上海口腔医学最新文献

Purpose: The characteristics of saliva and intestinal microbial community in children with high caries and no caries were analyzed by 16S rDNA high-throughput sequencing.

Methods: Among 431 children aged 3-5 years old in Zunyi City who were investigated previously by our team, 25 children in the high caries group and the same in the caries-free group were selected for fecal and saliva samples. 16S rDNA high-throughput sequencing was used to analyze the bacterial flora structure of the samples and identify the species with different relative abundance at the species level. SPSS 18.0 software package was used for data analysis.

Results: The diversity of intestinal flora in the high caries group was higher than that in the caries-free group, and the difference was statistically significant(P＜0.05). The diversity of salivary flora in the high caries group was more than that in the caries-free group, with no significant difference(P＞0.05). At phylum level,there was no significant difference in intestinal and salivary flora between children with high caries and children without caries. At gene level, Blautia, [Eubacterium] hallii group and [Eubacterium] eligens group in the intestine of caries-free group were significantly higher than those of high caries group(P＜0.05), while Parasutterella and Christensenellaceae R-7 group were significantly lower than those of high caries group(P＜0.05). At gene level, Peptostreptococcus in saliva of caries-free group was significantly higher than that in high caries group(P＜0.05). Dialister, Kingella, Escherichia-Shigella and Treponema in saliva of caries-free group were significantly lower than those in high caries group(P＜0.05).

Conclusions: There are significant differences in species composition of intestinal flora but no in salivary flora between children with high caries and children without caries.

Purpose: To investigate the relationship between preoperative systemic immune-inflammation index (SII) and relapse-free survival (RFS) after surgical resection of mucoepidermoid carcinoma(MEC).

Methods: The data of 135 patients with MEC who underwent surgical resection in the First Affiliated Hospital of Zhengzhou University from January 2016 to July 2019 were collected, and the receiver operating characteristic(ROC) curve was performed on the SII of patients. The optimal cut-off value was obtained by ROC analysis. Therefore, the patients' SII index was divided into high and low group, and survival analysis was performed by Kaplan-Meier method. Cox proportional regression model and least absolute shrinkage and selection operator (LASSO) were used to analyze the factors influencing prognosis, and a nomogram model was built to predict patients' relapse-free survival(RFS). Area under curve (AUC) and correction curve were used to evaluate the model and verify the consistency.

Results: Survival analysis showed that the RFS rate in low SII group was significantly higher than that in high SII group. Cox proportional hazard regression model showed high SII(HR=2.179, 95%CI: 1.072-4.426, P=0.031) and low tumor differentiation(HR=6.894, 95%CI: 2.770-17.158, P=0.000) and cervical lymph node metastasis (HR=2.091, 95%CI: 1.034-4.230, P=0.040) were significant predictors of poor RFS.

Conclusions: The lower the preoperative SII, the better the prognosis of patients. The nomogram prognosis of MEC based on SII is effective.

Purpose: To investigate the therapeutic effect of atorvastatin on alveolar bone defect model in rats, and to observe the effect of atorvastatin on Wnt/β-catenin.

Methods: Thirty rats were randomly divided into normal group (group N), model group (group M) and atorvastatin administration group (group ATV). Except group N, bone defects were made in other rats' alveolar bone to construct alveolar bone defect model. After successful modeling, 20 mg/kg atorvastatin suspension was administered by gavage in group ATV, and the same amount of sodium carboxymethyl cellulose solution was administered by gavage in group N and group M for twenty-one days. After the last administration, tail vein blood was collected to detect the concentrations of serum osteoprotegerin (OPG), alkaline phosphatase (ALP) and osteocalcin (BPG). H-E staining was used to observe the pathological changes of maxillary defect area, and lane Sandhu score was performed. Tartrate resistant acid phosphatase(TRAP) staining was used to detect the number of osteoclasts in the defect area. Real time fluorescence quantitative PCR(RT-qPCR) and Western blot(WB) were used to detect Wnt, β-catenin and Runx2 mRNA protein expression. Statistical analysis was performed with SPSS 23.0 software package.

Results: Compared with group N, the concentrations of OPG, ALP, BGP and Lane Sandhu score in group M decreased, and the number of osteoclasts increased. Compared with group M, the concentrations of OPG, ALP and BGP and lane Sandhu score in group ATV increased, and the number of osteoclasts decreased. After H-E staining, the amount of bone formation in maxillary defect area in group N was more,there was fewer bone tissues in the defect area in group M, the amount of bone tissues in the defect area increased in group ATV. Compared with group N, Wnt, β-catenin and Runx2 mRNA protein decreased. Compared with group M, Wnt, β-catenin and Runx2 mRNA protein expression increased.

Conclusions: Atorvastatin can promote the healing of alveolar bone defect and accelerate bone reconstruction in rat models. This effect may be related to the activation of Wnt/β-catenin signaling pathway.

Purpose: To evaluate the effet of one-time one-abutment placement on peri-implant tissues.

Methods: Thirty-five patients with single posterior loss were collected, who received definitive abutment at the moment of implant placement. One day and after 1 year of implant loading, radiographic assessment of marginal bone level changes and clinical status of peri-implant soft tissues were conducted. Plaque index, pocket depth as well as sulcus bleeding index were assessed.

Results: During 1 year follow-up period after loading, no implant failure was observed. The mean marginal bone loss of implants were (0.225±0.113) mm mesially and (0.439±0.123) mm distally. Standard periodontal probes were used to measure plaque index, probing depth, and gingival crevicular bleeding index immediately after repair and 1 year later.

Conclusions: In the posterior region, one-time one-abutment placement may better protect peri-implant tissues as an ideal treatment protocol.

Purpose: To explore the therapeutic effect of stromal cell derived factor-1α(SDF-1α) combined with platelet-poor plasma(PPP) on permanent tooth avulsion injury.

Methods: One hundred and forty-four patients with permanent tooth avulsion injuries admitted to Hengshui People's Hospital from March 2020 to March 2022, with a total of 152 affected teeth were included. They were randomly divided into experimental group of 72 cases(76 teeth) and control group of 72 cases(76 teeth). The control group underwent routine replantation surgery, and the root tips were soaked and rinsed with PPP biological solution before surgery. On the basis of the control group, the experimental group implanted SDF-1α into the alveolar fossa before in vitro tooth implantation for treatment. The patients were followed up for 12 months after surgery, the success rate of implantation, degree of postoperative occlusal pain, expression of inflammatory factors in gingival fluid, serum growth factor expression, and incidence of postoperative complications were compared between the two groups. Statistical analysis was performed with SPSS 19.0 software package.

Results: The success rate of replantation in the control group was 90.79%(69/76), while the experimental group was 98.68%(75/76). The success rate of replantation in the experimental group was significantly higher than that in the control group(P＜0.05). On the 2nd day, 3 months and 12 months after surgery, the pain scores of the two groups of patients gradually decreased (P＜0.05). There was no significant difference in pain scores between the two groups at each time point(P＞0.05). One month after surgery, the CRP and IL-6 levels in both groups decreased(P＜0.05), while the experimental group was significantly lower than the control group(P＜0.05). The soluble intercellular adhesion factor (sICAM-1) in both groups increased, and the experimental group was significantly higher than the control group (P＜0.05). One month after surgery, vascular endothelial growth factor(VEGF), fibroblast growth factor(FGF), transforming growth factor beta(TGF-β)and platelet derived growth factor(PDGF) were all elevated, and the experimental group was significantly higher than the control group(P＜0.05). The incidence of postoperative complications in the experimental group was significantly lower than that in the control group(P＜0.05).

Conclusions: The combination of PPP and SDF-1α in treating patients with permanent tooth avulsion injury has a high success rate of delayed replantation and a low incidence of postoperative adverse reactions.

Purpose: To investigate the effects of chronic periodontitis on the quality of life and severity of the disease in patients with bronchiectasis.

Methods: A total of 80 bronchiectasis patients admitted to The Fourth Hospital of Changsha between April 2021 and April 2023 were randomly selected. Patients were divided into two groups according to whether they had moderate to severe chronic periodontitis: bronchiectasis with periodontitis group (n=45) and bronchiectasis without periodontitis group (n=35). The Qualify of Life Questionnaire for Bronchiectasi(QoL-B) was used to assess patients' quality. The severity of the disease was assessed using the Bronchiectasis Severity Index (BSI), and serum levels of hypersensitive C-reactive protein (hsCRP), tumor necrosis factor alpha(TNF-alpha), and interleukin-6(IL-6) were detected. SPSS 20.0 software package was used for data analysis.

Results: The QoL-B score of bronchiectasis with periodontitis group was significantly lower than that of bronchiectasis without periodontitis group, and the BSI score was significantly higher than that of bronchiectasis without periodontitis group(P＜0.05). The levels of hs-CRP, TNF-alpha and IL-6 in bronchiectasis with periodontitis were significantly higher than those in bronchiectasis without periodontitis group(P＜0.05).

Conclusions: Chronic periodontitis shows significant adverse effects on both quality of life and disease severity in patients with bronchiectasis, which may be related to the common mechanism of inflammatory response between the two kinds of diseases.

Purpose: To investigate the effects of different cortical bone thickness and jaw bone density at implant sites on intraoperative pain during implant surgery.

Methods: One hundred and eighty-seven patients(263 implant sites) who underwent implant placement surgery at the Fourth Affiliated Hospital of Nanchang University from August 2021 to August 2022 were selected to investigate the effects of different cortical bone thickness and jaw bone density HU values at implant sites on the anesthetic effect under local infiltration anesthesia with epinephrine in articaine. SPSS 26.0 software package was used for data analysis.

Results: The mean cortical bone thickness at the painful sites[(3.90±1.36) mm] was significantly greater than that at the non-painful sites [(2.24±0.66) mm], and the difference was statistically significant(P＜0.05). The differences in cortical bone thickness in the mandibular anterior, premolar, and molar regions were statistically significant in the comparison of pain and non-pain sites. The mean HU value of bone density was (764.46±239.75) for the painful sites and (612.23±235.31) for the non-painful sites, with significant difference(P＜0.05). The difference was not significant(P＞0.05) when comparing the HU values of painful sites with non-painful sites in the mandibular anterior teeth and anterior molar region, while the difference was significant(P＜0.05) when comparing the HU values of painful sites with non-painful sites in the mandibular molar region.

Conclusions: Sites with large cortical bone thickness have a greater effect on blocking infiltrative anesthetic penetration and are more prone to intraoperative pain during implantation. In the mandibular anterior and premolar regions, the HU value of the implant sites had less effect on infiltrative anesthetic penetration, and the effect was greater in the mandibular molar region, and the implant sites with high HU values in the mandibular molar region were more likely to have intraoperative pain. When the cortical bone thickness in the planned implant site is greater than 3.9 mm and the mean bone density in the mandibular molar region is greater than 665 HU. If there is sufficient safe distance for hole operation, it is recommended to apply mandibular nerve block anesthesia combined with articaine infiltration anesthesia to avoid intraoperative pain and bad surgical experience for the patients.

Purpose: To observe the effect of orthodontics combined with restoration on masticatory function in deep overbite patients with severe lower anterior teeth attrition.

Methods: From January 2018 to January 2022, a total of 164 deep overbite patients with severe lower anterior teeth attrition were collected and divided into two groups according to different treatment plans: control group(72 patients, with restoration treatment) and experimental group(92 patients, with orthodontics combined with restoration treatment). The chewing efficiency of the two groups was evaluated, temporomandibular joint dysfunction index (DI), muscle palpation index (PI) and cranio-mandibular index (CMI) were calculated. The satisfaction with facial esthetic, the Chinese version of Oral Health Impact Scale-14(OHIP-14) and the repair satisfaction score were evaluated, the occurrence of adverse events between the two groups was compared. SPSS 23.0 software package was used for statistical analysis.

Results: After treatment, the chewing efficiency of the experimental group was significantly improved compared to the control group, while the DI, PI, and CMI were significantly reduced compared to the control group(P＜0.05). Compared with the control group, the satisfaction degree with facial esthetic and restoration in the experimental group was significantly higher, while the OHIP-14 score was significantly lower after treatment(P＜0.05). The incidence of adverse events in the experimental group was significantly decreased compared with the control group (6.52% vs 25.00%, P＜0.05).

Conclusions: Combination of orthodontics and restoration treatment can enhance the effectiveness of restoration treatment for deep overbite with severe lower anterior teeth attrition, improve the mastication function and temporomandibular joint balance,satisfaction and quality of life of patients, as well as reduce the risk of adverse events.

Purpose: To study the damage and the expression of LC3 and p62 of condylar cartilage in fluorosis mouse.

Methods: Thirty 4-week-old male C57BL/6 mice were randomly divided into control group and the experimental group with 15 animals in each group. The control group received regular drinking water and the experimental group received a fluoride concentration of 75 mg/L drinking water for 8 weeks. The structure of condylar cartilage was observed through modified safranine O-fast green FCF cartilage stain kit. Immunohistochemistry was used to detect the expression of MMP-13, type Ⅱ collagen and LC3 and p62. Two-way analysis of variance test was conducted for analysis of semi-quantitative results of immunohistochemistry using SPSS 22.0 software package.

Results: Compared with the control group, the fibrocartilage layer of the experimental group became thinner, the condrocytes were smaller, and the staining became deeper.Immunohistochemistry results showed that the expression of MMP-13 and LC3 increased; the expression of type Ⅱ collagen and p62 decreased in the experimental group.

Conclusions: There was degeneration of the condylar cartilage and autophagy in mice with drinking water containing 75 mg/L fluoride.