) then 0.2%chitosan (2.6 ± 0.51), then NaOCL Extra (3.5 ± 0.53)and least in CHX-Ultra (4.4 ± 0.52) and saline (5.0 ± 0.00). Pro-EDTA group (12.8 ± 2.47) revealed significant highest reduction in microhardness followed by Biopure MTAD (8.01 ± 3.06), 0.2%chitosan nanoparticles (5.48 ± 2.87), NaOCl-Extra (5.44 ± 1.62) and least recorded in CHX-Ultra (4.94 ± 1.43) and saline (3.04 ± 0.63).

Conclusion

The elimination of the smear layer is always accompanied by a reduction in microhardness. Moreover, irrigant with surfactant and chelators enhanced smear layer removal, with best perceived in Biopure MTAD.

本研究旨在比较天然 0.2% 壳聚糖纳米颗粒和新型表面活性剂化学灌洗剂在根尖三分之一处消除涂抹层和降低微硬度之间的关系。使用专业锥度旋转锉直到根尖尺寸 F3。同时用指定的含有表面活性剂的冲洗剂[(ChX-Ultra、NaOCl-Extra、Pro-EDTA、0.2%壳聚糖纳米颗粒、Biopure MTAD]冲洗根管。样品被随机分为两个等量组(n = 60)。S 组(n = 60)用扫描电子显微镜检查残留涂抹层,M 组(n = 60)用维氏显微硬度计测定显微硬度。对于涂抹层的去除,采用 Kruskal-Wallis 检验,然后使用 Mann Whitney U 检验进行配对比较。结果 Biopure MTAD(1.8 ± 0.63)的涂片层去除率最高,其次是 Pro-EDTA(2.2 0 ± 0.63),然后是 0.2%壳聚糖(2.6 ± 0.51),然后是 NaOCL Extra(3.5 ± 0.53),CHX-Ultra(4.4 ± 0.52)和生理盐水(5.0 ± 0.00)的涂片层去除率最低。Pro-EDTA 组(12.8 ± 2.47)的显微硬度降低幅度最大,其次是 Biopure MTAD(8.01 ± 3.06)、0.2% 壳聚糖纳米颗粒(5.48 ± 2.87)、NaOCl-Extra(5.44 ± 1.62),CHX-Ultra(4.94 ± 1.43)和生理盐水(3.04 ± 0.63)的降低幅度最小。此外,含有表面活性剂和螯合剂的冲洗剂可增强涂抹层的去除效果,其中以 Biopure MTAD 的效果最佳。
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引用次数: 0
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Journal of oral biology and craniofacial research
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