Study on sealing ability of iRoot used as root end retrograde filling material / 重庆医学

Objective To detect the sealing ability of iRoot as root end retrograde filling material in vitro experiment,and to compare it with mineral trioxide aggregate(MTA) in order to provide reference basis for clinical use of iRoot.Methods The dental crown was removed in 67 single root canal anterior teeth.The routine root canal preparation and filling were performed.The root end was resected by 3 mm for conducting root end retrograde preparation.Sixty-three teeth in the samples were randomly divided into 4 experimental groups.Then the different materials were used for root end filling:iRoot BP (group A,n=17),iRoot BP plus (group B,n=17),MTA (group C,n =17),and group D(iRoot BP + gutta percha,n =12),the residual 4 samples served as the control group.The apical microleakage of 10 teeth in each experimental group was detected by the fluid dynamics.The microleakage situation at the time points of 1,7,14,28 d was observed.In addition,2 teeth selected from each group were performed the filling material ultramicrostructure observation by SEM.Each 5 teeth were remained in the group A,B and C and performed the Micro CT scanning.The porosity rate of filling material was detected.Results No obvious edge gap was found between the filling materials and dentin surface in the group A,B and D by SEM,but obvious gap could be seen in various samples of group C.Micro CT scanning found that the porosity rates in the group A,B and C were 0.020 ±0.023,0.045 ±0.035 and 0.031 ± 0.011 respectively,but showing no statistical difference(P＞0.05).The fluid dynamic experiment showed that the microleakage detection value in each group had no statistical difference(P＞0.05).Conclusion The sealing ability of iRoot and MTA used in root end retrograde sealing has no obvious difference,But iRoot operability is superior to MTA.

Clinical analysis on 3 792 cases of child oral mucosal diseases in Chongqing / 重庆医学

Objective To understand the characteristics and regularity of child oral mucosal diseases in Chongqing by analyzing its related factors so as to provide a reference for its diagnosis and treatment.Methods A total of 3792 children with oral mucosal diseases in the stomatology department of our hospital from January to December 2015 were taken as the research subjects for analyzing the disease entities,gender,age,onset time.Results Among 3 792 cases,15 kinds of oral mucosal diseases were recorded.The top five places of prevalence rates were herpetic stomatitis (42.67 ％),oral candidiasis(23.36 ％),traumatic ulcer(14.82 ％),recurrent aphthous ulcer (8.81％) and migratory glossitis (8.65％).Conclusion The clinical characteristics of child oral mucosal diseases are complex and various,and the onset age and time have a certain rule,which indicates that early diagnosis and treatment are very important to prognosis.

Effective evaluation of presurgical nasoalveolar molding devices in the treatment of complete unilateral cleft lip and palate patients / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the orthopedic effect of presurgical nasoalveolar molding (PNAM) devices on the palatal deformities in unilateral complete cleft lip and palate (UCCLP) patients.</p><p><b>METHODS</b>Three groups with 19 patients each were studied. All samples in groups A and B were non-syndromic UCCLP children. Group A was treated with PNAM prior to operation. Group B was untreated prior to operation. Samples in group C were normally developed nose and lip palate infants aged three months. The orthotopic palate photos before and after PNAM treatment for group A, as well as pre-operative photos of groups B and group C, were taken and measured. All statistics were analyzed using SPSS 21.0.</p><p><b>RESULTS</b>PNAM treatment significantly increased the AW, AC, and PA of UCCLP patients (P < 0.05), whereas CPW, CWA, CWAS, CWAH, PMD, and CA significantly decreased (P < 0.05). However, no significant difference was observed with the cases in group C (P < 0.05). The AW, CPW, CA, and PA of the patients in group B significantly increased compared with the cases in group A before PNAM treatment (P < 0.05). Multivariate analysis of variance indicated that TW had no statistically significant difference among the three groups (P > 0.05).</p><p><b>CONCLUSION</b>PNAM treatment is a non-surgical early treatment for the effective improvement of palatal primary deformities in UCCLP patients.</p>

Right submandibular ectopic thymus: a case report / 华西口腔医学杂志

Submandibular ectopic thymus is rare in clinical. As this lesion is usually asymptomatic, it easily leads to misdiagnosis and treatment failure. This article reported a case of submandibular mass caused by ectopic thymus, and discussed based on relevant literatures.

Research on the current situation of re-visiting at 4 traditional Chinese clinics in urban area of Beijing / 国际中医中药杂志

ObjectiveTo research the current situation at traditional Chinese clinics in urban area of Beijing,and to propagate the importance of re-visiting.Methods500 outpatients were selected randomly from 4 traditional Chinese clinics in urban area of Beijing from April 1st in 2010 to March 31st in 2011.Questionnaires were undertaken by these patients,including 120 first visitors and 380 re-visitors,then SPSS17.0 was used to statistically analyze the re-visiting proportion,influence factors and reasons for re-visiting.Results The highest re-visiting proportion was 56.7％ in 4 clinics and the total was 47.0％; 13.6％ patients who didn't have re-visit choice for their having no significant curative effect,12.6％ for having no time,10.3％ for having been recovered; patients who had curative effect and doctor's advice to re-visit may be the related influence factors of re-visiting; in the investigation of reasons,73.0％ patients made re-visit choice for having curative effect,35.9％ for doctors' good medical ethics,35.9％ for doctors' advice.ConclusionThere was a low re-visiting proportion in these 4 traditional Chinese clinics in urban area of Beijing; the top three non-revisiting reasons were no significant curative effect,having no time and having recovered.Having curative effect and doctor's advice to re-visit may be the related influence factors of re-visiting; the top three re-visiting reasons were curative effect,doctor's good medical ethics and doctor's exhortation.

Simultaneous repair of cleft lip and closure of cleft hard palate with vomer flaps in patients with unilateral complete cleft lip and palate / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this study was to retrospect the prognosis of simultaneous repair of cleft lip and closure of cleft hard palate with vomer flaps in patients with unilateral complete cleft lip and palate.</p><p><b>METHODS</b>A retrospective study was carried out in 47 patients with unilateral complete cleft lip and palate and, simultaneously received repair of cleft lip and closure of cleft hard palate with vomer flaps. The duration of operation, as well as the blood loss during the operation was recorded, and compared with those patients who only received cleft lip repair.</p><p><b>RESULTS</b>All the operations were successful, and the wound healed well. The procedure of simultaneous repair of cleft lip and closure of cleft hard palate with vomer flaps did not prolong the operating time, compared with simple cleft lip repair. No blood transfusion was needed due to closure of cleft hard palates with vomer flaps.</p><p><b>CONCLUSION</b>Simultaneous repairs of cleft lip and closure of cleft hard palate with vomer flaps are safe for patients with unilateral complete cleft lip and palate.</p>

Repair of cleft hard palate with absorbable membrane of poly-DL-lactic acid: A clinical report / 实用口腔医学杂志

Objective:To study the effects of poly-DL-lactic acid(PDLLA) biomembrane in the repair of cleft hard palate. Methods:Thirty-two cleft palate patients, age 2.67 to 12.83 years old, were treated. The traditional surgical method was used to close the cleft soft palate, and the PDLLA biomembrane was implanted into the surgical gap between the periosteum and bone at the hard palate and fixed with suture to close the cleft hard palate. Clinical follow-up was conducted for 6 months.Results:Operations on all 32 patients were completed successfully.The average surgical time was not prolonged, and post-operative complication was not increased. Wound healing of soft palate, uvula and hard palate was uneventful with no incidence of fistula or dehiscence. Conclusion: PDLLA absorbable biomembrane can be used to repair cleft hard palate.