In vivo study of the effectiveness of quantitative percussion diagnostics as an indicator of the level of structural pathology of teeth after restoration

Statement of problem

Conventional diagnostic aids based upon imagery and patient symptoms do not indicate whether restorative treatments have eliminated structural pathology.

Influence of the site of origin on the outcome of squamous cell carcinoma of the maxilla—oral versus sinus

The maxilla may be affected by squamous cell carcinoma (SCC) from both oral and sinus sites. We sought to determine whether the site of origin of the maxillary tumour, oral as compared to sinus, influences survival. Univariate Kaplan–Meier and multivariate Cox proportional hazard models analysis of 58 patients with SCC involving the maxilla, treated with curative intent, was conducted. The overall 5-year disease-free survival for the group was 41.7%. Five-year disease-free survival for oral subsite SCC was 56.8%, while for sinus subsite was only 21.6%. Univariate analysis found SCC of sinus origin to be associated with a poorer prognosis, however this was not confirmed on multivariate analysis. T-stage and positive margins were found to be the only independent risk factors. For SCC of the maxilla, sinus origin of the tumour per se does not confer a poorer prognosis; however, as a result of the complex anatomy of the midface, these tumours can present at an advanced stage, while surgical control of the disease can be more difficult, especially posteriorly. Tumour size and positive margins were the determinants of a poor prognosis in this group of patients with maxillary SCC.     

FTIR characterization of the setting reaction of biodentine™

Objective

To provide insight of the setting reactions of Biodentine?, a hydraulic calcium silicate cement, based upon observations using Fourier Transform Infra-Red (FTIR) spectroscopy.

In vivo effects of geranylgeraniol on the development of bisphosphonate-related osteonecrosis of the jaws

Background

Bisphosphonate-related osteonecrosis of the jaws (BRONJ) is a complication of the bisphosphonate (BP) treatment and its pathopysiology is still not fully understood. The existing preventive and treatment options require updates and more attention. Geranylgeraniol (GGOH) so far demonstrated an increased activity and viability of the cells previously treated with zoledronic acid (ZA). The aim of this study was to evaluate the in vivo effects of GGOH on the development of BRONJ.

Consideration of effect of the amount of mandibular setback on the submental region in the planning of orthodontic–orthognathic treatment

Aesthetic outcome has gained in importance in the treatment of patients with orthognathic problems. Historically, Class III malocclusions have historically been treated by isolated mandibular setback and maxillary advancement, whereas bimaxillary procedures have recently become the more common option. Functional outcome and stability have been discussed previously. The aim of this observational study was to evaluate the effect of mandibular setback (BSSO) on the cervical region. We studied 38 Class III patients (20 women and 18 men, mean (SD) age 25 (0.8) years) who we identified from our clinical records and who were treated between 1 January 2002 and 30 December2012 with mandibular setback procedures and followed up for 6 months. To study the effect of the amount of mandibular setback on the aesthetic outcome we have distinguished between patients with less than 5 mm setback and those with 5 mm or more. In patients whose mandibular setback was less than 5 mm there was no significant change in cervical length. However, it decreased significantly in patients in whom the movement was 5 mm or more. Postoperatively the lip–chin–throat angle (p = 0.02), the length of the lower lip (p = 0.002), and the length of the upper lip (p = 0.003) from the aesthetic line also differed significantly between the 2 groups. Our observations strongly suggest that all these relations should be considered when treatment is being planned to avoid an unpleasant aesthetic impact on the chin region.     

Electrosynthesis of novel π-extended benzofuran derivatives of porphyrincatecholes

Two new functionalized π-extended benzofuran catechol porphyrins and nanostructured Mn-porphyrins have been synthesized by a green one-pot method and structurally characterized by spectroscopic analysis. The electro-oxidation of 5,10,15,20-tetrakis(2,3-dihydroxyphenyl) porphyrins(1a-b) with four catechol units in the presence of 3-hydroxy-1H-phenalene-1-one (3) as bidentate nucleophile has been done and benzofuran rings have formed by the intermolecular and intramolecular Michel addition reactions. Coulometry and voltammetry results allowed us to propose four independent ECEC mechanisms for the electrochemical oxidation pathway. Functionalization of the porphyrins affected their photophysical properties such as the efficiency of the fluorescence that would support the energy transfer between the porphyrin core and the substituted subunits.     

Does the size matter? Evaluation of effect of incorporation of silver nanoparticles of varying particle size on the antimicrobial activity and properties of irreversible hydrocolloid impression material

Objectives

The main objective of the present in vitro study is to evaluate the antimicrobial activity and properties of irreversible hydrocolloid impression material incorporated with silver nanoparticles of varying size at different concentrations.

Juvenile cemento-ossifying fibroma of the maxilla:Report of one case and renew of the literature

Juvenile cemento-ossifying fibroma (JCOF) is a rare lesion that exhibits a slow growing but may reach massive proportion and cause considerable cosmetic and functional problems. This lesion has the tendency for recurrence following incomplete excision. A case report of giant JCOF in a 46-year-old female with 23-year history is presented. Local excision and thorough curettage was performed and the normal skeletal structure was maximally preserved. 15-month follow up demonstrated no sign of recurrence.     

Prediction of compliance and completion of orthodontic treatment: are quality of life measures important?

The main aim of the present investigation was to evaluate whether there is an association between completion of orthodontic treatment and quality of life measures, i.e. age, gender, socio-economic status, type of appliance and need for orthodontic treatment. The secondary aim was to evaluate whether compliance with orthodontic treatment (missed appointments and appliance breakages) was associated with age, gender, socio-economic status, or type of appliance. This was a multi-centre longitudinal observational study carried out on 144 patients (65 males and 79 females) aged 10-19 years. Baseline data were collected: patient age, gender, socio-economic status, Index of Orthodontic Treatment Need (IOTN), and type of appliance. Quality of life information, including orthodontic utility values and oral aesthetic subjective impact score (OASIS), were also collected at the start of treatment. The main outcome measure was whether a patient completed treatment. Compliance was assessed by recording the number of failed appointments and appliance breakages. Multiple regression analysis was used to investigate the association between independent and dependent variables. None of the baseline variables, including quality of life measures, were associated with a patient completing treatment, or their compliance with treatment (P > 0.05). Thus, quality of life measures (utility values or OASIS) do not add to our knowledge of who may complete, or co-operate with, orthodontic treatment. In addition, neither age, gender, socio-economic status nor clinical treatment need (IOTN) were useful in helping a clinician to choose potentially co-operative patients.     

Value of videoroscopy in the detection of alterations of? Actinic Cheilitis?and the selection of biopsy areas

Background

To demonstrate the value of videoroscopy in identifying lesions and alterations not seen by oroscopy and to select the area for biopsy.

Material and Methods

Eighty patients were subjected to anamnesis, physical exam, videoroscopy exam, toluidine blue test and biopsy. A diagram of the lips was created to record the exact location where the lesion was found.

Results

Physical exam identified 287 lesions, and videoroscopy identified 587 lesions; erythema and white lesions were the most common lesions associated with actinic cheilitis. Of the 59 performed biopsies, 32 (52.4%) cases were identified by videoroscopy that showed lesions that were not detected during physical examination.

Conclusions

The establishment of a diagram of the lip permitted registration of the precise location of the lesion. Videoroscopy was effective in locating lesions not seen by oroscopy. Both videoroscopy and the diagram of the lips allowed for better and earlier diagnosis and better patient follow-up for those with actinic cheilitis. Key words: Actinic cheilitis, potentially malignant disorder, videoroscopy, dermatoscopy, lip. oroscopy, diagram of lip.     

Management of exposure of three-dimensional mandibular reconstructive plates in mandibular reconstruction： Report of 2 cases

Expmisure of three dimensionil mmdibuiar reconstnietive plate was a main complcation is clinical application ,which includ intaond expusure and exlsuoul exposure .This paper reporbed two typical cases with plate expostre und reviewed the litralmes in unaly in the canses of plate exposure and its preventive measures .     

Diagnostic template research of craniofacial characters of Class Ⅱ patients

Objective To analyze the morphological characters and mechanism of Class Ⅱpatients. Methods 894 Class Ⅱ patients were collected from the orthodontic department, Peking University School of Stomatology from 1997 to 2000. The standardized coordinates of thecephalometric radiograms were obtained by Procrusts Superimposition (PS). Cluster analysis was carried out to divide the patients into different subdivisions and the cephalometric character of each template was analyzed. Resulst 894 patients were divided into 11 subdivisions with specialcharacteristics. The morphological templates were constructed by computer. Conclusions Procrusts method was effective to study the classification of the malocclusion. According to the template and its cephalometric value, Class Ⅱ malocclusion were mainly due to the mandiblar retrusion, and verticaldiscrepancy present in 60percent of the patients.     

A study on the fit of the base plate —Influence of canditions of storage—

The aims of this study was to define the effect of storage conditions of base plates, which consist of self-curing resin. Examinantions were made on the dimensional accuracy with the passage of time of base plate stored in water and air on a plaster model for standerdized maxillary edentulous. The following conclusions were obtained;