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Statement of problem In spite of a digital workflow playing an important role in the intraoral prosthetic rehabilitation of patients with head and neck cancer, information about how it has been implemented and its clinical implications is sparse. Purpose The purpose of this systematic review was to evaluate the use of a digital workflow in the intraoral prosthetic rehabilitation of patients with head and neck cancer by analyzing the frequency and type of the digital procedures used. Material and methods Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. The following terms were applied for the search conducted in the MEDLINE-PubMed, Cochrane, and SciELO databases: (prosthesis OR dental OR rehabilitation) AND (digital OR CAD-CAM OR intraoral scanner) AND (Cancer OR head neck). Articles that specified data on intraoral prosthetic treatment and analyzed the use of a digital workflow in the different prosthetic phases such as digital scanning and computer-aided design and computer-aided manufacturing (CAD-CAM) in patients with head and neck cancer were included. Data from the frequency and type of digital procedures were analyzed. Results Thirteen articles were included, and all had incorporated CAD-CAM techniques in at least 1 of the prosthetic treatment stages (scanning, design, and/or fabrication). Only 1 patient was rehabilitated by using a completely digital workflow. The most frequent prosthetic treatment was an obturator (82.6%). Regarding the image capture method, the most used method was cone beam computed tomography (CBCT) (60.9%). Conclusions Most reports described the partial use of a digital workflow in the intraoral prosthetic rehabilitation of patients treated for head and neck cancer. A digital workflow is used for specific stages but not for the entire process. More studies are needed to evaluate digital systems, ideally comparing parameters with the conventional method, and to determine whether this technique has more relevant clinical implications.

Background: Recurrent Aphtous Stomatitis (RAS) is the most common process affecting the oral mucosa. It is painful, multifactorial and generally recurrent. The aim of this systematic review is to know the last treatment approaches and their effectivity.Material and Methods: we compared the outcome of different kind of treatments in terms of the improvement of the lesions, reduction of the size of those lesions and the time needed for their healing. Inclusion criteria were: clinical trials, articles written in English or Spanish and published less than 5 years ago.Results: we used the following keywords: treatment, aphtous stomatitis, canker sores; combined with Bool-ean operators AND y OR. We selected 28 articles for reading the whole text, and after applying the eligibility criteria, we selected 17 articles for our revision. Among all the treatments, we emphasize the barrier method based in compound of cellulose rubber and a calcium/sodium copolymer PVM/MA, with which the difference in the 3rd and 7th day was of-6,29 +/- 0,14 points in the pain score. The treatment with insulin and chitosan gel, brought a pain suppression on the third day, with no reactivation of the pain during the whole study. The application of a film composed of polyurethane and sesame oil with chitosan, brought a reduction in the size of the lesions of 4,54 +/- 2,84mm on the 6th day compared with the situation before the beginning of the treatment. The different kinds of laser, which produced a reduction in the pain score just at the beginning of the treatment up to 8,1 +/- 1,6 points, and a reduction of the size of the lesions of 4,42 +/- 1,02mm on the 7th day.Conclusions: Besides the classic treatments for RAS, we have to take into account other treatment modalities, above all the different kinds of laser.

RESUMEN Introducción: Los queratinocitos presentes en las células epiteliales del cuerpo humano producen, de manera continuada, pequeñas cantidades de histamina que se mantienen en equilibrio en el epitelio oral. Cuando este equilibro se ve alterado, se produce un aumento de histamina en el tejido oral pudiendo provocar lesiones. Objetivo: En este trabajo de revisión se estudia la relación del exceso de histamina en el Liquen Plano Oral, la Leucoplasia oral y en el Carcinoma Oral de Células Escamosas. Material y método: Búsqueda bibliográfica en la literatura de estudios caso control y retrospectivos acerca del papel de la histamina en el Liquen Plano Oral, la Leucoplasia Oral y el Carcinoma Oral de Células Escamosas. Resultados: Se ha observado un aumento del número de mastocitos y de histamina en los tejidos orales con patología comparado con los tejidos sanos. Conclusión: Este aumento del número de mastocitos y de histamina en los tejidos orales con patología, provocan una desorganización en los precursores de la inflamaciónpudiendo así dañar el epitelio oral.

RESUMEN Introducción: El liquen plano se considera una enfermedad muco-cutánea crónica, en la que la etiopatogenia se considera una alteración autoinmune mediada por células, con una prevalencia entre 0.5 y 2%. La colocación de implantes dentales en pacientes con dicha enfermedad puede hacer cambiar el éxito del tratamiento. Material y Método: se realizó una búsqueda en la base de datos Pub Med y Med line, utilizándose como palabras clave: “lichen planus” y "dental implant". El criterio de inclusión fue de estudios en humanos con liquen plano oral a los que se les había tratado con implantes dentales osteointegrados publicados en lengua inglesa que sean observacionales, experimentales y series de casos publicados entre 1990 y 2020. Resultados: Se selecciona un total de 13 artículos, la N total de implantes fue de 362 implantes colocados en 148 pacientes. El seguimiento de los implantes es de 2 a 10 años. Hay un fracaso de 45 (12,43%) implantes, de los cuales 42 sucede en pacientes con liquen plano activo y 3 en cuadros de liquen erosivo sin especificar si está en fase activa o no. La tasa de fracaso fue mayor en las mujeres (61%) en comparación con los hombres (44%). En uno de los casos, se diagnostica carcinoma oral de células escamosas [COCE] 3 años después de la colocación del implante, lo que corresponde al 0,2% de los casos. Conclusión: el liquen plano oral es una enfermedad autoinmune que debemos tener en cuenta cuando colocamos implantes y controlar periódicamente.

AIMS To conduct a systematic review compiling an update on the pathophysiology of burning mouth syndrome (BMS) by reviewing the theories and studies published in the last 5 years that consider BMS a neuropathic disease. METHODS A literature review was carried out in April 2020 on the PubMed database by using the following MeSH terms: "(burning mouth OR burning mouth syndrome OR burning mouth pain OR sore mouth OR burning tongue OR oral neuropathic pain OR glossodynia OR stomatopyrosis) AND (etiopathogenesis OR etiopathological factors OR etiology)." RESULTS The research carried out according to the methodology found 19 case-control studies (1 of which was in vivo) and 1 RCT. Of the 19 included studies, 8 showed an evidence score of 2-; 8 showed 2+; another 2 showed 2++; and 1 showed 1+. Quality studies on this topic are insufficient and heterogenous. CONCLUSION In the pathogenesis of BMS, both peripheral and central neuropathies appear to play a pivotal role. Nevertheless, the balance between them varies from case to case and tends to overlap. BMS does not seem to be a result of direct damage to the somatosensory nervous system, but a dysfunction in it and in the brain network.

The objective was to assess the effects of non-steroidal anti-inflammatory drugs (NSAIDs) on head and neck cancer (HNC) outcomes. A systematic review was conducted following the PRISMA guidelines. The MEDLINE and the Cochrane Central Register databases were searched. Risk of bias was assessed by the Cochrane Collaboration's tool and by the Newcastle-Ottawa Scale. Meta-analyses were performed with the RevMan software. Seventeen articles met the inclusion criteria. Quality scores for observational studies ranged between 5 and 8 stars and the RCT was assessed as high risk of bias. NSAIDs use was associated with a 13% risk reduction of HNC (OR: 0.87 95% CI 0.77-0.99). NSAIDs use was associated with a 30% reduced cancer-specific mortality and with a 40% decreased risk on disease-recurrence. NSAIDs may have a modest protective effect on HNC risk and a positive impact on cancer-specific survival and disease-recurrence. The findings do not support a protective role of aspirin on HNC outcomes.

Background: Oral antiplatelet and anticoagulant drugs are widely used in a large number of patients visiting the dentist, and there has been much controversy over the years towards their clinical management. The aim to carry out a literature review in order to develop an update on dental management in anticoagulated and / or anti aggregated patients, focusing on oral surgery. Material and methods: A bibliographic search was carried out in PubMed on studies published between January 1, 2018, until December 10, 2020, using the keywords ('antiplatelet' OR 'antiplatelets') AND ('dentistry'), and ('anticoagulant' OR 'anticoagulants') AND ('dentistry'). Results: The number of studies included in this review was 13, and the number of patients among all of them was 3.497 patients under treatment with some type of antithrombotic drug, who underwent different oral surgery treatments. Conclusions: There is a low risk of peri- and postoperative bleeding events during basic oral surgery treatments in antiplatelet or anticoagulated patients, which can be easily managed through the use of local haemostatic measures. Keywords: Oral surgery, antiplatelet drugs, anticoagulant drugs, dental treatment.

Background Metastases in the oral cavity are rare and account for only 1 to 3% of all malignant lesions in this area. The primary location from which most metastases have been described in the oral cavity in adult patients include lungs, breasts, kidneys and colon. Material and Methods A systematic search of the literature was carried out following the PRISMA statement in PubMed database. Clinical trials and case series published in the last 10 years [2010-2020] were eligible to be selected. The headings and keywords used in the searches were “cancer” AND “oral metastases”, “incidence” AND “oral metastases”, “oral metastases” AND “jaw bone”, “oral metastases” AND “soft tissue”. Results For the study of the incidence of metastases in the oral cavity, 9 reports of clinical trials and 7 retrospective studies of case series have been included in this article. The primary locations from which more metastases have been described in the oral cavity are lungs (30.6% or 183 cases), breasts (22.2% or 133 cases), liver (15.5% or 93 cases), prostate (9 % or 54 cases), thyroid glands (8.1% or 49 cases), kidneys (7.3% or 44 cases), skin (2.3% or 14 cases), soft tissues (2% or 12 cases), colon (2% or 12 cases) and gastrointestinal (0.6% or 4 cases). These metastases have a predilection for hard tissues. The clinical presentation of these lesions varies from painless granulomatous lesions to lytic areas in the jaws. Conclusions Although metastases in the oral cavity is an uncommon pathology, early diagnosis is needed so that in the event that it is the first manifestation, it allows the primary tumor to be diagnosed as soon as possible. Key words:Cancer, oral metastases, incidence, jaw bone, soft tissue.

espanolObjetivo: Demostrar la existencia de agregacion bacteriana a los materiales de sutura que suelen emplearse en la practica odontologica, comprobar si dicha agregacion esta relacionada con la inflamacion que sucede al acto quirurgico y por ultimo dar recomendaciones sobre que tipo de sutura se adapta mejor para la prevencion de la adherencia bacteriana. Material y metodo: Busqueda bibliografica a traves de las bases de datos PubMed, Cochrane y Scielo empleando las palabras clave: surgical sutures, bacterial adherence. Como criterios de inclusion se aceptaron los estudios publicados en los ultimos 15 anos, in vivo o in vitro en relacion con la cirugia oral y con un nivel de evidencia cientifico superior a 3 segun los criterios de evidencia cientifica. Fueron excluidas todas aquellas publicaciones que no tenian como objeto de estudio las sutura seda, Nylon™, Supramid™, Monocryl™, Vicryl™ o Vicryl Plus™. Tambien se excluyeron todas aquellas publicaciones que no relacionaban los materiales de sutura a la agregacion bacteriana. Resultados: Un total de 9 publicaciones se organizaron en funcion del tipo de sutura empleada, si eran estudios in vivo o in vitro, el numero de pacientes/muestras, tiempo transcurrido hasta la remocion de las suturas, si se realizaron controles, si existio algun tipo de reaccion inflamatoria, que tipo de bacterias se agregaron y que material obtuvo mayor agregacion. Discusion: Los materiales de sutura que mayor acumulo de placa bacteriana presentan bajo las mismas condiciones de tiempo de exposicion a bacterias, son los de tipo multifilamento reabsorbible no tratados con antimicrobianos. EnglishObjective: To demonstrate the existence of bacterial aggregation to the suture materials that are usually used in dental practice, to verify if aggregation is related to the inflammation that occurs after the surgical act and finally give recommendations on what type of suture is best suited for the prevention of bacterial adhesion. Material and method: Bibliographic search through PubMed, Cochrane and Scielo databases using the keywords: surgical sutures, bacterial adherence. Inclusion criteria were accepted studies published in the last 15 years, in vivo or in vitro in relation to oral surgery and with a level of scientific evidence of more than 3 according to the criteria of scientific evidence. All those publications that did not have the suture subject Silk, Nylon™, Supramid™, Monocryl™, Vicryl™ or Vicryl Plus™ were excluded. All publications that did not relate suture materials to bacterial aggregation were also excluded. Results: A total of 9 publications were organized according to the type of suture used, whether they were in vivo or in vitro studies, the number of patients/samples, time elapsed until removal of the sutures, controls if they were performed, any type of inflammatory reaction, which type of bacteria were added and which material obtained greater aggregation. Discussion: The suture materials with the greatest accumulation of bacterial plaque present under the same conditions of exposure to bacteria, are the reabsorbable multifilament type not treated with antimicrobials.

Multiple systems and associated factors have been described in the literature to assess the prognosis of teeth with periodontal disease. Nowadays there is a tendency among clinicians to consider implants as the best solution after tooth extraction, in cases of teeth with a questionable prognosis. However, the value of the natural tooth must be considered, as the proprioception of the periodontal ligament is preserved, and it adapts to stress during functional loads. We first review the literature focusing on analyzing the factors that should guide decision-making to maintain or extract a tooth with a compromised periodontium. Then, we propose a schematic diagram of prognostic indicators to reflect the main factors to consider and the survival rate that each one represents when preserving or extracting a tooth.

Burning Mouth Syndrome (BMS) is a persistent condition that primarily affects postmenopausal middle-aged women. The absence of clinical indications and burning feelings of the oral mucosa identify this illness.BMS has a complicated aetiology that incorporates a number of factors.BMS can be caused by a variety of local, systemic, and psychological conditions, including stress, anxiety, and depression. BMS Type I, II, or III are possible classifications. Although there are no obvious organic changes and no health hazards associated with this illness, it can drastically affect the patient's quality of life. The objective is to review the available literature related to BMS, and makes special reference to its therapeutic management. The sections that follow will also go through important diagnostic criteria, etiological factors, and clinical aspects. The main objective of management is that of providing support to the patient and working towards symptom reduction, rather than total elimination of such symptoms. Tricyclic antidepressants, benzodiazepines, and antipsychotic medicines are the most frequently accepted therapy alternatives with variable results; nevertheless, there are other therapies that will be presented that can also be used. The management of this group of patients should be done by professionals who talk and reaffirm to them the nature of the disease and discuss the benefits of intended therapies or possibility of pain relief. Patients should be educated about the need for a multidisciplinary team approach and the probability of needing multiple changes in therapies until effective treatment is achieved. Professionals in the field of dentistry should develop standardised symptoms and diagnostic criteria so that multidisciplinary research can more easily discover the most successful and reliable BMS treatment techniques.

The association between general health and oral health has been studied over recent years. In order to evaluate the lifestyle and the presence of healthy habits, a descriptive observational study was conducted from December 2018 to April 2019 with 230 patients, aged from 18 to 65 years old, that attended the Dental Hospital of the University of Barcelona for the first time. A total of 230 participants were considered, 98 (43%) were men and 132 (57%) were women, with a mean age of 37 years old. Our hypothesis was that patients with healthy habits had a better oral status in comparison with patients with bad lifestyle habits. No statistically significant results were found regarding oral hygiene between gender, smokers and patients with systemic pathology. Regarding a healthy lifestyle (High adherence to dietary intake), no statistically significant results were found. No significant differences were found regarding physical activity between male and female patients. Our hypothesis wasn’t confirmed, therefore, we cannot conclude that patients with healthy habits have better oral status in comparison with patients with bad lifestyle habits. Consequently, more prospective longitudinal studies should be carried out.

Systemic antibiotics are routinely prescribed in implant procedures, but the lack of consensus causes large differences between clinicians regarding antibiotic prophylaxis regimens. The objectives of this systematic review are to assess the need to prescribe antibiotics to prevent early implant failure and find the most appropriate antibiotic prophylaxis regimen. The electronic search was conducted in PubMed/MEDLINE, Scielo and Cochrane Central Trials Database for randomized clinical trials of at least 3 months of follow-up. Eleven studies were included in the qualitative analysis. Antibiotics were found to statistically significantly reduce early implant failures (RR = 0.30, 95% CI: 0.19–0.47, p < 0.00001; heterogeneity I2 = 0%, p = 0.54). No differences were seen between preoperative or both pre- and postoperative antibiotic regimens (RR = 0.57, 95% CI: 0.21–1.55, p = 0.27; heterogeneity I2 = 0%, p = 0.37). A single preoperative antibiotic prophylaxis dose was found to be enough to significantly reduce early implant failures compared to no antibiotic (RR = 0.34, 95% CI: 0.21–0.53, p < 0.00001; heterogeneity I2 = 0%, p = 0.61). In conclusion, in healthy patients a single antibiotic prophylaxis dose is indicated to prevent early implant failure.