Journal of oral science最新文献_第2页

A novel air-polishing powder from natural eggshell. 从天然蛋壳中提取的新型空气抛光粉。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-16 Epub Date: 2024-10-31 DOI: 10.2334/josnusd.24-0222

Visaluk Punyawattananon, Wisarut Prawatvatchara, Niyom Thamrongananskul, Krisana Siralertmukul, Awiruth Klaisiri, Cheewin Towithelertkul

{"title":"A novel air-polishing powder from natural eggshell.","authors":"Visaluk Punyawattananon, Wisarut Prawatvatchara, Niyom Thamrongananskul, Krisana Siralertmukul, Awiruth Klaisiri, Cheewin Towithelertkul","doi":"10.2334/josnusd.24-0222","DOIUrl":"10.2334/josnusd.24-0222","url":null,"abstract":"Purpose: This study compares the ability of extrinsic stain removal and surface roughness changes on tooth surfaces after using two different types of dental air polishing powder: Sodium bicarbonate and novel eggshell powder.Methods: For the study of extrinsic stain removal, twenty bovine teeth were soaked in coffee for extrinsic stain formation. Group 1 and Group 2 were polished with sodium bicarbonate powder and novel eggshell powder, respectively. The acquired stains of teeth were recorded as baseline, and color changes after cleaning with two different powders were also measured by colorimeter. Sixteen samples from eight human posterior teeth were used for the surface roughness test. Surface roughness values (Sa) of two groups (sodium bicarbonate and novel eggshell powder) were measured by a contact-type profilometer before and after polishing with two types of powders.Results: The data showed that the average ΔE* value of the sodium bicarbonate group was higher than that of the novel eggshell powder group (P < 0.05). The average ΔSa value of the sodium bicarbonate group was higher than that of the novel eggshell powder group (P < 0.05).Conclusion: Sodium bicarbonate powder showed higher stain removal ability and surface roughness changes than the novel eggshell powder.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"1-4"},"PeriodicalIF":1.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142546049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of coffee roasting level on tooth discoloration. 咖啡烘焙水平对牙齿变色的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-16 Epub Date: 2024-12-06 DOI: 10.2334/josnusd.24-0287

Soyeon Kim, Sri Larnani, Noha Taymour, Shin Hye Chung, Murali Srinivasan, Young-Jae Kim, Young-Seok Park

{"title":"Effect of coffee roasting level on tooth discoloration.","authors":"Soyeon Kim, Sri Larnani, Noha Taymour, Shin Hye Chung, Murali Srinivasan, Young-Jae Kim, Young-Seok Park","doi":"10.2334/josnusd.24-0287","DOIUrl":"10.2334/josnusd.24-0287","url":null,"abstract":"Purpose: Coffee consumption is a well-known contributor to tooth discoloration, and the extent of staining is influenced by the chemical composition of the coffee. This study investigated the associations of coffee roasting level, chlorogenic acid (CGA) content, absorbance level, and their combined effects with tooth discoloration.Methods: Bovine tooth enamel specimens were immersed in light, medium, and dark roasts of four coffee types (two Arabica and two Robusta coffees) for 72 h. High-performance liquid chromatography (HPLC) was used to measure CGA content, absorbance levels were estimated by using pigment concentration, and discoloration was assessed by spectrophotometry. The data were analyzed with the Friedman test.Results: Medium roasts induced the greatest discoloration, and tooth specimens immersed in Ethiopia Arabica exhibited the greatest color difference based on CIEDE2000 (ΔE00 at 72 h: 13.51 ± 4.63). Light roasts induced the least staining, despite having the highest CGA content. Dark roasts showed the highest absorbance, indicating a higher pigment concentration. Friedman analysis revealed a significant difference in color change in relation to roasting level for all coffee types.Conclusion: The present findings indicate that tooth discoloration is caused by the complex interaction of CGA, melanoidins, and roasting level. Because of the interplay of these factors, medium roasting had the greatest effect on discoloration.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"14-18"},"PeriodicalIF":1.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of different types of molds on the color difference, translucency, surface roughness, and hardness of a maxillofacial silicone elastomer. 不同类型的模具对颌面硅胶弹性体的色差、透明度、表面粗糙度和硬度的影响。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-16 Epub Date: 2024-12-06 DOI: 10.2334/josnusd.24-0212

Ceyda B İnal, Merve Bankoğlu Güngör, Bilge Turhan Bal, Seçil Karakoca Nemli

{"title":"Effects of different types of molds on the color difference, translucency, surface roughness, and hardness of a maxillofacial silicone elastomer.","authors":"Ceyda B İnal, Merve Bankoğlu Güngör, Bilge Turhan Bal, Seçil Karakoca Nemli","doi":"10.2334/josnusd.24-0212","DOIUrl":"10.2334/josnusd.24-0212","url":null,"abstract":"Purpose: The purpose of the present study was to evaluate the effects of dental stone molds and three dimensional (3D)-printed molds on the color difference, translucency, surface roughness, and hardness of maxillofacial silicones.Methods: To prepare molds, a rectangular body 20 mm in diameter and 2 mm in thickness, was designed with computer-aided design software. Two different dental gypsum molds were prepared with the lost-wax technique. Silicone mixture was poured into molds and polymerized at room temperature for 24 h. Color parameters were measured using a spectrophotometer. A profilometer was used for measuring surface roughness, and Shore A values were obtained with a durometer.Results: Color change (ΔE00) values of the 3D-resin group (1.53 ± 0.35) were significantly lower than others. The highest translucency parameter (TP) values belonged to the stainless steel group (12.44 ± 0.65). Surface roughness values (Ra) of the stainless steel group (0.28 ± 0.06) were significantly lower than other groups. The mean Shore A value of the 3D-resin group (23.90 ± 1.37) was significantly higher than the blue gypsum group (21.53 ± 0.93).Conclusion: Lower color difference and higher Shore A values were examined with 3D-printed resin molds. The highest TP values and lowest Ra values were obtained when stainless steel was used for molding of maxillofacial silicone.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"19-23"},"PeriodicalIF":1.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effects of reduced graphene oxide on the antibacterial activity of calcium hydroxide-based intracanal medicaments containing different vehicles. 还原氧化石墨烯对含不同载体的氢氧化钙基管内药物抗菌活性的协同作用。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0223

Mi-Ah Kim, Min-Kyeong Kim, Eun-Sook Kang, Kyung-San Min

{"title":"Synergistic effects of reduced graphene oxide on the antibacterial activity of calcium hydroxide-based intracanal medicaments containing different vehicles.","authors":"Mi-Ah Kim, Min-Kyeong Kim, Eun-Sook Kang, Kyung-San Min","doi":"10.2334/josnusd.24-0223","DOIUrl":"10.2334/josnusd.24-0223","url":null,"abstract":"Purpose: This study investigated the synergistic effects of reduced graphene oxide (RGO) on the antibacterial activity of three calcium hydroxide-based intracanal medicaments with different vehicles.Methods: Multispecies biofilms were cultured in a bovine root canal model. Intracanal medicaments containing nonaqueous vehicles, including N-methyl-2-pyrrolidone (NMP; CleaniCal), propylene glycol (PG; UltraCal XS), and polyethylene glycol (PEG; Calcipex II), were placed in the model. The synergistic effects of RGO were evaluated by analyzing colony-forming units, extracellular deoxyribonucleic acid (eDNA) levels, and findings from confocal laser-scanning microscopy (CLSM) and scanning electron microscopy. To evaluate the cytotoxicity of each vehicle, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed. To determine whether RGO altered the physicochemical properties of the medicaments, flowability and pH were measured. A P-value of <0.05 was considered to indicate statistical significance.Results: In the CleaniCal group, bacterial viability, eDNA levels, and extracellular polymeric substrate (EPS) were significantly lower in the presence of RGO. However, only bacterial viability significantly differed in the other groups. PEG resulted in the highest cell viability among the vehicles. Furthermore, there was no significant difference in flowability or pH in relation to the inclusion of RGO.Conclusion: The results suggest that RGO enhances the antibacterial effect of intracanal medicaments containing NMP.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 1","pages":"35-40"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differences in the effectiveness of stabilization splints between the categories of sleep bruxism. 稳定夹板在睡眠磨牙症类别间有效性的差异。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0233

Yasushi Onoguchi, Kyosuke Oki, Yoshihiro Tsukiyma, Yasunori Ayukawa, Kiyoshi Koyano

{"title":"Differences in the effectiveness of stabilization splints between the categories of sleep bruxism.","authors":"Yasushi Onoguchi, Kyosuke Oki, Yoshihiro Tsukiyma, Yasunori Ayukawa, Kiyoshi Koyano","doi":"10.2334/josnusd.24-0233","DOIUrl":"https://doi.org/10.2334/josnusd.24-0233","url":null,"abstract":"Purpose: The present study investigated the effects of stabilization splints on two categories of sleep bruxism using a portable electromyographic recording system.Methods: Twenty-six individuals confirmed as mild to severe bruxers by nocturnal masseter electromyographic episodes were enrolled in the study. Participants wore a stabilization splint during sleep for 30 nights, and masseter muscle activity was measured at baseline, immediately after, and 1 and 4 weeks after insertion of the splint. Bursts in masseter electromyographic episodes were separated into phasic bursts or tonic bursts, then each burst was analyzed in terms of duration, frequency, and magnitude of bursts.Results: The frequency of phasic bursts significantly decreased immediately after insertion of the splint compared with the baseline. The geometric mean magnitude of tonic bursts decreased when wearing the splint compared with the baseline.Conclusion: These findings suggest that stabilization splints reduce jaw-muscle activity during sleep in patients suffering from sleep bruxism by reducing the frequency of phasic bursts in the short term and reducing the magnitude of tonic bursts over a longer period.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"101-105"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144009577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tomographic and 3-dimensional imaging of the larger recurved caniniform teeth on the jawbone of Caprodon schlegelii. 施莱格龙下颌骨大犬齿的层析成像和三维成像。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0414

Bin Honjo, Yosuke Yamazaki, Maki Yuguchi, Keitaro Isokawa

{"title":"Tomographic and 3-dimensional imaging of the larger recurved caniniform teeth on the jawbone of Caprodon schlegelii.","authors":"Bin Honjo, Yosuke Yamazaki, Maki Yuguchi, Keitaro Isokawa","doi":"10.2334/josnusd.24-0414","DOIUrl":"10.2334/josnusd.24-0414","url":null,"abstract":"Purpose: This study aimed to characterize the 3-dimensional morphology of larger recurved caniniform teeth (LrCTs) and their underlying intraosseous structures in Caprodon schlegelii.Methods: Specimens (n = 5) with a total length of approximately 32 cm were fixed and processed for micro-computed tomography and/or stereomicroscopy. Volume data of the LrCT-bearing jaws were examined using volume rendering images.Results: The LrCTs were identified in six locations on the jawbones: anteriorly, a pair of LrCTs in each of the jaw quadrants, and posteriorly, tandemly aligned rows of LrCTs in the dentary bones. In both cases, two adjacent LrCTs were in different stages of tooth life, namely, developmental and functional stages. Large intraosseous chambers contained the tooth germ area or were connected to the pulp of the overlying LrCTs. In the lower jaw, the chambers beneath the anterior and posterior LrCTs were connected to the canal systems, which were distributed in the lower and upper halves of the dentary bone, respectively.Conclusion: The presence of LrCTs in six different locations on the jaws is a distinguishing feature of C. schlegelii, and a balanced replacement between developing and functional LrCTs is likely to ensure the mode and behavior of feeding in this species.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 1","pages":"46-52"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of sintering temperature on crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate and zirconia-reinforced nanolithium silicate ceramics. 烧结温度对纳米硅酸锂和氧化锆增强纳米硅酸锂陶瓷晶体结构、光学和热性能、表面粗糙度和形貌的影响

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0318

Supontep Teerakanok, Chatcharwin Ungurawasaporn, Pitchaporn Kosago, Boonlert Kukiattrakoon

{"title":"Effect of sintering temperature on crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate and zirconia-reinforced nanolithium silicate ceramics.","authors":"Supontep Teerakanok, Chatcharwin Ungurawasaporn, Pitchaporn Kosago, Boonlert Kukiattrakoon","doi":"10.2334/josnusd.24-0318","DOIUrl":"https://doi.org/10.2334/josnusd.24-0318","url":null,"abstract":"Purpose: This study evaluated the effects of sintering temperature on the crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate ceramics (NLDS) and zirconia-reinforced nanolithium silicate ceramics (ZNLS).Methods: One hundred and twenty specimens of each ceramics were prepared and divided into 4 groups on the basis of sintering temperature. The specimens were then subjected to X-ray diffraction (XRD), spectrophotometric analysis of optical properties, differential thermal analysis (DTA), thermal gravimetrical analysis (TGA), roughness analysis, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) spectrometry. The data were analyzed using one-way analysis of variance followed by Tukey's test (α = 0.05)Results: XRD confirmed the presence of lithium disilicate, lithium phosphate, lithium metasilicate, and quartz in NLDS and ZNLS specimens. TGA, DTA, and average roughness did not significantly differ between groups (P < 0.05). Among NLDS groups, NLDS4 had ∆E values that significantly differed from those of the other groups (P < 0.05). EDX showed that NLDS2 had the highest Si value (25.3 ± 0.1 wt%) followed by NLDS4 (24.8 ± 0.1 wt%). Among ZNLS groups, ZNLS2-4 had a clinically acceptable ∆E. EDX analysis showed no significant difference for any group.Conclusion: Sintering temperature did not affect the evaluated properties of NLDS. However, sintering ZNLS at different temperatures might affect the tested properties.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"77-82"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143988969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel approach for forensic dental identification using maxillary homologous models. 利用上颌同源模型进行法医鉴定的新方法。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0332

Isuruni Kuruppuarachchige, Upul Cooray, Toshihiko Suzuki, Moe Kosaka, Yuka Hatano

{"title":"Novel approach for forensic dental identification using maxillary homologous models.","authors":"Isuruni Kuruppuarachchige, Upul Cooray, Toshihiko Suzuki, Moe Kosaka, Yuka Hatano","doi":"10.2334/josnusd.24-0332","DOIUrl":"https://doi.org/10.2334/josnusd.24-0332","url":null,"abstract":"Purpose: As three-dimensional (3D) intraoral scans are becoming popular in modern dentistry, they also offer a new category of antemortem data for forensic identification. This study proposes a novel methodology for individual identification based on 3D homologous models of the maxilla.Methods: Data from 100 maxillary plaster casts (40 monozygotic twin casts, 28 dizygotic twin casts and 32 singleton casts) were used. From the initial sample, 10 casts were randomly chosen and duplicated four times, resulting in 40 duplicates. These were divided into four groups and subjected to the following alterations: molar attrition (n = 10), canine attrition (n = 10), molar and canine attrition (n = 10), and no alteration (n = 10). All the casts were converted to 3D models and then to homologous models using a template with 24 landmarks. The 3D coordinates of each vertex in the homologous model were then calculated and used for statistical comparison of similarity between two given homologous models using the average Hausdorff distance.Results: All four groups achieved accurate matching with their original maxillary casts, with a minimal average Hausdorff distance.Conclusion: This method accurately identified individuals, including monozygotic twins, and exhibited robustness against minor tooth attrition, demonstrating its feasibility as an identification method in actual forensic settings.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"59-64"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144018553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A retrospective cross-sectional analysis of the association between the number of medications and oral functions in university hospital outpatients. 回顾性横断面分析在大学医院门诊患者的药物数量和口腔功能之间的关系。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0281

Kaori Nishimura, Yoichiro Ogino, Yasunori Ayukawa

{"title":"A retrospective cross-sectional analysis of the association between the number of medications and oral functions in university hospital outpatients.","authors":"Kaori Nishimura, Yoichiro Ogino, Yasunori Ayukawa","doi":"10.2334/josnusd.24-0281","DOIUrl":"10.2334/josnusd.24-0281","url":null,"abstract":"Purpose: The purpose of this study was to analyze the association between the number of medications and oral functions.Methods: The study participants were selected from individuals who were attending regular follow-up as hospital outpatients. Patient profiles, the number of medications used, and measured values of oral function were extracted. These data were analyzed statistically for sex, age, and grouping according to the number of medications taken (no medication, G1; 1-4 medications, G2; ≥5 medications, G3). Conditional logistic regression analysis was performed to evaluate the effects of medications on oral function.Results: A total of 172 patients (66 males and 106 females) were registered; 50 participants belonged to G1, 68 to G2, and 54 to G3. Significant inter-group differences were identified for tongue-lip motor function (oral diadochokinesis: ODK) and maximum tongue pressure in terms of age, but not in terms of sex. G3 showed significantly lower ODK than G1, and logistic regression analysis revealed that the number of medications was significantly associated with ODK/pa/. Age and MTP also significantly affected ODK/ta/ and /ka/.Conclusion: Within the limitations of this study, the present findings suggest that the number of medications taken has an impact on tongue-lip motor function.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 1","pages":"41-45"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of calcium and phosphate in an artificial chemical model of root caries formation. 钙和磷酸盐在根龋形成的人工化学模型中的作用。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0427

Zaid Dohan, Lara T Friedlander, Paul R Cooper, Kai Chun Li, Jithendra T Ratnayake, May Lei Mei

{"title":"Effect of calcium and phosphate in an artificial chemical model of root caries formation.","authors":"Zaid Dohan, Lara T Friedlander, Paul R Cooper, Kai Chun Li, Jithendra T Ratnayake, May Lei Mei","doi":"10.2334/josnusd.24-0427","DOIUrl":"https://doi.org/10.2334/josnusd.24-0427","url":null,"abstract":"Purpose: To investigate the mineral density of artificial root caries lesions formed under varying concentrations of calcium phosphate, with or without the presence of fluoride.Methods: Sixty-four human tooth root blocks were exposed to various lactic acid solutions for 96 h. These included a low concentration (0.16 mM) of calcium chloride and potassium dihydrogen phosphate (Group L), a low concentration (0.16 mM) of calcium chloride and potassium dihydrogen phosphate with 0.5 ppm fluoride (with sodium fluoride) (Group LF), a high concentration (2.2 mM) of calcium chloride and potassium dihydrogen phosphate (Group H), and a high concentration (2.2 mM) of calcium chloride and potassium dihydrogen phosphate with 0.5 ppm fluoride (Group HF). The mineral loss in the artificial lesions formed was measured using micro-computed tomography.Results: The mineral loss in groups L, LF, H and HF was 35.38 ± 2.15%, 31.96 ± 2.1%, 32.58 ± 1.15%, and 27.78 ± 2.3%, respectively. A significant difference (P < 0.001) was observed between groups L and LF, groups LF and HF, groups H and HF, and groups L and HF. Calcium phosphate and fluoride exposure both had significant effects (P < 0.001) on mineral loss.Conclusion: Artificial root caries lesions were associated with decreased mineral loss in solutions containing higher concentrations of calcium phosphate or in the presence of fluoride, compared with those formed in solutions with lower calcium phosphate concentrations or without fluoride.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"96-100"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143977091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0