Evaluate the effects of low-intensity pulsed ultrasound on dental implant osseointegration under type II diabetes.

The objective of this study is to assess the impact of low-intensity pulsed ultrasound (LIPUS) therapy on the peri-implant osteogenesis in a Type II diabetes mellitus (T2DM) rat model. A total of twenty male Sprague-Dawley (SD) rats were randomly allocated into four groups: Control group, T2DM group, Control-LIPUS group, and T2DM-LIPUS group. Implants were placed at the rats' bilateral maxillary first molar sites.

Antibacterial effects and microarray-based molecular mechanisms of -cinnamaldehyde against .

() is one of the keystone pathogenic bacteria of periodontitis and peri-implantitis. This study aimed to investigate the antibacterial effects and molecular mechanisms of -cinnamaldehyde (TC), a safe extract from natural plants, on . Minimum inhibitory and minimum bactericidal concentrations (MIC and MBC) of TC were determined, and scanning and transmission electron microscopies were used to assess the morphological changes.

A pilot study on the use of a novel digital real-time evaluation system in undergraduate preclinical training of tooth preparation in fixed prosthodontics.

Introduction: In the light of the digital teaching, it is necessary that the effectiveness of a new digital real-time evaluation system in the preclinical training of tooth preparation be evaluated.

Materials And Methods: Forty undergraduate dental students of the fourth year were randomly divided into the control group and the experimental group to complete the training task of tooth preparation for porcelain fused to metal (PFM) crown restoring the upper right central incisor. The control students received conventional training with instructor's guidance.

[Study on the bending strength of cast porcelain material of different linker sizes].

Purpose: To investigate the relationship between size of different connectors and bending strength of cast porcelain materials.

Methods: The samples were divided into 5 groups according to the area of all-porcelain materials and simulated connector. In group A, simulated connector with cast porcelain material with a cross-section of 2 mm×3 mm was selected; In group B, simulated connector with cast porcelain material with a cross-section of 2 mm×4 mm was selected; In group C, simulated connector with cast porcelain material with a cross-section of 3 mm×3 mm was selected; In group D, simulated connector with cast porcelain material with a cross-section of 3 mm×4 mm was selected; In group E, simulated connector with zirconium oxide material with a cross-section of 2 mm×3 mm was selected.

[Fracture resistance of endodontically treated maxillary premolars restored with different CAD/CAM all-ceramic restorations].

Purpose: This study was to evaluate the fracture resistance of endodontically treated maxillary premolars restored with different CAD/CAM all-ceramic restorations in vitro.

Methods: Mesio-occluso-function tip(MOF) cavities were prepared in 21 extracted human maxillary premolars due to endodontic treatment. The teeth were divided into 3 groups.

Alendronate delivery on amino modified mesoporous bioactive glass scaffolds to enhance bone regeneration in osteoporosis rats.

The regeneration capacity of osteoporotic bones is generally lower than that of normal bones. Nowadays, alendronate (AL) are orally administrated for osteoporosis due to the inhibition of bone resorption. However, systemic administration of AL is characterized by extremely low bioavailability and high toxicity.

Effects of lipopolysaccharides on the corrosion behavior of Ni-Cr and Co-Cr alloys.

Statement Of Problem: Lipopolysaccharides (LPS) are constituents of gingival crevicular fluid and may affect the base metal alloys used in metal ceramic crowns. The role of LPS in base metal alloys is currently unknown.

Purpose: The purpose of this in vitro study was to evaluate the effects of gram-negative bacterial LPS on the electrochemical behavior of Ni-Cr and Co-Cr alloys.

Mechanisms of stem cell osteogenic differentiation on TiO2 nanotubes.

TiO2 nanotubes could stimulate osteogenic differentiation of stem cells, but the molecular mechanisms underlying the interactions between nanotubes and stem cells remain unclear. In this study, we investigated the response of bone marrow stromal cells to nanotubes of different diameters using microarray-based bioinformatics approach. Gene ontology (GO) and GO enrichment network analysis indicated that larger TiO2 nanotubes were more potent than smaller nanotubes in inducing the expression of genes involved in cell proliferation, differentiation, and immune responses, and inhibiting that of genes responsible for cell adhesion.

[Electrochemical impedance spectroscopic study of titanium in physiological environment with blood-serum protein].

Purpose: Electrochemical impedance spectroscopy (EIS) was employed to study the corrosion behaviour of titanium in dummy environment with blood-serum protein.

Methods: EIS of titanium in PBS and cell culture fluid was acquired by advanced electrochemical system. The characteristic of EIS-Nyquist and EIS-Bode were investigated and the equivalent circuit was used to analyze the EIS results.

Fracture resistance of endodontically treated premolars restored with lithium disilicate CAD/CAM crowns or onlays and luted with two luting agents.

The purpose of the present study is to evaluate the fracture resistance of endodontically treated maxillary premolars restored using CAD/CAM onlays or crowns and luted with two types of resin cement. Forty all-ceramic crowns and twenty onlays were fabricated on maxillary premolars using the Cerec 3 system (n=10). The abutments were randomly subjected to two different procedures: Endodontic treatment was performed on forty teeth restored through a mesio-occlusal-distal (MOD) cavity preparation with composite resin fillings; twenty teeth without endodontic treatment served as control.

[Evaluation of bond strength of three resin cements on CAD/CAM ceramic-dentin].

Purpose: To evaluate the bond strength of 3 resin cements on ceramic-dentin.

Methods: Thirty sound human posterior tooth were selected for this study and the flat dentin surfaces were prepared. The specimens were divided into 3 groups(n=10) randomly, which were bonded to the CAD/CAM ceramics with RelyX ARC(etch-and-rinse adhesive), Clearfil DC Bond(self-etching resin cement) and RelyX Unicem(self-adhesive resin cement).

[The influence of heat treatment on retention force of magnetic attachments].

Purpose: To study the influence of heat treatment on retention force of magnetic attachments.

Methods: Three groups of magnetic attachments (including 10 Magfit EX 400W, 10 Magfit EX 600W, 10 Magfit EX 800W) were fixed on universal test machine respectively. The retention force of each attachment was measured.

[Corrosion resistance and wear resistance of Ni-Cr alloy after coating titanium nitride (TiN) in oral containing fluorine environment].

Purpose: The aim of this study was to evaluate the corrosion resistance and wear resistance of Ni-Cr alloy after coating titanium nitride (TiN) in oral containing fluorine environment.

Methods: Physical vapor deposition was established to coat titanium nitride (TiN) on the surface of dental cast Ni-Cr alloy to form TiN/Ni-Cr compound. Both Ni-Cr alloy and TiN/Ni-Cr compound were exposed to 37 degrees centigrade, artificial saliva containing 0.

[Microleakage of various cementing agents for casting ceramics].

Purpose: To observe and compare the microleakage of different composite resin cement systems for IPS Empress 2 ceramics base.

Methods: Sixteen healthy non-carious human molars were selected in the study. Class V ceramic inlay was prepared by IPS Empress 2 ceramics.

[The effect of tooth preparation design on the CEREC all-ceramic crown's marginal adaptation].

Purpose: To study the effect of tooth preparation on marginal adaptation of all-ceramic crown designed by the Cerec system.

Methods: Lower first molar in the standard model was prepared into four types, two occlusal convergences (6 degrees and 12 degrees ) and two marginal shapes (chamfer and shoulder), and then divided into four groups correspondingly with 8 copies of abutment preparation test piece in each group. All-ceramic crown was designed by the Cerec 3 system and inserted with corresponding test piece.

[Influence of time on shear strength using resin cements].

Purpose: To compare the shear bond strength of different composite resin cement systems at different time intervals.

Methods: 48 healthy non-carious human molars were selected in the study. The samples were divided into two groups, 24 in each group.

[Long-term observation of 920 porcelain fused to metal prostheses].

Purpose: To evaluate the long-term clinical results of porcelain fused to metal prostheses.

Methods: Since January 1995, 920 porcelain fused to metal prostheses were fabricated. The long-term outcome were evaluated according to the condition of the prosthese, abutment and the periodontal tissue in the respects of successful rate and causes of failure.

[Stress analysis of the post and core system under loading].

Purpose: To analyze the stress of the post and core system by using finite element analysis and study the influence of the "crown materials" on the analytic results.

Methods: Three groups of 3D finite element models of maxillary incisors were established according to the fabricating standard of the post and core system by using I-DEAS finite element analysis software. Group A was consisted of the cast metal post and core, the tooth structure after preparation and the periodontal structure.

[The use of computer-aided colorimeter in porcelain-fused-to-metal (PFM) crowns among patients with special colored teeth].

Purpose: To evaluate the roll of ShadeEye-NCC, a computer-aided colorimeter, in Porcelain-Fused-to-Metal crowns among patients with special colored Teeth.

Methods: The first step was to choose the proper patients. The next was to use the colorimeter to measure the base shade of tooth and fabricate the PFM crowns according to the recipe given by the colorimeter.