N. Kharouf, Francois Reitzer, Tarek Ashi, Noor Daras, Y. Haikel, Davide Mancino
Introduction: Some dental adhesive systems require an etching step using phosphoric acid in order to prepare dentin and enamel surfaces. This treatment modifies the surface characteristics and the chemical compositions of these hard tissues. Objectives: The aim of this in vitro study was to analyze chemical and microscopic effects of acid etching with rubbing technique on dental tissues. Material and methods: Sixteen extracted teeth were obtained. Two etching techniques (with and without rubbing) were used to treat the enamel and dentin surfaces. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were used to evaluate morphological and chemical changes of the enamel and dentin surfaces. Collected data were statistically analyzed by c2 and Mann-Whitney rank sum tests. Results: The enamel that was etched with rubbing technique for 30 s showed a great dissolution at inter-prismatic enamel level. The dentin, which was etched with rubbing technique for 15 s, revealed a larger tubules diameter and more open tubules than without rubbing technique. There were more silica particles on dentin etched by rubbing than without rubbing technique. Chemical analyses (EDX) showed that a dental surface etched using 37% phosphoric acid with rubbing technique revealed a surface rich in calcium, with a Ca/P ratio = 1.66 ± 0.05 near to Ca/P ratio = 1.67 of hydroxyapatite. Conclusions: Although phosphoric acid cleans the dental surface, it causes salts precipitation on the etched dental surface; these salts can be removed more efficiently by rubbing the acid and rinsing it, providing an optimal interface for the bonding.
{"title":"Effectiveness of etching with phosphoric acid when associated with rubbing technique","authors":"N. Kharouf, Francois Reitzer, Tarek Ashi, Noor Daras, Y. Haikel, Davide Mancino","doi":"10.5114/JOS.2021.104693","DOIUrl":"https://doi.org/10.5114/JOS.2021.104693","url":null,"abstract":"Introduction: Some dental adhesive systems require an etching step using phosphoric acid in order to prepare dentin and enamel surfaces. This treatment modifies the surface characteristics and the chemical compositions of these hard tissues. Objectives: The aim of this in vitro study was to analyze chemical and microscopic effects of acid etching with rubbing technique on dental tissues. Material and methods: Sixteen extracted teeth were obtained. Two etching techniques (with and without rubbing) were used to treat the enamel and dentin surfaces. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were used to evaluate morphological and chemical changes of the enamel and dentin surfaces. Collected data were statistically analyzed by c2 and Mann-Whitney rank sum tests. Results: The enamel that was etched with rubbing technique for 30 s showed a great dissolution at inter-prismatic enamel level. The dentin, which was etched with rubbing technique for 15 s, revealed a larger tubules diameter and more open tubules than without rubbing technique. There were more silica particles on dentin etched by rubbing than without rubbing technique. Chemical analyses (EDX) showed that a dental surface etched using 37% phosphoric acid with rubbing technique revealed a surface rich in calcium, with a Ca/P ratio = 1.66 ± 0.05 near to Ca/P ratio = 1.67 of hydroxyapatite. Conclusions: Although phosphoric acid cleans the dental surface, it causes salts precipitation on the etched dental surface; these salts can be removed more efficiently by rubbing the acid and rinsing it, providing an optimal interface for the bonding.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124416","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}
In dental education, assessment of students is of critical value to improve their performance in clinical settings. The assessment of students’ clinical performance includes various stages, where in certain cases, assessors en-counter challenges in providing final grades. This study sheds a light on assessment practices in clinical settings and focuses on assessors’ modulation of the whole cognitive process. The argument involves discussing critical thinking of assessors before, during, and after the event of assessment. Then, it analyzes a cognitive approach of assessment implied by assessors during students’ performance. Further, it proposes a model with step-by-step approach in decision-making along with different factors, which may strongly influence final grades. Four main stages were identified for the purpose of analysis, such as pre-decision, driver, primary decision, and communication stages. Each stage was supported by literary data, along with evidences worth consideration. Possible factors related to the assessment and assessors’ cognition that derived from literature were discussed in terms of the influence on the final decision towards more stringent or lenient decisions, following a temporal sequence for the proposed model events. Finally, both primary and secondary factors involved in each stage were presented.
{"title":"A proposed model of cognitive approach to assess clinical performance of dental students","authors":"A. Khalifah","doi":"10.5114/JOS.2021.104700","DOIUrl":"https://doi.org/10.5114/JOS.2021.104700","url":null,"abstract":"In dental education, assessment of students is of critical value to improve their performance in clinical settings. The assessment of students’ clinical performance includes various stages, where in certain cases, assessors en-counter challenges in providing final grades. This study sheds a light on assessment practices in clinical settings and focuses on assessors’ modulation of the whole cognitive process. The argument involves discussing critical thinking of assessors before, during, and after the event of assessment. Then, it analyzes a cognitive approach of assessment implied by assessors during students’ performance. Further, it proposes a model with step-by-step approach in decision-making along with different factors, which may strongly influence final grades. Four main stages were identified for the purpose of analysis, such as pre-decision, driver, primary decision, and communication stages. Each stage was supported by literary data, along with evidences worth consideration. Possible factors related to the assessment and assessors’ cognition that derived from literature were discussed in terms of the influence on the final decision towards more stringent or lenient decisions, following a temporal sequence for the proposed model events. Finally, both primary and secondary factors involved in each stage were presented.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71125026","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}
A. Thiruvalluvan, Jagat R.C. Reddy, Vandana Sekizhar, Veni Subramanyam, S. T., V. V.
Introduction: Salivary matrix metalloproteinase-9 Objectives: The current study aimed to estimate salivary MMP-9 in oral leukoplakia and oral submucous fibrosis (OSMF), which are considered as oral potentially malignant disorders (OPMDs). Material and methods: A comparative observational study of 60 subjects was conducted, including 20 patients diagnosed with OSMF (group A, n = 20), 20 diagnosed with oral leukoplakia (group B, n = 20), and 20 as healthy controls (group C, n = 20) according to standard criteria. Unstimulated salivary samples were collected for evaluation of MMP-9 by enzyme-linked immunosorbent assay (ELISA). One-way analysis of variance (ANOVA) test was applied for comparison of groups. Bonferroni-adjusted one-way ANOVA test was performed for intra-group comparison. Results: Descriptive statistics of the data revealed that mean age of study participants in group A, group B, and group C were 50.30 ± 9.96 years, 46.70 ± 12.59 years, and 33.30 ± 4.70 years, respectively. Mean salivary MMP-9 level in OSMF, oral leukoplakia, and control group were 9.42 ng/ml, 10.59 ng/ml, and 2.96 ng/ml, respectively, with a p -value < 0.001 between OSMF and oral leukoplakia when compared with controls. Conclusions: A significant difference was noted in salivary MMP-9 levels among patients with OPMD’s compared to controls. A slightly higher value of MMP-9 was observed in oral leukoplakia. Estimation of salivary MMP-9 level is a non-invasive and a reliable biomarker in diagnosis of OPMD’s and in accessing their malignant transformation.
{"title":"Estimation of salivary matrix metalloproteinase-9 in oral leukoplakia, oral submucous fibrosis, and healthy individuals: a comparative observational study","authors":"A. Thiruvalluvan, Jagat R.C. Reddy, Vandana Sekizhar, Veni Subramanyam, S. T., V. V.","doi":"10.5114/jos.2021.111644","DOIUrl":"https://doi.org/10.5114/jos.2021.111644","url":null,"abstract":"Introduction: Salivary matrix metalloproteinase-9 Objectives: The current study aimed to estimate salivary MMP-9 in oral leukoplakia and oral submucous fibrosis (OSMF), which are considered as oral potentially malignant disorders (OPMDs). Material and methods: A comparative observational study of 60 subjects was conducted, including 20 patients diagnosed with OSMF (group A, n = 20), 20 diagnosed with oral leukoplakia (group B, n = 20), and 20 as healthy controls (group C, n = 20) according to standard criteria. Unstimulated salivary samples were collected for evaluation of MMP-9 by enzyme-linked immunosorbent assay (ELISA). One-way analysis of variance (ANOVA) test was applied for comparison of groups. Bonferroni-adjusted one-way ANOVA test was performed for intra-group comparison. Results: Descriptive statistics of the data revealed that mean age of study participants in group A, group B, and group C were 50.30 ± 9.96 years, 46.70 ± 12.59 years, and 33.30 ± 4.70 years, respectively. Mean salivary MMP-9 level in OSMF, oral leukoplakia, and control group were 9.42 ng/ml, 10.59 ng/ml, and 2.96 ng/ml, respectively, with a p -value < 0.001 between OSMF and oral leukoplakia when compared with controls. Conclusions: A significant difference was noted in salivary MMP-9 levels among patients with OPMD’s compared to controls. A slightly higher value of MMP-9 was observed in oral leukoplakia. Estimation of salivary MMP-9 level is a non-invasive and a reliable biomarker in diagnosis of OPMD’s and in accessing their malignant transformation.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71125724","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}
G. Yermukhanova, V. Rusanov, A. Bayakhmetova, Y. Menchisheva, G. Ksetaeva, N. Yermukhanova
Introduction: Periodontitis is one of the most common oral infectious disease. Adipose tissue-derived mesenchymal stem cells (AD-MSCs) have become widely studied for their possibilities for regeneration of periodontal bone defect. However, bone regeneration efficiency of AD-MSCs combined with transplantation materials in periodontal bone defects remains unclear. Objectives: The purpose of the study was to compare the effects of two repair methods with and without application of AD-MSCs in a rabbit’s periodontal defect model. Material and methods: Experimental periodontitis was initiated in eighteen rabbits. Animals were divided into two groups, including Col-HA only (group 1) and Col-HA + AD-MSCs (group 2), and implanted in rabbit periodontitis-induced bone defect. To evaluate difference in these two groups, we used histological analysis of the samples and X-ray. For comparison of grey-level frequency in X-ray samples of the two groups, Otsu’s method was applied. Results: Post-operative wounds in group 2 healed three days earlier than in group 1, starting from a formation of fibrous tissue, cartilage, and osteoid tissue, and ending with a formation of full-plate bone tissue. X-ray evaluations showed that more intensive reparative regeneration in post-operative bone cavity was observed in animals of group 2. The 90 th day samples with AD-MSCs presented more differentiated gray-level than the 90 th day samples without AD-MSCs. Conclusions: The results of the study suggest that the use of transplantation material (Col-HA) with AD-MSCs has positive effects, contributing to the improvement of reparative regeneration of bone tissue in the periodontal bone defect area.
{"title":"Bone regeneration capacity of adipose tissue-derived stem cells in rabbit periodontitis-induced bone defect model","authors":"G. Yermukhanova, V. Rusanov, A. Bayakhmetova, Y. Menchisheva, G. Ksetaeva, N. Yermukhanova","doi":"10.5114/jos.2021.111655","DOIUrl":"https://doi.org/10.5114/jos.2021.111655","url":null,"abstract":"Introduction: Periodontitis is one of the most common oral infectious disease. Adipose tissue-derived mesenchymal stem cells (AD-MSCs) have become widely studied for their possibilities for regeneration of periodontal bone defect. However, bone regeneration efficiency of AD-MSCs combined with transplantation materials in periodontal bone defects remains unclear. Objectives: The purpose of the study was to compare the effects of two repair methods with and without application of AD-MSCs in a rabbit’s periodontal defect model. Material and methods: Experimental periodontitis was initiated in eighteen rabbits. Animals were divided into two groups, including Col-HA only (group 1) and Col-HA + AD-MSCs (group 2), and implanted in rabbit periodontitis-induced bone defect. To evaluate difference in these two groups, we used histological analysis of the samples and X-ray. For comparison of grey-level frequency in X-ray samples of the two groups, Otsu’s method was applied. Results: Post-operative wounds in group 2 healed three days earlier than in group 1, starting from a formation of fibrous tissue, cartilage, and osteoid tissue, and ending with a formation of full-plate bone tissue. X-ray evaluations showed that more intensive reparative regeneration in post-operative bone cavity was observed in animals of group 2. The 90 th day samples with AD-MSCs presented more differentiated gray-level than the 90 th day samples without AD-MSCs. Conclusions: The results of the study suggest that the use of transplantation material (Col-HA) with AD-MSCs has positive effects, contributing to the improvement of reparative regeneration of bone tissue in the periodontal bone defect area.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71125806","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}
Introduction: Although the developmental model of permanent tooth is considered to be similar to the better understood formation of deciduous tooth, the duration of subsequent stages differs significantly, and it is difficult to determine. Various sources report that agenesis is a result of genetic abnormality or a developmental disturbance caused in initiation stage. However, it seems that complete damage to the germ, sometimes referred to as “aplasia”, can occur during the entire early odontogenesis. Detailed antineoplastic treatment records and dental disturbances in children as a result of chemotherapy administration show the possibility to recognize not well-known early tooth development. Objectives: An attempt to discover some unexplained facts about early tooth development based on the cases of chemotherapy-induced agenesis. Material and methods: Thirty-eight cancer survivors presented for a check-up visit in the Pediatric Clinic fulfilled the study criteria. Clinical control and panoramic radiograph were performed to identify the developmental abnormalities of hard tissues. Medical records were also analyzed to distinguish the age and duration of the cytotoxic treatment. Thirty-one survivors showed long-term dental effects of therapy. Five participants had 13 teeth missing. Results: In the case of survivors with a lack of 6 teeth, germ-toxic drug administration was applied just before appositional growth. Individuals with 3 teeth missing started the therapy before or at the beginning of expected initiation stage. One patient with four second premolars missing was treated outside the early odontogenesis age period. Conclusions: Detailed analysis revealed hypothesis that the total toxic damage to the dental developing tissues is likely to occur even at the most advanced stadium of early development. A longer duration of early odontogenesis is also possible. The duration of particular stages in tooth formation can be revised based on the dental examination of cancer survivors.
{"title":"Tooth development in the light of chemotherapy-induced agenesis in cancer survivors","authors":"Anna Jodłowska, L. Postek-Stefańska","doi":"10.5114/JOS.2021.104695","DOIUrl":"https://doi.org/10.5114/JOS.2021.104695","url":null,"abstract":"Introduction: Although the developmental model of permanent tooth is considered to be similar to the better understood formation of deciduous tooth, the duration of subsequent stages differs significantly, and it is difficult to determine. Various sources report that agenesis is a result of genetic abnormality or a developmental disturbance caused in initiation stage. However, it seems that complete damage to the germ, sometimes referred to as “aplasia”, can occur during the entire early odontogenesis. Detailed antineoplastic treatment records and dental disturbances in children as a result of chemotherapy administration show the possibility to recognize not well-known early tooth development. Objectives: An attempt to discover some unexplained facts about early tooth development based on the cases of chemotherapy-induced agenesis. Material and methods: Thirty-eight cancer survivors presented for a check-up visit in the Pediatric Clinic fulfilled the study criteria. Clinical control and panoramic radiograph were performed to identify the developmental abnormalities of hard tissues. Medical records were also analyzed to distinguish the age and duration of the cytotoxic treatment. Thirty-one survivors showed long-term dental effects of therapy. Five participants had 13 teeth missing. Results: In the case of survivors with a lack of 6 teeth, germ-toxic drug administration was applied just before appositional growth. Individuals with 3 teeth missing started the therapy before or at the beginning of expected initiation stage. One patient with four second premolars missing was treated outside the early odontogenesis age period. Conclusions: Detailed analysis revealed hypothesis that the total toxic damage to the dental developing tissues is likely to occur even at the most advanced stadium of early development. A longer duration of early odontogenesis is also possible. The duration of particular stages in tooth formation can be revised based on the dental examination of cancer survivors.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124202","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}
C. Palmela Pereira, Anabela S Rodrigues, D. Augusto, Adriana Santos, F. Salvado, R. Santos, R. Cameriere
Introduction: In forensic science, age estimation for identification purposes of living and deceased individuals, is of great importance. It is crucial for humanitarian reasons in both civil and criminal cases. Objectives: The aim of this study was to contribute to the process of forensic age estimation using dental age assessment with mineralization stages of Demirjian method, and maturity indexes of permanent mandibular second (I 2M ) and third molars (I 3M ). Material and methods: Two samples were used from a Portuguese population; for I 2M , 591 orthopantomo graphy’s aged between 7 and 15 years and for I 3M , 350 orthopantomography’s aged between 12 and 23 years. Age estimation was obtained using linear regression models, each model was estimated with all observations and without observations, in which I 2M or I 3M = 0. Results: The results of ICC for intra and interobserver validation varied between 0.608 and 0.999 for both indexes. Pearson correlation coefficient between each index and chronological age showed that all indexes were significantly negatively correlated with chronological age. The standard error of estimate and the mean absolute error were continually low without patients with null index. Conclusions: Application of I2M is reproducible in a Portuguese population for medicallegal application in a population aged 7 to 15 years, when the corresponding index is positive. Third molar must be used only if its index is positive. The inclusion of Demirjian staging in both models significantly increases accuracy.
{"title":"Forensic age estimation using new models of mathematical regression formula constructed with molar indexes: dental age assessment","authors":"C. Palmela Pereira, Anabela S Rodrigues, D. Augusto, Adriana Santos, F. Salvado, R. Santos, R. Cameriere","doi":"10.5114/jos.2021.106540","DOIUrl":"https://doi.org/10.5114/jos.2021.106540","url":null,"abstract":"Introduction: In forensic science, age estimation for identification purposes of living and deceased individuals, is of great importance. It is crucial for humanitarian reasons in both civil and criminal cases. Objectives: The aim of this study was to contribute to the process of forensic age estimation using dental age assessment with mineralization stages of Demirjian method, and maturity indexes of permanent mandibular second (I 2M ) and third molars (I 3M ). Material and methods: Two samples were used from a Portuguese population; for I 2M , 591 orthopantomo graphy’s aged between 7 and 15 years and for I 3M , 350 orthopantomography’s aged between 12 and 23 years. Age estimation was obtained using linear regression models, each model was estimated with all observations and without observations, in which I 2M or I 3M = 0. Results: The results of ICC for intra and interobserver validation varied between 0.608 and 0.999 for both indexes. Pearson correlation coefficient between each index and chronological age showed that all indexes were significantly negatively correlated with chronological age. The standard error of estimate and the mean absolute error were continually low without patients with null index. Conclusions: Application of I2M is reproducible in a Portuguese population for medicallegal application in a population aged 7 to 15 years, when the corresponding index is positive. Third molar must be used only if its index is positive. The inclusion of Demirjian staging in both models significantly increases accuracy.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124795","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}
Recording the jaw relations is a critical step during the fabrication of complete dentures. Both vertical and horizontal relations must be correctly established to ensure efficient function of the complete dentures with the least amount of trauma to the supporting tissues and temporomandibular joints (TMJs). The aim of this review was to collect comprehensive data about the most recommended methods for determining the optimal vertical dimension of occlusion (VDO) during the fabrication of complete dentures and to determine whether and/or to what extent these methods respect the correct spatial relations in TMJs. An electronic search through the PubMed, Web of Science, OVID, SCOPUS and EBSCO search engines selected 111 references from peer-reviewed journals, which met the inclusion criteria for this literature review. The single, exclusive and scientifically confirmed consensus for the determination of both the VDO and centric relation during complete denture fabrication is still lacking. Authors agree that the establishment of an incorrect relation between the maxilla and mandible causes severe, mostly harmful consequences in the stomatognathic system. So far the available procedures are associated with a high degree of subjective clinical judgements and variability. Thus, ongoing studies with the application of new technologies are still current and strongly recommended.
下颌关系的记录是全口义齿制作的关键步骤。为了保证全口义齿在对支撑组织和颞下颌关节的损伤最小的情况下有效发挥功能，必须正确建立垂直和水平关系。本综述的目的是收集关于在全口义齿制造过程中确定最佳咬合垂直尺寸(VDO)的最推荐方法的综合数据，并确定这些方法是否和/或在多大程度上尊重tmj的正确空间关系。通过PubMed、Web of Science、OVID、SCOPUS和EBSCO搜索引擎进行电子检索，从同行评议期刊中筛选出111篇符合文献综述纳入标准的参考文献。在全口义齿制造过程中，对于VDO和中心关系的确定，目前还缺乏单一的、排他的和科学的共识。作者一致认为，在上颌骨和下颌骨之间建立不正确的关系会导致严重的，大多数是有害的口颌系统后果。到目前为止，可用的程序与高度主观的临床判断和可变性有关。因此，正在进行的研究与新技术的应用仍然是当前和强烈建议。
{"title":"Different approaches in determining the vertical and horizontal jaw relations during complete denture fabrication – a literature review","authors":"Maria Zielke, Joanna Jasnoch, I. Maciejewska","doi":"10.5114/JOS.2021.108874","DOIUrl":"https://doi.org/10.5114/JOS.2021.108874","url":null,"abstract":"Recording the jaw relations is a critical step during the fabrication of complete dentures. Both vertical and horizontal relations must be correctly established to ensure efficient function of the complete dentures with the least amount of trauma to the supporting tissues and temporomandibular joints (TMJs). The aim of this review was to collect comprehensive data about the most recommended methods for determining the optimal vertical dimension of occlusion (VDO) during the fabrication of complete dentures and to determine whether and/or to what extent these methods respect the correct spatial relations in TMJs. An electronic search through the PubMed, Web of Science, OVID, SCOPUS and EBSCO search engines selected 111 references from peer-reviewed journals, which met the inclusion criteria for this literature review. The single, exclusive and scientifically confirmed consensus for the determination of both the VDO and centric relation during complete denture fabrication is still lacking. Authors agree that the establishment of an incorrect relation between the maxilla and mandible causes severe, mostly harmful consequences in the stomatognathic system. So far the available procedures are associated with a high degree of subjective clinical judgements and variability. Thus, ongoing studies with the application of new technologies are still current and strongly recommended.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71125100","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}
{"title":"Association of self-reported symptoms of xerostomia with vaping and cigarette smoking: a cross-sectional study","authors":"A. Hasan, R. Salah, F. Farhan, A. Abdulkareem","doi":"10.5114/JOS.2021.109183","DOIUrl":"https://doi.org/10.5114/JOS.2021.109183","url":null,"abstract":"","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71125953","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}
Introduction: The increase in the intensity of caries and non-carious lesions of the teeth leads to significant disorders in the dentoalveolar apparatus manifested themselves not only as aesthetic but also as functional disorders in the absence of timely adequate treatment. Objectives: The increase in the prevalence and intensity of cervical lesions of hard dental tissues is the cause of aesthetic and functional disorders in the dentoalveolar apparatus. To study the morphological structure of enamel, its features depending on the presence and type of cervical pathology; to determine correlations of the chemical composition of enamel and dentin in intact teeth and with cervical pathology. Material and methods: There were examined 29 clinically extracted teeth of both jaws and their longitudinal sections using a JSM-6490 LV focused beam electron microscope with system of energy-dispersive X-ray microanalysis. The chemical composition of 290 enamel areas and 235 dentine areas in the incisal region (tubercle), equator, cervical area. Results: The correlation between enamel and dentin has been determined: inverse – based on the content of P and C, Ca and O (in all anatomical areas), Mg and Ca, Mg and P (in the incisal region (tubercle), equator); direct – based on the content of Mg and Ca, Mg and P (cervical area). The exception was the correlation between Mg and Ca in the incisal region (tubercle) in the group of the teeth with cervical pathology (r = 0.363), Ca and O in the cervical area in the group of the teeth with cervical caries and clinically intact hard tissues (r = 0.620). Conclusions: The revealed features in the morphological structure and chemical composition of enamel, the presence of the correlations with dentin will allow to understand the mechanism of the development of cervical pathology deeper and substantiate the principles of its treatment and prevention.
{"title":"Study of the morphological structure of enamel and correlation of its chemical composition with dentin in intact teeth and with a cervical pathology","authors":"I. Zabolotna","doi":"10.5114/JOS.2021.104691","DOIUrl":"https://doi.org/10.5114/JOS.2021.104691","url":null,"abstract":"Introduction: The increase in the intensity of caries and non-carious lesions of the teeth leads to significant disorders in the dentoalveolar apparatus manifested themselves not only as aesthetic but also as functional disorders in the absence of timely adequate treatment. Objectives: The increase in the prevalence and intensity of cervical lesions of hard dental tissues is the cause of aesthetic and functional disorders in the dentoalveolar apparatus. To study the morphological structure of enamel, its features depending on the presence and type of cervical pathology; to determine correlations of the chemical composition of enamel and dentin in intact teeth and with cervical pathology. Material and methods: There were examined 29 clinically extracted teeth of both jaws and their longitudinal sections using a JSM-6490 LV focused beam electron microscope with system of energy-dispersive X-ray microanalysis. The chemical composition of 290 enamel areas and 235 dentine areas in the incisal region (tubercle), equator, cervical area. Results: The correlation between enamel and dentin has been determined: inverse – based on the content of P and C, Ca and O (in all anatomical areas), Mg and Ca, Mg and P (in the incisal region (tubercle), equator); direct – based on the content of Mg and Ca, Mg and P (cervical area). The exception was the correlation between Mg and Ca in the incisal region (tubercle) in the group of the teeth with cervical pathology (r = 0.363), Ca and O in the cervical area in the group of the teeth with cervical caries and clinically intact hard tissues (r = 0.620). Conclusions: The revealed features in the morphological structure and chemical composition of enamel, the presence of the correlations with dentin will allow to understand the mechanism of the development of cervical pathology deeper and substantiate the principles of its treatment and prevention.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124275","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}
G. Suragimath, Divyanee Doshi, S. Varma, S. Zope, Ashwinirani
Introduction: Leptin is a peptide-based hormone, known to maintain fat reserves, and forms an integral part of host defense. The level of leptin is found to be altered in various inflammatory disorders, including periodontitis. The outcome of non-surgical periodontal therapy (NSPT) on leptin concentrations in the saliva and serum of patients with periodontitis is yet to be determined. Objectives: The aim of this study was to evaluate the effect of NSPT on salivary and serum leptin levels in patients suffering from generalized stage II grade B periodontitis. Material and methods: This randomized, controlled, clinical trial was conducted on forty-five subjects with normal body mass index, suffering from periodontal disease. Periodontal parameters (gingival index, probing pocket depth, plaque index, and clinical attachment loss) were recorded in a structured proforma. Salivary and serum leptin levels at baseline and three months post-NSPT (after scaling and root planning, followed up with oral hygiene instructions to patients) were analyzed using enzyme-linked immunosorbent assay. Descriptive statistics and paired t-test were applied to compare the variables. P-value < 0.05 was considered statistically significant. Results: The mean age of participants was 40.6 ± 4.2 years, with a male to female ratio 1 : 1.2. Significant improvements in the periodontal parameters were observed three months post-therapy (p < 0.001). The difference in serum leptin levels before and after NSPT was statistically significant with p < 0.001, whereas the difference in salivary leptin (SAL) levels before and after NSPT was negatively significant with p < 0.001. Conclusions: The serum leptin level significantly reduced, while SAL level significantly increased after NSPT. In other words, SAL levels of leptin can be used as a biomarker for periodontal health and disease.
{"title":"Effect of non-surgical periodontal therapy on salivary and serum leptin levels in patients with generalized stage II grade B periodontitis","authors":"G. Suragimath, Divyanee Doshi, S. Varma, S. Zope, Ashwinirani","doi":"10.5114/jos.2021.106267","DOIUrl":"https://doi.org/10.5114/jos.2021.106267","url":null,"abstract":"Introduction: Leptin is a peptide-based hormone, known to maintain fat reserves, and forms an integral part of host defense. The level of leptin is found to be altered in various inflammatory disorders, including periodontitis. The outcome of non-surgical periodontal therapy (NSPT) on leptin concentrations in the saliva and serum of patients with periodontitis is yet to be determined. Objectives: The aim of this study was to evaluate the effect of NSPT on salivary and serum leptin levels in patients suffering from generalized stage II grade B periodontitis. Material and methods: This randomized, controlled, clinical trial was conducted on forty-five subjects with normal body mass index, suffering from periodontal disease. Periodontal parameters (gingival index, probing pocket depth, plaque index, and clinical attachment loss) were recorded in a structured proforma. Salivary and serum leptin levels at baseline and three months post-NSPT (after scaling and root planning, followed up with oral hygiene instructions to patients) were analyzed using enzyme-linked immunosorbent assay. Descriptive statistics and paired t-test were applied to compare the variables. P-value < 0.05 was considered statistically significant. Results: The mean age of participants was 40.6 ± 4.2 years, with a male to female ratio 1 : 1.2. Significant improvements in the periodontal parameters were observed three months post-therapy (p < 0.001). The difference in serum leptin levels before and after NSPT was statistically significant with p < 0.001, whereas the difference in salivary leptin (SAL) levels before and after NSPT was negatively significant with p < 0.001. Conclusions: The serum leptin level significantly reduced, while SAL level significantly increased after NSPT. In other words, SAL levels of leptin can be used as a biomarker for periodontal health and disease.","PeriodicalId":35469,"journal":{"name":"Journal of Stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124685","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}
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