Chronic recurrent parotitis (CRP) is a non-obstructive parotid inflammation in young children or adults, generally associated with recurrent and intermittent swelling of parotid gland, while children are more susceptible. The etiology of this disease is not clear, clinical manifestations are similar to other diseases, and the effective prevention and control measures are lack currently. This paper reviewed the research progress of the etiology of CRP in recent years, and summarized the role of sialography, ultrasonography and sialoendoscopy in diagnosis and treatment, and summarized the main points of diagnosis and differential diagnosis of CRP in children and adults. The relationship and identification of two kinds of CRP and clinically confusing Sjǒgren's syndrome were analyzed.
Objective Meta analysis was used to evaluate and compare the efficacy of treatment of dentin hypersensitivity with arginine desensitization toothpaste and commonly used desensitization toothpaste. Methods A computerized search of Wanfang, PubMed, web of science, and Cochrane library databases was performed, and a manual retrieval was supplemented. Randomized control trials (RCT) about arginine-containing desensitization toothpaste for dentine hypersensitivity were collected, then data extraction and quality assessment were performed by 2 raters independently. Meta-analysis was carried out by RevMan 5.3 software. Results A total of 7 RCTs were included. All the results were evaluated by the tactile sensitivity test and the air blast test. The mean and standard deviation of each treatment group were analyzed by the random effects model. Meta-analysis results showed there was statistical significance in the therapeutic effects between arginine-containing desensitization toothpaste and potassium-containing desensitization toothpaste(tactile sensitivity test to evaluate: SMD = 1.83, 95% CI BP, 2.58], P ＜ 0.05; cold air assessment: SMD = -1.19, 95% CI [-1.69, -0.69], P ＜ 0.05); However, there was no statistical significance between arginine-containing desensitization toothpaste and strontium-containing desensitization toothpaste (tactile sensitivity test to evaluate: SMD = 0.68, 95% CI [-1.59, 2.96], P ＞ 0.05; cold air assessment: SMD = -0.94, 95% CI [-2.28, 0.40], P ＞ 0.05). Conclusion It shows that arginine-containing desensitization toothpaste has greater effects than potassium-containing desensitization toothpaste for dentin hypersensitivity, but no better effects than strontium-containing desensitization toothpaste.
Objective To investigate the role of osteoprotegerin (OPG) in implant osseointegration in ovariectomized rats.Methods 12 weeks after bilateral ovariectomy, each rat accepted 2 titanium screws in the proximal tibiae. All animals were then randomly divided into 2 groups: control (10 rats) and OPG group (10 rats). Subcutaneous injection of OPG (10 mg/kg) or vehicle was performed 3 times a week. 8 weeks later, tibiae with screws were harvested for μCT, histological and biomechanical analysis.Results Compared to control, OPG increased the percent bone volume by 124%, the percent osseointegration by 167%, the mean trabecular number by 111%, the mean trabecular thickness by 92%, the mean connective density by 95%; and decreased the mean trabecular separation by 64% in μCT analysis. OPG also increased bone area density by 160% and bone-to-implant contact by 234% in histomorphometric evaluation, and increased the maximal push-out force by 228% in biomechanical test.Conclusion Systemic administration of OPG can improve implant osseointegration and fixation in ovariectomized rats, resulting from the increased peri-implant bone mass and improved trabecular microarchitecture.
Objective To explore the anti corrosion ability of laser welded composite wire in artificial saliva containing salivary amylase and pancreatic amylase, and to compare the effect of two kinds of amylase on corrosion resistance of wire and its mechanism.Methods The corrosion resistance of composite wire was evaluated by electrochemical polarization and immersion test. The soluble corrosion products after 28 d immersion in artificial saliva were detected by plasma spectrometer. The surface morphology was analyzed by scanning electron microscope, energy spectrometer and atomic force microscope.Results Salivary amylase and pancreatic amylase could improve the corrosion resistance of the composite arch wire; the same isomerase would have different effects on the same alloy corrosion resistance.Conclusion When the new metal biological material is applied to the oral cavity, the amylase may have influence on its corrosion resistance.
Objective The aim of this study is to measure the labial alveolar bone thickness of the Angle Ⅱ, Division 2 patients and healthy adults with CBCT technique, in order to provide reference for clinical dental orthodontic design.Methods ixty cases were consecutively selected from the Fourth Affiliated Hospital outpatients of Inner Mongolia Medical College. They were divided into the case group and control group. Each group contains 30 patients (15 men and 15 women). CBCT was used to scan maxillofacial region and 3D models were made on computer, software was used to measure labial alveolar bone thickness in three points of the teeth (the root, central and apical). Analyze the result finally.Results There was no significant difference between contralateral teeth. There was significant difference between the Angle Ⅱ, Division 2 patients and control group in different gender. There was significant difference between the case and control group in the thickness of incisor L1, L3, lateral incisor of L1, L3 and canine of L1, L2, L3.Conclusions There is no difference in the thickness of labial alveolar bone wall of the same tooth in both groups. Maxillary anterior labial bone wall of male is thicker than female’ in both groups. The maxillary anterior region of labial bone of Angle Ⅱ, Division 2 patients is thinner than normal adults in thecontrol group.
Objective To compare the influences on periodontal condition between self-ligating brackets and conventional brackets. Methods A total of 120 subjects (age range between twelve and sixteen) were selected which were averaged into four groups (C, S1, S2, S3) at random by different bracket types. Group C included 40 patients with conventionally-ligated bracket as control group, and the others (S1, S2, S3) included 40 patients respectively with self-ligating brackets as experimental groups. Before treatment and 1, 3, 6 months after beginning of treatment respectively, the periodontal parameters PLI, GI, PD were examined. Results There was no significant difference between the 4 groups between T0-T1. 3,6 months after the orthodontic treatment , no matter conventionally-ligated bracket or self-ligating brackets, the periodontal parameters PLI, GI of the tested teeth increased significantly than before, however, the values of PD did not show any significant difference. Three and six months after beginning of treatment, PL, SBI, PD between the conventional and self-ligating groups have significant differences (P＜0.05). There were no statistically significant differences at all the time intervals between the self-ligating brackets groups (P＞0.05). Conclusion The self-ligating brackets have an advantage over conventional brackets with respect to the periodontal improving of control of plaque and gingival bleeding, but not for periodontal pocket depth.
Objective To assess the clinical effectiveness of mild to moderate skeletal Class Ⅲ malocclusion cases by placing upper incisor brackets upside down with straight wire appliance. Methods Sixty-six patients with mild to moderate skeletal Class Ⅲ in the early permanent dentition were chosen and randomly allocated to two groups. Thirty three patients were treated with brackets bonded commonly (17 non-extraction and 16 extraction) and the other 33 patients were treated with brackets bonded upside down (18 non-extraction and 15 extraction). Lateral cephalometric radiographs were taken and measured before and after treatment, and statistical analysis was performed. Results In non-extraction cases, there were significant differences of the change with treatment of SNA(°), U1-SN(°) and U1-NA(°) between the experimental group and the control group (P＜0.05). In extraction cases, there were significant differences of the change with treatment of SNA(°), U1-SN(°), U1-NA(mm), U1-NA(°), L1-MP(°), L1-NB(mm), L1-NB(°) and U1-L1(°) between the experimental group and the control group (P＜0.05). Conclusion Bonding upper incisor brackets upside down could increase labial roots torque of upper incisors in skeletal Class Ⅲ malocclusion cases, which helped improve esthetic and function of the patients to some extent.
Squamous cell carcinoma in tongue base is one of the most worst prognosis cancer, which usually gets into an end-stage disease. The authors report 2 cases of advanced squamous cell carcinoma in tongue base with system disease, which were treated by iodine 125 seeds implantation combined with EGFR inhibitor effectively.
Objective To compare the clinical effect of magnetic attachment and ball-cap attachment in implant rehabilitation in mandibular edentulous patients. Methods 128 mandibular edentulous were divided into A, B two groups according to double-blind randomization. There were 64 people in each group. Subjects in group A and B received routine oral examination, panoramic radiograph to establish the model of alveolar bone and make restoration plan. The magnetic attachment was applied in patients of group A in restoration treatment, while ball-cap attachment was used in group B. Patients of both groups were recalled a year later, and the periodontal tissue health and satisfaction were evaluated. The periodontal tissue health was examined according to clinical standards. Results The gingival health status of group A and B showed significant differences (P = 0.00), The gingival health status of group A was better than group B. The mobility was also analyzed. The results showed that group A was better than group B in mobility of abutments (P = 0.003), There was no significant difference (χ 2 = 1.875, P ＞ 0.05) in aesthetics. There was significant difference (P ＜ 0.05) between two groups in fixity, chewing ability and comfortability. Group A were better than group B. Conclusion The magnetic attachment shows better performance in implant retention and protects the health of periodontal tissue, which make patients feel more comfortable and satisfied.
Enamel demineralization usually occurs during orthodontic treatment which is found white spots that affect the esthetic of teeth. Characterized by minimally invasive and painless, infiltration resin can be easily accepted by the patients which blocks the development of caries and improves the appearance of the teeth. This paper discusses the characteristics of infiltration resin such as color stability and micro-hardness.
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