Bone histomorphometry detection of autologous bone powder graft repair of partial mandibular defects in rabbits.

The aim of this study was to understand the effect of autologous bone powder graft repair of partial mandibular defects of rabbits by the quantitative detection of bone formation. New Zealand rabbits (N = 18) were selected as the test objects, and subjected to bilateral partial mandibular defect induction. One side of the mandibular defect acted as the test group, upon which the autologous bone powder backfilling graft was performed; the other side was put aside and acted as the negative control group. All used an autogenous control. At the twelfth postoperative week, the animals were sacrificed, and semi-automatic image analysis was used to conduct bone histomorphometric detection. Immediately subsequent, quantitative detection of bone formation was performed in the test group. Fluorescent perimeter percent, mineralization apposition rate, and bone formation rate were selected as the dynamic indicators; and trabecular area percent, trabecular thickness, trabecular number, and trabecular separation degree were selected as the static indicators for single factorial variance testing. It was found that the values of P are less than 0.05 between the test group and the control group, indicating that the effect of autologous bone powder graft repair on partial mandibular defects in rabbits was positive.

Cone Beam Computed Tomography in observing the presence and location of canalis sinuosus.

OBJECTIVE: Cone Beam Computed Tomography (CBCT) was used to observe and describe the distribution of canalis sinuosus (CS) in the Chinese population and the location of CS in the maxillary alveolar bone, so as to help oral surgeons evaluate the intraoperative risk and prognosis before maxillary surgery and reduce the complications caused by the injury of this structure in anterior surgery. PATIENTS AND METHODS: CBCT images of 600 patients admitted from 2021 to 2022 were collected to observe the anatomical structure of CS in the maxillary region. The following parameters were recorded: age, sex, number of CS, left and right distribution of CS, CS diameter, and location. Statistical analysis was performed on all of the collected data. RESULTS: The discovery rate of CS in this study was 59.75%, and it is commonly found in the lateral incisor area (64.82%). No significant difference can be found in the presence and number of CS in different gender and age groups (p>0.05). CONCLUSIONS: The use of high-resolution CBCT before implantation is of irreplaceable significance in the diagnosis and analysis of CS, which is conducive to reducing implantation complications and failure rate. The incidence of CS was independent of age or sex, while the location of CS was statistically significant.

Aspergillus vertebral osteomyelitis and ureteral obstruction after liver transplantation.

Aspergillus osteomyelitis has been reported as a result of dissemination in solid organ transplant recipients. Vertebral osteomyelitis is one of the most common forms of Aspergillus osteomyelitis. An Aspergillus fungal ball is a rare cause of ureteral obstruction. We describe an unusual case of simultaneous vertebral osteomyelitis and ureteral obstruction caused by A. flavus in a hepatic transplant recipient, who was successfully treated with sequential intravenous and oral itraconazole solution.

GC/MS-based metabolomic analysis of alleviated renal ischemia-reperfusion injury induced by remote ischemic preconditioning.

OBJECTIVE: Dysfunctional metabolisms have contributed towards ischemia-reperfusion (I/R) injury. However, the role of remote ischemic preconditioning (RIP) in I/R injury is not well known. The present study showed alleviated I/R injury in kidneys treated with RIP. MATERIALS AND METHODS: We utilized GC/MS-based metabolomics to characterize the variation of metabolomes. RESULTS: Metabolic category using differential metabolites showed the lower percentage of amino acids in I/R group in comparison to RIP+I/R group, confirming the importance of amino acid metabolism in RIP-treated rat kidney. Further, pathway enrichment analysis showed alanine, aspartate and glutamate metabolism to be involved in the beneficial effects of RIP during renal I/R injury. Furthermore, another crucial enrichment pathway is biosynthesis of unsaturated fatty acids. Other vital metabolites detected in independent component analysis (ICA) analysis were d-glucose, lactic acid and cholesterol. The variation tendency of above-mentioned metabolites was overall consistent with the protective nature of RIP. CONCLUSIONS: These findings elicited a viewpoint that metabolic strategy affected by RIP are linked to underlying mechanisms of RIP and highlighted the importance of metabolic strategy against I/R injury.

Nimotuzumab with cisplatin or fluorouracil on human esophageal squamous cell carcinoma EC1 cells.

OBJECTIVE: To investigate the effects of nimotuzumab (h-R3) with cisplatin (DDP) or fluorouracil (5-FU) on human esophageal squamous cell carcinoma (ESCC) EC1 cells. MATERIALS AND METHODS: The assignment included blank control, h-R3 alone, DDP alone, 5-FU alone, h-R3 combined with DDP, and h-R3 combined with 5-FU. The cell proliferation in each group was measured by MMT method 48 h post dose. The effect on the cell cycle was determined by flow cytometry, and the effect on cell apoptosis was determined by flow cytometry and TUNEL test 48 h post dose. RESULTS: The inhibitory effect of h-R3 on the proliferation of EC1 cells was weak. The maximum inhibition rate was 10.10 ± 0.58% 48 h post dose, and the difference in the inhibition rate between the h-R3 with chemotherapeutic agents and the chemotherapeutic agent alone was not statistically significant (p > 0.05). Flow cytometry demonstrated no obvious change in the EC1 cells after h-R3 treatment (p > 0.05). Flow cytometry and TUNEL test demonstrated that the difference in the apoptosis rate between h-R3 combined with chemotherapeutic agents and blank control was not statistically significant (p > 0.05). CONCLUSIONS: h-R3 had no significant effect on human ESCC EC1 cells in vitro, with or without the combination of chemotherapeutic agents.