Villumsenhartvigsen8232
Laser etching addresses the disadvantages of conventional acid etching technique, such as enamel decalcification and formation of white spot lesions. The aim of the present study was to evaluate and compare the shear bond strength (SBS), adhesive remnant index (ARI), and the surface characteristics of the samples treated with conventional acid etching and Er, Cr YSGG laser etching with variable output power and time durations.
The study sample included 78 extracted teeth divided into six groups of 13 teeth each, and 3 samples from each group were utilized for analyzing etch patterns, and the remaining 10 teeth from each group were used for evaluating the shear bond strength. In Group I phosphoric acid etching was done, whereas in Group II- VI Laser etching 1.5 W/10 s, 1.5 W/15 s, 3 W/5 s, 3 W/10 s, 3 W/15 s. Statistical analysis for shear bond strength testing was performed using one-way ANOVA followed by Post HOC tests.
The mean shear bond strength of Group I was 7.16 Mpa and Group III of 5.43 Mpa. Group II, IV, V, and VI had mean shear bond strength of 4.93 Mpa, 3.88 Mpa, 4.05 Mpa, and 4.88 Mpa, respectively. The ARI scores Group I had a significant number of samples with scores 2 other groups showed increased Score 0. The etch pattern of groups I, II, III showed the combined dissolution of both prism cores, and peripheries were seen. In group IV, the etching pattern was irregular with the pitted type of surface. In groups V and VI, relatively flat and smooth enamel surface was seen.
The bond strength attained by laser etching (1.5 W/10 s and 1.5 W/15 s) was comparable to that obtained by the acid etching technique.
The bond strength attained by laser etching (1.5 W/10 s and 1.5 W/15 s) was comparable to that obtained by the acid etching technique.
The main objective of this study is to get a wider and clearer idea about the relationship between sella turcica bridging and the type of dental anomalies related to size, shape, number, structure and eruption of teeth.
For the present study, 50 pretreatment lateral cephalometric radiographs showing complete sella turcica bridging were retrieved from the 500 existing case records of patients. The control group consisted of 50 pretreatment lateral cephalograms without sella turcica bridging retrieved from the same case records by using simple random sampling. After collection of the samples, retrospective study was performed with the analysis of patient records to assess any associated dental anomaly in patients with sella turcica bridging and patients without sella turcica bridging. Shafer's classification of morphological variations in size, shape, structure, number and eruption of teeth was used to analyze and group the dental anomalies.
The incidence of dental anomalies related to number and size of teeth was found to be higher in cases with sella turcica bridging.
Lateral cephalogram is used by orthodontist routinely for diagnosis and treatment planning; it can be used as a prediction tool for dental anomalies as well. Early detection of skeletal anomalies can be used to forecast the presence of dental anomalies later in life, which will help the clinician to adopt preventive measures.
Lateral cephalogram is used by orthodontist routinely for diagnosis and treatment planning; it can be used as a prediction tool for dental anomalies as well. Early detection of skeletal anomalies can be used to forecast the presence of dental anomalies later in life, which will help the clinician to adopt preventive measures.
Orthodontic miniscrew implants (OMIs) are widely used as anchorage alternatives, but recent studies revealed the corrosion behavior of OMIs when they come in contact with mouthwashes. The corrosion materials that are released can cause toxicity, allergy, and mutagenicity.
This study aims to analyze the cytotoxicity effects of OMIs exposed to different types of mouthwash using human gingival fibroblast (HGFs).
Experimental laboratory research.
Twenty-eight samples of Ti alloy OMIs immersed separately in four groups of different types of mouthwash (chlorhexidine gluconate 0.2% mouthwash (CHX), fluoridated (sodium fluoride 0.2%) mouthwash, chitosan mouthwash 1.5%, and aquadest) for 28 d. Elution of each group and the mouthwash itself were added to the cell culture and incubated for 24 h. Changes in cell viability were performed by MTT Assay.
Data were tested for normality with Shapiro-Wilk, homogeneity with Levene test, and analyzed using an independent T-test (
< 0.05).
The differences between the cytotoxicity of the elution of MIO and the mouthwash solution itself in the group of CHX and Fluoride were statistically significant (
< 0.05). No significant differences were found in the group of chitosan and aquadest (
> 0.05).
The 1.5% chitosan mouthwash can be offered to patients with Ti alloy-based OMIs rather than the 0.2% chlorhexidine gluconate and 0.2% sodium fluoride mouthwashes.
The 1.5% chitosan mouthwash can be offered to patients with Ti alloy-based OMIs rather than the 0.2% chlorhexidine gluconate and 0.2% sodium fluoride mouthwashes.Teledentistry has proven effective in practically all dental fields. It also allows access to inaccessible and underdeveloped locations. Better treatment outcomes were documented in patients treated by an orthodontist supervised by teledentistry than by a general dentist with minimal orthodontic experience alone. It may also help to focus referrals to specialists and weed out those who do not need them. But, on a critical note, a doctor-patient relationship is much more than a business transaction. A face-to-face initial consultation instills trust that a remote session cannot. Teledentistry includes professional networking of doctors. This contact includes digital information exchange, CPD programs, case discussions, and analysis that bring dentists from all around the world together to improve patient care. Teledentistry has not only spanned the distance between dentists worldwide, but has also served as a conduit between customer (patient) and manufacturer. This spawned Direct to Consumer (DTC) dentistry, of cosmetics? Is teledentistry making us less connected with our patients?
To assess the impact of enamel surface treatment protocols and the types of adhesive materials on the shear bond strength (SBS) of brackets to eroded enamel substrate.
Eighty extracted premolars were randomly assigned to four main groups in which group C (no treatment) was the control group. The remaining groups were exposed to an erosion challenge through short-term acidic exposure to HCl solution (0.01 M, pH 2.3) for 30 s, with an agitation speed of 50 rpm at an environmental temperature of 25°C. The eroded enamel surface within each group was treated as follows group N received no treatment; in group P, the eroded enamel was treated with 35% phosphoric acid (Ultradent Products, South Jordan, UT, USA) for 15 s, followed by a rinse for 10 s; and in group F, the eroded enamel was treated with fluoride gel (Bifluorid 12; Voco-GmbH, Cuxhaven, Germany) for 4 min. The brackets were bonded with either a resin composite adhesive (Transbond XT; light-cure adhesive, 3M Unitek, CA, USA) or resin-modified glass ionth the other treated groups. The use of fluoride-releasing adhesive also enhances bonding to the eroded enamel surfaces.
Fluoride pretreatment, which was used to remineralize the eroded enamel surfaces before bonding, resulted in a decrease in the SBS of the orthodontic brackets in vitro compared with the other treated groups. The use of fluoride-releasing adhesive also enhances bonding to the eroded enamel surfaces.
Thalassemia, one of the most widespread autosomal recessive disorders, is characterized by anomalies in the synthesis of hemoglobin beta chains and is frequently coupled with variable craniofacial characteristics. Thalassemic patients suffer from severe anemia, which triggers several defense mechanisms in the body, such as bone marrow expansion, which forces the bones to expand, resulting in craniofacial bone deformities. This study aims to assess and compare the orofacial dimensions of β-thalassemia patients with those of a control group across similar ages and gender.
Three hundred Iraqi individuals agreed to participate in this study (150 non-thalassemic and 150 thalassemic patients with an equal distribution of genders). A well-trained researcher carried out five anthropometric measurements by using an electronic digital caliper. Gender and group differences were tested using an independent sample t test.
Mouth width showed clinical and statistically significant group differences among all measurements in the study group.
All measurements except mouth width showed nonsignificant clinical group differences.
All measurements except mouth width showed nonsignificant clinical group differences.
This work describes the phytochemical and biological investigation of aerial parts of
Hochst. Of Saudi origin.
Petroleum ether fraction of ethanolic extract
was fractionated on a silica gel column and further purified with different chromatographic procedures for the isolation of chemical compounds. The chemical structures of all the pure isolated compounds were elucidated by the interpretation of their spectral data using IR, UV,
H,
C NMR, and MS spectroscopy and chemical methods (alkaline hydrolysis) as well as comparison with data reported in the literature. The extract and isolated compounds were evaluated for antioxidant, cholinesterase inhibitory, and antimicrobial activities.
A new oleanane-type triterpene ester, namely abubidentin A (
) (α, 3β, 30-trihydroxy-29-carboxy-olean-9(11), 12-diene-3-dotriacontanoate), along with two known compounds 2-hydroxydocosanoic acid (
) and stigmasta-22-ene-3-β-ol (
) were isolated from the aerial parts of
Hochst. (Malvaceae). Concerning the biological potential, the abubidentinA displayed antioxidant, cholinesterase inhibitory and antimicrobial activities. AbubidentinA possessed strong antioxidant activity against DPPH and ABTS
radical scavenging assays. This new triterpene exhibited high inhibition against acetylcholinesterase (IC
38.13 ± 0.07 µgmL
) and butyrylcholinesterase (IC
32.68 ± 0.37 µgmL
). Abubidentin A displayed promising antimicrobial activity against
,
, and
(125-150 µgmL
).
These findings suggest
can contribute as a source of new biologically active compounds, especially antioxidants and antimicrobial agents.
These findings suggest A. bidentatum can contribute as a source of new biologically active compounds, especially antioxidants and antimicrobial agents.
Although studies have shown that Bacteroidetes, Clostridiales, and Lactobacillales are the main components of the microbial community in pit mud during the brewing of Luzhou-flavored liquor, little is known about the effect of brewing materials on spatial structures of this microbiome.
High-throughput sequencing of the V4-V5 region of prokaryotic 16S rRNA gene was performed to analyze the microbial community diversity and spatial heterogeneity in Luzhou-flavored liquor pit muds with different brewing ingredients. The structural characteristics and heterogeneous spatial distribution of the pit mud microbial communities were examined using bioinformatics and multivariate statistical analysis methods.
Our results showed that Euryarchaeota, Actinobacteria, Bacteroidetes, Chlorobi, Chloroflexi, Firmicutes, Proteobacteria, Synergistetes, Tenericutes, and WWE1 were the dominant phyla in the pit mud microbiome. The Shannon and Simpson indices of the pit mud microbiome with three grains (M3G) in the upper layer were significantly lower than those in middle layer and bottom, whereas those of the pit mud microbiome with five grains (M5G) in bottom were significantly lower than those in middle layer (
< 0.
