Objectives: This study examined the effects of stress distribution at three abutment–implant interfaces on various implant systems. Materials and Methods: Group I: tri-channel internal connection (Nobel Biocare), Group II: 1.5-mm deep internal hex (BioHorizons Co. Birmingham, USA), and Group III: ADIN Touareg, to create computerized models of implants and mandibular modeling software, close fit WP, ANSYS Version 14.0 for finite element analysis (FEA), Hypermesh 12 for meshing and CATIA were used. A top-notch scanner was used to scan the implant. CATIA software created computerized models using all the aforementioned data. By applying bonded state on the abutment–implant borders and four various load conditions within the implant system, finite element method modeling was carried out. The computerized model was imported into the ANSYS program. To compare the groups, a statistical analysis was conducted. Result: Through the use of three-dimensional FEA, the samples were assessed. Stress was found to be utmost in Group I, followed by Group III and Group II, at 80 N, 80 N with a 15° tilt, 250 N, and 250 N with a 15° tilt, and the divergence was statistically inconsequential. Conclusion: The tri-channel internal connection displayed the highest stresses compared to the internal hex within the constraints of the current study.
CoV-2 as part of a wider investigation into environmental contamination within hospital settings where COVID patients were being treated. 1 The authors reported detectable levels of virus in 7.3% of air samples. This study confirms the depth of research capability within the UK scientific community. It is unclear to us why similar investigations have not taken place in dentistry. It would be important to assess the actual risk of airborne SARS-CoV-2 transmission in dental practices. These findings may have very significant implications for the prospect of stepping-down
Frenum is a mucous membrane fold that attaches the lip and the cheek to the alveolar mucosa, gingiva, and the underlying periosteum. The frena may endanger the gingival health when they are attached closely to the gingival margin. An aberrant frenum is presupposed to create functional and aesthetic problems. Archer’s ‘classical frenectomy’ is an extensive procedure including the excision of fibers, interdental papilla, and exposure of the alveolar bone up to the palatine papilla. The aftermath delayed healing, loss of interdental papilla, and unusual scar led toward the traditional approaches such as Edward’s frenectomy, frenum relocation by Z-plasty, and free gingival graft, with their practical and esthetic restriction. A superior approach to make a primary closure in midline and to bypass anaesthetic scar by creating a zone of attached gingiva, frenectomy is associated with lateral pedicle graft. Miller, in his study on 27 subjects, proposed that newly created zone of attached gingiva may have bracing effect inhibiting reopening of diastema. A case report of this approach with its well defined benefits is presented.
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