Medication related osteonecrosis of the jaws (MRONJ): Factors related to recurrence after treatment with surgery and platelet rich plasma (PRP) placement.

BACKGROUND: Medication-related osteonecrosis of the jaws (MRONJ) is a well-known complication associated with antiresorptive and antiangiogenic therapies. The purpose of this study was to analyse if there is any predictive factor of recurrence after local debridement plus platelet rich plasma (PRP) placement in MRONJ patients. MATERIAL AND METHODS: Seventy MRONJ patients treated at the department of Oral and Maxillofacial Surgery in La Paz Hospital (Madrid, Spain) were included in this retrospective study. All of them were treated surgically by local debridement and PRP placement. The observation period was between January 2012 and January 2019. Information regarding use, type, administration, and duration of therapy with BP/denosumab was recorded. The follow-up period ranged from 2-52 months. A descriptive analysis, a bivariate and a multivariate study were performed. RESULTS: Most of the patients were women (82.9%) between 50-70 years old (64.3%), with a stage II disease (74.3%). The therapy lasted more than 12 months in 54.8% of them. Zoledronic acid was the main antiresorptive used (44.3%), followed by oral administered BPs (29 patients, 41.4%) and denosumab (10 patients, 14.3%). Osteoporosis (48.6%), breast cancer (30%) and multiple myeloma (11.4%) were the main diseases because the patients were taking antirresorptives. 13 patients (18.6%) experienced recurrence. We found that breast cancer patients (p>0.0001), smokers (p>0.016), and administration of zoledronic acid (p>0.0001) were related to recurrence. After performing the multivariate model, we found that the only factor related to recurrence was smoking habit (Wald 3.837, p=0.05, OR 6.12). CONCLUSIONS: recurrence after local debridement plus PRP placement in our MRONJ series affected to 18.6% of patients. It seems to be more frequent in breast cancer patients, smokers, and after zoledronic acid administration. Smoking habit was the only independent factor related to recurrence in our series.

Expression of clec9a in the oral cancer microenvironment. A preliminary immunohistochemical pilot study.

BACKGROUND: The search for treatments to improve cancer survival has led to the emergence of immunotherapy and the study of the tumour microenvironment existing in neoplasms. This preliminary study aims to understand the clinical and pathological relationship of clec9a expression in oral cancer and to explore survival models for future studies. MATERIAL AND METHODS: Immunohistochemical study that included 26 patients with a diagnosis of oral squamous cell carcinoma (OSCC) in mobile tongue and floor of the mouth. Clinical and histopathological variables were recorded, and the biomarkers clec9a for dendritic cells and CD8 and CD4 for lymphocytes were used. RESULTS: Clec9a was expressed in 58% of the sample. It was more common in cases with low lymphoplasmacytic infiltration and in type 2 invasion patterns. It was significantly related to CD8 expression (p=0.055 and p=0.007). No prognostic risks were evident in the survival models studied (overall survival, disease-specific survival, disease-free survival). CONCLUSIONS: CLEC9A expression is present in the OSCC microenvironment and is mainly related to the presence of CD8 lymphocytes. The relationship of its expression with survival prognosis in OSCC could not be confirmed; however, this needs to be confirmed through future studies with larger sample size.

Preliminary study of the Craniofacial Pain and Disability Inventory-11: validation for patients with head and neck cancer.

BACKGROUND: Cancer involves numerous physical, psychological and emotional changes and has a negative impact on patients. Although there are a wide variety of questionnaires for general use in patients with cancer, very few are available that assess the pain, disability and craniomandibular functionality of patients with head and neck cancer (HNC) in a more specific manner. The purpose of this study is to present the preliminary behavior of the CF-PDI in its reduced version adapted for patients with HNC. MATERIAL AND METHODS: A total of 61 patients with HNC were included in a study to preliminarily analyze the internal consistency of the instrument, the convergent validity and the floor and ceiling effects. All the patients completed the informed consent document and a battery of 5 questionnaires: The Numerical Rating Scale (NRS), the Tampa Scale for Kinesiophobia for Temporomandibular Disorders (TSK-TMD), the Pain Catastrophizing Scale (PCS), the Quality of Life Questionnaire in patients with HNC (QLQ-HN) and the reduced version of the Craniofacial Pain and Disability Inventory (CF-PDI-11). Patients also performed 2 physical tests: measurements of the pain threshold on the masseter muscle and on the distal phalanx of the first finger; and the maximum mouth opening in neutral head position. RESULTS: Cronbach's α coefficient showed a very high internal consistency of 0.92. In terms of convergent validity, a statistically significant correlation was found between the CF-PDI-11 and the following variables: NRS, TSK-TMD, PCS, QLQ-HN, the threshold of pain in the distal phalanx of the first finger and the maximum interincisal opening. However, 21.3% of patients obtained the lowest possible score. The strongest correlation was found between the CF-PDI-11 and the QLQ-HN (r = 0.85, p <0.01). CONCLUSIONS: The preliminary version of the CF-PDI-11 shows that it could be a valid and reliable instrument to measure pain, disability and quality of life in patients with HNC.

Oral mucositis. Is it present in the immunotherapy of the immune checkpoint pd1/pd-l1 against oral cancer? A systematic review.

BACKGROUND: Oral mucositis (OM) is a painful lesion that takes place in the mucosa of the oral cavity, usually its etiology is associated with drug therapies in cancer patients. It is presented as well-defined ulcers whose painful symptomatology sometimes implies the suspension of oncological treatment or parenteral feeding, being therefore an important adverse effect, marking the evolution of these types of therapies against cancer. The present work aim is to know the prevalence of oral mucositis in oral cancer immunotherapy compared to its prevalence in standard therapy. MATERIAL AND METHODS: A protocol was developed for a systematic review following PRISMA® guidelines and a focused question (PICO) was constructed. A comprehensive literature search was conducted on electronic databases including PubMed, the SCOPUS database, the Cochrane library and the Web of Science (WOS). RESULTS: Six clinical trials were included that met the different inclusion criteria. In these articles, a discrepancy between the prevalence of OM in patients treated with chemotherapy and patients treated with immunotherapy related to the immune checkpoint PD-1/PD-L1 (Nivolumab and Pembrolizumab) was observed. CONCLUSIONS: The prevalence of oral mucositis is lower in new immunotherapy with monoclonal antibodies against oral cancer than drugs used so far (chemotherapy drugs [methotrexate, cisplatin] as well as cetuximab). However, more studies should be carried out to confirm these data.

Traqueotomía híbrida. Una alternativa válida para pacientes críticos obesos COVID-19 / Hybrid tracheotomy. A valid alternative for obese critical patients COVID-19

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A novel mobile application to determine mandibular and tongue laterality discrimination in women with chronic temporomandibular disorder.

BACKGROUND: Chronic pain from temporomandibular disorders (TMDs) is caused by a somatosensory disturbance due to sustained activation of central nervous system nociceptive pathways, which can induce changes in neuroplasticity in the thalamus, basal ganglia and limbic system, as well as disturbances in the somatosensory, prefrontal and orbitofrontal cortex and cognitive impairment. The main objective of this study was to determine the discrimination capacity of mandibular and tongue laterality between women with chronic TMDs and asymptomatic women. MATERIAL AND METHODS: This descriptive-comparative study examined 2 groups with a total of 30 women. All participants were between the ages of 23 and 66 years and were assigned to the chronic TMD group or the asymptomatic group according to the inclusion criteria. We employed a mobile application developed specifically for this study to measure the accuracy and reaction time (RT) of mandibular and tongue laterality discrimination. RESULTS: The chronic TMD group had a lower success rate in laterality discrimination (mean mandibular accuracy of 40% and mean tongue accuracy of 67%) than the asymptomatic group (mean mandibular accuracy of 61% and mean tongue accuracy of 90%). These results showed statistically significant differences between the groups for mandibular laterality discrimination (d, 1.14; p<0.01) and tongue laterality discrimination (d, 0.79; p=0.03). The asymptomatic group had faster RTs than the chronic TMD group. The data revealed statistically significant differences for the right mandibular RT (d, 0.89; p=0.02) and right tongue RT (d, 0.83; p=0.03). However, there were no significant differences for left mandibular and left tongue RT. CONCLUSIONS: We found that the women with chronic TMDs had a lower success rate and slower RTs in the discrimination of mandibular laterality when compared with the asymptomatic women.

Manejo de pacientes en cirugía oral y maxilofacial durante el periodo de crisis y de control posterior de la pandemia de COVID-19 / Management of patients in oral and maxillofacial surgery during the stage of crisis and subsequent control of COVID-19 pandemic

La pandemia por la nueva infección respiratoria conocida como enfermedad coronavirus 2019 (COVID-19), causada por el virus SARS-CoV-2, ha desencadenado una perturbación sin precedentes en la actividad habitual de los servicios de cirugía oral y maxilofacial en España, retrasando la atención rutinaria de pacientes e intervenciones quirúrgicas programadas. Los cirujanos orales y maxilofaciales son uno de los colectivos sanitarios con mayor riesgo de infección nosocomial por el estrecho contacto que se produce con los pacientes asintomáticos y sintomáticos con infección por SARS-CoV-2 a través de la cavidad oral y orofaringe. El propósito del presente documento ha sido actualizar la evidencia disponible para el manejo y tratamiento seguro y efectivo en consulta, cirugías ambulatorias, programadas y urgentes y hospitalización, minimizando al mismo tiempo, tanto como sea posible, el riesgo de contagio para el cirujano oral y maxilofacial, personal sanitario y pacientes. Este documento pretende esclarecer los aspectos más significativos y crear un protocolo común de manejo de pacientes con COVID-19 en cirugía oral y maxilofacial durante la fase aguda de propagación y de control posterior de la pandemia en nuestro país

The pandemic due to the new respiratory infection known as coronavirus 2019 disease (COVID-19), caused by the SARS-CoV-2 virus, has triggered an unprecedented disruption in the normal activity of oral and maxillofacial surgery departments in Spain, delaying routine patient care and elective surgical interventions. Oral and maxillofacial surgeons are one of the healthcare groups with the highest risk of nosocomial infection because of the close contact that occurs with asymptomatic and symptomatic patients with SARS-CoV-2 infection through the oral cavity and oropharynx. The purpose of this document has been to update the available evidence for the safe and effective management and treatment in outpatient clinic, ambulatory, elective and emergency surgeries, and hospitalization, while minimizing as much as possible the risk of infection for the oral and maxillofacial surgeon, health workers and patients. This document aims to clarify the most significant aspects and create a common protocol for the management of patients with COVID-19 in oral and maxillofacial surgery during the acute stage of spread and subsequent control of the pandemic in our country

Oral and dental health status in patients with eating disorders in Madrid, Spain.

BACKGROUND: The aim of the present study was to describe and compare the oral and dental health status of two groups, one diagnosed with eating disorders (EDs), and another group without this pathology, assessing the following oral manifestations: dental alterations, periodontal disorders, soft tissue disorders, non-stimulated salivary flow, and oral pH. MATERIAL AND METHODS: This comparative transversal epidemiological study included 179 participants, of whom 59 were diagnosed with EDs (Eating Disorder Group: EDG) and 120 had no antecedents of EDs (No Eating Disorder Group: NEDG). All patients fulfilled the following inclusion criteria: women aged over 18 years, diagnosed with an ED by a specialist, patients who had undergone at least 1 year monitoring by the Clinical Nutrition Unit, and had not received any periodontal treatment during the previous 6 months. Both groups were homogeneous in terms of sex, age, education, and socioeconomic level. Oral exploration was performed, registering clinical variables, as well as sociodemographic and socioeconomic data, oral hygiene habits, and smoking. Statistical significance was established as p<0.05 (confidence level > 95%). RESULTS: The dental erosion (DE) was the most significative feature of dental alterations. The degree of DE was significantly greater in the EDG (p<0.001). A significant association between soft tissue lesions and EDs was found (p<0.001) A notable difference in non-stimulated salivary flow was found between the groups (p<0.001). No significant differences between the groups were found for periodontal status, dental caries, or oral hygiene practices. CONCLUSIONS: On the basis of the results obtained, it is necessary to carry out oral/dental examination as soon as an ED is diagnosed with regular check-ups thereafter.

Oral squamous cell carcinoma of tongue: Histological risk assessment. A pilot study.

BACKGROUND: More than 90% of malignant tumors diagnosed in the oral cavity are Oral Squamous Cell Carcinomas (OSCC) whose preferred location is the tongue. Classically, this disease has affected men preferentially, although recent studies suggest that trends are changing and the proportion of women with OSCC is increasing. In addition, the prevalence of oral cancer is also determined by some risk factors as alcohol consumption and tobacco. Currently, the Tumor, Node, Metastasis (TNM) classification is employed to defined tumor stage and based on this guide specific treatments are established. However, 5-year-survival does not exceed 50% of cases. The objective of this study is to determine whether a histological risk pattern indicative of higher recurrence might be present in T1-T2 tumors located in the anterior two thirds of the tongue. MATERIAL AND METHODS: Samples from 26 patients with OSCC were analyzed and histological risk pattern of recurrent and non-recurrent tumors were compared. We have analyzed histological variables described in Anneroth and Brandwein-Gensler classifications. Additionally, we have also examined both clinical variables such as age, sex or comorbidities, as well as habits such as tobacco or alcohol consumption. RESULTS: We found that sex (male) and keratinization degree (high or moderate) are directly related with OSCC recurrence. In fact, free illness time is lower in men and higher in those cases with minimal or no keratinization. CONCLUSIONS: Based on the variables analyzed, it has not been possible to establish a histological risk pattern that, complementary to the TNM classification, could have a predictive role in these early-stage tongue carcinomas.

Bisphosphonate-related osteonecrosis. Application of adipose-derived stem cells in an experimental murine model.

BACKGROUND: Bisphosphonate-related osteonecrosis of the jaw is a pathological condition without effective established treatment and preventive strategies. The aim of this study was to analyse the effect of adipose-derived stem cells (ASC) in an experimental murine model of osteonecrosis. MATERIAL AND METHODS: 38 Wistar rats were injected intraperitoneally with zoledronic acid. After treatment, upper jaw molars were extracted. The animals were randomly assigned to one of two groups. In the control group, saline solution was applied over the alveolar sockets after the tooth extractions. In the treatment group, ASCs were applied instead of saline solution. The control and treatment groups were subdivided based on the time of euthanasia. A clinical and histological analysis was performed. RESULTS: The presence of osteonecrosis in alveolar bone was observed in a similar distribution in both groups. In the ASC-treated group, new bone formation was greater than in controls. CONCLUSION: In this study, application of ASCs showed greater new bone formation in an osteonecrosis-like murine model. Previous inhibited post-extraction bone remodelling could be reactivated, and these findings appeared to be secondary to implantation of ASCs.

Reconstrucción craneal mediante malla de titanio y cemento de apatita carbonatada / Cranial reconstruction iwth titanium mesh and hydroxyapatite cement

Presentamos el caso de un paciente de 45 años de edad, que tras ser intervenido en dos ocasiones de un meningioma gigante del ala mayor del esfenoides mediante una craneotomía pterional con ampliación órbito-zigomática, sufre un proceso infeccioso en el colgajo óseo que obliga a la retirada del mismo. Se decidió realizar la reparación del defecto craneal mediante el uso combinado de una malla de titanio y cemento de hidroxiapatita (Norian®), sumando así la resistencia del titanio al excelente resultado estético en cuanto a contorno y volumen que se puede lograr con el cemento de hidroxiapatita (AU)

We report the case of a 45 year-old patient who was affected by an infectious disease of the temporal bone, after the surgical treatment of a meningioma in the greater sphenoid wing. This infection healed after the resection of the craniotomy flap. The remaining bone defect was reconstructed using a titanium mesh covered by hydroxyapatite cement (Norian®). The result was excellent due to the strength of the titanium mesh and the volume and contour offered by the hydroxyapatite cement (AU)