BMC Oral Health最新文献

{"title":"Occlusal parameters and wear of artificial teeth in complete dentures with lingualized versus bilateral balanced occlusion: a randomized clinical trial.","authors":"Zhiqiang Wang, Yan Su, Jianmin Wang, Yang Liu, Wenzhong Xing","doi":"10.1186/s12903-024-05144-2","DOIUrl":"10.1186/s12903-024-05144-2","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to assess the occlusal contact area (OCA), occlusal contact number (OCN), bite force, and artificial tooth wear in complete dentures with lingualized and bilateral balanced occlusion.</p><p><strong>Methods: </strong>Edentulous participants who fulfilled the inclusion criteria were divided into the three groups as follows: group I, dentures with lingualized occlusion using interpenetrating polymer network artificial teeth; group II, dentures with lingualized occlusion using double cross-linked artificial teeth; and group III, dentures with bilateral balanced occlusion using anatomical micro-hybrid resin teeth. The silicone techniques were used to assess the OCA and OCN of the mandibular dentures and the Dental Prescale II was used to evaluate the bite force at the 2-week, 3-month, and 12-month follow-up visits. Occlusal contact analyzer software was used to assess the maxillary and mandibular posterior tooth wear at the 12-month follow-up visit. All data was analyzed using the SPSS software.</p><p><strong>Results: </strong>The OCA of group III was significantly higher than that of groups I and II at the 2-week follow-up visit, whereas group I was considerably higher than groups II and III at the 3-month and 12-month follow-up visits. The OCN of the three groups exhibited significant differences at all three follow-up visits. Groups I and II had significantly lower bite force than Group III at the three follow-up visits. At the 12-month follow-up visit, groups I and II had significantly higher wear than Group III.</p><p><strong>Conclusions: </strong>As the duration of use increases, the occlusal contact area of complete dentures increases, regardless of the occlusal schemes. The bite force of lingualized occlusion is typically lower than that of bilateral balanced occlusion. The wear locations of artificial teeth differ between the two types of occlusal schemes. (Retrospectively registered: The Chinese Clinical Trial Registry, No. ChiCTR2300073420(11/07/2023)).</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1405"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575096/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Periodontitis and dental quality of life predict long-term survival in head and neck cancer.","authors":"Mirna Farran, Evelyn Neppelberg, Sigbjørn Løes, Anne K H Aarstad, Svein Erik Moe, Hans Jørgen Aarstad","doi":"10.1186/s12903-024-05170-0","DOIUrl":"10.1186/s12903-024-05170-0","url":null,"abstract":"<p><strong>Background: </strong>Our aim was to investigate oral health in newly diagnosed head and neck squamous cell carcinoma (HNSCC) patients in relation to long-term survival. We assessed whether the level of alveolar bone loss due to periodontitis at diagnosis, measured from orthopantomogram (OPG), and reported dental health-related quality of life (HRQoL) scores obtained at diagnosis contain prognostic information for HNSCC patients.</p><p><strong>Methods: </strong>A total of 79 patients from a consecutive cohort of 106 diagnosed with HNSCC between November 2002 and June 2005 were included. All patients reported dental HRQoL, OPG-determined alveolar bone loss were measured in 79 patients at diagnosis. Reduced alveolar bone loss (≥ 4 mm) from cement-enamel junction on at least two molars or premolars registered both horizontally and vertically served as indicator of periodontal disease.</p><p><strong>Results: </strong>With alveolar bone loss, we determined increased mortality by univariate analysis (RR = 2.28, CI: 1.22-4.28, p = 0.01) and a strong trend by multivariate analyses adjusted for standard clinical information (RR = 1.95, CI: 0.98-3.87, p = 0.056). Reported lowered dental HRQoL scores predicted long-term survival in both univariate (RR = 3.58, CI: 1.99-6.45, p < 0.001) and multivariate adjusted for standard clinical information (RR = 2.17, CI: 1.17-4.01, p = 0.014). When analyzed with Cox regression, including alveolar bone loss and dental HRQoL, both factors, adjusted by clinical variables, were significant predictors of long-term survival: dental HRQoL (p = 0.007) and present alveolar bone loss (p = 0.034). Non-HNSCC disease-specific long-term survival predicted was also predicted when alveolar bone loss and dental HRQoL were analyzed simultaneously and adjusted for standard clinical information.</p><p><strong>Conclusions: </strong>The degree of alveolar bone loss, as determined by OPG, and dental HRQoL both obtained at the time of HNSCC diagnosis, predicted long-term survival. When analyzed simultaneously, both factors remained significant in both univariate and multivariate analyses, adjusted by pertinent clinical variables, highlighting their unique prognostic value.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1406"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575175/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dose-related effect of acetylcholine on human gingival blood flow.","authors":"Tamás László Nagy, Barbara Mikecs, Zsolt M Lohinai, János Vág","doi":"10.1186/s12903-024-05169-7","DOIUrl":"10.1186/s12903-024-05169-7","url":null,"abstract":"<p><strong>Background: </strong>This study investigates the dose-response relationship of acetylcholine (ACh) on healthy human gingival blood flow (GBF). Understanding this dose-response relationship contributes to studying vasodilatory mechanisms in various pathological conditions.</p><p><strong>Methods: </strong>The study involved 22 young healthy men (21 - 32 years) to investigate the dose-response relationship of ACh on GBF. Semi-circular wells were created on the labial surface of the upper right second incisor (FDI #12) and upper left first incisor (FDI #21), including the gingival sulcus, for the application of drugs. ACh-chloride solutions at 0.1, 1, and 10 mg/mL were administered to the gingival sulcus of tooth FDI #12 with a Hamilton syringe. Physiological saline was applied on the contralateral side to FDI #21 as a control. The GBF was measured non-invasively by the laser speckle contrast imaging method in four 1mm high adjacent regions: coronal, midway1, midway2, and apical, and was expressed in a laser speckle perfusion unit (LSPU). After the baseline blood flow recording, ACh doses were applied sequentially, with washout periods in between. Data were statistically analyzed using a linear mixed model.</p><p><strong>Results: </strong>The GBF did not change on the saline site throughout the experiment. The GBF was significantly higher at the coronal region after all ACh doses (baseline: 218±31 LSPU, and 227±38 LSPU p < 0.05, 239±40 LSPU p < 0.001, 291±54 LSPU p < 0.001, respectively) compared to the saline. It was also elevated following 1 and 10 mg/mL at the midway1 (245±48 LSPU, p < 0.05, 293±65 LSPU p < 0.001). At midway2 and apical, only the 10 mg/mL dose was effective (285±71 LSPU, p < 0.001; 302±82 LSPU, p < 0.001).</p><p><strong>Conclusions: </strong>Our findings suggest a dose-dependent vasodilation to ACh, emphasizing its role in human gingival microcirculation. Only the 10 mg/mL ACh could evoke remote vasodilation 3 mm from the application. The described method could facilitate the investigation of endothelium-dependent vasodilation in disorders affecting microcirculation, such as periodontitis or diabetes.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1398"},"PeriodicalIF":2.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571918/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduction of aerosol and droplet dispersions using intraoral and extraoral vacuums for dental treatments with face-up, diagonal and upright positions.","authors":"Tomonari Kajita, Kenji Kikuchi, Hiromitsu Morishima, Jun Watanabe, Yoko Iwamatsu-Kobayashi, Hiroyasu Kanetaka, Wataru Yashiro, Kensuke Yamauchi, Hiroshi Egusa","doi":"10.1186/s12903-024-04911-5","DOIUrl":"10.1186/s12903-024-04911-5","url":null,"abstract":"<p><strong>Purpose: </strong>The COVID-19 pandemic has affected lives and dental treatment. Aerosols and droplets generated during dental treatment present a risk of infection for dental care workers. However, detailed elucidation of the conditions under which those are generated has yet to be presented, and no clear countermeasures for protection have been established. The present study aimed to clarify the process of generation of aerosol and droplets in dental treatment, as well as their dynamics for establishment of effective countermeasures and protection strategies.</p><p><strong>Methods: </strong>Images were obtained using a high-speed camera of aerosol and droplets generated during dental treatments performed on a mannequin. The effects of intraoral vacuum and extraoral vacuum to reduce those, as well as splash range with different body position were examined. Quantitative evaluations of aerosol and droplets were also performed using water-sensitive paper.</p><p><strong>Results: </strong>Aerosol and droplets quantities were significantly reduced by use of both intraoral and extraoral vacuums as compared to no vacuum in both image analysis and findings obtained with water-sensitive paper (p < 0.05). Additionally, the intensity of aerosol and droplets when using the intraoral and extraoral vacuum devices with a body position of 45 degrees was a significantly less as compared to the other settings (p < 0.001).</p><p><strong>Conclusions: </strong>The present study demonstrated the effectiveness of visualization of the aerosol and droplets generated by dental tools using a high-speed camera. Use of an extraoral vacuum resulted in a reduction of those generated during simulated dental treatment, and also contributed to diffusion prevention to protect the operator and assistant. Nevertheless, it is necessary to be careful because the use of extraoral vacuums may reverse the spread of aerosol and droplets depending on the position of patient.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1397"},"PeriodicalIF":2.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571934/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142646332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of a 1.1% NaF toothpaste containing Sr/F-doped bioactive glass on irradiated demineralized dentin: an in vitro study.","authors":"Chananya Gesprasert, Matana Kettratad, Nattika Nimmano, Supapan Wittayanuwat, Narueporn Pischom, Parichart Naruphontjirakul, Piyaphong Panpisut","doi":"10.1186/s12903-024-05186-6","DOIUrl":"10.1186/s12903-024-05186-6","url":null,"abstract":"<p><strong>Objective: </strong>Patients receiving head and neck radiation are at high risk for radiation caries. This study aimed to evaluate the remineralizing effects of an experimental 1.1% NaF (5000 ppmF) toothpaste containing Sr/F-doped bioactive glass nanoparticles (BAG or B) on demineralized irradiated dentin.</p><p><strong>Materials and methods: </strong>Fluoride concentration and pH stability of materials upon mixing with water were assessed using a fluoride-specific electrode (n = 3) for up to 3 months. Elemental release of materials in water was determined using ICP-OES (n = 3). Fourteen extracted molars were irradiated with a cumulative dose of 70 Gy. Each tooth was sectioned into 4 specimens (n = 14/group), demineralized, and subjected to pH cycling for 14 days. Groups were treated with Prevident (PV), E5000, E5000B, and deionized water twice daily. Remineralization was assessed using ATR-FTIR (mineral-to-collagen ratio) (n = 14). Mineral precipitation was additionally examined with SEM-EDX. The in vitro cytotoxicity of the materials on L929 mouse fibrosarcoma was evaluated with the MTT test (n = 3). Kruskal-Wallis test, followed by Dunn's procedure, was used to compare the data between groups.</p><p><strong>Result: </strong>PV demonstrated greater pH and fluoride release stability than the experimental materials. E5000B exhibited a slight reduction of fluoride release (p < 0.01, R²=0.656) and an increase in pH with time (p = 0.006, R²=0.233). The highest increase in mineral-to-collagen ratio at 14 days was detected with PV (p < 0.05). E5000B also showed a significantly higher ratio than E5000 (p = 0.014). SEM-EDX detected mineral precipitation on dentin treated with PV and E5000B but not in E5000 and DI. The cell viability of PV (56%) was significantly lower than that of E5000 (94%) and E5000B (89%) (p < 0.05).</p><p><strong>Conclusion: </strong>The use of 5000 ppm fluoride toothpaste enhanced the remineralization of irradiated demineralized dentin, highlighting a potentially valuable strategy for preventing radiation caries. Adding bioactive glass further promoted remineralization but may require formulation adjustments to maintain toothpaste stability for clinical use.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1399"},"PeriodicalIF":2.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142646247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An investigation of the validity of the Bedek models and Cameriere-European formula used in dental age prediction in Turkish children.","authors":"Zekiye Şeyma Gümüşboğa, Gülsüm Duruk, Ecem Özdemir, Tuba Aydan, Ayşe Şuara Kırgın","doi":"10.1186/s12903-024-05166-w","DOIUrl":"10.1186/s12903-024-05166-w","url":null,"abstract":"<p><strong>Background: </strong>Dental age estimation is one of the most reliable methods for determining age, commonly used for forensic, criminal, and anthropological purposes. The purpose of this study was to assess and compare the precision of the Bedek models and the Cameriere-European Formula (CF) in determinating dental age in a sample of Turkish individuals.</p><p><strong>Methods: </strong>Retrospective panoramic radiographs of 1018 subjects (497 boys and 521 girls) aged 5-14 years were evaluated using the Bedek models and the CF. The differences between calculated dental age (DA) and chronological age (CA) for each sex and age group were analyzed using the paired sample t-test and the Wilcoxon signed-rank test. The accuracy of the methods used to estimate dental age was determined by calculating the mean absolute error (MAE) based on the proximity of the dental age to the chronological age.</p><p><strong>Results: </strong>The CF method overestimated CA by 0.1 year in the entire sample. Conversely, the Bedek models tended to overestimate CA, with the three-, four-, and seven-tooth models exhibiting the most significant difference. There was a statistically significant difference between boys and girls in the DA-CA calculation using the CF method in the entire sample. Among the Bedek models, the three- and four-tooth models had the lowest MAE in the entire sample, while the single-tooth model had the highest MAE.</p><p><strong>Conclusion: </strong>The CF method showed higher accuracy in predicting the age of children living in eastern Turkey compared to the Bedek Models.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1396"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11569600/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A CBCT study of changes in temporomandibular joint morphology with immediate implant placement and immediate loaded full-arch fixed dental prostheses.","authors":"Rundong Zhang, Ziyu Ge, Xinrui Lang, Bo Qiao, Jiayi Chen, Baoding Ye, Yanzhen Zhang","doi":"10.1186/s12903-024-05187-5","DOIUrl":"10.1186/s12903-024-05187-5","url":null,"abstract":"<p><strong>Background: </strong>Dental implants are becoming a popular treatment of choice. Immediate implant placement with immediate loaded full-arch fixed dental prostheses (IPILFFDP) presents an attractive solution for edentulous and partially edentulous patients because of its high success rate, reduction in overall treatment time, and improved esthetics. However, whether it can minimize the risk of temporomandibular disorder (TMD) has not been previously studied.</p><p><strong>Objective: </strong>To quantitatively evaluate the temporomandibular joint (TMJ) morphology changes before and after IPILFFDP, using cone beam computed tomography (CBCT).</p><p><strong>Methods: </strong>Twelve participants without TMJ symptoms undergoing IPILFFDP were included in the study. Preoperative and 1-year postoperative assessment of CBCT scans were performed on 18 items related to TMJ and vertical dimensions. Mimics software was used for data analysis. T-test, Pearson, and Spearman correlation analyses were performed.</p><p><strong>Results: </strong>There were no significant differences in bilateral joints between pre and post IPILFFDP. Compared with pre-treatment CBCT, post-treatment CBCT showed a significant increase in posterior joint space. There was an approximately 2 mm increase in the vertical dimension after IPILFFDP, which is correlated with an increase in the medial joint space.</p><p><strong>Conclusions: </strong>For patients without TMJ-related signs and symptoms, the IPILFFDP could keep the neuromuscular memory of patient's facial muscles and occlusion, and use adapted centric posture as a guide, which led to more precise restoration of the original jaw position and may shed light in future related clinical studies.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1392"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11569609/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The optional apex sites for quad zygomatic implant placement in edentulous patients with severe alveolar bone resorption: a CBCT anatomical analysis.","authors":"Jiayi Wang, Bo Chen, Yuexin Zhao, Shaoxia Pan, Xiangliang Xu","doi":"10.1186/s12903-024-05140-6","DOIUrl":"10.1186/s12903-024-05140-6","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the difference in bone-implant contact (BIC) and the rate of infratemporal fossa intrusion among different apex sites for quad zygomatic implants (ZIs) design in edentulous patients with severe alveolar bone resorption.</p><p><strong>Methods: </strong>Patients with maxillary edentulism were evaluated. Alveolar bone resorption was assessed using the Cawood and Howell classification. Participants with Class IV or Class V/VI bone resorption were selected. The zygomatic bone was devided into upper, middle and lower thirds, with four potential implant apex locations identified in each third. Virtual planning for quad ZIs, along with measurements of BIC were performed. Additionally, the occurrence of ZIs intrusion into the infratemporal fossa was examined, and the distance between ZI and orbital cavity was measured.</p><p><strong>Results: </strong>A total of 28 CBCT scans of edentulous patients, encompassing 56 zygomas, were analyzed. Thirty-nine single lateral posterior edentulous jaws were classified into Class IV subgroup, while 17 into Class V/IV subgroup. Among all patients and patients in subgroups, the anterior and posterior ZI exhibited the highest BIC at points A3 and B2, respectively. The average zygomatic BIC at A3 apex point was 18.3 ± 3.9 mm, and that at the B2 apex point was 16.3 ± 5.3 mm. Quad ZIs risk intrusion into the infratemporal fossa when positioned at B2, B3, and at all apex points of the lower zygoma segment. Three anterior ZIs at A3 point show less than 1 mm distance to orbital cavity. Overall, A3 and B1 apex points showed high BIC and low infratemporal intrusion rate for quad ZIs, irrespective of patient's alveolar bone resorption status.</p><p><strong>Conclusions: </strong>The optional apex point for anterior and posterior quad ZIs is A3 and B1, respectively, regardless of the patients's alveolar bone resorption level. Alveolar bone resorption does not affect the BIC for quad ZIs. Anterior ZI positioned at A3 point may present high risk for orbital penetration and may not be reccomended in a Quad ZI approach.</p><p><strong>Trial registration: </strong>The clinical research is registered under the number ChiCTR2100044472.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1393"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11569599/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The interplay between toothbrush stiffness and charcoal-containing dentifrice on the development of enamel topography changes.","authors":"Abdulrahman A Balhaddad, Fatimah Almalki, Raand Altayyar, Riham Alzahrani, Shahad Alotaibi, Laila Al Dehailan, Maria Salem Ibrahim","doi":"10.1186/s12903-024-05183-9","DOIUrl":"10.1186/s12903-024-05183-9","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to investigate the in vitro effect of a charcoal-containing dentifrice with different toothbrush stiffness on enamel.</p><p><strong>Methods: </strong>Four main groups were applied: distilled water, conventional fluoridated toothpaste (Colgate^® Total^® 12 Clean Mint Toothpaste), charcoal toothpaste (Colgate^® Total^® Charcoal Toothpaste) and whitening toothpaste (Colgate Total^® Advanced Whitening Toothpaste). Three subgroups for each toothpaste were further included according to the toothbrush bristles' stiffness (soft, medium, and hard). Enamel specimens were subjected to 1,250 and 2,500 cycles of brushing using toothbrushing simulation machine. The average surface roughness change (ΔRa) in nanometer (nm) was measured to estimate the changes following the brushing simulation model. Two-way ANOVA and Tukey tests analyzed the data.</p><p><strong>Results: </strong>The type of toothpaste and the bristles' stiffness were determinant factors in increasing the ΔRa value (P = < 0.05). Generally, charcoal and whitening toothpastes with medium and hard bristles yielded higher ΔRa than fluoridated toothpaste and smooth bristles. Following 1,250 cycles of brushing simulation, charcoal toothpaste did not increase the enamel roughness compared to the controls. However, in prolonged brushing via 2,500 cycles of brushing simulation, using bristles with soft stiffness revealed that charcoal toothpaste was associated with increased surface roughness (55.86 ± 41.18 nm), which was statistically significant (P = 0.024) compared to the negative control. Using bristles with medium stiffness showed that the whitening (68.23 ± 48.58 nm) and charcoal (73.62 ± 34.66 nm) toothpastes significantly (P = < 0.05) increased the enamel roughness compared to the conventional toothpaste (36.53 ± 22.56 nm). There was no significant difference among the groups when brushes with hard bristles were used, as all the groups revealed increased enamel roughness.</p><p><strong>Conclusion: </strong>The use of charcoal and whitening toothpastes increased enamel roughness, particularly with long-term use. The effect of bristle stiffness on enamel roughness was found to vary depending on the type of toothpaste used.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1394"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11569616/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dentinal tubule occlusion effects of dipotassium oxalate and diode laser combination: a single-blind in vitro study.","authors":"Ömer Birkan Ağralı, Eser Elemek, Canan Güler Kılıç, Semra Ünal, Çiğdem Doğan, Hatice Selin Güngörmek, Hare Gürsoy, Leyla Kuru","doi":"10.1186/s12903-024-05207-4","DOIUrl":"10.1186/s12903-024-05207-4","url":null,"abstract":"<p><strong>Background: </strong>Dentin hypersensitivity (DH) affects many patients. Various therapeutic options have been devised to alleviate this condition by achieving dentinal tubules (DT) occlusion. This research aimed to investigate the effects of dipotassium oxalate-containing mouthwash, diode laser and their combination on DT occlusion.</p><p><strong>Methods: </strong>Forty dentin samples were obtained from 20 human single-rooted third molars, 40 dentin specimens were obtained, and exposed DT were created in vitro. They were assigned into four groups: Group 1 (n = 10), the control group where no treatment was applied; Group 2 (n = 10), a mouthwash with a 1.4% dipotassium oxalate was applied twice for 60 s during a 5-day period in a shaker at 100 rpm; Group 3 (n = 10), a combination of the same mouthwash and an 810 nm diode laser at an output power of 0.25 W in continuous mode was applied for 60 s without contact at a distance of 3-4 mm; and Group 4 (n = 10), only a diode laser with the same protocol was applied. Occlusion of the DT was observed by scanning electron microscopy.</p><p><strong>Results: </strong>The analysis revealed occlusion of the DT in all treatment groups; however, the effects were more pronounced in the combined treatment group (Group 3). Compared with the test groups, the control group had significantly more open DT in 100 µm² (p < 0.01). The difference between the Group 2 and Group 4 was not significant (p > 0.05).</p><p><strong>Conclusion: </strong>DT occlusion was achieved via the use of a mouthwash containing 1.4% dipotassium oxalate and an 810 nm diode laser. However, the combination resulted in the greatest results and therefore may be utilized in individuals with DH.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"24 1","pages":"1395"},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11569597/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}