Resective surgical approach shows a high performance in the management of advanced cases of bisphosphonate-related osteonecrosis of the jaws: a retrospective survey of 347 cases.

PURPOSE: The aim of this study was to evaluate the results of the surgical treatment of bisphosphonate-related osteonecrosis of the jaw (BRONJ) in a large cohort. MATERIALS AND METHODS: A retrospective cohort multicenter study was designed. Patients were enrolled if they were diagnosed with BRONJ and received operative treatment. Data on demographic, health status, perioperative, and surgical factors were collected retrospectively. The primary outcome variable was a change in BRONJ staging (improvement, worsening, or no change). Interventions were grouped by local debridement and resective surgery. Data were collected for other variables as cofactors. Univariate analysis and logistic regressions were then performed. RESULTS: Of the 347 BRONJ-affected subjects, 59% showed improvement, 30% showed no change, and 11% showed worsening. Improvement was observed in 49% of cases treated with local debridement and 68% of cases treated with resective surgery. Multivariate analysis indicated that maxillary location, resective surgery, and no additional corticosteroid treatment were associated with a positive outcome. CONCLUSIONS: Surgical treatment of BRONJ appeared to be more effective when resective procedures were performed. Nonetheless, other factors, such as the absence of symptoms and the types of drug administration, should be taken into account before clinical decisions are made.

An Investigation on Micro-Raman Spectra and Wavelet Data Analysis for Pemphigus Vulgaris Follow-up Monitoring.

A wavelet multi-component decomposition algorithm has been used for data analysis of micro-Raman spectra of blood serum samples from patients affected by pemphigus vulgaris at different stages. Pemphigus is a chronic, autoimmune, blistering disease of the skin and mucous membranes with a potentially fatal outcome. Spectra were measured by means of a Raman confocal microspectrometer apparatus using the 632.8 nm line of a He-Ne laser source. A discrete wavelet transform decomposition method has been applied to the recorded Raman spectra in order to overcome problems related to low-level signals and the presence of noise and background components due to light scattering and fluorescence. This numerical data treatment can automatically extract quantitative information from the Raman spectra and makes more reliable the data comparison. Even if an exhaustive investigation has not been done in this work, the feasibility of the follow-up monitoring of pemphigus vulgaris pathology has been clearly proved with useful implications for the clinical applications.

Oral cancer and dentists: knowledge, attitudes, and practices in Italy.

The purpose of the survey was to assess through a mailed questionnaire the knowledge, attitudes, and behaviors regarding oral cancer and their relationship with different indicators in a random sample of 1000 dentists in Italy. Respondents know the major risk factors and only half identify the diagnostic procedures. One-third indicated the most common form and the early lesions and this knowledge was more likely in those graduated from dental school and attended a course on oral cancer in the previous year. Approximately two-thirds (64.8%) believed that they were prepared to perform an oral cancer examination and to palpate lymph nodes in patients' necks. Multiple logistic regression revealed that this positive attitude was significantly higher for those who graduated from medical school and for those who have attended a course on oral cancer in the previous year. Half of the dentists routinely perform an oral cancer examination on all patients and it was more likely by those graduated from dental school, those who know that squamous cell is the most common form of oral cancer and that an early oral cancer lesion usually is a small, painless red area, those who believed that they are prepared to perform an oral cancer examination and to palpate lymph nodes in patients' necks, those who have attended a course on oral cancer in the previous year, and those who claim they need information. The importance of health care professionals as communicators of public health messages should be emphasized.

If pemphigus vulgaris IgG are the cause of acantholysis, new IgG-independent mechanisms are the concause.

Pemphigus vulgaris (PV) is a disease of epidermal adhesion. Its pathogenesis is currently traced back to the action of autoantibodies against antigens located within the intercellular substance of keratinocytes, such as desmogleins and acetylcholine receptors. In the present paper, we sought to elucidate the non-IgG-mediated effects of PV sera on keratinocytes. Results showed that PV sera depleted of IgG were able to induce well-defined changes on keratinocyte morphology and metabolic activity. Indeed, PV IgG-free sera determined marked alterations on cell shape, accompanied by partial loss of keratinocyte-keratinocyte interactions within 48 h after treatment. Furthermore, PV IgG-depleted sera caused a sharp reduction of cell viability along with a less sustained weakening of intercellular adhesion strength. In light of the above findings, loss of cell-cell adhesion in PV occurs as a result of the cooperating action of both IgG and non-IgG-mediated mechanisms. These data have remarkable consequences on experimental models of PV and might open new "biological" approaches to its therapy. Thus, researchers are well advised that PV pathophysiology cannot be faithfully reproduced by leaving non-IgG serum factors out of consideration.