BACKGROUND: Rapid expansion of the dental arch is an effective way to rapidly expanse the jaw. Compared with rapid expansion, the slow expansion has higher stability and less recurrence, but the reports on the long-term stability of quad helix expansion are rare. OBJECTIVE: To retrospectively analyze the clinical effect of quad helix expansion in orthodontics. METHODS: Twenty-two subjects with dental arch stenosis in mixed dentition and early permanent dentition who experienced an expansion of at least 3 mm with quad helix appliance were selected for this study. Plaster dental casts and posteroanterior radiographs were evaluated at the beginning of the treatment (T1), at the completion of phase I quad helix expansion or ful treatment (T2), and approximately 2 years fol owing the completion of treatment (T3). The distance between two first molars was measured on the model. J point was drawn on the posteroanterior radiograph in order to measure the distance between the bilateral base bones and the molar inclination, as wel as to evaluate the corrective and orthopedic effects of dental arch expansion. RESULTS AND CONCLUSION: Compared with that before expansion, the first permanent molar inclination and the distance between base bones on two sides were significant increased after quad helix expansion; there were no significant differences in the distance between two first permanent molars, first permanent molar inclination and the distance between bilateral base bones on two sides when compared after quad helix expansion and after 2-year fol ow-up (P > 0.05). The results indicate that the long-term effect of quad helix expansion is stable with orthopedic effect.

Objective:To evaluate the effect of icariin on TNF-αexpression in periodental tissue during root resorption induced by ropid palatal expansion in rats.Methods:24 male Wistar rats were divided randomly into 3 groups(n =8)as group A(none-expansion control group),B(expansion group)and C(icariin and expansion group).In group B and C,an initial force of 50 g was applied to the area between the right and left upper first molars of the rats for 2 weeks for palatal expansion.The rats of group C were given intragastric administration of icariin at 2.5 mg/(kg·d)while the rats of group A and B were given the same dose place-bo.The centered buccal-lingual root and peridentium tissue slices were generated from the upper first molars of the rats.HE stai-ning of the slices was performed.The expression of TNF-αprotein at the compression sites was detected by irnmunohistochemistry. Results:The A values of TNF-αof group A,B and C were 0.030 2 ±0.001 7,0.241 0 ±0.002 4 and 0.088 6 ±0.002 8 respec-tively(B vs A or C,P <0.05).Conclusion:Icariin may inhibit TNF-αexpression in periodental tissue during root resorption in-duced by rapid palatal expansion.

Background: Although there are some Chinese herbal medicines in treatment of constipation, but no multi-center randomized controlled trials have been carried out to prove their effectiveness. Objective: To evaluate the safety and efficacy of Yunchang Capsule in treatment of functional constipation with deficiency of both qi and yin and internal accumulation of poisonous pathogenic factors syndrome, and to explore the clinical dosage. Design, setting, participants and interventions: A randomized, double-blinded controlled, multicenter trial was conducted. A total of 240 patients with functional constipation from West China Hospital of Sichuan University, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, the First Affiliated Hospital of Tianjing University of Traditional Chinese Medicine and Fujian Academy of Traditional Chinese Medicine were randomly divided into three groups: low dose group (80 cases), high dose group (80 cases) and control group (80 cases). Patients in the low dose group were treated with two pills (0.35 g/pill) of Yunchang Capsule and one pill of Yunchang Capsule simulant for three times daily; patients in the high dose group were treated with three pills (0.35 g/pill) of Yunchang Capsule for three times daily; and patients in the control group were treated with three pills (0.35 g/pill) of Biantong Capsule for three times daily. The therapeutic course was 14 days. Main outcome measures: Clinical symptoms, syndromes, and adverse effects were observed before and after the treatment, and blood, urine and stool tests, hepatorenal function and electrocardiogram were also examined. Results: Two cases were excluded, eleven cases were lost to follow-up, and there were 234 patients entered to intention-to-treat (ITT) analysis. After the treatment, the therapeutic effects were calculated by full analysis set (FAS) and per-protocol population set (PPS) analysis respectively. The effects on functional constipation in FAS showed the response rates in the low dose, high dose and control groups were 86.25% (69/80), 82.90% (63/76), and 70.52% (55/78) respectively, and PPS analysis showed the response rates were 85.71% (66/77), 83.56% (61/73), and 70.13% (54/77) respectively. There were no significant differences among the three groups (P>0.05). The effects on traditional Chinese medicine syndrome in FAS showed the response rates in the low dose, high dose and control groups were 78.75% (63/80), 69.74% (53/76), and 67.95% (53/78) respectively, and PPS analysis showed the response rates were 77.92% (60/77), 69.87%(51/73), and 67.53% (52/77) respectively. There were also no significant differences among the three groups (P>0.05). No severe adverse events were observed. Conclusion: Both low dose and high dose of Yunchang Capsule are effective and safe in treatment of functional constipation with deficiency of both qi and yin and internal accumulation of poisonous pathogenic factors syndrome.

OBJECTIVETo investigate the effect of human serum albumin (HSA) on cell attachment of human gingival epithelial cells (HGE).

METHODSHGE were primary cultured with keratinocyte serum-free medium (KSFM) and dispase. The cultured cells were immunohistochemically stained by monoclonal anti-pan cytokeratin. MTT test was employed to investigate the influence of HSA on the cell attachment on polystyrene surface. The cell growth curve of HGE which were cultured in KSFM with 50 g/L HSA was observed.

RESULTSThe results showed significant decrease in cell numbers within 8 hours after HGE were inoculated, in which the polystyrene surface was preincubated with 50 g/L HSA. But it did not prove to be the case from 10 hours to 24 hours after HGE were inoculated. There were no significant difference within 24 hours in cell numbers between cultured in KSFM with 50 g/L HSA and control. The cell numbers in cell growth curve of HGE in KSFM with and without 50 g/L HSA did not show significant difference.

CONCLUSIONSHSA preincubation on polystyrene were produce inhibitory effect of HGE attachment in early stage.

Cell Adhesion ; drug effects ; Cell Count ; Cell Division ; drug effects ; Cells, Cultured ; Epithelial Cells ; cytology ; drug effects ; Gingiva ; cytology ; drug effects ; Humans ; Polystyrenes ; Serum Albumin ; pharmacology

Periodontitis is a common chronic inflammatory disease. Recent studies have shown that chronic stress (CS) might modulate periodontal disease, but there are few models of CS-induced periodontitis, and the underlying mechanisms are unclear. The present study established a rat model of periodontitis associated with CS induced by nylon thread ligatures. The severity of periodontitis was evaluated in this model by radiographic and pathological examination. The inflammatory reaction indicated by the elevated serum levels of interleukin (IL)-1β, IL-6 and IL-8 was assessed by enzyme-linked immunosorbent assay. Toll-like receptor-4 (TLR4) and glucocorticoid receptor-α (GR-α) expressions were detected by reverse transcriptase-PCR and western blotting. Open-field tests and serum corticosterone were used to evaluate CS. The results showed that CS induced behavioral changes and increased corticosterone levels of the animals with periodontitis. CS stimulation markedly increased alveolar bone loss, periodontal pocket depth and the number of plaques. It also enhanced the inflammatory reaction. These results suggest that CS accelerated the ligature-induced pathological changes associated with periodontitis. Further analysis of the mechanisms involved showed that GR-α expression was significantly downregulated in periodontal tissues of the animals undergoing CS. Blocking GR-α signaling in lipopolysaccharide and corticosteroid-treated human periodontal ligament fibroblast cells in vitro significantly upregulated the expression of p-Akt (protein kinase B) and TLR4, promoted nuclear factor-κB activity and increased levels of IL-1β, IL-6 and IL-8. This research suggests that CS might accelerate the pathological progression of periodontitis by a GR-α signaling-mediated inflammatory response and that this may be a potential therapeutic target for the treatment of periodontal disease, particularly in patients with CS.
Alveolar Bone Loss ; Animals ; Blotting, Western ; Corticosterone ; Enzyme-Linked Immunosorbent Assay ; Fibroblasts ; Humans ; In Vitro Techniques ; Interleukin-6 ; Interleukin-8 ; Interleukins ; Ligation ; Models, Animal ; Nylons ; Periodontal Diseases ; Periodontal Ligament ; Periodontal Pocket ; Periodontitis* ; Phosphotransferases

This study assessed the roles of chronic stress (CS) in the stimulation of the sympathetic nervous system and explored the underlying mechanisms of periodontitis. Using an animal model of periodontitis and CS, the expression of tyrosine hydroxylase (TH) and the protein levels of the alpha1-adrenergic receptor (alpha1-AR) and beta2-adrenergic receptor (beta2-AR) were assessed. Furthermore, human periodontal ligament fibroblasts (HPDLFs) were stimulated with lipopolysaccharide (LPS) to mimic the process of inflammation. The proliferation of the HPDLFs and the expression of alpha1-AR and beta2-AR were assessed. The inflammatory-related cytokines interleukin (IL)-1beta, IL-6 and IL-8 were detected after pretreatment with the alpha1/beta2-AR blockers phentolamine/propranolol, both in vitro and in vivo. Results show that periodontitis under CS conditions enhanced the expression of TH, alpha1-AR and beta2-AR. Phentolamine significantly reduced the inflammatory cytokine levels. Furthermore, we observed a marked decrease in HPDLF proliferation and the increased expression of alpha1-ARfollowing LPS pretreatment. Pretreatment with phentolamine dramatically ameliorated LPS-inhibited cell proliferation. In addition, the blocking of alpha1-ARsignaling also hindered the upregulation of the inflammatory-related cytokines IL-1beta, IL-6 and IL-8. These results suggest that CS can significantly enhance the pathological progression of periodontitis by an alpha1-adrenergic signaling-mediated inflammatory response. We have identified a potential therapeutic target for the treatment of periodontal disease, particularly in those patients suffering from concurrent CS.
Adrenergic alpha-1 Receptor Antagonists/*therapeutic use ; Animals ; Cells, Cultured ; Cytokines/immunology ; Fibroblasts/immunology/pathology ; Humans ; Lipopolysaccharides/administration & dosage/immunology ; Male ; Periodontal Ligament/cytology/immunology/pathology ; Periodontitis/*drug therapy/*etiology/immunology/pathology ; Phentolamine/*therapeutic use ; Rats ; Rats, Wistar ; Receptors, Adrenergic, alpha-1/analysis/*immunology ; Signal Transduction/drug effects ; *Stress, Physiological/drug effects ; Tyrosine 3-Monooxygenase/analysis/immunology