[Robot-assisted PVP for the treatment of osteoporotic fractures of the upper thoracic vertebra].

Objective: To investigate the clinical effect of "Tianji" orthopedic robot-assisted percutaneous vertebro plasty(PVP) surgery in the treatment of upper thoracic osteoporotic fracture.

Methods: A retrospective analysis was performed on 32 patients with upper thoracic osteoporotic fracture who underwent PVP surgery in Shenzhen Hospital of Traditional Chinese Medicine from August 2016 to June 2022. There were 8 males and 24 females, ranging in age from 58 to 90 years old, with a mean of (67.

[Characterization and osteogenic activity of FSP-modified TiNbTaZr/Zn].

Purpose: To investigate whether Ti-35Nb-2Ta-3Zr/Zn (TNTZ/Zn) composite material processed by friction stir processing has osteogenic activity.

Methods: Zn was added to the surface of TNTZ alloy by friction stir processing. The control group was TNTZ(TNTZ without FSP), the experimental groups was FSP(FSP without Zn), TNTZ/Zn-0.

[Experimental evaluation of the spraying disinfection efficiency on dental models].

Purpose: To evaluate the disinfect effect after spraying a new kind of disinfectant on the dental plaster models.

Methods: The germ-free plaster samples, which were smeared with bacteria compound including Staphylococcus aureus, Escherichia coli, Saccharomyces albicans, Streptococcus mutans and Actinomyces viscosus were sprayed with disinfectants (CaviCide) and glutaraldehyde individually. In one group(5 minutes later) and another group(15 minutes later), the colonies were counted for statistical analysis after sampling, inoculating, and culturing which were used for evaluation of disinfecting efficiency.

[The effect of different retention pin on the shear force of anterior base plate].

Purpose: The purpose of this study was to compare the effect of enhancement by different shape retention nails on the anterior region resin denture base through shear strength measurements.

Methods: 24 specimens with the same size and thickness were divided into 4 groups by the shape of retention nails. Three experimental groups of the resin denture base specimen were placed a retention nail with different shape, Δtype, V type and I type.

[Fabrication and physical properties of porous individual beta-TCP scaffold to reconstruct residual alveolar ridge in dog].

Purpose: To fabricate porous individual beta-tricalcium phosphate scaffold and test its properties in dog.

Methods: A model of residual alveolar ridge in mandible of a dog was made and CT scanned after 3 months.The data of CT was transformed to 3-D format by MIMICS 7.

[Advances in research and application of beta-tricalcium phosphate, collagen and beta-tricalcium phosphate/collagen composite in bone tissue engineering].

Bone defects in oral and maxillofacial region was a common problem. To repair the defect, bone grafts including autograft, allograft and artificial bone graft were used in clinic despite of their disadvantages. Nowadays, bone tissue engineering has become a commonly used method to repair bone defect.

[Culture and characteristics of porcine dental papilla cells (pDPCs) in vitro].

Purpose: To culture porcine dental papilla cells (pDPCs) and to study the cytobiological characteristics of the cells in vitro.

Methods: Dental papillae were collected from postnatal (1-3 days) pigs, then the pDPCs were isolated and cultured through the method of enzyme-digestion. Vimentin and cytokeratin (CK) were used to demonstrate the cells' mesenchymal derivation.

[Comparison of the cytotoxicity in vitro among six types of nano-silver base inorganic antibacterial agents].

Objective: To evaluate the biocompatibility of nano-silver base inorganic antibacterial agents and compare the cytotoxicity in vitro among six types of nano-silver base inorganic antibacterial agents.

Methods: FUMAT T200-4, HN300, Novaron, Kangwang, MOD and SR1000 were diluted to different concentrations, such as 100 g/L, 50 g/L, 25 g/L and 12.5 g/L.

[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.

[In vitro study on the cytotoxicity of strontium substituted hydroxyapatite].

Objective: To evaluate the cytotoxicity of strontium substituted hydroxyapatite.

Methods: Cell Relative Growth Rate(RGR) method, MTT assay and Flow Cytometry(FCM) method were used, and the strontium substituted hydroxyapatite contained different strontium concentration(0%,1%,5%,10%,100%).

Results: It was found that there's no apparent cytotoxicity of all the strontium substituted hydroxyapatite,but the cytotoxicity increased as the strontium concentration raised.