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The Use of Micro-needling with Therapeutic Agents for Tissue Regeneration 微针疗法与治疗剂在组织再生中的应用
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100119
Courtney Morrow, Hannah Grach, Trina Hutto RDH, MS, EdD

OBJECTIVES

The purpose of this literature review is to analyze the current body of literature regarding the use of microneedling with a therapeutic agent, to encourage tissue regeneration and gingival health in the periodontium.

METHODS

The database used for this literature review was Google Scholar with Augusta University Library accessible articles. The keywords used to find these articles were micro-needling, tissue regeneration, periodontal tissue attachment, guided tissue regeneration, and therapeutic agents. The mesh terms used were needles, periodontitis, tissues, regeneration, and epithelial attachment with the word “AND” between. Articles that were older than five years were filtered out, leaving 428 articles. Then irrelevant articles were manually filtered out. Six articles were then selected, with one of the articles being a literature review used for background information.

RESULTS

Each article reviewed showed how micro-needling with therapeutic adjuncts can have a positive effect on the gingiva. These effects range from increased interdental papilla height, increased gingival thickness and collagen formation, decreased inflammation, and decreased severity of the destruction of the periodontal tissues. Micro-needling initiates a natural wound-healing process in the gingiva, and with the help of different therapeutic agents, positive results can be observed.

CONCLUSIONS

Each of the articles selected used a different agent and a different micro-needling procedure. The patient's needs and wants are determining factors in which therapeutic agent would be used to assist the micro-needling procedure. Future research is needed to compare additives and procedures, in addition to micro-needling. More long-term studies are necessary to determine the lasting effects on the periodontium and overall health of the patient. In conclusion, micro-needling seems to be a cost-effective, non-invasive treatment with noticeable improvement for tissue regeneration and gingival health, proving to show validity and worth in becoming an accepted practice and treatment option in dentistry.

IMPLICATIONS

Micro-needling with a therapeutic adjunct is an efficient way for dental practices to incorporate a minimally invasive treatment into a wide variety of different treatment regimens.

目的本文献综述旨在分析有关使用微针治疗剂促进牙周组织再生和牙龈健康的现有文献。方法本文献综述使用的数据库是谷歌学术,奥古斯塔大学图书馆可检索到相关文章。用于查找这些文章的关键词是微针、组织再生、牙周组织附着、引导组织再生和治疗剂。使用的网状词有针、牙周炎、组织、再生和上皮附着,中间有 "和 "字。筛选出超过五年的文章,剩下 428 篇。然后人工过滤掉无关的文章。结果查阅的每篇文章都显示了微针疗法与治疗辅助剂如何对牙龈产生积极影响。这些效果包括增加牙间乳头高度、增加牙龈厚度和胶原蛋白形成、减少炎症和降低牙周组织破坏的严重程度。微针疗法启动了牙龈的自然伤口愈合过程,在不同治疗剂的帮助下,可以观察到积极的效果。患者的需求和愿望是决定使用哪种治疗剂来辅助微针疗法的因素。未来的研究除了微针疗法外,还需要对添加剂和程序进行比较。还需要进行更多的长期研究,以确定微针疗法对牙周和患者整体健康的持久影响。总之,微针疗法似乎是一种经济有效、非侵入性的治疗方法,能明显改善组织再生和牙龈健康,证明了它的有效性和价值,是牙科界公认的一种治疗方法。
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引用次数: 0
Engineered Small Extra-Cellular Vesicles for Endogenous Mesenchymal Stem Cells Recruitment and in situ Periodontal Tissue Regeneration 用于内源性间充质干细胞招募和原位牙周组织再生的工程化细胞外小泡
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100113
Cathy Tran, Ranya Elsayed PhD MBA

OBJECTIVES

Exo released by immune-regulatory dendritic cells (regDCs) have been used as an effective nanodelivery system for the reprogramming of immune response at inflammatory bone defects in mice. This study aims to determine the efficacy of engineered SDF-1-loaded immune-regulatory DC-derived exosomes (SDF-1exo) in MSC recruitment and bone regeneration.

METHODS

Exo were purified from human and murine regDCs. Exo were loaded with SDF-1 using ultrasonication. In vitro studies of exo cargo including resistance of SDF-1 to proteolysis, MSC recruitment, and osteogenic differentiation were carried out. The therapeutic effect of SDF-1exo in hyaluronic acid-based hydrogel carrier was then tested in mandibular defects in a murine model. Five groups (n=5) were tested: group 1 (negative control), group 2 (carrier alone), group 3 (carrier with unloaded exo), group 4 (carrier with free SDF-1) and group 5 (carrier with SDF-1-exo). Biodistribution of DiI-prelabeled SDF-1-exo was performed using in-vivo imaging. Specimens were collected at 2- and 4-weeks post-operative. 3D volumetric micro-CT, histologic, qPCR, and IHC analyses were performed.

RESULTS

SDF-1exo protected its cargo against lysine gingipains and DPP4 proteolytic cleavage and promoted MSC migration, and osteogenesis. TEM revealed SDF-1 localization in the exo lumen and in the transmembrane domain. Blocking experiments revealed that sustainable SDF-1 signaling required interaction between SDF-1exo and CXCR4 receptor. In vivo, SDF-1exo showed a high affinity at the defect sites and sustained SDF-1 expression during the first 2 weeks of healing, promoting MSC migration. Significantly greater bone maturation in the SDF-1exo group was observed at 4 weeks.

CONCLUSIONS

This study demonstrated the efficacy of SDF-1exo delivery in promoting bone regeneration.

IMPLICATIONS

This study provides the basis for a novel natural nano-therapeutic strategy for periodontal tissue regeneration in humans.

目的免疫调节树突状细胞(regDCs)释放的外泌体已被用作一种有效的纳米递送系统,用于重新编程小鼠炎性骨缺损处的免疫反应。本研究旨在确定工程化SDF-1负载免疫调节DC衍生外泌体(SDF-1exo)在间充质干细胞招募和骨再生中的功效。用超声波将外泌体装入 SDF-1。对外显子货物进行了体外研究,包括SDF-1的抗蛋白水解性、间充质干细胞募集和成骨分化。然后在小鼠下颌骨缺损模型中测试了透明质酸水凝胶载体中 SDF-1exo 的治疗效果。测试共分五组(n=5):第 1 组(阴性对照)、第 2 组(单独载体)、第 3 组(不含外激素的载体)、第 4 组(含游离 SDF-1 的载体)和第 5 组(含 SDF-1-exo 的载体)。使用体内成像技术对 DiI 标记的 SDF-1-exo 进行生物分布。标本在术后2周和4周采集。结果SDF-1-exo能保护其载体不被赖氨酸鞘氨醇和DPP4蛋白水解,并促进间充质干细胞迁移和成骨。TEM显示了SDF-1在外膜腔和跨膜域的定位。阻断实验显示,可持续的SDF-1信号传导需要SDF-1exo与CXCR4受体之间的相互作用。在体内,SDF-1exo在缺损部位表现出很高的亲和力,并在愈合的头两周内维持SDF-1的表达,促进间充质干细胞的迁移。结论这项研究证明了 SDF-1exo 在促进骨再生方面的功效。
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引用次数: 0
SRC Phosphorylation of EPS8 Regulates SOX2 Expression and HNSCC Stemness EPS8 的 SRC 磷酸化调控 SOX2 表达和 HNSCC 干性
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100095
Harshit Singhania, Linah A. Shahoumi, W. Andrew Yeudall

OBJECTIVES

Epidermal growth factor receptor pathway substrate 8 (EPS8) is a key driver of head and neck squamous cell carcinogenesis (HNSCC). SOX2, a stem cell transcription factor, is overexpressed in high-grade HNSCC and is correlated with poor prognosis. We discovered that overexpression of EPS8 in HNSCC cells led to an increase in SOX2 expression because of increased transcription. EPS8 is phosphorylated by multiple upstream kinases, including SRC, and we found that the Y602 target site is key in regulating multiple oncogenic properties. However, the impact of these posttranslational modifications on cancer stemness is unknown. In this study, we investigated the effect of SRC phosphorylation of EPS8 on SOX2 expression and cancer stem cell properties.

METHODS

HNSCC cells expressing EPS8 mutants harboring phenylalanine substitutions at four SRC target sites (485/525/602/774; EPS8-F4), three sites (485/525/774; EPS8-F3) or at only one site (602; EPS8-Y602F) were used, with cells expressing low endogenous EPS8 or overexpressing wild-type EPS8 as controls. The effect of blocking SRC phosphorylation sites of EPS8 on SOX2 expression was determined by western blotting and RNA sequencing.

RESULTS

Blocking the four SRC phosphorylation sites (EPS8-F4), but not in EPS8-F3, resulted in significantly reduced SOX2 expression as compared to cells overexpressing wild-type EPS8. However, pharmacological inhibition of SRC activity increased SOX2 expression in the presence of wild-type EPS8 but not in its absence. RNA sequencing studies indicated that EPS8-F4 or EPS8-Y602F cells expressed significantly less SOX2 compared to cells overexpressing wild-type EPS8.

CONCLUSIONS

EPS8 expression and its phosphorylation by SRC regulate SOX2 expression. Studies also indicate a role for EPS8 and SOX2 in regulating HNSCC stemness.

IMPLICATIONS

HNSCC, one of the most prevalent cancers worldwide, is associated with a high mortality and recurrence rate, in part due to the presence of cancer stem cells (CSCs). Understanding the interplay between key molecules (EPS8, SRC and SOX2) involved in the development and maintenance of the HNSCC CSC phenotype will be pivotal in identifying effective therapeutic strategies.

目的表皮生长因子受体通路底物8(EPS8)是头颈部鳞状细胞癌变(HNSCC)的关键驱动因素。干细胞转录因子 SOX2 在高级别 HNSCC 中过表达,并与预后不良相关。我们发现,由于转录增加,EPS8在HNSCC细胞中的过表达会导致SOX2表达增加。EPS8 被包括 SRC 在内的多种上游激酶磷酸化,我们发现 Y602 靶点是调节多种致癌特性的关键。然而,这些翻译后修饰对癌症干性的影响尚不清楚。本研究中,我们研究了EPS8的SRC磷酸化对SOX2表达和癌症干细胞特性的影响。方法使用表达EPS8突变体的SHNSCC细胞,这些突变体在4个SRC靶位点(485/525/602/774;EPS8-F4)、3个位点(485/525/774;EPS8-F3)或仅在一个位点(602;EPS8-Y602F)上含有苯丙氨酸取代,并以表达低内源性EPS8或过表达野生型EPS8的细胞作为对照。结果与过表达野生型 EPS8 的细胞相比,阻断四个 SRC 磷酸化位点(EPS8-F4)(但不包括 EPS8-F3)会显著降低 SOX2 的表达。然而,药物抑制 SRC 活性可增加野生型 EPS8 存在时的 SOX2 表达,但在其缺失时则不会。RNA 测序研究表明,与过表达野生型 EPS8 的细胞相比,EPS8-F4 或 EPS8-Y602F 细胞表达的 SOX2 明显较少。研究还表明,EPS8和SOX2在调节HNSCC干性中发挥作用。 意义HNSCC是全球最常见的癌症之一,死亡率和复发率都很高,部分原因是存在癌症干细胞(CSCs)。了解参与 HNSCC CSC 表型发展和维持的关键分子(EPS8、SRC 和 SOX2)之间的相互作用,对于确定有效的治疗策略至关重要。
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引用次数: 0
Use of Clear Aligners with a Surgery-First Approach for Treatment of the Anterior Open Bite: A Systematic Review and Comparison with Conventional Fixed Appliances 使用透明矫治器和手术先行法治疗前开放性咬合:系统回顾及与传统固定矫治器的比较
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100098
Joshua Stewart DMD, Marshall F. Newman DMD, FAAP

OBJECTIVES

To complete a systematic review of the use of clear aligner therapy (CAT) when employing a surgery-first approach (SFA) to management of patients with an anterior open bite. To determine in patients undergoing surgery-first orthognathic surgery for treatment of an anterior open bite, is the use of clear aligners, compared to conventional fixed orthodontic appliances, as effective in the management of the anterior open bite with the primary outcome being residual anterior open bite. To provide a patient example demonstrating the use of SFA to orthognathic surgery and CAT approach to orthodontic management of an anterior open bite.

METHODS

A systematic review of the literature was undertaken for evaluation of available literature using the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P). Boolean operators “(clear aligner) AND (anterior open bite)”, “(clear aligner) AND (surgery-first),” and “(clear aligner) AND (orthognathic surgery)” were used. PRISMA flow diagram was used to identify, screen, and determine studies to be included in the review. The LEGEND Evidence Evaluation Tool was used to help evaluate validity, reliability and applicability and determine the evidence levels of each individual study. Studies that reported the use of CAT for management of anterior open bite without orthognathic surgery were not included. Studies that reported CAT in a surgery-first approach to manage patients without an anterior open bite were not included.

RESULTS

2 studies were included in this systematic review that reported the use of CAT in a surgery-first approach specifically for management of anterior open bite. One study, a retrospective study of 12 patients, found no residual anterior open bite at a 1 year of post-orthodontic follow up. The second, a case study, implemented twenty clear-aligner trays designed for crossbite correction and for passive movements post-operatively which, at the end of treatment, also functioned as ‘active retainers’ helping to prevent the relapse of the open bite.

CONCLUSIONS

The literature supports that CAT is as effective as traditional fixed orthodontic appliances when used in a surgery-first approach. Similarly, there is a body of evidence that supports the use of CAT to treat anterior open bite non-surgically. Based on the findings of this systematic review, there is growing supportive evidence to suggest that CAT can be used in a surgery-first approach to achieve predictable results specifically in management of the anterior open bite.

IMPLICATIONS

Clear aligners have obvious advantages compared with fixed appliances in terms of quality of life and esthetics and can be used following orthognathic surgery to correct an anterior open bite.

目的:对采用手术先行方法(SFA)治疗前开放性咬合患者时使用透明矫治器疗法(CAT)的情况进行系统回顾。确定在接受手术先行正颌手术治疗前牙开合咬合的患者中,与传统的固定矫正器相比,使用透明矫治器是否能有效治疗前牙开合咬合,其主要结果是残余前牙开合咬合。方法采用《系统综述和元分析首选报告项目协议》(PRISMA-P)对文献进行系统综述,以评估现有文献。使用布尔运算符"(透明矫治器)与(前开放性咬合)"、"(透明矫治器)与(先手术)"和"(透明矫治器)与(正颌手术)"。采用 PRISMA 流程图来识别、筛选和确定纳入综述的研究。LEGEND 证据评估工具用于帮助评估有效性、可靠性和适用性,并确定每项研究的证据等级。未纳入报告在未进行正颌手术的情况下使用 CAT 治疗前方开放性咬合的研究。本系统综述纳入了 2 项研究,这些研究报告了在手术先行方法中使用 CAT 专门治疗前方开放性咬合的情况。其中一项研究是对 12 名患者进行的回顾性研究,结果发现在正畸后 1 年的随访中没有发现残留的前牙开合咬合。第二项研究是一项病例研究,该研究使用了 20 个透明矫治托槽,这些托槽是为矫正交叉咬合和术后被动移动而设计的,在治疗结束时,这些托槽还可以作为 "主动保持器",帮助防止开牙合复发。同样,也有大量证据支持使用 CAT 非手术治疗前牙开合咬合。根据本系统综述的研究结果,越来越多的支持性证据表明,CAT 可用于手术先行方法,特别是在治疗前牙开合咬合方面,可取得可预测的效果。 意义与固定矫治器相比,透明矫治器在生活质量和美观方面具有明显优势,可在正颌手术后用于矫正前牙开合咬合。
{"title":"Use of Clear Aligners with a Surgery-First Approach for Treatment of the Anterior Open Bite: A Systematic Review and Comparison with Conventional Fixed Appliances","authors":"Joshua Stewart DMD,&nbsp;Marshall F. Newman DMD, FAAP","doi":"10.1016/j.dentre.2024.100098","DOIUrl":"10.1016/j.dentre.2024.100098","url":null,"abstract":"<div><h3>OBJECTIVES</h3><p>To complete a systematic review of the use of clear aligner therapy (CAT) when employing a surgery-first approach (SFA) to management of patients with an anterior open bite. To determine in patients undergoing surgery-first orthognathic surgery for treatment of an anterior open bite, is the use of clear aligners, compared to conventional fixed orthodontic appliances, as effective in the management of the anterior open bite with the primary outcome being residual anterior open bite. To provide a patient example demonstrating the use of SFA to orthognathic surgery and CAT approach to orthodontic management of an anterior open bite.</p></div><div><h3>METHODS</h3><p>A systematic review of the literature was undertaken for evaluation of available literature using the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P). Boolean operators “(clear aligner) AND (anterior open bite)”, “(clear aligner) AND (surgery-first),” and “(clear aligner) AND (orthognathic surgery)” were used. PRISMA flow diagram was used to identify, screen, and determine studies to be included in the review. The LEGEND Evidence Evaluation Tool was used to help evaluate validity, reliability and applicability and determine the evidence levels of each individual study. Studies that reported the use of CAT for management of anterior open bite without orthognathic surgery were not included. Studies that reported CAT in a surgery-first approach to manage patients without an anterior open bite were not included.</p></div><div><h3>RESULTS</h3><p>2 studies were included in this systematic review that reported the use of CAT in a surgery-first approach specifically for management of anterior open bite. One study, a retrospective study of 12 patients, found no residual anterior open bite at a 1 year of post-orthodontic follow up. The second, a case study, implemented twenty clear-aligner trays designed for crossbite correction and for passive movements post-operatively which, at the end of treatment, also functioned as ‘active retainers’ helping to prevent the relapse of the open bite.</p></div><div><h3>CONCLUSIONS</h3><p>The literature supports that CAT is as effective as traditional fixed orthodontic appliances when used in a surgery-first approach. Similarly, there is a body of evidence that supports the use of CAT to treat anterior open bite non-surgically. Based on the findings of this systematic review, there is growing supportive evidence to suggest that CAT can be used in a surgery-first approach to achieve predictable results specifically in management of the anterior open bite.</p></div><div><h3>IMPLICATIONS</h3><p>Clear aligners have obvious advantages compared with fixed appliances in terms of quality of life and esthetics and can be used following orthognathic surgery to correct an anterior open bite.</p></div>","PeriodicalId":100364,"journal":{"name":"Dentistry Review","volume":"4 3","pages":"Article 100098"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277255962400021X/pdfft?md5=07c20181869a9d0ac8922eb3e4a875a0&pid=1-s2.0-S277255962400021X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169401","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
Periodontitis Gingival Tissue Exosomes Cross and Compromise Human BBB in an In-Vitro 3D Model 牙周炎牙龈组织外泌体在体外三维模型中穿过并破坏人体 BBB
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100114
Tigerwin Yang, Ranya Elsayed PhD MBA

OBJECTIVES

The objective of this aim was to test the hypothesis that human gingival EXO from PD patients (PD-EXO) promote BMEC dysfunction and increase BBB permeability by degrading tight junction proteins, using a human in-vitro 3D BBB model.

METHODS

EXO purified from human gingiva (n=7) of stage III-IV, grade A/B PD (PD-EXO) and healthy subjects(con-EXO) (n=5) were characterized by NTA, TEM, WB, and multiplexed bead-based flow cytometry. DiI prelabeled PD-EXO or con-EXO and FITC dextran were added simultaneously to the luminal side (endothelial cells) of an in-vitro human 3D model of BBB (Neuromics,USA) and the media in the abluminal side (astrocytes and pericytes) was sampled for fluorescent measurement by plate reader at 0.5,4 and 24 hrs post-treatment. TEER was measured and tight junction proteins were examined using qPCR.

RESULTS

IL-1β and IL-6 were expressed in PD-EXO while not detected in con-EXO. PD-EXO significantly decreased TEER measurements at 0.5, 4, and 24 hrs post-treatment while FITC and DiI EXO fluorescent signals in the lower compartment (abluminal side) of the BBB were significantly increased with PD-EXO relative to con-EXO. Furthermore, there was a significant downregulation of tight junction mRNA gene expression claudin-1 and -4 in BBB BMECs with PD-EXO.

CONCLUSIONS

Using an in-vitro 3D model of BBB, our study illustrates that gingival EXO from PD patients could cross BBB and play a significant role in mediating a damaging effect on recipient BMECs of the BBB compromising its integrity. This suggests a novel mechanism of oral microbially induced EXO for AD risk.

IMPLICATIONS

These findings shed light on the possible mechanism behind the association between periodontitis and alzheimer's disease.

目的本研究的目的是利用人体体外三维 BBB 模型,检验来自 PD 患者的人类牙龈 EXO(PD-EXO)通过降解紧密连接蛋白促进 BMEC 功能障碍和增加 BBB 通透性的假设。方法通过NTA、TEM、WB和基于流式细胞仪的多重串珠法对从III-IV期、A/B级PD(PD-EXO)和健康受试者(con-EXO)(n=5)的人类牙龈(n=7)中纯化的PD-EXO进行表征。在体外人体三维 BBB 模型(Neuromics,美国)的管腔侧(内皮细胞)同时加入 DiI 预标记的 PD-EXO 或 con-EXO 和 FITC 右旋糖酐,并在处理后 0.5、4 和 24 小时取样管腔侧(星形胶质细胞和周细胞)的介质,用平板阅读器进行荧光测量。结果IL-1β和IL-6在PD-EXO中表达,而在Con-EXO中未检测到。PD-EXO能明显降低处理后0.5、4和24小时的TEER测量值,而相对于con-EXO,PD-EXO能明显增加BBB下部(腔侧)的FITC和DiI EXO荧光信号。结论通过体外三维 BBB 模型,我们的研究表明,PD 患者的牙龈 EXO 可穿过 BBB,并在介导对 BBB 受体 BMECs 的破坏性影响、损害其完整性方面发挥重要作用。这些发现揭示了牙周炎与阿尔茨海默病之间关联的可能机制。
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引用次数: 0
Oral Microbially Induced Exosomes promote Neuroinflammation and Microglial Cell Senescence 口腔微生物诱导的外泌体促进神经炎症和小胶质细胞衰老
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100110
Cayla Paradise, Ranya Elsayed PhD MBA

OBJECTIVES

Porphyromonas gingivalis (Pg) and its gingipain proteases contribute to Alzheimer's disease (AD) pathogenesis through yet unclear mechanisms. Cellular secretion of small extracellular vesicles or exosomes (exo) increases with aging as part of the senescence-associated secretory phenotype (SASP). We have shown that exo isolated from Pg-infected dendritic cells (PgDCexo) contain Pg antigens, transmit senescence to bystander gingival cells, and can cross the blood-brain barrier in mice. This study aims to determine the ability of PgDCexo to induce senescence and neuroinflammation in the brain using a microglial cell line in vitro.

METHODS

Isolated PgDCexo were quantitated and characterized using NTA, western blot (WB), and transmission electron microscopy (TEM). DiI labeled PgDCExo were co-cultured with murine SIMA9 microglial cells for 24 hrs, and uptake was analyzed by confocal microscopy. The effect of PgDCexo on microglial senescence and inflammation was tested using western blot, qPCR, and flow cytometry analysis (FACS).

RESULTS

DiI labeled PgDCexo were internalized in microglial cells. PgDCexo induced senescence in SIMA9 cells in a dose-dependent manner as shown by an increase in senescence biomarkers, p16 INK4A and P53 by WB and qPCR . SIMA9 cells treated with PgDCExo showed upregulated levels of IL-1β, TNFa and IL-6 by FACS and activated NLRP3 inflammasome pathway by WB.

CONCLUSIONS

Extracellular vesicles induced by P. gingivalis infection promote senescence and inflammation in microglial cells. These results suggest a potential role of Pg-induced extracellular vesicles in neuroinflammation and AD pathogenesis.

IMPLICATIONS

This study sheds light on a novel mechanism through which P.gingivalis-induced extracellular vesicles affect neurodegenerative processes in Alzheimer's disease.

目的牙龈卟啉单胞菌(Pg)及其龈蛋白酶是阿尔茨海默病(AD)的致病因素之一,其机制尚不清楚。作为衰老相关分泌表型(SASP)的一部分,细胞分泌的小细胞外囊泡或外泌体(exo)会随着衰老而增加。我们已经证明,从受 Pg 感染的树突状细胞(PgDCexo)中分离出的外泌体含有 Pg 抗原,能将衰老传递给旁观的牙龈细胞,并能穿过小鼠的血脑屏障。本研究旨在利用体外小胶质细胞系确定 PgDCexo 诱导大脑衰老和神经炎症的能力。方法利用 NTA、Western 印迹(WB)和透射电子显微镜(TEM)对溶解的 PgDCexo 进行定量和表征。将标记了 DiI 的 PgDCexo 与小鼠 SIMA9 微神经胶质细胞共培养 24 小时,并通过共聚焦显微镜分析其吸收情况。结果DiI标记的PgDCexo在小胶质细胞中被内化。PgDCexo 以剂量依赖的方式诱导 SIMA9 细胞衰老,通过 WB 和 qPCR 分析衰老生物标志物 p16 INK4A 和 P53 的增加可以证明这一点。用PgDCExo处理的SIMA9细胞通过FACS显示IL-1β、TNFa和IL-6水平上调,通过WB显示NLRP3炎性体通路激活。这些结果表明,牙龈脓疱病诱导的细胞外囊泡在神经炎症和阿尔茨海默病发病机制中可能发挥作用。
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引用次数: 0
Novel Suture Technique to Stabilize Vestibule for a Double Laterally Positioned Flap 稳定双侧定位皮瓣前庭的新型缝合技术
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100138
Kevin A. Shepherd, Mira Ghaly DMD MS

OBJECTIVES

The goal of treatment is to establish a band of attached keratinized tissue to facilitate pain free oral hygiene and to eliminate the muscle attachment in order to help mitigate future recession.

METHODS

A 62yo white female presented with RT2 recession on teeth numbers 24,25. Due to extensive use of antiplatelet medication, the decision to limit surgical sites to one was made, ruling out free tissue grafts. The surgical plan consisted of preparing two partial thickness flaps and securing them over the deficient sites of 24,25. To maintain good adaptation of the flap to the periosteum, a 4.0 PTFE suture was used to secure the flaps by using the adjacent periosteum and teeth as anchors points. To obtain hemostasis, microfibrillar collagen was used directly on the site. The patient was followed up at one week and one month for post operative evaluation.

RESULTS

The evaluation at one month revealed elimination of the aberrant frenum and the re-establishment of a 4mm healthy band of attached keratinized tissue. During the healing there was no evidence of any flap necrosis as the flap was adequately secured against the periosteum.

CONCLUSIONS

Using the Periosteal-Tooth Anchor suture technique, the laterally positioned flaps were able to be secured in a manner that ensured survivability of the flaps and established a band of attached keratinized gingiva.

IMPLICATIONS

By informing clinicians of this suture technique, it will improve the predictability of these demanding and technique sensitive cases.

治疗的目的是建立一个附着角化组织带,以方便无痛口腔卫生,并消除肌肉附着,以帮助减轻未来的退缩。由于广泛使用抗血小板药物,决定将手术部位限制在一个,排除了游离组织移植的可能性。手术计划包括制备两个部分厚度的皮瓣,并将其固定在 24、25 号牙的缺损部位。为了保持皮瓣与骨膜的良好适应性,使用了 4.0 聚四氟乙烯缝合线,以邻近的骨膜和牙齿作为锚点来固定皮瓣。为达到止血目的,直接在该部位使用了微纤维胶原蛋白。术后一周和一个月对患者进行了随访评估。结果一个月后的评估显示,畸形龈沟已经消失,重新形成了一条 4 毫米的健康角化组织附着带。结论通过使用骨膜-牙锚缝合技术,侧位皮瓣的固定方式确保了皮瓣的存活率,并建立了一条附着的角化牙龈带。
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引用次数: 0
Do Silver Nanoparticles in Fixed Orthodontic Appliances Inhibit Bacterial Growth? 固定矫治器中的纳米银粒子能抑制细菌生长吗?
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100120
Kailyn Owens, Anasha Williamson, Ashley Christman RDH, BS

OBJECTIVES

The purpose of this literature review is to aid in oral hygiene instruction for clinicians with patients undergoing orthodontic treatment.

METHODS

Specific criteria were required to formulate this literature review. Articles were accessed through PubMed and were peer-reviewed, original research that were published within the last five years, and relevant to the topic. Keywords for this research included orthodontics, fixed orthodontic appliances, orthodontic appliances, silver nanoparticles, silver coating, nanoparticles, bioreduction, oral bioreduction, and plaque reduction. A section from one published book was also referenced for background and comparative information. Filters for our search excluded articles posted before 2018, literature reviews, meta-analyses, or articles that were not peer reviewed. Four articles were selected to be included in this review.

RESULTS

Fabricated wires, brackets, and orthodontic bands were organized into control and experimental groups. In some groups, the metal was coated with silver nanoparticles, some had zinc oxide nanoparticles, and some were left uncoated. The appliances were exposed to oral bacteria for various amount of time and then tested to see which metals accumulated the most bacteria. In one study, a combination of silver and zinc-oxide nanoparticles produced the greatest bacterial inhibition. However, each study proved silver nanoparticle coated appliances resulted in the least amount of bacterial accumulation with all bacteria tested.

CONCLUSIONS

The reduction of plaque, bacteria, gingivitis, and bracket scars during and after orthodontic treatment is a direct result of silver nanoparticles and increases patient compliance to commit to an oral hygiene routine.

IMPLICATIONS

Silver nanoparticles can be implemented throughout all aspects of dentistry in toothpastes, mouthwashes, and other dentifrices. Hygienists, dental professionals, and patients can benefit from the antimicrobial effects of silver nanoparticles.

目的本文献综述的目的是帮助临床医生对接受正畸治疗的患者进行口腔卫生指导。方法制定本文献综述需要特定的标准。通过 PubMed 获取的文章均经过同行评审,是在过去五年内发表的原创性研究,且与主题相关。研究关键词包括正畸、固定正畸装置、正畸装置、纳米银颗粒、银涂层、纳米颗粒、生物还原、口腔生物还原和减少牙菌斑。此外,我们还参考了一本已出版书籍中的部分内容,以获取背景和比较信息。我们的搜索筛选排除了 2018 年之前发布的文章、文献综述、荟萃分析或未经同行评审的文章。结果制造的钢丝、托槽和正畸带被分为对照组和实验组。有些组的金属上涂有纳米银粒子,有些组的金属上涂有纳米氧化锌粒子,有些组则没有涂上任何纳米银粒子。这些器具暴露在口腔细菌中的时间长短不一,然后进行测试,看哪种金属积累的细菌最多。在一项研究中,银和纳米氧化锌颗粒的组合产生了最大的细菌抑制效果。结论在正畸治疗期间和之后,银纳米粒子能直接减少牙菌斑、细菌、牙龈炎和托槽疤痕,并提高患者对口腔卫生常规的依从性。卫生学家、牙科专业人员和患者都能从纳米银粒子的抗菌效果中获益。
{"title":"Do Silver Nanoparticles in Fixed Orthodontic Appliances Inhibit Bacterial Growth?","authors":"Kailyn Owens,&nbsp;Anasha Williamson,&nbsp;Ashley Christman RDH, BS","doi":"10.1016/j.dentre.2024.100120","DOIUrl":"10.1016/j.dentre.2024.100120","url":null,"abstract":"<div><h3>OBJECTIVES</h3><p>The purpose of this literature review is to aid in oral hygiene instruction for clinicians with patients undergoing orthodontic treatment.</p></div><div><h3>METHODS</h3><p>Specific criteria were required to formulate this literature review. Articles were accessed through PubMed and were peer-reviewed, original research that were published within the last five years, and relevant to the topic. Keywords for this research included orthodontics, fixed orthodontic appliances, orthodontic appliances, silver nanoparticles, silver coating, nanoparticles, bioreduction, oral bioreduction, and plaque reduction. A section from one published book was also referenced for background and comparative information. Filters for our search excluded articles posted before 2018, literature reviews, meta-analyses, or articles that were not peer reviewed. Four articles were selected to be included in this review.</p></div><div><h3>RESULTS</h3><p>Fabricated wires, brackets, and orthodontic bands were organized into control and experimental groups. In some groups, the metal was coated with silver nanoparticles, some had zinc oxide nanoparticles, and some were left uncoated. The appliances were exposed to oral bacteria for various amount of time and then tested to see which metals accumulated the most bacteria. In one study, a combination of silver and zinc-oxide nanoparticles produced the greatest bacterial inhibition. However, each study proved silver nanoparticle coated appliances resulted in the least amount of bacterial accumulation with all bacteria tested.</p></div><div><h3>CONCLUSIONS</h3><p>The reduction of plaque, bacteria, gingivitis, and bracket scars during and after orthodontic treatment is a direct result of silver nanoparticles and increases patient compliance to commit to an oral hygiene routine.</p></div><div><h3>IMPLICATIONS</h3><p>Silver nanoparticles can be implemented throughout all aspects of dentistry in toothpastes, mouthwashes, and other dentifrices. Hygienists, dental professionals, and patients can benefit from the antimicrobial effects of silver nanoparticles.</p></div>","PeriodicalId":100364,"journal":{"name":"Dentistry Review","volume":"4 3","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772559624000439/pdfft?md5=c6b7415d334b63a4bbfcedc08db14471&pid=1-s2.0-S2772559624000439-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169229","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
The Effects Of Enamel Matrix Derivative On Periodontal Patients 釉质基质衍生物对牙周病患者的影响
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100102
Abbi Rushton, Maddie White, Krystal Herring RDH, MPH

OBJECTIVES

The purpose of this literature review was to describe enamel matrix derivative (EMD) and how it benefits periodontal patients. EMD's rejuvenating abilities were identified as well as the different functions of EMD.

METHODS

Articles chosen for this literature review were randomized control trials that were peer reviewed and published within the last five years. PubMed was accessed through Augusta University's database for research. Keywords used to search included enamel matrix derivative, bone loss, periodontitis, enamel matrix proteins, gum disease, regeneration, therapy, and growth.

RESULTS

Studies chosen for this literature review all showed that EMD improves clinical attachment level. It is able to promote hard and soft tissue regeneration because it contains the same proteins that are involved in amelogenesis. These proteins stimulate fibroblasts, anti-inflammatory cytokines, and clotting factors. All these factors make EMD a great adjunct to periodontal surgical procedures. EMD is also able to reduce inflammation, promote wound healing, and stabilize blood clots.

CONCLUSIONS

Overall, EMD's ability to assist in the formation of new bone, cementum, and periodontal ligaments makes it an excellent treatment option for periodontally involved patients. It is frequently used with scaling and root planing, flap surgery, and the treatment of infrabony defects.

目的本文献综述旨在描述釉质基质衍生物(EMD)及其对牙周病患者的益处。方法本次文献综述选择的文章都是在过去五年内发表的经过同行评审的随机对照试验。通过奥古斯塔大学的研究数据库访问了 PubMed。搜索关键词包括釉质基质衍生物、骨质流失、牙周炎、釉质基质蛋白、牙龈疾病、再生、治疗和生长。结果本次文献综述选择的研究均表明,EMD 可改善临床附着水平。它能够促进硬组织和软组织的再生,因为它含有参与釉质生成的相同蛋白质。这些蛋白质可刺激成纤维细胞、抗炎细胞因子和凝血因子。所有这些因素都使 EMD 成为牙周手术的最佳辅助疗法。总之,EMD 能够帮助形成新骨、骨水泥和牙周韧带,是牙周病患者的最佳治疗选择。它经常与洗牙、根面平整、翻瓣手术和骨缺损治疗一起使用。
{"title":"The Effects Of Enamel Matrix Derivative On Periodontal Patients","authors":"Abbi Rushton,&nbsp;Maddie White,&nbsp;Krystal Herring RDH, MPH","doi":"10.1016/j.dentre.2024.100102","DOIUrl":"10.1016/j.dentre.2024.100102","url":null,"abstract":"<div><h3>OBJECTIVES</h3><p>The purpose of this literature review was to describe enamel matrix derivative (EMD) and how it benefits periodontal patients. EMD's rejuvenating abilities were identified as well as the different functions of EMD.</p></div><div><h3>METHODS</h3><p>Articles chosen for this literature review were randomized control trials that were peer reviewed and published within the last five years. PubMed was accessed through Augusta University's database for research. Keywords used to search included enamel matrix derivative, bone loss, periodontitis, enamel matrix proteins, gum disease, regeneration, therapy, and growth.</p></div><div><h3>RESULTS</h3><p>Studies chosen for this literature review all showed that EMD improves clinical attachment level. It is able to promote hard and soft tissue regeneration because it contains the same proteins that are involved in amelogenesis. These proteins stimulate fibroblasts, anti-inflammatory cytokines, and clotting factors. All these factors make EMD a great adjunct to periodontal surgical procedures. EMD is also able to reduce inflammation, promote wound healing, and stabilize blood clots.</p></div><div><h3>CONCLUSIONS</h3><p>Overall, EMD's ability to assist in the formation of new bone, cementum, and periodontal ligaments makes it an excellent treatment option for periodontally involved patients. It is frequently used with scaling and root planing, flap surgery, and the treatment of infrabony defects.</p></div>","PeriodicalId":100364,"journal":{"name":"Dentistry Review","volume":"4 3","pages":"Article 100102"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772559624000257/pdfft?md5=21c602bb1af224ea6d00b2b2e5169413&pid=1-s2.0-S2772559624000257-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169312","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
Transcriptome analysis identifies CCDC86 as a new potential Head and Neck Squamous Cell Carcinoma biomarker 转录组分析发现 CCDC86 是一种新的潜在头颈部鳞状细胞癌生物标记物
Pub Date : 2024-09-01 DOI: 10.1016/j.dentre.2024.100105
Daniel Lee, Jules Gouron, Jules Gouron, Henrique Shimaoka Chagas, Bidhan Bhandari, Sahar Emami Naeini, Babak Baban, Pablo Shimaoka Chagas, Evila Salles

OBJECTIVES

Overall, this comprehensive analysis aims to evaluate the expression profile of CCDC86 in Head and Neck Squamous Cell Carcinoma, providing insights into its potential as a diagnostic biomarker.

METHODS

Initially, we conducted transcriptomic integration analysis to examine CCDC86 expression in HNSCC using various datasets (RNA-seq) obtained from the gene expression profiling interactive analysis database. We also established the diagnostic significance of CCDC86 and coregulated genes in HNSCC through the Kaplan–Meier Plotter.

RESULTS

Initially, we detected elevated levels of CCDC86 in HNSCC, which correlated with lower survival rates (p=<0.001). We also identified seven genes coregulated with CCDC86 that were also overexpressed in HNSCC in comparison with normal tissues.

CONCLUSIONS

For the first time, our findings suggest that CCDC86 can be a new emerging biomarker with promising therapeutic values to HNSCC patients.

IMPLICATIONS

No further implications other than specified in conclusion.

方法最初,我们利用从基因表达谱交互式分析数据库中获得的各种数据集(RNA-seq)进行了转录组整合分析,以检测 CCDC86 在 HNSCC 中的表达。我们还通过 Kaplan-Meier Plotter 确定了 CCDC86 和核心相关基因在 HNSCC 中的诊断意义。结果最初,我们在 HNSCC 中检测到 CCDC86 水平升高,这与较低的生存率相关(p=<0.001)。结论我们的研究结果首次表明,CCDC86可作为一种新兴的生物标记物,对HNSCC患者具有良好的治疗价值。
{"title":"Transcriptome analysis identifies CCDC86 as a new potential Head and Neck Squamous Cell Carcinoma biomarker","authors":"Daniel Lee,&nbsp;Jules Gouron,&nbsp;Jules Gouron,&nbsp;Henrique Shimaoka Chagas,&nbsp;Bidhan Bhandari,&nbsp;Sahar Emami Naeini,&nbsp;Babak Baban,&nbsp;Pablo Shimaoka Chagas,&nbsp;Evila Salles","doi":"10.1016/j.dentre.2024.100105","DOIUrl":"10.1016/j.dentre.2024.100105","url":null,"abstract":"<div><h3>OBJECTIVES</h3><p>Overall, this comprehensive analysis aims to evaluate the expression profile of CCDC86 in Head and Neck Squamous Cell Carcinoma, providing insights into its potential as a diagnostic biomarker.</p></div><div><h3>METHODS</h3><p>Initially, we conducted transcriptomic integration analysis to examine CCDC86 expression in HNSCC using various datasets (RNA-seq) obtained from the gene expression profiling interactive analysis database. We also established the diagnostic significance of CCDC86 and coregulated genes in HNSCC through the Kaplan–Meier Plotter.</p></div><div><h3>RESULTS</h3><p>Initially, we detected elevated levels of CCDC86 in HNSCC, which correlated with lower survival rates (p=&lt;0.001). We also identified seven genes coregulated with CCDC86 that were also overexpressed in HNSCC in comparison with normal tissues.</p></div><div><h3>CONCLUSIONS</h3><p>For the first time, our findings suggest that CCDC86 can be a new emerging biomarker with promising therapeutic values to HNSCC patients.</p></div><div><h3>IMPLICATIONS</h3><p>No further implications other than specified in conclusion.</p></div>","PeriodicalId":100364,"journal":{"name":"Dentistry Review","volume":"4 3","pages":"Article 100105"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772559624000282/pdfft?md5=38c1a1f72a7925c967bf13070598fd5e&pid=1-s2.0-S2772559624000282-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169313","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
期刊
Dentistry Review
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