Effect of a novel bioceramic root canal sealer on the angiogenesis-enhancing potential of assorted human odontogenic stem cells compared with principal tricalcium silicate-based cements

Abstract Objective: This study evaluated the angiogenesis-enhancing potential of a tricalcium silicate-based mineral trioxide aggregate (ProRoot MTA), Biodentine, and a novel bioceramic root canal sealer (Well-Root ST) in human dental pulp stem cells (hDPSCs), human periodontal ligament stem cells (hPLSCs), and human tooth germ stem cells (hTGSCs). Methodology: Dulbecco's modified Eagle's medium was conditioned for 24 h by exposure to ProRoot MTA, Biodentine, or Well-Root ST specimens (prepared according to the manufacturers' instructions). The cells were cultured in these conditioned media and their viability was assessed with 3-(4,5-dimethyl-thiazol-2-yl)-5-(3-carboxy-methoxy-phenyl)-2-(4-sulfo-phenyl)-2H tetrazolium (MTS) on days 1, 3, 7, 10, and 14. Angiogenic growth factors [platelet-derived growth factor (PDGF), basic fibroblast growth factor (FGF-2), and vascular endothelial growth factor (VEGF)] were assayed by sandwich enzyme-linked immunosorbent assay (ELISA) on days 1, 7, and 14. Human umbilical vein endothelial cell (HUVEC) migration assays were used to evaluate the vascular effects of the tested materials at 6-8 h. Statistical analyses included Kruskal-Wallis, Mann-Whitney U, and Friedman and Wilcoxon signed rank tests. Results: None of tricalcium silicate-based materials were cytotoxic and all induced a similar release of angiogenic growth factors (PDGF, FGF-2, and VEGF) (p>0.05). The best cell viability was observed for hDPSCs (p<0.05) with all tricalcium silicate-based materials at day 14. Tube formation by HUVECs showed a significant increase with all tested materials (p<0.05). Conclusion: The tricalcium silicate-based materials showed potential for angiogenic stimulation of all stem cell types and significantly enhanced tube formation by HUVECs.

Two Cases of Unilateral Lichen Planus Following the Lines of Blaschko

A 50-year-old man and 71-year-old woman presented to our clinic with unilateral, linear, erythematous, pruritic lesions along the lines of Blaschko. On the basis of clinical and histopathological findings, the lesions were diagnosed as lichen planus with a Blaschkoian distribution, which is a rare form of lichen planus. The patients were treated with topical corticosteroids and antihistamines.

Clinical and Laboratory Findings of Pigmented Purpuric Dermatoses

BACKGROUND: Pigmented purpuric dermatoses (PPD) are chronic, recurrent group of disorders characterized by petechial and pigmentary macules usually localized on the lower limbs. Its etiopathogenesis is unknown. There are very few clinical and etiological studies on PPD in the literature. OBJECTIVE: We aim to examine the etiopathogenetic factors of PPD retrospectively. METHODS: Demographic characteristics, history of co-morbid disorders and drug usage, hepatitis markers, levels of serum lipids, findings of Doppler ultrasonography in lower extremities, and patch test results of the 24 patients of PPD were examined retrospectively. The patch test results, history of drug use, and co-morbid disorders of the patients were compared with those of the control groups. RESULTS: The male-to-female ratio was 1 : 2, and 83.3% of the patients had Schamberg disease. Seventeen patients had co-morbid disorders and 16 used various drugs, but there was no statistically significant difference between the controls and patients. One patient was positive for hepatitis B surface antigen and 1, for anti-hepatitis C virus antibody. Nine had elevated total cholesterol levels, and 5 had elevated triglyceride levels. Further, 30% of them were positive for at least 1 allergen, while 16% of the control subjects were positive for at least 1 allergen, but statistically significant difference was not found between the 2 groups. Variable degrees of venous insufficiency were detected in 75% of the patients on Doppler ultrasonography of the lower extremities. CONCLUSION: Venous insufficiency and hypercholesterolemia might be the basic predisposing factors for PPD. Further studies are needed to show if diabetes mellitus and hypertension may cause perivascular inflammation in PPD.

Skin Findings in Newborns and Their Relationship with Maternal Factors: Observational Research

BACKGROUND: Cutaneous lesions are commonly seen in the newborn period and exhibit inconsistency from the skin lesions of an adult. OBJECTIVE: The present study was carried out with an aim to determine the frequency of physiologic and pathologic cutaneous findings in newborns. METHODS: Typically, 1234 newborns were included in this study. A questionnaire about maternal gestational history, maternal and family history was issued to the parents of each newborn. The presence of cutaneous lesions was recorded. RESULTS: Overall, 642 (52%) of the newborns were male and 592 (48%) were female. Typically, 831 newborns (67.3%) had at least one cutaneous lesion. The prevalence of genital hyperpigmentation and milia was significantly higher in males. In premature newborns, the pervasiveness of cutis marmorata and genital hyperpigmentation was found to be significantly higher. Caput succedaneum, transient neonatal pustular melanosis and cyanosis appeared predominantly in vaginally born infants. Erythema toxicum neonatorum was seen in infants, who were born by cesarean section. The predominance of Mongolian spots and erythema toxicum neonatorum were significantly higher in the newborns of the multiparous mothers; however, caput succedaneum was significantly higher in newborns of the primiparous mothers. CONCLUSION: A number of studies about neonatal dermatoses have been carried out involving different methods in various countries. We consider that our study may be useful in literature, as it has been carried out involving large number of maternal parameters.