The goal of this study was to evaluate the distribution of stresses generated around implants with different internal-cone abutments by photoelastic (PA) and finite element analysis (FEA). For FEA, implant and abutments with different internal-cone connections (H- hexagonal and S- solid) were scanned, 3D meshes were modeled and objects were loaded with computer software. Trabecular and cortical bones and photoelastic resin blocks were simulated. The PA was performed with photoelastic resin blocks where implants were included and different abutments were bolted. Specimens were observed in the circular polariscope with the application device attached, where loads were applied on same conditions as FEA. FEA images showed very similar stress distribution between two models with different abutments. Differences were observed between stress distribution in bone and resin blocks; PA images resembled those obtained on resin block FEA. PA images were also quantitatively analyzed by comparing the values assigned to fringes. It was observed that S abutment distributes loads more evenly to bone adjacent to an implant when compared to H abutment, for both analysis methods used. It was observed that the PA has generated very similar results to those obtained in FEA with the resin block.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1563/AAID-JOI-D-12-00260 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Overexpression of AtbZIP69 in transgenic wheat confers tolerance to nitrogen and drought stress.
Planta
January 2025
State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China.
AtbZIP69 overexpression in wheat significantly enhanced drought and low nitrogen tolerance by modulating ABA synthesis, antioxidant activity, nitrogen allocation, and transporter gene expression, boosting yield. In this study, we generated wheat plants with improved low nitrogen (LN) and drought tolerance by introducing AtbZIP69, a gene encoding a basic leucine zipper domain transcription factor, into the wheat cultivar Shi 4056. AtbZIP69 localized to the nucleus and activated transcription.
View Article and Find Full Text PDFFinite element analysis of the influence of perioral force on alveolar ridge healing in areas missing maxillary anterior teeth.
BMC Oral Health
January 2025
Department of Dental Implantology, Jinan Stomatological Hospital, Jinan, 250002, Shandong, People's Republic of China.
Objective: To study the biomechanical changes induced by differences in perioral force in patients with missing anterior maxillary teeth at rest via finite element analysis (FEA).
Methods: Using conical beam CT (CBCT) images of a healthy person, models of the complete maxillary anterior dental region (Model A) and maxillary anterior dental region with a missing left maxillary central incisor (Model B) were constructed. The labial and palatine alveolar bone and tooth surface of the bilateral incisor and cusp regions were selected as the application sites, the resting perioral force was applied perpendicular to the tissue surface, and the changes in maxillary stress and displacement after the perioral force was simulated were analyzed.
Exploring the Molecular Mechanisms of Fisetin in Treating Periodontitis Through Multiomics and Network Pharmacology.
Int Dent J
January 2025
Affiliated Stomatology Hospital of Kunming Medical University, Kunming, China; Yunnan Key Laboratory of Stomatology, Kunming, China. Electronic address:
Background: Periodontitis (PD) is a common chronic inflammatory oral disease that severely affects patients' quality of life. Fisetin has been shown to possess antioxidant and anti-inflammatory properties in various biological systems.
Methods: This study first identified the molecular targets of fisetin for PD through network pharmacology analysis.
Two types of cannulated screw fixation based on Letenneur classification for the treatment of Hoffa fracture: A finite element analysis.
J Orthop Sci
January 2025
Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, China. Electronic address:
Purpose: A finite element analysis was performed to simulate the biomechanical differences between anterior-posterior (AP) direction and posterior-anterior (PA) direction placement of two cannulated screws in Hoffa fractures.
Methods: Computed tomography images of an healthy male volunteer were used to simulate Letenneur Ⅰ, Ⅱa, Ⅱb, Ⅱc, Ⅲ Hoffa fractures, and two groups of screw internal fixation models were constructed. Two 6.
Color Change and Cytotoxic Effects of a Bleaching Gel With 22% Carbamide Peroxide Catalyzed by Manganese Oxide.
J Esthet Restor Dent
January 2025
Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil.
Objectives: To evaluate the color change and trans-amelodentinal cytotoxicity of a 22% carbamide peroxide (CP) bleaching gel containing different concentration of manganese oxide (MnO).
Material And Methods: Enamel/dentin discs adapted to artificial pulp chambers were distributed according to treatments: CN-No treatment; CP22%-22%CP; CP22 + 2MnO-22%CP + 2 mg/mLMnO; CP22% + 6MnO-22%CP + 6 mg/mLMnO; CP22% + 10MnO-22%CP + 10 mg/mLMnO applied for 2 h for 15 days. Color change-CC (ΔE and ΔWI) (n = 8) was determined at 5, 10, and 15-day periods (ANOVA/Sidak).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!