Kehoesheehan4619
The static fracture tests resulted in fracture limits of 1200 (± 293) N for the PMMA group, 1330 (± 219) N for the CoCr group and 899 (± 96) N for the human tooth group. Fatigue limits of 770N, 840N and 720N were determined for the PMMA group, CoCr group and human tooth group, respectively.
The determined fatigue limit of above 720N (depending on the core material) is sufficiently high and a good performance of this crown material is expected in the clinical loading life. The results showed that using artificial teeth instead of natural teeth for fatigue testing of crowns might result in an overestimation of the fatigue limits of the crown material.
PEKK-made crowns offer a stable and priceworthy treatment for patients, in particular those that suffer from metal allergy.
PEKK-made crowns offer a stable and priceworthy treatment for patients, in particular those that suffer from metal allergy.
The primary aim of this study was to investigate the effect associated with patients' factor such as systemic disease on the blood pressure of patients in dental procedure. The secondary aim of this study was to investigate the effect associated with systemic disease and antihypertensive on the blood pressure changes with local anesthesia.
The blood pressure was measured before and after local anesthesia injection for dental treatment. The effect associated with patients' factor such as systemic disease on the blood pressure and the effect on blood pressure changes of the type of antihypertensive drugs and the systemic disease were analyzed using a multivariate analysis of variance test.
We analyzed 1306 patients scheduled for the dental procedure. Age and some systemic diseases such as hypertension and angina pectoris affected blood pressure before local anesthesia. On the other hand, age and systemic diseases did not affect blood pressure changes. And, some antihypertensive affected systolic blood pressure changes.
The blood pressure change with local anesthesia was not associated with systemic diseases and age but was associated with antihypertensive agents. In particular, calcium channel blockers, angiotensin II receptor antagonists and alpha-blockers accentuate blood pressure reducing caused by local anesthesia.
The blood pressure change with local anesthesia was associated with antihypertensive agents. This study was registered with the University Hospital Medical Information Network Clinical Trials Registry (number UMIN000030695).
The blood pressure change with local anesthesia was associated with antihypertensive agents. This study was registered with the University Hospital Medical Information Network Clinical Trials Registry (number UMIN000030695).
This investigation evaluated the effect of flowable liners beneath a composite restoration applied via different methods on the pattern of shrinkage vectors.
Forty molars were divided into five groups (n = 8), and cylindrical cavities were prepared and bonded with a self-etch adhesive (AdheSe). Tetric EvoCeram Bulk Fill (TBF) was used as the filling material in all cavities. The flowable liners Tetric EvoFlow Bulk Fill (TEF) and SDR were used to line the cavity floor. In gp1-TBF, the flowable composite was not used. check details TEF was applied in a thin layer in gp2-fl/TEF + TBF and gp3-fl/TEF + TBFincremental. Two flowable composites with a layer thickness of 2mm were compared in gp4-fl/TEF + TBF and gp5-fl/SDR + TBF. TEF and SDR were mixed with radiolucent glass beads, while air bubbles inherently present in TBF served as markers. Each material application was scanned twice by micro-computed tomography before and after light curing. Scans were subjected to image segmentation for calculation of the shrinkage vectors.
The absence of a flowable liner resulted in the greatest shrinkage vectors. A thin flowable liner (gp2-fl/TEF + TBFbulk) resulted in larger overall shrinkage vectors for the whole restoration than a thick flowable liner (gp4-fl/TEF + TBF). A thin flowable liner and incremental application (gp3-fl/TEF + TBFincremental) yielded the smallest shrinkage vectors. SDR yielded slightly smaller shrinkage vectors for the whole restoration than that observed in gp4-fl/TEF + TBF.
Thick flowable liner layers had a more pronounced stress-relieving effect than thin layers regardless of the flowable liner type.
It is recommended to apply a flowable liner (thin or thick) beneath bulk-fill composites, preferably incrementally.
It is recommended to apply a flowable liner (thin or thick) beneath bulk-fill composites, preferably incrementally.
Determine the association between breastfeeding and the development of mouth breathing in children.
Seven databases were searched for studies investigating the association between the type of feeding and the development of the breathing pattern in children. Descriptive analysis and meta-analysis were performed, with the calculation of the prevalence and likelihood (odds ratios (95% CI)) of mouth breathing according to the duration of breastfeeding.
The overall prevalence of mouth breathing was 44% (95% CI 38-49) (N total = 1182). Breastfeeding was a protection factor against the development of mouth breathing (OR = 0.62; 95% CI 0.41-0.93). The likelihood of developing mouth breathing was 41% and 34% lower among children that were breastfed for more than 12 and more than 24months, respectively. No association was found between exclusive breastfeeding for up to 6 months and the occurrence of mouth breathing (OR = 0.60; 95% CI 0.31-1.18).
Due to the scarcity of cohort studies that met the inclusion criteria and the low certainty of the evidence, no strong evidence-based conclusion can be drawn. However, breastfeeding should be encouraged due to its possible protective effect, evidenced by the substantial reduction in the prevalence of mouth breathing pattern when performed for up to 2 years. Exclusive breastfeeding was not associated with the development of the breathing pattern.
The results reveal that breastfeeding can protect children from the development of mouth breathing. Thus, healthcare providers should offer support so that mothers feel prepared and encouraged to perform breastfeeding.
PROSPERO registry CRD42017062172.
PROSPERO registry CRD42017062172.
