Dental students' perceptions of the use of two-dimensional and three-dimensional vision in dental education using a three-dimensional haptic simulator: A qualitative study.

Objective: To assess the perceptions of novice and experienced undergraduate dental students of virtual learning with two-dimensional (2D) and three-dimensional (3D) vision.

Materials And Methods: This qualitative study involved 21 students from the second and fourth years of a 5-year BDS program. They first performed three operative tasks in virtual reality (VR) training sessions using both 2D and 3D vision.

The value of stereoscopic three-dimensional vision on dental students' performance in a virtual reality simulator.

Purpose/objectives: The aim of this study was to quantitatively investigate the impact of stereoscopic three-dimensional (3D) vision on students' performance when compared with that of two-dimensional (2D) vision in a 3D virtual reality (VR) simulator.

Methods: Twenty-four dental students (second- and fourth-year BDS) were assigned to perform three operative tasks under 3D and 2D viewing conditions on a Virteasy (HRV) simulator. Groups were crossed over and all students performed the same tasks under the alternate viewing conditions.

Antiangiogenic Pterocarpan and Flavonoid Constituents of .

The roots of , growing in Egypt, yielded 24 flavonoid compounds, including 17 pterocarpans, two isoflavanones, one flavanone, two isoflavans, one 2-arylbenzofuran, and an isoflava-3-ene. Nine pterocarpans have not been reported previously (-, -, , and ), and 11 are reported here for the first time from this species. Structures were established using HRESIMS, NMR, and circular dichroism techniques.

Bufadienolides and anti-angiogenic homoisoflavonoids from Rhodocodon cryptopodus, Rhodocodon rotundus and Rhodocodon cyathiformis.

Background: Homoisoflavonoids have been shown to have potent anti-proliferative activities in endothelial cells over other cell types and have demonstrated a strong antiangiogenic potential in vitro and in vivo in animal models of ocular neovascularization. Three species of Rhodocodon (Scilloideaea subfamily of the Asparagaceae family), endemic to Madagascar, R. cryptopodus, R.

Laparoscopic-assisted vaginal hysterectomy: initial experience.

We reviewed the charts of 36 women who had laparoscopic-assisted vaginal hysterectomies (LAVH) at Belfast City Hospital over a 3 year period. The average operating time was 105 minutes. However, patients had a shorter duration of hospitalization (< 4 days for 96% of patients) with rapid recuperation (3.