Method 300: a complementary teaching methodology in Dentistry
This study evaluated Method 300, a complementary teaching methodology in Dentistry. Thirty participants were divided into 6 groups according to the scores obtained in a placement test ranging from 0 to 10. Students with scores lower than 6 were classified as having poor academic performance; students with scores equal to or greater than 6 were considered as having good academic performance. Each group included at least one student with good performance. Our methodology consisted of two application cycles, each including one different test; however, only students with low performance could undergo the second testing. Studen...
Source: Odontology - October 28, 2021 Category: Dentistry Source Type: research
Marginal fit of 3-unit CAD –CAM zirconia frameworks fabricated using cone beam computed tomography scans: an experimental study
AbstractWhether cone beam computed tomography (CBCT) scans can be used for the fabrication of computer-aided design and computer-aided manufacturing (CAD –CAM) fixed dental prostheses (FDPs) is not known. The purpose of the present study was to compare the marginal fit of 3-unit zirconia FDPs fabricated by using CBCT or 3-dimensional (3D) laboratory scanning. Extracted second premolar and molar teeth in a maxillary typodont model were prepared. The first molar was removed and the typodont model was scanned with a laboratory or a CBCT scanner to generate two virtual 3D cast groups (3DL and CBCT). Forty four 3-unit zirconi...
Source: Odontology - October 19, 2021 Category: Dentistry Source Type: research
Correction to: Evaluation of low-viscosity bulk-fill composites regarding marginal and internal adaptation
(Source: Odontology)
Source: Odontology - October 19, 2021 Category: Dentistry Source Type: research
Synergistic effect of thymoquinone and nystatin in the treatment of oral candidiasis; an in vitro study
AbstractThe effectiveness of antifungal agents may be insufficient against resistant strains in some cases of oral candidiasis. The aim of this study was to evaluate the antifungal effect of thymoquinone againstCandidaalbicans,Candidatropicalis,Candidaglabrata andCandidakrusei strains and the synergistic antifungal activity of these strains in combination with nystatin. To evaluate in vitro antifungal activity and interactions between thymoquinone and nystatin, substances were tested againstCandidaalbicans ATCC 10,231,C.tropicalis ATCC 750,C.krusei ATCC 6258 andC.glabrata ATCC 2001 standard strains both individually and co...
Source: Odontology - October 17, 2021 Category: Dentistry Source Type: research
The effect of functionalized titanium dioxide nanotube reinforcement on the water sorption and water solubility properties of flowable bulk-fill composite resins
AbstractThe aim of this study was to investigate the effects of titanium dioxide nanotube addition on the water sorption and water solubility values of different composite resins. Titanium dioxide nanotubes were synthesized from titanium dioxide powder in anatase form and in 13 nm diameter by hydrothermal process and then functionalized with methacrylic acid. Characterization of the nanotubes was performed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy. A flowable composite resin (Filte k Ultimate Flowable) and four flowable bulk-fill c...
Source: Odontology - October 13, 2021 Category: Dentistry Source Type: research
Association between root taper and root proximity of single-rooted teeth with periodontitis: a cone-beam computed tomography based study
This study aimed to determine the association between the root taper and proximity of single-rooted teeth with periodontitis using cone-beam computed tomography (CBCT). CBCT images of 362 single-rooted teeth from 37 patients were evaluated. This case –control study analyzed 17 participants with stage II and III periodontitis, (n = 161 teeth, periodontitis group) and 20 participants with healthy periodontium (n = 201 teeth, control group). Multiplanar reconstructions were used for proximity measurements, and cross-sectional images for calculating the angle of the root tapers. Root proximity, root length, and root ...
Source: Odontology - October 12, 2021 Category: Dentistry Source Type: research
Virucidal efficacy of chlorhexidine: a systematic review
This study aimed to systematically review the literature about the virucidal efficacy of CHX in comparison to other substances used in the oral cavity. Electronic searches were performed in four databases (PubMed, Scopus, Embase, and Web of Science). Only studies that presented the following characteristics were included: (1) verified virucidal efficacy of CHX against Herpes Simplex Type-1 (HSV-1), any Influenza, or any human coronavirus (HcoV); and (2) compared the virucidal efficacy of CHX with essential oils (Listerine®), quaternary ammonium compounds, povidone-iodine, hydrogen peroxide, negative control substance, and...
Source: Odontology - October 12, 2021 Category: Dentistry Source Type: research
Is pulpotomy a promising modality in treating permanent teeth? An umbrella review
AbstractEmerging evidence suggests the use of less invasive therapy such as pulpotomy in treating permanent teeth with pulp exposure and signs of pulpitis. Hence, this umbrella review aims to evaluate the available systematic reviews on pulpotomy treated permanent teeth. Articles published between January 1970 and May 2021 were searched in ten electronic databases and five textbooks. Only systematic reviews published in English that examined the use of pulpotomy on either carious or traumatic pulpal exposed in mature or immature permanent teeth with signs of pulpitis were selected. The Corrected Covered Areas (CCAs) were c...
Source: Odontology - October 11, 2021 Category: Dentistry Source Type: research
The optimal activation of plastic aligner for canine distal movement: a three-dimensional finite element analysis
This study aimed to investigate the optimal activation of plastic aligner for the canine distal movement by combining the stress and strain of periodontal ligament. Computer-aided design models of the upper canine, periodontal ligament, alveolar bone, and plastic aligner were constructed. The stresses and strains of periodontal ligament were acquired by fitting plastic aligner on the canine, which will cause the canine distal-direction movement. The activation of plastic aligner was set into 12 groups, including 0.050, 0.100, 0.125, 0.150, 0.175, 0.200, 0.225, 0.250, 0.275, 0.300, 0.350, and 0.400 mm. Assuming the volume...
Source: Odontology - October 9, 2021 Category: Dentistry Source Type: research
Cell viability of novel composite hydrogels loaded with hydroxyapatite for oral and maxillofacial bone regeneration
AbstractThe development of hydrogels for maxillofacial bone regeneration holds vast potential. However, some challenges need to be addressed to further their application in clinical settings. One challenge is optimizing cell viability. To improve mechanical strength, various materials have been investigated; however, incorporation of these materials within the hydrogel network may affect cell viability. The purpose of this study was to evaluate the cell viability of novel gelatin-alginate composite hydrogels loaded with hydroxyapatite (HA) and nano-hydroxyapatite (n-HA) for maxillofacial bone regeneration. Nine different h...
Source: Odontology - October 8, 2021 Category: Dentistry Source Type: research
Effect of the incorporation of hydroxyapatite on the diametral tensile strength of conventional and hybrid glass ionomer cements
The objective was to evaluate the effect of the incorporation of calcium hydroxyapatite particles (HAp) in the diametral tensile strength of a conventional type II glass ionomer (GC Gold Label 2) and a resin-modified glass ionomer cement (GC Gold Label 2 LC R). Two experimental HAp (E1HAp or E2HAp) were synthesized and characterized using X-ray diffraction and Confocal Raman spectroscopy. Both HAp were added into the powder of a conventional or resin-modified glass ionomer cement at 5 or 10 wt.%. A commercial HAp (CHAp) was used as reference material. For each glass ionomer cement, a group without the incorporation of HAp ...
Source: Odontology - August 26, 2021 Category: Dentistry Source Type: research
Factors influencing implant and prosthesis survival in zygomatic implant-supported fixed rehabilitation: a retrospective study
ConclusionsZygomatic implant rehabilitation demonstrated to be a reliable method with good mid-term results. The occurrence of post-surgical adverse events and need for laboratory repair of the prosthesis were found to be significant risk factors for implant loss. Previous implant loss was significantly associated with prosthesis loss. These risk factors may be prevented by means of detailed planning of the rehabilitation to be carried out, including post-operative care of the patients, so that treatment success using zygomatic implants can be achieved. (Source: Odontology)
Source: Odontology - August 26, 2021 Category: Dentistry Source Type: research
BMP4-regulated human dental pulp stromal cells promote pulp-like tissue regeneration in a decellularized dental pulp matrix scaffold
AbstractPulp regeneration with stem cells is a promising alternative for treating periapical and pulp diseases of young permanent teeth. The aim of this study was to characterize decellularized dental pulp extracellular matrix (dECM) and investigate whether bone morphogenetic protein 4 (BMP4) regulates dental pulp stromal cells (DPSC)-mediated pulp regeneration combined with dECM. Dental pulp isolated from healthy third molars was decellularized with 10% sodium dodecyl sulfate (SDS) and Triton X-100. H&E staining, DAPI staining and electron microscopy were used to observe the dECM structure. The Cell Counting Kit-8 ass...
Source: Odontology - August 26, 2021 Category: Dentistry Source Type: research
Targeting hepatocyte growth factor in epithelial –stromal interactions in an in vitro experimental model of human periodontitis
AbstractPeriodontitis is a chronic inflammatory disease leading to progressive connective tissue degradation and loss of the tooth-supporting bone. Clinical and experimental studies suggest that hepatocyte growth factor (HGF) is involved in the dysregulated fibroblast –epithelial cell interactions in periodontitis. The aim of this study was to explore effects of HGF to impact fibroblast-induced collagen degradation. A patient-derived experimental cell culture model of periodontitis was applied. Primary human epithelial cells and fibroblasts isolated from period ontitis-affected gingiva were co-cultured in a three-dimensi...
Source: Odontology - August 26, 2021 Category: Dentistry Source Type: research
Porphyromonas gingivalis outside the oral cavity
AbstractPorphyromonas gingivalis, a Gram-negative anaerobic bacillus present in periodontal disease, is considered one of the major pathogens in periodontitis. A literature search for English original studies, case series and review articles published up to December 2019 was performed using the MEDLINE, PubMed and GoogleScholar databases, with the search terms “Porphyromonas gingivalis” AND the potentially associated condition or systemic disease Abstracts and full text articles were used to make a review of published research literature onP. gingivalis outside the oral cavity. The main points of interest of this narra...
Source: Odontology - August 19, 2021 Category: Dentistry Source Type: research
