Effect of cut‐out rescan procedures on the accuracy of an intraoral scanner used for digitizing an ear model: An in vitro study

alexandrossfakianakis shared this article with you from Inoreader Effect of cut‐out rescan procedures on the accuracy of an intraoral scanner used for digitizing an ear model: An in vitro study via Journal of Prosthodontics Abstract Purpose The purpose of this study was to evaluate the impact of the rescanning of mesh holes of different diameters on the accuracy of an intraoral scanner (IOS) used to digitize an ear model. Materials and methods An ear model was digitized using an intraoral scanner (Medit i500) to obtain a reference mesh. A baseline experimental scan was created by editing a duplicate of the reference mesh using the cut-out tool of the IOS software. Three equal groups were created based on the diameter of the cut-out areas: 2-mm (G1), 5mm (G2), and 8-mm (G3) (n = 15). The cut-out areas were rescanned and a total of 45 digital files were exported. The discrepancy between the reference and the experimental digital scans was measured using the root mean square calculation (RMS). The data were analyzed by a Kruskal–Wallis test followed by a post hoc Dunn's test with Bonferroni correction. Results The trueness values ranged from 19.53 to 27.13 μm. There were significant differences in the RMS error values among the groups tested (p<.001) and post hoc multiple comparisons showed significant differences between the G1 and G2 groups (p = .04), G1 and G3 groups (p<.001), and G2 and G3 groups (p = .004). Overall, the precision values ranged from 4.93 to 7.73 μm and significant differences in the RMS values were only found between the G1 and G2 groups (p = .014). Conclusions Mesh hole rescanning affected the scanning accuracy (trueness and precision) of the IOS tested. The larger the diameter of the mesh holes, the less the trueness of the IOS tested. The precision values seemed to be less affected compared with the trueness by the cut-out and rescanning procedures. This article is protected by copyright. All rights reserved View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Survival rates, patient satisfaction, and prosthetic complications of implant fixed complete dental prostheses: A 12‐month prospective study

alexandrossfakianakis shared this article with you from Inoreader Survival rates, patient satisfaction, and prosthetic complications of implant fixed complete dental prostheses: A 12‐month prospective study via Journal of Prosthodontics Abstract Purpose To determine the survival rate, incidence of prosthetic complications and patient satisfaction of implant fixed complete dental prostheses (IFCDPs) after a mean observation period of 1.4 years. Materials and Methods Twenty-eight (28) eligible participants were recruited according to specific inclusion and exclusion criteria. The definitive metal-acrylic resin IFCDPs consisted of titanium bars veneered with acrylic resin and acrylic denture teeth. Prosthodontic complications, divided into major and minor, were monitored. Parameters such as gender, jaw location, bruxism, and occlusal scheme were evaluated. Moreover, a questionnaire was administered throughout the study to assess patient satisfaction. Poisson regression as well as repeated measures ANOVA were used for statistical analysis. Results Fourteen (14) males and 14 females were enrolled and followed-up at 3, 6, and 12 months. All IFCDPs survived (100% survival rate). The most frequent minor complication was the loss of material used to close the screw access hole (20% out of total complications). The most frequent major complication was chipping of the acrylic denture teeth (77.14% out of total complications). Gender (P = 0.008) and bruxism (P = 0.030) were significant predictors for the total major complications (major wear and major chipping) while occlusal scheme was a significant predictor for major chipping events (P = 0.030). Conclusions While IFCDPs demonstrated high prosthetic survival rates, they also exhibited a high number of chipping events of the acrylic veneering material, especially in males, bruxers, and individuals with canine guidance occlusion. However, the occurrence of these prosthetic complications did not negatively affect patient satisfaction. This article is protected by copyright. All rights reserved View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Influence of geometric dimensions on early failures of adhesively retained composite resin core build‐ups

alexandrossfakianakis shared this article with you from Inoreader Influence of geometric dimensions on early failures of adhesively retained composite resin core build‐ups via Journal of Esthetic and Restorative Dentistry Abstract Objective To determine the influence of the geometric dimensions of core build-ups on early core build-up failure, that is, loss before definitive prosthesis cementation. Materials and Methods Adhesive core build-ups of exclusively vital teeth in 114 participants were evaluated (n materials: 40 Rebilda DC, 38 Multicore Flow, 36 Clearfil DC Core; n teeth: 8 incisors, 54 premolars, 52 molars). Impressions of the abutment teeth were made (1) after removal of insufficient restorations/caries and (2) after core build-up and preparation for a fixed prosthesis. Digitized model surfaces of both situations were aligned (Geomagic Design X) and core build-up volume (V CBU), remaining hard tissue volume (V Abut), and size of the adhesive surface (A adh) were assessed. The derived measure d CBU = V CBU/A adh can be interpreted as mean arithmetic core build-up thickness. Associations between participant or core build-up design characteristics and the occurrence of early failures were statistically evaluated (SPSS v27, α = 0.05). Results A total of six (5.3%) core build-up failures were registered. Higher participant age, greater core build-up volume V CBU and greater arithmetic uniform thickness d CBU were associated with a greater incidence of failure in bivariate and univariate, however, not in multivariate statistics. Conclusions Core build-up volume and thickness were associated with early success or failure. Clinical Significance In the case of voluminous/thick core build-ups in relation to the adhesive surface, additional measures, such as the preparation of retentive elements to increase the bonding area, might be considered to reduce the risk of early core build-up failure. View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Clinical features, treatment outcomes and prognostic factors of allopurinol‐induced DRESS

alexandrossfakianakis shared this article with you from Inoreader Clinical features, treatment outcomes and prognostic factors of allopurinol‐induced DRESS in 52 patients via Journal of Clinical Pharmacy and Therapeutics This study included 52 patients. The average age of the patients was 56.1 ± 17.1 years. The ratio of men to women was 3.7 to 1. The mean of latency periods was 24.6 ± 15.0 days. Most patients presented with fever and skin rash in association with facial edema, lymphadenopathy, leukocytosis, eosinophilia, and atypical lymphocytosis. Liver and kidney injury were the most common visceral manifestation. Pulmonary involvement, cardiac involvement and gastrointestinal involvement were relatively less known but severe complications. Two patients showed nervous system involved. HLA-B*5801 allele was tested in 18 patients. 88.9% (16/18) of cases were positive. 92.3% (48/52) of patients were treated with oral glucocorticoids. 25.0% of patients were died. Advanced age, underlying cardiovascular disease, chronic kidney disease and high dose of allopurinol, infection and internal organ involvement (including kidney, heart, lung and gastrointestinal tract) were risk factors for death. Abstract What is Known and Objective Allopurinol-induced drug reaction with eosinophilia and systemic symptoms (DRESS) is a rare but serious and potentially life-threatening drug hypersensitivity syndrome. In this study, we aimed to investigate the clinical features, treatment outcomes, and prognostic factors of allopurinol-induced DRESS. Methods Case reports of allopurinol-induced DRESS published by China from January 2000 to August 2021 were retrieved from CNKI, Wan Fang, VIP, and PubMed databases for analysis. Results and Discussion This study included 52 patients, consisting of 41 (78.8%) males and 11 (21.2%) females (M:F = 3.7:1). The mean of age was 56.1 ± 17.1 years (range: 18–86 years). The mean of latency periods was 24.6 ± 15.0 days (range:1-63 days). Most patients presented with fever, cutaneous eruption, eosinophilia, lymphadenopathy, and facial edema. 36/52 (69.2%) patients showed two or more internal organs involved. Liver and kidney injuries were the most common visceral manifestation. Pulmonary involvement (34.6%), cardiac involvement (25.0%) and gastrointestinal involvement (21.2%) were relatively less known but severe complications. 2/52 (3.8%) patients showed nervous system involved, presenting as leukoencephalopathy or peripheral neuropathy. 2/52 (3.8%) patients presented with secondary hemophagocytic lymphohistiocytosis.1/52 (1.9%) patient developed pure red cell aplasia and 1/52 (1.9%) patient developed painless thyroiditis. HLA*B 58:01 allele was tested in 18/ 52 (34.6%) patients. 16/18 (88.9%) cases were positive. 48/52 (92.3%) patients were treated with systemic corticosteroids. 16/52 (30.8%) patients were cured, 23/52 (44.2%) patients received partial recovery, and 13/52 (25.0%) patients were died. Septic shock, gastrointestinal bleeding and multiple organ failure were the leading causes of death. Advanced age, underlying cardiovascular disease, chronic kidney disease and high dose of allopurinol, infection and internal organ involvement (including kidney, heart, lung and gastrointestinal tract) were risk factors for death. What is New and Conclusion We explored clinical features, treatment outcomes and prognostic factors of 52 allopurinol-induced DRESS cases in China. Ethnicity, especially Han Chinese, and positive HLA-B*58:01 allele are the clearest risk factors so far. Advanced age, underlying cardiovascular disease, chronic kidney disease and high dose of allopurinol, infection and internal organ involvement (including kidney, heart, lung and gastrointestinal tract) were associated with poorer outcomes. Early identification and discontinuation of the causative drug are crucial to the management of DRESS. For patients with severe disease, corticosteroids are recommended as the first-line therapy. However, further studies are needed to address diagnostic criteria of DRESS for early diagnosis, as well as to develop standardized corticosteroid treatment regimens. View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Periodontal ligament fibroblasts-derived exosomes induced by PGE2 inhibit human periodontal ligament stem cells osteogenic differentiation via activating miR-34c-5p/SATB2/ERK

alexandrossfakianakis shared this article with you from Inoreader Periodontal ligament fibroblasts-derived exosomes induced by PGE<sub>2</sub> inhibit human periodontal ligament stem cells osteogenic differentiation via activating miR-34c-5p/SATB2/ERK via ScienceDirect Publication: Experimental Cell Research Publication date: Available online 15 August 2022 Source: Experimental Cell Research Author(s): Chen Lin, Yingying Yang, Yingxue Wang, Heng Jing, Xinyi Bai, Zheng Hong, Chunxiang Zhang, Hui Gao, Linkun Zhang View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

IDH1/2 wildtype gliomas grade 2 and 3 with molecular glioblastoma-like profile have a distinct course of epilepsy compared to IDH1/2 wildtype glioblastomas

alexandrossfakianakis shared this article with you from Inoreader IDH1/2 wildtype gliomas grade 2 and 3 with molecular glioblastoma-like profile have a distinct course of epilepsy compared to IDH1/2 wildtype glioblastomas via Neuro-Oncology Advance Access Abstract Background IDH1/2 wildtype (IDHwt) glioma WHO grade 2 and 3 patients with pTERT mutation and/or EGFR amplification and/or +7/−10 chromosome gain/loss have a similar overall survival time as IDHwt glioblastoma patients, and are both considered glioblastoma IDHwt according to the WHO 2021 classification. However, differences in seizure onset have been observed. This study aimed to compare the course of epilepsy in the two glioblastoma subtypes. Methods We analyzed epilepsy data of an existing cohort including IDHwt histologically lower-grade glioma WHO grade 2 and 3 with molecular glioblastoma-like profile (IDHwt hLGG) and IDHwt glioblastoma patients. Primary outcome was the incidence proportion of epilepsy during the disease course. Secondary outcomes included, among others, onset of epilepsy, number of seizure days and antiepileptic drug (AED) polytherapy. Results Out of 254 pa tients, 78% (50/64) IDHwt hLGG and 68% (129/190) IDHwt glioblastoma patients developed epilepsy during the disease (p=0.121). Epilepsy onset before histopathological diagnosis occurred more frequently in IDHwt hLGG compared to IDHwt glioblastoma patients (90% versus 60%, p<0.001), with a significantly longer median time to diagnosis (3.5 versus 1.3 months, p<0.001). Median total seizure days was also longer for IDHwt hLGG patients (7.0 versus 3.0, p=0.005), and they received more often AED polytherapy (32% versus 17%, p=0.028). Conclusions Although the incidence proportion of epilepsy during the entire disease course is similar, IDHwt hLGG patients show a significantly higher incidence of epilepsy before diagnosis and a significantly longer median time between first seizure and diagnosis compared to IDHwt glioblastoma patients, indicating a distinct clinical course. View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Translational Significance of CDKN2A/B Homozygous Deletion in IDH-Mutant Astrocytoma

alexandrossfakianakis shared this article with you from Inoreader Translational Significance of CDKN2A/B Homozygous Deletion in IDH-Mutant Astrocytoma via Neuro-Oncology Advance Access Abstract Isocitrate dehydrogenase (IDH) 1 or 2 mutations confer a favorable prognosis compared to IDH-wildtype in astrocytoma, frequently denoting a lower grade malignancy. However, recent molecular profiling has identified specific aggressive tumor subgroups with clear clinical prognostic implications that are independent of histologic grading. The homozygous deletion of CDKN2A/B is the strongest implicated independent indicator of poor prognosis within IDH-mutant astrocytoma, and the identification of this alteration in these lower histologic grade tumors transforms their biology toward an aggressive grade 4 phenotype clinically. CDKN2A/B homozygous deletion is now sufficient to define a grade 4 tumor in IDH-mutant astrocytomas regardless of histologic appearance, yet there are currently no effective molecularly informed targeted therapies for these tumors. The biologic impact of CDKN2A/B homozygous deletion in IDH-mutant tumors and the optimal treatmen t strategy for this molecular subgroup remains insufficiently explored. Here we review the current understanding of the translational significance of homozygous deletion of CDKN2A/B gene expression in IDH-mutant astrocytoma and associated diagnostic and therapeutic implications. View on Web

Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.