Journal of Applied Oral Science最新文献

{"title":"Generalized gingivitis-related salivary proteomic profile in pregnant women with obesity: insights into biological mechanisms assessed by Tandem Mass Spectrometry.","authors":"Laura Teodoro de Marchi, Amanda Borges Pirondi, Talita Mendes Oliveira Ventura, Larissa Tercilia Grizzo, Marília Afonso Rabelo Buzalaf, Gerson Aparecido Foratori-Junior","doi":"10.1590/1678-7757-2025-0031","DOIUrl":"https://doi.org/10.1590/1678-7757-2025-0031","url":null,"abstract":"<p><strong>Aim: </strong>This cross-sectional study investigated the salivary proteomic profile associated with generalized gingivitis in pregnant women with obesity.</p><p><strong>Methodology: </strong>Pregnant women in the third trimester (≥27 weeks of gestation) were divided into two groups based on bleeding on probing (BOP): G1 (BOP>50%; n=9) and G2 (BOP 0-30%; n=9). Collected unstimulated saliva samples were individually analyzed using nano liquid chromatography electron spray ionization tandem mass spectrometry. Identified proteins were classified according to gene ontology for biological processes, molecular functions, immune system involvement, and cellular components. Differential protein expression was determined using thresholds of p<0.05 for downregulation and 1-p>0.95 for up-regulation proteins.</p><p><strong>Results: </strong>Of the 183 identified proteins, 100 were shared between groups, totaling 57 up-regulated and 27 downregulated proteins in G1. Key biological processes included antimicrobial humoral response and hydrogen peroxide catabolism, with proteins linked to immune function and endopeptidase regulation. Functional analysis showed that Lactotransferrin (5-fold increase in G1), Haptoglobin (4-fold), and Immunoglobulin J chain (3-fold) were up-regulated, whereas Statherin (5-fold) and Protein S100-A8 (4-fold) were downregulated in G1.</p><p><strong>Conclusions: </strong>Pregnant women with obesity and generalized gingivitis exhibited a distinct salivary proteomic profile characterized by the up-regulation of immune-related proteins and downregulation of tissue-protective proteins. These findings suggest potential salivary biomarkers for detection and targeted management of periodontal inflammation in this high-risk population.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20250031"},"PeriodicalIF":2.2,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144078265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nasopalatine duct cyst: a multicenter retrospective study of 63 cases and an integrative review of the clinical, imaginological and histopathological aspects.","authors":"Diana Estefania Ramos Peña, Mariana de Sá Alves, Samuel Porfírio Xavier, Tiago Novaes Pinheiro, Paulo Sérgio da Silva Santos, Izabel Regina Fischer Rubira-Bullen, Ana María Cadavid Giraldo, Pilar Schmitt Sanjuan Navarro, Leonor Victoria González-Pérez, Cintia Micaela Chamorro Petranacci, Mario Perez-Sayáns, Ana Lia Anbinder, Janete Dias Almeida, Ana Carolina Fragoso Motta","doi":"10.1590/1678-7757-2024-0539","DOIUrl":"https://doi.org/10.1590/1678-7757-2024-0539","url":null,"abstract":"<p><strong>Introduction: </strong>The nasopalatine duct cyst (NPDC) is the most common nonodontogenic jaw cyst, with a higher prevalence reported in males. Diagnosing jaw cysts remains challenging for general dentists due to their overlapping clinical and radiographic presentations. An updated case series and integrative literature review may assist in improving the accurate diagnosis of NPDC.</p><p><strong>Objective: </strong>This study aimed to describe the clinicopathological and imaging characteristics of 63 NPDC cases and to review previously reported cases in the literature.</p><p><strong>Methodology: </strong>An international, multicenter, retrospective NPDC case series was conducted. Demographic, radiographic, and histopathological data were collected from clinical records. Additionally, a PubMed/MEDLINE search was performed to identify articles on NPDC.</p><p><strong>Results: </strong>A total of 63 NPDC cases were evaluated, with a mean patient age of 47 years and no significant sex predilection. Twenty-one cases were asymptomatic, while 34 presented with symptoms such as pain and swelling. Radiographically, NPDC appeared as a well-defined radiolucent lesion located between the upper central incisors, bordered by a radiopaque margin. The integrative literature review identified 67 studies, comprising 51 case reports, 12 retrospective studies, and four case series, totaling 1,003 reported NPDC cases. The clinicopathological and radiographic findings from the literature aligned with those in this case series.</p><p><strong>Conclusion: </strong>The 63 cases analyzed in this study showed consistent findings across six international centers, with no sex predilection observed, contrasting with the male dominance reported in the literature. NPDC should be considered in the differential diagnosis of intraosseous lesions in the anterior maxilla. Accurate diagnosis requires a combination of radiographic and histopathological evaluations to prevent misdiagnosis and improper treatment.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240539"},"PeriodicalIF":2.2,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144019608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acquired pellicle engineering: a fascinating approach to prevent demineralization.","authors":"Carolina Ruis Ferrari, Matthias Hannig, Marília Afonso Rabelo Buzalaf","doi":"10.1590/1678-7757-2024-0359","DOIUrl":"https://doi.org/10.1590/1678-7757-2024-0359","url":null,"abstract":"<p><p>The acquired enamel pellicle (AEP) consists of an organic, acellular, and bacteria-free film, formed in vivo as a result of biomolecules adsorption onto the tooth surface. It is composed of proteins, glycoproteins, lipids, phospholipids, and other macromolecules, such as carbohydrates. The AEP formation process is complex and can be divided into three stages: initiation, development, and maturation. The pellicle has two main layers: the globular and basal layers. The basal layer offers the most protection against demineralization, as the subsequent globular layer is weaker and less tenacious. The formation of the AEP can be influenced by various factors, such as the physicochemical properties of the teeth, location in the oral cavity, pathologies, and even the oral microbiota. With the advancement of \"omics\" techniques, it has been possible to observe the presence of acid-resistant proteins in the AEP, which allowed the development of the \"acquired pellicle engineering\" strategy. This strategy involves enriching and modifying the basal layer with acid-resistant proteins. Among these proteins, hemoglobin, statherin-derived peptide, and a protein derived from sugarcane stand out. The objective of this literature review is to provide a comprehensive overview of the AEP, detailing its composition, formation process, and protective functions. Additionally, the review aims to explore recent advances in the field of \"acquired pellicle engineering,\" highlighting the acid-resistant proteins of the AEP and their potential applications in dentistry. Finally, the review intends to highlight the clinical implications of these findings and how they may contribute to the development of new strategies for the prevention and treatment of dental pathologies according to published studies.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240359"},"PeriodicalIF":2.2,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144007828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifying metabolic biomarkers and pathways in pulpitis: a metabolomic study using ultra-high-performance liquid chromatography/orbitrap mass spectrometry.","authors":"Congpeng Wen, Xueqin Chen, Linfeng Lai","doi":"10.1590/1678-7757-2024-0428","DOIUrl":"https://doi.org/10.1590/1678-7757-2024-0428","url":null,"abstract":"<p><strong>Background: </strong>Pulpitis, which is often triggered by caries and trauma, is a significant clinical challenge due to its prevalence. This research aims to uncover potential metabolic biomarkers for pulpitis and map out the implicated metabolic pathways, thereby laying a foundation for enhanced diagnostic and preventive strategies.</p><p><strong>Methodology: </strong>We analyzed pulp samples from 12 participants (six who had pulpitis and six who had healthy teeth) using serum metabolomics via ultra-high-performance liquid chromatography coupled with Orbitrap mass spectrometry. Important biomarkers were pinpointed via multivariate analysis and orthogonal partial least squares discriminant analysis. Additionally, correlation and biomarker pathway enrichment analyses were conducted to explore the relations between differentially expressed biomarkers and their associated biological pathways. Specific metabolites of interest were further examined via alkaline phosphatase (ALP) staining, Alizarin Red staining, and RT-qPCR analysis.</p><p><strong>Results: </strong>We identified 22 significant biomarkers (13 increased, nine decreased) related to 18 metabolic pathways in pulpitis cases. Key biomarkers included ascorbic acid, inosine, allopurinol riboside, and L-asparagine, in which ascorbic acid and inosine showed the most substantial downregulation and strongest association with pulpitis. Notably, aminoacyl-tRNA biosynthesis and retrograde endocannabinoid signaling pathways were closely linked with pulpitis. Ascorbic acid enhanced the osteogenic differentiation, calcium deposition, as well as the expression of osteogenic genes of human dental pulp stem cells (DPSCs).Conclusions: The identified biomarkers and metabolic pathways offer insights into the pathogenesis of pulpitis and have potential applications in developing preventive treatments.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240428"},"PeriodicalIF":2.2,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061451/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144025973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between dental fracture and amalgam restoration: a case-control study.","authors":"Luana Dos Santos Souza, Victor Ruano, Rafael Santos Rocha, Eduardo Varanda, Taciana Marco Ferraz Caneppele, Eduardo Bresciani","doi":"10.1590/1678-7757-2024-0467","DOIUrl":"https://doi.org/10.1590/1678-7757-2024-0467","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the possible clinical association between dental fracture and the presence of amalgam restorations, including other restorative treatments in the control group. The potential association of fractures with dental wear facets and the restoration size was also assessed as a secondary objective.</p><p><strong>Methodology: </strong>Patients with fractured teeth restored with silver amalgam or not were included as the case group (n=25). The control group, with non-fractured teeth, was selected after considering the case group aspects, with twice as many patients (n=50) with posterior teeth sound or restored (amalgam, composite resin, or another restorative material). For both groups, the type of restorative material, extension of the restorations, remaining tooth structure, and the presence or absence of wear facets were analyzed. The teeth were impressed with alginate, and from the plaster models, the extent of fractures or restorations was measured by two calibrated examiners with a digital caliper at the cervico-occlusal and bucco-lingual directions. The data were subjected to the Chi-square test (5%) and odds ratio.</p><p><strong>Results: </strong>There was no statistical difference between the presence or absence of amalgam restorations regarding the risk of tooth fracture. Regarding fractures larger than 3.5mm, the chances of failure are 0.53 for amalgam restorations with no statistical differences (p=0.433), and, regarding the presence of wear facets, the odds ratio of failure is 1.357 for amalgam restorations (p=0.65).</p><p><strong>Conclusion: </strong>It can be deduced that, within the conditions of the study, no discernible association exists between dental fractures and the presence of silver amalgam restorations.Clinical Trial Register: (ReBEC) UNT code U1111-1215-7255.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240467"},"PeriodicalIF":2.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12014111/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143991529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chitosan nanoparticles suspension can minimize enamel loss after in vitro erosive challenge.","authors":"Renata Cristina Sobreira França, Rebeca Tibau Aguiar Dias, Ranam Moreira Reis, Frederico Barbosa de Sousa, Hugo Lemes Carlo, Rogerio Lacerda Dos Santos, Fabíola Galbiatti de Carvalho","doi":"10.1590/1678-7757-2024-0445","DOIUrl":"https://doi.org/10.1590/1678-7757-2024-0445","url":null,"abstract":"<p><strong>Background: </strong>Chitosan nanoparticles suspension (ChNPs) showed antimicrobial effects in the oral cavity, but its effects on enamel erosion prevention remain little explored.</p><p><strong>Objective: </strong>This study synthesized ChNPs and evaluated their effect on enamel after erosive challenge.</p><p><strong>Design: </strong>ChNPs were synthesized by ionic gelation and characterized using scanning electron microscopy (SEM), infrared spectrophotometry (FTIR), dynamic light scattering methods (DLS) and zeta potential (ZP). In total, 56 human enamel blocks were divided into four groups (n=14/group): (i) ChNPs suspension (4.4mg/mL); (ii) 0.05% sodium fluoride solution (NaF); (iii) chitosan solution (5.0 mg/mL); and (iv) distilled water. After incubation in freshly collected human saliva (3h), the samples were exposed to erosive challenge in 1% citric acid (90s) and remineralizing solution (2h) performed four times a day. After the 1st and 4th acid exposures, solutions were applied for 2 min. After 7 days, % Vickers surface hardness change (% SMH) was obtained using 300 g load applied for 15s. Enamel surface loss was evaluated using optical profilometer by subtracting the final profile values from baseline ones. Data were analyzed by ANOVA and post-hoc T tests (α=0.05). Surface topography was obtained by optical profilometer.</p><p><strong>Results: </strong>SEM revealed the formation of spherical nanoparticles. DLS showed nanoparticles with 85.7±10.5 nm diameter and ZP value of +45.5±5.4mV. Enamel surface loss was significantly lower in ChNPs and NaF groups, exhibiting a less rough surface in the treated areas. ChNPs, NaF and chitosan groups showed lower % SMH values.</p><p><strong>Conclusions: </strong>ChNPs suspension minimized enamel loss after in vitro erosive challenge and appears to be a promising material for enamel erosion prevention.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240445"},"PeriodicalIF":2.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12014109/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143968004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of volumetric wear loss and pain scores of the digitally and conventionally manufactured occlusal splints for individuals with sleep bruxism.","authors":"Sevda Miray Soydaş Smail, Zeliha Şanivar Abbasgholizadeh, Erkut Kahramanoğlu","doi":"10.1590/1678-7757-2025-0052","DOIUrl":"10.1590/1678-7757-2025-0052","url":null,"abstract":"<p><strong>Introduction: </strong>According to the latest international consensus in 2018, sleep bruxism is the activity of the masticatory muscles during sleep characterized by rhythmic or non-rhythmic teeth clenching or grinding. Regarding its harmful effects, bruxism is considered one of the predisposing factors of tooth wear and temporomandibular joint diseases. Occlusal splint therapy is the most frequently used treatment for minimizing these harmful effects.</p><p><strong>Objectives: </strong>This study compared the volumetric wear loss and pain scores between digitally and conventionally manufactured occlusal splints for individuals with sleep bruxism.</p><p><strong>Methodology: </strong>A total of 30 individuals diagnosed with sleep bruxism were selected following the inclusion criteria and randomly divided into two groups. Pain scores were subjectively reported using a visual analog scale. Volumetric wear loss of the occlusal splint surface was measured using the Geomagic software. Data were analyzed with SPSS version 25.0.</p><p><strong>Results: </strong>At the six-month follow-up, conventionally manufactured splints (103.53±41.23) showed a volumetric loss significantly higher than that the digital ones (62.33±26.29) (p=0.005). We found no significant difference between the two splint types regarding VAS scores.</p><p><strong>Conclusion: </strong>Occlusal splint wear can gradually alter the balance of occlusal contact and potentially reduce its therapeutic effectiveness, highlighting the importance of using wear-resistant materials. Our findings indicate that digital manufacturing processes provide advantages due to their long-term clinical outcomes.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20250052"},"PeriodicalIF":2.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12014110/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143764001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Protective effect of adenosine triphosphate against cisplatin-induced necrotic and degenerative oral mucositis in rats.","authors":"Ismail Salcan, Muhammed Dilber, Zeynep Suleyman, Nurinisa Yucel, Sara Salcan, Sefa Kesan, Gulce Naz Yazici, Fatih Celik, Merve Koseturk, Nurdan Alcan Alp, Halis Suleyman","doi":"10.1590/1678-7757-2025-0007","DOIUrl":"10.1590/1678-7757-2025-0007","url":null,"abstract":"<p><strong>Background: </strong>Inflammation, oxidative damage, and adenosine triphosphate (ATP) depletion play a role in the pathogenesis of cisplatin (CIS)-induced oral mucositis.</p><p><strong>Objective: </strong>The purpose of this research is to examine the impact of ATP against potential oral mucositis development in cisplatin-treated rats. Methodology All rats were randomly assigned to four groups, namely healthy control group (HG), ATP group (ATPG), Cisplatin group (CISG), and ATP + Cisplatin group (ATCS). Firstly, ATP 4 mg/kg was administered via intraperitoneal injection (IP) to both ATPG and ATCS groups. The same volume of normal saline was injected into HG and CISG groups. After 1 h, cisplatin 5 mg/kg was administered via IP to CISG and ATCS groups. The drugs were taken 1x1 for 7 d. Later, tongue tissues were collected from all groups. Biochemical, macroscopic, and histopathological examinations were performed on all tissues.</p><p><strong>Results: </strong>ATP inhibited cisplatin-induced oxidative damage and pro-inflammatory cytokines levels in tongue tissue. In the CIS group, a significant number of distinct sulcus formations were found in the apex and corpus, as well as a few ulcer foci in the corpus, significant papilla loss, and bleeding. Meanwhile, in the ATP group, a similar appearance to healthy tissue was observed. Histopathologically, it was determined that in cisplatin-aggravated tongue tissue damage, filiform papillae decreased when ATP was administered, and the arrangement and structures of the epithelium, blood capillaries, muscle groups, and adipose cell groups were normal.</p><p><strong>Conclusions: </strong>Oral mucositis caused by cisplatin is alleviated by ATP. These findings may be useful for developing new therapeutic approaches to prevent or treat mucositis, a side effect so severe that can lead to treatment discontinuation.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20250007"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12002740/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143709853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between generalized joint hypermobility, temporomandibular joint hypertranslation and temporomandibular disorders: a scoping review.","authors":"Samilla Pontes Braga, Carolina Ortigosa Cunha, Ambrosina Michelotti, Leonardo Rigoldi Bonjardim, Paulo César Rodrigues Conti","doi":"10.1590/1678-7757-2024-0302","DOIUrl":"10.1590/1678-7757-2024-0302","url":null,"abstract":"<p><p>Generalized Joint Hypermobility (GJH) is one of the pathophysiological contributing factors for the development of temporomandibular disorders (TMD). There are, however, several counterpoints on the potential relation between TMD and joint hypermobility, especially when considering the temporomandibular joint (TMJ), event known as TMJ hypertranslation. Additionally, there is no consensus regarding the clinical and imaging diagnostic criteria for such condition. Hence, this scoping review addresses the association between GJH, TMJ hypertranslation and TMD, highlighting the lack of consensus concerning TMJ hypertranslation diagnosis. Eligibility criteria included book sections, clinical trials, meta-analyses, multicenter studies, observational studies, and reviews published in English between 1964 and 2024. Bibliographic search was conducted on the PubMed, SciELO, LILACS and Science Direct databases using the following Medical Subjective Headings (MeSH) terms: \"temporomandibular joint disorders,\" \"temporomandibular joint,\" \"joint instability\" and \"joint dislocations.\" \"TMJ hypermobility\" and \"TMJ subluxation,\" non-indexed terms, were applied as individual searches in the same databases. Manual search was performed in selected works by cross-referencing the included studies and book sections. Additional search was conducted in the grey literature. All searches were performed from January to June 2024. After selection, 54 texts were included. While some studies suggest that joint hypermobility (generalized or TMJ specific) may be a risk factor for TMD, especially of the intra-articular type, others rule out this association. No consensus on the potential association between joint hypermobility and TMD was achieved due to the diverse methodologies used to define TMJ hypertranslation diagnosis. More robust and controlled studies are needed to establish a diagnostic criteria and, consequently, understanding of its potential repercussions on masticatory structures, as well as management and prevention of the clinical manifestations.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240302"},"PeriodicalIF":2.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12005711/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143709852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of radiotherapy in chemical composition and mechanical properties of human cervical dentin: an in vitro study.","authors":"Renata Borges Rodrigues, Allyne Jorcelino Daloia de Carvalho, Bruna Vanessa Felipe E Silva, Paulo Cézar Simamoto-Júnior, Veridiana Resende Novais","doi":"10.1590/1678-7757-2024-0279","DOIUrl":"10.1590/1678-7757-2024-0279","url":null,"abstract":"<p><strong>Background: </strong>Ionizing radiation directly affects hard dental tissues, compromising the dental structure, which results in damage to dentin collagen fibers and impacts the integrity of the dentin-enamel junction (DEJ).</p><p><strong>Objective: </strong>To evaluate the effects of radiotherapy on the chemical composition and mechanical properties of human cervical dentin.</p><p><strong>Methodology: </strong>Ten third molars were divided into control/non-irradiated and irradiated groups (n=5). The irradiated teeth were subjected to in vitro radiotherapy with the following protocol: 1.8 Gy daily, five days per week for eight weeks, totaling 72 Gy. The dentin in the cervical region was evaluated for each group. The chemical composition was assessed using Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy, focusing on the mineral/matrix ratio (M:M), carbonate/mineral ratio (C:M), and amide I/amide III ratio. Amide I/CH2 ratio was used to assess collagen quality, as amide I reflects protein conformation and hydrogen bonding, while CH2 indicates side-chain vibrations with low sensitivity to molecular orientation. Nanohardness and elastic modulus were evaluated by instrumented indentation. Scanning electron microscopy (SEM) was used to assess the enamel's morphology. Statistical analysis of each parameter was performed using a t-test.</p><p><strong>Results: </strong>The FTIR analysis showed statistically significant differences in the C:M ratio (p=0.004) and amide I/amide III ratio (p=0.007). Raman spectroscopy revealed significant differences in the M:M ratio (p<0.001), as well as in the amide I/amide III (p<0.001) and amide I/CH2 ratios (p<0.001). Additionally, nanohardness (p=0.04) and the elastic modulus (p=0.003) showed statistically significant differences. SEM images revealed sound dentin shows normal tissue organization, whereas irradiated dentin showed no clear limit between peri and intertubular dentin.</p><p><strong>Conclusions: </strong>Radiotherapy induced significant changes in dentin composition and mechanical properties, characterized by increased organic content and phosphate levels, reduced carbonate, and decreased nanohardness and elastic modulus. These findings highlight the adverse effects on dentin's structural integrity.</p>","PeriodicalId":15133,"journal":{"name":"Journal of Applied Oral Science","volume":"33 ","pages":"e20240279"},"PeriodicalIF":2.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11978287/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}