3D printing medical applications: diagnosis of cervical tuberculosis

Recently, Mr. Li from Xinyu City accepted the “3D printed cervical anterior bilateral pedicle screw fixation artificial vertebral body surgery” initiated by the orthopedic experts of Jiangxi Provincial People's Hospital. On the third day after surgery, he can easily stand up. activity.

Mr. Li, 42 years old, suddenly had a pain in his left shoulder and shoulders and repeated high fever in the afternoon a few months ago. After being sent to a local hospital by his family, he had not identified the pathogen because of limited medical conditions. On September 15th, Mr. Li was transferred to the Jiangxi Provincial People's Hospital. After the consultation with Mr. Li, the experts diagnosed cervical tuberculosis based on magnetic resonance and a series of patient manifestations.

"Magnetic resonance showed that the cervical vertebrae in the fifth and sixth positions were completely eroded by inflammation. At the same time, we also found that the patient's lesions progressed faster, and the intraspinal abscess has squeezed the spinal cord." According to the director of the attending physician, Dong Xieping, they considered Only 1/3 of the cervical vertebrae to the lesion have not undergone bone destruction, but they have been infiltrated by the inflammation of tuberculosis. The vertebral body, which is originally a cancellous bone, cannot provide enough grip for the screw. Therefore, the full length of the vertebral body in the fifth and sixth positions must be removed, and the intervertebral discs at both ends thereof must be removed together. The autologous bone or titanium mesh can be used to fill the defect with the autologous bone, support the lower edge of the fourth vertebral body, and Between the upper edges of the seventh vertebral body, the fourth to seventh vertebral body leading edges are fixed by steel plates, and two locking screws of about 1.5 cm length are screwed into the vertebral bodies. "The original intention of this long segment fixation is to fix the screw to a relatively solid normal vertebral body, but the steel plate with too large span is obviously not as fixed as the short segment. The longer the fixed segment, the more obvious the disadvantage." Director Dong said.

Preoperative site

Postoperative situation

Postoperative X-ray film prompts perfect fixation

Dispersant N

1. Chemical Composition:sodium methylene bis-naphthalene sulfonate
Appearance: beige brown powder
Solubility: soluble in water of any hardness
PH value: in 1% water solution, PH = 7-9
Performance: good diffusion and protective colloid, and no penetration and foaming .
Ion: anionic.
Stability: resistance to acid, alkaline, hard water, salt.

Affinity: have an affinity for protein and polyamide fibers, for cotton, hemp and other fibers no affinity.

Miscibility: may mix with anionic and non-ionizing surfactant simultaneously.

2. Specifications indicators

3. Application
Printing and dyeing industry: mainly used for dyeing vat dyes suspension, leuco acid staining, dispersion and soluble vat dyes dyeing. Also be used for silk / wool interwoven fabric dyeing, the yarn is no color. Mainly used for industrial dye dispersion and diffusion of color lakes manufacturing additives.
Building materials industry: as early strength cement water reducing agent, the amount of 0.5-1% by cement after the shock has good dispersion effect, increasing the strength of cement. Diffused N of concrete tensile strength, impermeability, frost and compressive modulus of elasticity are improved, no corrosion of steel effect.
Pesticide industry: It can be widely used in wettable pesticides, with good dispersion and solubilization, can significantly improve the efficacy, dosage according to product requirements. Example: buprofezin, the amount of 3-5 %; thiophanate amount of 0.8-1.5 %, 0.8-1 % Kai Ling vegetables.
Electroplating industry: the color is added, crossing pigment dispersants N allows uniform dispersion can significantly improve the plating surface brightness, and the amount is usually 10% of the pigment.
Rubber industry: rubber (latex) of industrial production process, the dispersed substances such as sulfur accelerator, antioxidant zinc oxide fillers ( such as barium sulfate , calcium carbonate ), etc., added to the dry weight of a dispersing agent N2-4% , 10% dispersant solution prepared in advance , and along with the other components in a ball mill grinding , can improve the dispersion effect and shorten the milling time .
Packing: 25kg bags.
Storage: two years and must be upload and download lightly.

Dispersant N,Dispersant,Dispersing Agent Nno,Dispersing Agent

Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com