Quantitative evaluation of proximal contacts in Class 2 composite resin restorations : a clinical study : a thesis submitted in partial fulfillment ... restorative dentistry, operative ... / by Jen-Chyan Wang.

ii, 93 leaves.http://babel.hathitrust.org/cgi/pt?id=mdp.39015009882070;view=2up;ui=fullscreen#page/n0/mode/2uphttp://babel.hathitrust.org/cgi/pt?id=mdp.39015009882237;view=2up;ui=fullscreen#page/n0/mode/2u

Augmented reality (AR) and virtual reality (VR) applied in dentistry

The OSCE is a reliable evaluation method to estimate the preclinical examination of dental students. The most ideal assessment for OSCE is used the augmented reality simulator to evaluate. This literature review investigated a recently developed in virtual reality (VR) and augmented reality (AR) starting of the dental history to the progress of the dental skill. As result of the lacking of technology, it needs to depend on other device increasing the success rate and decreasing the risk of the surgery. The development of tracking unit changed the surgical and educational way. Clinical surgery is based on mature education. VR and AR simultaneously affected the skill of the training lesson and navigation system. Widely, the VR and AR not only applied in the dental training lesson and surgery, but also improved all field in our life. Keywords: OSCE, Dental simulator, Augmented reality, Virtual reality, Dentistr

Multiple solutions for 2mth order Sturm-Liouville boundary value problems

[[abstract]]Growth conditions are imposed on f such that the following boundary value problem: (−1)my(2m) = f(t, y), αi+1y(2i)(0) − βi+1y(2i+1)(0) = γi+1y(2i)(1) + δi+1y(2i+1)(1) = 0, 0 ≤ i ≤ m−1, has an arbitrary number of positive solutions.[[notice]]補正完畢[[journaltype]]國

Biodegradable Hydrogel Beads Combined with Calcium Phosphate Bone Cement for Bone Repair: In Vitro and In Vivo Characterization

This study evaluated the in vitro characterizations of biodegradable hydrogel beads with calcium phosphate bone cement (CPC). Commercial fast-setting CPC and hydrogel beads were compared with 25%-volume hydrogel in CPC (C/0.25) in vivo. The histological behaviors and absorption rates of CPC only, hydrogel beads, and hydrogel/CPC composite were measured and compared at 4, 8, and 12 weeks. The results indicated that the C/0.25 composite can be molded and does not disintegrate when immersed in the solution, but this delays the phase transition of the CPC into the product in the early reaction process. The osteoprogenitor D1 cell affinity of the C/0.25 composite was equally competitive with that of the CPC-only. Adding hydrogel beads to CPC did not inhibit cell proliferation as well as differentiation of osteoprogenitor cells. In vivo histological evaluations did not indicate any significant difference in the CPC-only, hydrogel-only, and C/0.25 composite after 4 weeks of implantation; however, significantly less residue was observed in the C/0.25 composite relative to the CPC-only after 8 weeks. After 12 weeks of hydrogel beads implantation, the hydrogel degraded substantially, creating vacancies that were subsequently occupied by a large amount of soft tissue. New bone was formed in large quantities in the C/0.25; therefore, the C/0.25 composite is a promising option for a wide range of dental, craniofacial, and orthopedic applications

Nonlinear two-point boundary value problems on time scales

100學年度研究獎補助論文[[abstract]]This work gives a criterion for the existence of positive solutions for nonlinear second order ordinary differential equations with two-point boundary conditions on time scales. Moreover, for some source terms which are in the sense of sublinear or superlinear, we also formulate corollaries and examples for applications and we improve previous results related with the first eigenvalue discussed by Professor Li.[[incitationindex]]SCI[[booktype]]紙

Comparison of Two Heat-pressed All-ceramic Crown Systems

There is increasing demand for all-ceramic crowns to improve esthetics and avoid the intraoral use of metal. There are several ways to fabricate all-ceramic prostheses. The heat-press method is easily handled, creates less porosity than the conventional powder slurry method, produces consistent quality, and avoids firing shrinkage. Each of the popular brands of heat-press ceramics has its own heat-press furnace. The purposes of this study were to determine whether it was possible to use one heat-press furnace to make different all-ceramic prostheses, and to compare the fit and hardness of two commercial heat-press all-ceramic systems made using the staining technique. Ceramic ingots were analyzed by X-ray diffraction analysis before heat press. Finesse® All-Ceramic and OPC 3G® specimens were both heat-pressed using a porcelain pressing furnace designed for Finesse®. Mesio-occluso-distal inlays were cemented to the metal die with temporary cement. Marginal accuracy was measured using a three-dimensional coordinate measuring machine. Vickers hardness was measured using a microhardness tester. X-ray diffraction analysis of the ceramic ingots showed that the main peak position for Finesse® was leucite (KAlSi2O6) and for OPC 3G® was lithium disilicate (Li2Si2O5). The marginal gap for Finesse® was statistically lower than that for OPC 3G® (62.5 ± 15.5 vs 99.4 ± 11.6 mm; p 0.05). The marginal gaps for Finesse® and OPC 3G® were clinically acceptable. Therefore, it is possible to use one heat-press furnace to cast different all-ceramic systems