ABSTRACT
Objective:To explore the high-frequency ultrasonographic and clinical features of superficial intravascular tumors.Methods:Thirteen superficial intravascular tumor patients who underwent ultrasound examination form Beijing Jishuitan Hospital during 2016-2020 were retrospectively analyzed. The location, anatomic blood vessels, shape, size, boundary, internal echo, blood flow and clinical characteristics of the tumors were analyzed.Results:Among the 13 cases, most of the tumors were oval like or long strip, and a few were round like. All 11 cases of primary intravascular tumors showed hypoechoic mass; 2 cases of intravascular metastasis or recurrence showed solid hypoechoic with hyperechoic mass. Arterial blood flow spectrum was detected in 12 cases. Two patients with glomus tumor showed typical tenderness at the fixed point. Two patients had a history of bone tumors in the upper or lower extremities.Conclusions:High frequency ultrasound can clearly recognize the location of the superficial intravascular tumors, describe the morphological characteristics and sonographic features of the tumor, then help to make a more accurate qualitative diagnosis.
ABSTRACT
Objective:To measure the pubo-femoral distance of hips of the infants diagnosed with Graf type Ⅰ by high frequency ultrasound.Methods:A total of 1 084 infants(2 168 hips) diagnosed with Graf type Ⅰ by ultrasonography were collected in Beijing Jishuitan Hospital from June 2019 to May 2020. The ultrasonographic examinations included Graf method and pubo-femoral distance measurement. The 95% medical reference value was adopted to confirm range of normal values of the pubo-femoral distance. And the differences of the pubo-femoral distance between different gender, age and bilateral hip were compared.Results:The pubo-femoral distance of hips diagnosed with Graf type Ⅰ was (0.27±0.06)cm, the pubo-femoral distance of males was(0.27±0.06)cm, the pubo-femoral distance of females was (0.27±0.07)cm. The 95% medical reference value was 0.15-0.38 cm. The 95% medical reference value of males was 0.15-0.39 cm, and the 95% medical reference value of females was 0.13-0.41 cm. There were no significant differences between the sexes or between the age(all P>0.05). The difference between the bilateral hip joints from the same infant was statistically significant[(0.274±0.064)cm vs (0.265±0.064)cm, P<0.05]. Conclusions:The 95% medical reference value of hip diagnosed with Graf type Ⅰ is 0.15-0.38 cm.
ABSTRACT
Objective@#To compare the efficacies of two training protocols, i.e. the multimedia instruction and the conventional method, in periodontal surgery teaching for undergraduate students.@*Methods@#One hundred and twenty-three dental undergraduates in their pre-clinical training course were recruited and divided into two groups according to the learning grade matching principle: the experimental group (multimedia instruction, 60 students) and the control group (conventional method, 63 students). The teaching aim was to train the students gingivectomy and periodontal flap surgery by using the pig jaws. The conventional teaching method of teacher-demonstrating and student-practicing was used in the control group, and the practice time of the students′ for each surgery was 45 minutes. A standardized teaching video combined with the teachers′ explanations of the key steps was used in the experimental group. The students′ practice time for each surgery was 60 minutes. The efficacy of teaching protocol was evaluated by the teachers according to the scoring criteria set by the teaching group.@*Results@#In gingivectomy training, accuracy of fixed points, angle of postoperative gingival margin and morphology of gingiva of the experimental group were better than those of the control group. The experimental group also had more complete and continuous excised gingivae and more thorough adjacent gingival removal. The total scores of the experimental group were significantly higher than those of the control group (92.8±2.6 vs. 89.9±3.7, P<0.05). In periodontal flap surgery training, the experimental group operated the blade around the shape of the tooth better in internal bevel incision than the control group. Additionally, the incision position of internal bevel incision, periosteal integrity after flapping and flap depth of the experimental group were better than those of the control group. Besides, the experimental group had smoother flap edge and more thorough debridement. The total scores of the experimental group were significantly higher than those of the control group (92.2±4.1 vs. 89.2±4.4, P<0.05).@*Conclusions@#The teaching efficacy of multimedia instruction was better than that of the conventional method. Its value needs to be further tested in future teaching practice.
ABSTRACT
Objective@#To explore the training pattern of periodontal probing practice so as to improve the accuracy of probing depth measurements of undergraduate students.@*Methods@#Sixty-two undergraduate dental students in their pre-clinical training course were divided into two groups (31 students in each group): the reform group and the control group. The students in reform group learned and practiced periodontal probing by using transparent gingiva models for 30 minutes, and using conventional periodontal probing models for further 90 minutes in two sessions. The total practicing time was 2 hours. The students in control group learned and practiced periodontal probing using conventional periodontal probing models only for 1 hour of practicing time. After the training, new conventional periodontal probing models were used to evaluate the accuracy of probing depth measurements of the students in the two groups. The probing depths of Ramfjord index teeth were recorded by the students and were compared with the results of an experienced teacher's measurements.@*Results@#The percentage of absolutely consistent sites in the reform group (63.4% [708/1 116]) was significantly higher than that of the control group (60.0% [670/1 116]) (P=0.012). In both reform group and control group, the percentages of absolutely consistent sites of the incisors (reform group: 69.1% [257/372], control group: 65.9% [245/372]) were significantly higher than those of the molars (reform group 58.9% [219/372], control group 54.3% [202/372])(P< 0.01), meanwhile, the percentages of absolutely consistent sites of the buccal-lingual sites (reform group: 88.7% [330/372], control group: 80.4% [299/372]) were significantly higher than those of the interproximal sites (reform group: 50.8% [378/744], control group: 49.9% [371/744])(P<0.01).@*Conclusions@#The comprehensive reform of periodontal probing training could improve the accuracy of probing depth measurement of the undergraduate students. During the pre-clinical practice, probing training in the molar areas and the interproximal sites should be reinforced.
ABSTRACT
Objective@#To research the variation of subgingival microorganisms after 65 μm glycine powder air-polishing (GPAP) in patients with periodontitis during periodontal maintenance phase and make comparison with conventional method.@*Methods@#From Department of Periodontology, Peking University School and Hospital of Stomatology, twenty-one patients at the age of 35-72 (8 males and 13 females) who were systematically healthy were recruited in this study. According to splitting-mouth design, one side of a mouth was randomly assigned to the experiment group (21 patients, 248 teeth, 1 488 sites) with 65 μm GPAP therapy while the opposite side served as the control group (21 patients, 249 teeth, 1 494 sites) with ultrasonic scaling plus polishing paste therapy. The clinical periodontal parameters including probing depth (PD), bleeding index (BI), bleeding on probing (BOP) and plaque index (PLI) were recorded. Using sterile currette, the subgingival plaque samples were collected at the mesio-buccal site of the first or second molars at baseline, 2, 4, 8 and 12 weeks after therapy, respectively. After Congo red staining, the microorganisms were classified into cocci, bacilli and spirochetes and counted respectively.@*Results@#All clinical periodontal parameters have no difference between two groups at baseline and after treatment 12 weeks. In the experiment group and the control group, PD ([2.33±0.90] and [2.37±1.18] mm), BI (0.96±0.70 and 0.98±0.78) and PLI (0.00[1.00] and 0.00[1.00]) of two groups after treatment 12 weeks were better than those at baseline (PD: [2.48±1.17] and [2.46±0.99] mm; BI: 1.07±0.72 and 1.08±0.75; PLI: 0.00 [1.00] and 0.00 [1.00]) (P<0.05). But BOP(+)% was observably reduced only in the control group after treatment 12 weeks ([17.25±2.21]% vs [25.23±2.83]%) (P<0.05). The percentages of cocci, bacilli and spirochetes were stable and there were not significant differences between the two groups (P>0.05).@*Conclusions@#After 65 μm GPAP therapy, the differences of proportion of subgingival microorganisms are not significant, while the control group has the same trend. The spirochetes remained at a low level, but they rebounded fasterly in the test group than that in the control group. The results indicate that 65 μm glycine powder air-polishing has the similar clinical effects compared with ultrasonic scaling plus polishing paste. However, the clinical indications should be limited to the patients with shallow pockets and without obvious dental calculus.
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the clinical effect of the 65 µm glycine powder air-polishing (GPAP) and ultrasonic scaling during periodontal maintenance phase.</p><p><b>METHODS</b>Twenty-three patients at the age of 28-72 (8 males and 15 females) who were systematically healthy were involved in this study. According to splitting-mouth design, one side of a mouth was randomly assigned to the experiment group with 65 µm GPAP therapy, while the other side was the control group with ultrasonic scaling therapy. The clinical parameters including probing depth (PD), bleeding index (BI), gingival recession (Rec), plaque index (PLI), staining index (SI) were recorded. The patients' perception of treatment was assessed by visual analogue scale (VAS). The treatment time was recorded and compared between the two groups.</p><p><b>RESULTS</b>Both of the two methods had good clinical effects. PD, BI and PLI of the two groups 12 weeks after treatment were better than those at baseline (P < 0.01). There was no significant deference between the two methods at baseline and at the 12 weeks after treatment. The VAS value of experiment group was better than that of control group (1.7 ± 1.3 vs. 3.3 ± 1.8, P < 0.01). The treatment time of experiment group was also shorter than that of control group [(192.7 ± 82.7) s vs. (345.4 ± 116.9) s, P < 0.01].</p><p><b>CONCLUSIONS</b>The results indicate that 65 µm GPAP may be as effective as the ultrasonic scaling during periodontal maintenance phase. 65 µm GPAP had the advantage of more comfort and less time consuming.</p>
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Air Abrasion, Dental , Methods , Dental Plaque Index , Dental Polishing , Methods , Dental Scaling , Methods , Gingival Recession , Diagnosis , Glycine , Periodontics , Powders , Random Allocation , Ultrasonic Therapy , Methods , Visual Analog ScaleABSTRACT
Objectives: The incidence of cervical carcinoma is increasing in young females.More and more clinical researches focus on the choice of therapeutic methods and improvement of the patients' survival.This study aimed to evaluate the efficacy of preoperative concurrent chemoradiation for stage Ⅰb-Ⅱb high-risk cervical carcinoma in young females.Methods: We retrospectively analyzed the clinical data of 118 female patients(≤35 years) with stage Ⅰb-Ⅱb high-risk cervical carcinoma,bulky,low-differentiation or non-squamous.According to preoperative treatments,the patients were divided into three groups,Group 1 preoperatively treated by concurrent chemoradiation,Group 2 by neoadjuvant chemotherapy and Group 3 by radiotherapy(intracavitary irradiation),all followed by radical hysterectomy.And those with pathologically reported pelvic lymph node metastasis,deep cervical stromal invasion,vascular tumor thrombosis,or surgical margin positivity received postoperative chemotherapy and/or radiotherapy.Results: The disappearance rate of cancer cells and the rate of superficial myometrial invasion were significantly higher in Group 1 than in the other two groups(P
ABSTRACT
Objective: To measure GCF calprotectin and total protein for evaluating whether the calprotectin could be a sensitive marker for the initial inflammation of gingiva. Methods: Eleven young male subjects with healthy gingiva, who had no systemic diseases, were selected for this study. GCF samples (4 teeth /person) were collected with strips of filter paper at baseline (0 day), on the 7 th, 14 th, 21 st days (without oral hygiene), and 28 th day (7 days after reestablishing oral hygiene) during experimental gingivitis. The amount of calprotectin was measured by ELISA. The amount of total protein was assessed with protein dye binding assay. Results: The amount of calprotectin increased during the experimental gingivitis, and reached the highest level on the 21 st day. After oral hygiene was reestablished it reduced to the level of baseline. The amount of total protein had the same tendency as calprotectin. Conclusion: The amount of calprotectin and the total protein in GCF can reflect the initial inflammation of gingiva.
ABSTRACT
Objective:To observe the changes of plaque microflora during the experimental gingivitis and to analyze the relationship between the plaque microflora and the clinical parameters.Methods:11 young male subjects with healthy gingiva and without systemic disease were selected.Subgingival plaque samples(2 sites /person)were collected and then smeared by Gongo red at baseline(0 day),the 7th,14th,21st day(without oral hygiene)and 28th day(7 days after reestablishing oral hygiene)respectively during experimental gingivitis.At the same time the clinical parameters were recorded.The results of smear and the clinical parameters were analyzed.Results:The percentage of spirochete was the lowest at the baseline and increased during the experimental gingivitis,and then reached the highest level on the 21st day.The percentage of spirochete of the 21st day showed the significant different compared with that of baseline(P0.05)Conclusion:Spirochete is correlated to the development of the gingivitis.