Pub Date : 2024-07-26DOI: 10.3389/fdmed.2024.1391833
L. M. López del Valle, Mariely Nieves-Plaza, Sona Rivas-Tumanyan, Rosana Hanke-Herrero
Obesity and caries have become increasingly prevalent. As yet, research results on the relationship between obesity and caries in children and adolescents have been inconclusive. This study aimed to evaluate the association between caries and obesity in adolescents.This was a cross-sectional study of a convenience sample of 187 Puerto Rican adolescents aged 13–19 years, attending, among them, five high schools. Each participant received dental exams for caries using the criteria of the International Caries Detection and Assessment System (ICDAS), had his or her body mass index (BMI) determined, and took a 19-item risk-factor questionnaire. The Significant Caries (SiC) index (for DMFT) was calculated to compare obese and healthy adolescents. Statistical analysis was performed using descriptive and inferential statistics.Nearly 60% of the sample population was female, with a mean age of 15.7 (±1.25). The mean BMI percentile was 72.24 (±28.78); 48.66% of the participants had a healthy weight, 19.79% were overweight, and 30.48% were obese. Dental caries was observed in 68% of the participants; the mean caries indexes D3-6MFS was 5.17(±5.92) and mean D3-6MFT 3.59 (±3.97). No significant differences were found between caries indexes and obesity status (P > 0.05). The Median (p25, p75) SiC index among overweight/obese adolescents was 9.5 (7, 12), whereas for healthy weight/underweight participants was 7 (5, 8) (p < 0.005).Based on the limited number of participants, no association was found between dental caries (D3-6MFS and D3-6MFT) and obesity (BMI) among adolescents.
{"title":"Relationship between caries indexes and obesity in a sample of Puerto Rican adolescents","authors":"L. M. López del Valle, Mariely Nieves-Plaza, Sona Rivas-Tumanyan, Rosana Hanke-Herrero","doi":"10.3389/fdmed.2024.1391833","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1391833","url":null,"abstract":"Obesity and caries have become increasingly prevalent. As yet, research results on the relationship between obesity and caries in children and adolescents have been inconclusive. This study aimed to evaluate the association between caries and obesity in adolescents.This was a cross-sectional study of a convenience sample of 187 Puerto Rican adolescents aged 13–19 years, attending, among them, five high schools. Each participant received dental exams for caries using the criteria of the International Caries Detection and Assessment System (ICDAS), had his or her body mass index (BMI) determined, and took a 19-item risk-factor questionnaire. The Significant Caries (SiC) index (for DMFT) was calculated to compare obese and healthy adolescents. Statistical analysis was performed using descriptive and inferential statistics.Nearly 60% of the sample population was female, with a mean age of 15.7 (±1.25). The mean BMI percentile was 72.24 (±28.78); 48.66% of the participants had a healthy weight, 19.79% were overweight, and 30.48% were obese. Dental caries was observed in 68% of the participants; the mean caries indexes D3-6MFS was 5.17(±5.92) and mean D3-6MFT 3.59 (±3.97). No significant differences were found between caries indexes and obesity status (P > 0.05). The Median (p25, p75) SiC index among overweight/obese adolescents was 9.5 (7, 12), whereas for healthy weight/underweight participants was 7 (5, 8) (p < 0.005).Based on the limited number of participants, no association was found between dental caries (D3-6MFS and D3-6MFT) and obesity (BMI) among adolescents.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"47 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141798984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.3389/fdmed.2024.1423401
L. M. Golub, Hsi-Ming Lee, Joseph Bacigalupo, Ying Gu
{"title":"Host modulation therapy in periodontitis, diagnosis and treatment—status update","authors":"L. M. Golub, Hsi-Ming Lee, Joseph Bacigalupo, Ying Gu","doi":"10.3389/fdmed.2024.1423401","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1423401","url":null,"abstract":"","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"7 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141642783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-11DOI: 10.3389/fdmed.2024.1430828
Martha J. Somerman, W. Mouradian, S. Ganesan
This perspective provides strong evidence that the aims set forth when Frontiers in Dental Medicine (FDMED) was launched in 2020, to advance the integration of dental, oral, and craniofacial research with mainstream biomedical practice, underscored the value of interprofessional research collaborations, encouraging studies, publications, and commentaries in this area ripe for continued innovation. The momentum gained toward these aims must continue to inform the public, health care providers, researchers, educators, and policy makers so that they can apply the knowledge gained to improve the overall health needs of all our communities.
{"title":"2020 Grand challenge revisited: removing silos, advancing research to improve overall health","authors":"Martha J. Somerman, W. Mouradian, S. Ganesan","doi":"10.3389/fdmed.2024.1430828","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1430828","url":null,"abstract":"This perspective provides strong evidence that the aims set forth when Frontiers in Dental Medicine (FDMED) was launched in 2020, to advance the integration of dental, oral, and craniofacial research with mainstream biomedical practice, underscored the value of interprofessional research collaborations, encouraging studies, publications, and commentaries in this area ripe for continued innovation. The momentum gained toward these aims must continue to inform the public, health care providers, researchers, educators, and policy makers so that they can apply the knowledge gained to improve the overall health needs of all our communities.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-10DOI: 10.3389/fdmed.2024.1452938
John W. Kusiak, Richard Ohrbach, Alexandre Da Silva, Mildred Embree
{"title":"Editorial: Temporomandibular disorder: new directions in research and patient care","authors":"John W. Kusiak, Richard Ohrbach, Alexandre Da Silva, Mildred Embree","doi":"10.3389/fdmed.2024.1452938","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1452938","url":null,"abstract":"","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"33 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-02DOI: 10.3389/fdmed.2024.1372312
Cristian Docampo-Vázquez, Teresa Gragera-Alia, Manuel Fernández-Domínguez, Álvaro Zubizarreta-Macho, Juan Manuel Aragoneses-Lamas
The objective of the present study was to analyze and describe a new digital technique for analyzing the volumetric healing process of free gingival grafts in both donor and recipient locations surrounding a dental implant, as well as to compare the reliability of conventional and digital techniques for measuring the width of the free gingival graft in the recipient location throughout the healing process.Ten patients presenting with mucositis linked to a dental implant were included. A preoperative soft tissue width <2 mm, with probing pocket depth <5 mm, edema and inflammation and bleeding on probing was determined A digital impression was taken of both donor and recipient locations using an intraoral scan, generating a Standard Tessellation Language digital file both preoperatively (STL1) and after 1 week (STL2), 1 month (STL3), 3 months (STL4), and 6 months (STL5) of follow-up. Afterwards, the digital files (STL1-STL5) were aligned using a reverse engineering morphometric software, and Student's t-test was used to analyze changes in volume at the donor and recipient locations. Additionally, widths were measured both clinically and digitally so as to compare the reliability of these measurement techniques. The repeatability and reproducibility of both these measurement techniques were also analyzed using Gage R&R statistical analysis.Gage R&R found that total variability of the digital technique was 0.6% (among the measures of each operator) and 7.6% (among operators); as variability was under 10%, the results were repeatable and reproducible. In addition, there were statistically significant differences between donor and recipient locations in healing process volume (mm3) after one week (p = 0.0110), one month (p = 0.0007), three months (p < 0.0001) and six months (p = 0.0004) of follow-up.The digital measurement technique provided accurate, repeatable, and reproducible results when analyzing the volumetric and lineal measures of the healing process in both the donor and recipient locations of a free gingival graft surrounding a dental implant, with significantly higher tissue volume in the recipient location.
{"title":"Novel digital technique for measuring the volumetric healing process of free gingival grafts surrounding dental implants","authors":"Cristian Docampo-Vázquez, Teresa Gragera-Alia, Manuel Fernández-Domínguez, Álvaro Zubizarreta-Macho, Juan Manuel Aragoneses-Lamas","doi":"10.3389/fdmed.2024.1372312","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1372312","url":null,"abstract":"The objective of the present study was to analyze and describe a new digital technique for analyzing the volumetric healing process of free gingival grafts in both donor and recipient locations surrounding a dental implant, as well as to compare the reliability of conventional and digital techniques for measuring the width of the free gingival graft in the recipient location throughout the healing process.Ten patients presenting with mucositis linked to a dental implant were included. A preoperative soft tissue width <2 mm, with probing pocket depth <5 mm, edema and inflammation and bleeding on probing was determined A digital impression was taken of both donor and recipient locations using an intraoral scan, generating a Standard Tessellation Language digital file both preoperatively (STL1) and after 1 week (STL2), 1 month (STL3), 3 months (STL4), and 6 months (STL5) of follow-up. Afterwards, the digital files (STL1-STL5) were aligned using a reverse engineering morphometric software, and Student's t-test was used to analyze changes in volume at the donor and recipient locations. Additionally, widths were measured both clinically and digitally so as to compare the reliability of these measurement techniques. The repeatability and reproducibility of both these measurement techniques were also analyzed using Gage R&R statistical analysis.Gage R&R found that total variability of the digital technique was 0.6% (among the measures of each operator) and 7.6% (among operators); as variability was under 10%, the results were repeatable and reproducible. In addition, there were statistically significant differences between donor and recipient locations in healing process volume (mm3) after one week (p = 0.0110), one month (p = 0.0007), three months (p < 0.0001) and six months (p = 0.0004) of follow-up.The digital measurement technique provided accurate, repeatable, and reproducible results when analyzing the volumetric and lineal measures of the healing process in both the donor and recipient locations of a free gingival graft surrounding a dental implant, with significantly higher tissue volume in the recipient location.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"349 17‐18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141686768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.3389/fdmed.2024.1415960
Vitor C. M. Neves, Viktor Savchenko, James Daly, Paul Sharpe
Periodontal disease (PD), a widespread non-communicable disease, affects over 90% of the global population with no known cure. Current management strategies focus on stabilization of disease progression, which is successfully achieved to a limited extent. Yet the never-ending battle of bacteria and the gingiva involves a complex interplay between genetic, microbial and environmental factors, demanding innovative approaches to improve prevention and stabilisation of this disease. Glucose is the body's source of energy and research has shown that dysregulation of the glucose metabolism impacts PD establishment and progression, as well as impact development of systemic non communicable diseases. Metformin, a drug known for its efficacy in diabetes treatment via controlling glucose metabolism, also demonstrated cardioprotective effects, increased longevity, and anti-inflammatory properties. Metformin has been used in gel format in clinical trials for PD non-surgical treatment, however, its systemic use in normoglycemic individuals with PD is less explored. A recent study presented compelling evidence of Metformin's preventive potential, impacting PD and markers of systemic health involved in metabolic health liked to improvement of lifespan. Therefore, this review discusses the aspects of ageing as a concept in the periodontium and the potential benefits of modulating glucose metabolism through Metformin to prevent PD, indirectly preventing systemic conditions involved in multi-morbidity, addressing a critical gap in current management. It also examines the choice between implementation of behaviour change and/or medication as strategy to add to current oral hygiene strategies. Finally, it discusses the ethical implications of prescribing systemic medication in dentistry.
{"title":"Periodontal ageing and its management via pharmacological glucose modulation","authors":"Vitor C. M. Neves, Viktor Savchenko, James Daly, Paul Sharpe","doi":"10.3389/fdmed.2024.1415960","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1415960","url":null,"abstract":"Periodontal disease (PD), a widespread non-communicable disease, affects over 90% of the global population with no known cure. Current management strategies focus on stabilization of disease progression, which is successfully achieved to a limited extent. Yet the never-ending battle of bacteria and the gingiva involves a complex interplay between genetic, microbial and environmental factors, demanding innovative approaches to improve prevention and stabilisation of this disease. Glucose is the body's source of energy and research has shown that dysregulation of the glucose metabolism impacts PD establishment and progression, as well as impact development of systemic non communicable diseases. Metformin, a drug known for its efficacy in diabetes treatment via controlling glucose metabolism, also demonstrated cardioprotective effects, increased longevity, and anti-inflammatory properties. Metformin has been used in gel format in clinical trials for PD non-surgical treatment, however, its systemic use in normoglycemic individuals with PD is less explored. A recent study presented compelling evidence of Metformin's preventive potential, impacting PD and markers of systemic health involved in metabolic health liked to improvement of lifespan. Therefore, this review discusses the aspects of ageing as a concept in the periodontium and the potential benefits of modulating glucose metabolism through Metformin to prevent PD, indirectly preventing systemic conditions involved in multi-morbidity, addressing a critical gap in current management. It also examines the choice between implementation of behaviour change and/or medication as strategy to add to current oral hygiene strategies. Finally, it discusses the ethical implications of prescribing systemic medication in dentistry.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"9 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-14DOI: 10.3389/fdmed.2024.1373922
A. J. Cresswell-Boyes, Graham Roy Davis, Aylin Baysan
This study aimed to investigate students' perceptions of the use of 3D-printed typodonts by implementing a questionnaire and evaluating the students' comparisons between extracted, commercial and 3D-printed teeth.Ethical approval was obtained (QMER20.586/2021) and questionnaire feedback was collected anonymously using an online survey. A total of 143 fourth- and fifth-year dental students were approached to participate during pre-clinical courses focussing on root canal therapy. The tooth design was based on micro-CT data of an extracted maxillary central incisor and 3D-printed with haptically-similar materials produced in previous work. The questionnaire comprised 11 Likert-scale questions, four open-ended questions, two “yes” or “no” questions and three closed-ended questions.Eighty questionnaires were returned. Overall, the feedback was favourable towards the 3D-printed typodonts compared to the commercial teeth. The biggest difference in responses was in Question 6 related to the realism of drilling the enamel when comparing 3D-printed teeth with commercial ones. Statistical analysis showed a significant difference (p < 0.05); the fourth-year's response on average, was 2.95 (±0.73) an “agree” rating, whereas the fifth-year's response was 3.98 (±0.82) with “neither agree or disagree”.Within the limitations of this study, the 3D-printed typodonts were rated high in comparison to the commercial teeth in terms of overall operative experiences.
本研究旨在通过实施问卷调查和评估学生对拔牙、商业牙和 3D 打印牙的比较，调查学生对使用 3D 打印牙的看法。研究获得了伦理批准（QMER20.586/2021），并通过在线调查匿名收集问卷反馈。在以根管治疗为重点的临床前课程中，共接触了 143 名四年级和五年级的牙科学生。牙齿设计基于拔出的上颌中切牙的显微 CT 数据，并使用以前工作中生产的触觉类似材料进行 3D 打印。问卷包括 11 个李克特量表问题、4 个开放式问题、2 个 "是 "或 "否 "问题和 3 个封闭式问题。总体而言，与商业牙齿相比，3D 打印的排牙得到了好评。回答中最大的差异出现在第 6 个问题上，即在比较 3D 打印牙和商用牙时，钻珐琅质的逼真度。统计分析表明差异很大（p < 0.05）；四年级学生的平均回答为 2.95（±0.73）分，"同意 "分，而五年级学生的回答为 3.98（±0.82）分，"既不同意也不不反对"。
{"title":"Students’ perceptions of endodontic typodont teeth with simulated canals printed from novel materials","authors":"A. J. Cresswell-Boyes, Graham Roy Davis, Aylin Baysan","doi":"10.3389/fdmed.2024.1373922","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1373922","url":null,"abstract":"This study aimed to investigate students' perceptions of the use of 3D-printed typodonts by implementing a questionnaire and evaluating the students' comparisons between extracted, commercial and 3D-printed teeth.Ethical approval was obtained (QMER20.586/2021) and questionnaire feedback was collected anonymously using an online survey. A total of 143 fourth- and fifth-year dental students were approached to participate during pre-clinical courses focussing on root canal therapy. The tooth design was based on micro-CT data of an extracted maxillary central incisor and 3D-printed with haptically-similar materials produced in previous work. The questionnaire comprised 11 Likert-scale questions, four open-ended questions, two “yes” or “no” questions and three closed-ended questions.Eighty questionnaires were returned. Overall, the feedback was favourable towards the 3D-printed typodonts compared to the commercial teeth. The biggest difference in responses was in Question 6 related to the realism of drilling the enamel when comparing 3D-printed teeth with commercial ones. Statistical analysis showed a significant difference (p < 0.05); the fourth-year's response on average, was 2.95 (±0.73) an “agree” rating, whereas the fifth-year's response was 3.98 (±0.82) with “neither agree or disagree”.Within the limitations of this study, the 3D-printed typodonts were rated high in comparison to the commercial teeth in terms of overall operative experiences.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"47 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-12DOI: 10.3389/fdmed.2024.1429305
Mario Taba, Melissa M. Grant
{"title":"Editorial: Salivary biomarkers for oral and systemic diseases","authors":"Mario Taba, Melissa M. Grant","doi":"10.3389/fdmed.2024.1429305","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1429305","url":null,"abstract":"","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"27 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141354703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-06DOI: 10.3389/fdmed.2024.1409150
Camille Haddad, Jean Gebran, Amine El Zoghbi
Evaluating the fracture resistance of dental ceramics such as monolithic zirconia crowns is crucial for assessing their durability. Conventional destructive laboratory tests often fail to accurately evaluate the timing and failing crack formation of these brittle materials. Non-destructive testing methods, such as acoustic emission testing (AET), offers an alternative by providing valuable data on material properties without causing damage to the samples.The in vitro study aimed to evaluate the sensitivity of a sound harvesting modified acoustic emission testing by comparing the fracture resistance of posterior monolithic zirconia crowns (MZCs) measured via the modified set up with that of a conventional fracture toughness test.A modified acoustic emission set up, the sound harvesting test (SHT), featuring a condenser microphone, an amplifier, a custom audio chipset and a cut-off switch integrated into a universal testing machine, was compared to a conventional fracture toughness test to measure fracture loads on 50 posterior monolithic zirconia crowns divided in two groups.The sound harvesting test recorded a mean fracture load of 1,108.99 N, significantly less than the 1,292.52 N measured with the conventional test, indicating a more sensitive detection of fractures. Statistically significant differences (p < 0.05) were observed between the two groups.Despite its limitations, the study suggests considering sound harvesting testing as an potential alternative for fracture load testing of dental brittle materials due to its ability to identify failures at lower loads enhancing therefore a more accurate evaluation of the behavior of dental materials. However, further testing on a broader range of dental materials is warranted to improve result accuracy and applicability.
{"title":"Application of non-destructive testing methods for assessing fracture resistance in dental ceramics: the sound harvesting test","authors":"Camille Haddad, Jean Gebran, Amine El Zoghbi","doi":"10.3389/fdmed.2024.1409150","DOIUrl":"https://doi.org/10.3389/fdmed.2024.1409150","url":null,"abstract":"Evaluating the fracture resistance of dental ceramics such as monolithic zirconia crowns is crucial for assessing their durability. Conventional destructive laboratory tests often fail to accurately evaluate the timing and failing crack formation of these brittle materials. Non-destructive testing methods, such as acoustic emission testing (AET), offers an alternative by providing valuable data on material properties without causing damage to the samples.The in vitro study aimed to evaluate the sensitivity of a sound harvesting modified acoustic emission testing by comparing the fracture resistance of posterior monolithic zirconia crowns (MZCs) measured via the modified set up with that of a conventional fracture toughness test.A modified acoustic emission set up, the sound harvesting test (SHT), featuring a condenser microphone, an amplifier, a custom audio chipset and a cut-off switch integrated into a universal testing machine, was compared to a conventional fracture toughness test to measure fracture loads on 50 posterior monolithic zirconia crowns divided in two groups.The sound harvesting test recorded a mean fracture load of 1,108.99 N, significantly less than the 1,292.52 N measured with the conventional test, indicating a more sensitive detection of fractures. Statistically significant differences (p < 0.05) were observed between the two groups.Despite its limitations, the study suggests considering sound harvesting testing as an potential alternative for fracture load testing of dental brittle materials due to its ability to identify failures at lower loads enhancing therefore a more accurate evaluation of the behavior of dental materials. However, further testing on a broader range of dental materials is warranted to improve result accuracy and applicability.","PeriodicalId":502488,"journal":{"name":"Frontiers in Dental Medicine","volume":"150 9‐12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141381155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-22DOI: 10.3389/fdmed.2024.1408839
Shumani Charlotte Manenzhe, Sandra Koutras, N. Zwane, Aubrey Isaac Masilana, S. Shangase
The extensive studies on Filifactor alocis (Fa) show a positive association with periodontitis, demonstrating elevated Fa levels compared to traditional periodontal pathogens in severe disease. Periodontitis is a chronic multifactorial disease induced by a dysbiotic microbiota in a susceptible host whilst diabetes is an established risk factor for periodontitis. Diabetes has been shown to alter the subgingival microbiota into distinct microbial communities which favours the shift towards disease. It is these very distinct subgingival microbiota that are believed to contribute to the high prevalence and severity of periodontitis in diabetic patients. This dysbiotic microbiota constitute traditional periodontal pathogens which include among others the red complex triad (Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia), Aggregatibacter actinomycetemcomitans, the orange complex (Fusobacterium nucleatum, Prevotella intermedia etc.) and other emerging pathogens such as Fa that were previously unrecognised as role players in the pathogenesis of periodontitis. Fa is an asaccharolytic anaerobic gram-positive rod (AAGPR) currently considered to be one of the potential drivers of periodontitis progression and worsening through its unique virulence characteristics. Various mechanisms through which Fa contributes to the pathogenesis and severity of periodontitis have been reported. The mechanisms involved in the bidirectional relationship between periodontitis and diabetes are continuously being explored in order to enhance individualised preventative and management approaches in affected patients. This review aims to report on this emerging periodontal pathogen and its capacity to influence dysbiosis within a complex subgingival microbial community; including its potential role in the bidirectional relationship between diabetes and periodontitis. This review will highlight Fa as a potential prognostic indicator for disease worsening, which will help improve management protocols for periodontitis and diabetes.
有关 Filifactor alocis（Fa）的大量研究表明，Fa 与牙周炎有积极的联系，与传统的牙周病病原体相比，Fa 在严重疾病中的含量更高。牙周炎是一种慢性多因素疾病，由易感宿主体内微生物群失调诱发，而糖尿病是牙周炎的既定风险因素。研究表明，糖尿病会改变龈下微生物群，使其形成不同的微生物群落，从而有利于疾病的发生。据信，正是这些截然不同的龈下微生物群导致了糖尿病患者牙周炎的高发病率和严重程度。这种菌群失调的微生物群构成了传统的牙周病病原体，其中包括红色复合三联菌（牙龈卟啉单胞菌、牙龈特雷波氏菌、连翘泰纳菌）、放线菌属（Aggregatibacter actinomycetemcomitans）、橙色复合菌（核分枝杆菌、中间前驱菌等）以及其他新出现的病原体，如以前未被认识到在牙周炎发病机制中起作用的 Fa。Fa是一种溶糖性厌氧革兰阳性杆菌（AAGPR），由于其独特的毒力特征，目前被认为是牙周炎进展和恶化的潜在驱动因素之一。据报道，Fa 对牙周炎的发病机制和严重程度有多种影响。人们正在不断探索牙周炎与糖尿病之间双向关系的相关机制，以加强对受影响患者的个性化预防和管理方法。本综述旨在报告这种新出现的牙周病原体及其在复杂的龈下微生物群落中影响菌群失调的能力，包括其在糖尿病和牙周炎之间双向关系中的潜在作用。本综述将强调 Fa 是疾病恶化的潜在预后指标，这将有助于改善牙周炎和糖尿病的管理方案。
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