Publications by authors named "Alan Roger Dos Santos-Silva"

Background: Hemangiolymphangioma is an uncommon benign lesion characterized by the simultaneous presence of both vascular and lymphatic vessels. It has been rarely reported, and its occurrence in the oral cavity is even rarer compared to other regions, with only 18 cases published in the English-language literature. In addition, there are doubts about the best approach.

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Background: Marginal gingival leukoplakias are relatively uncommon and rarely discussed in the scientific literature. Studies suggest they are distinct from other leukoplakias due to aggressive behavior and a strong association with proliferative verrucous leukoplakia. This study aimed to evaluate the clinicopathological characteristics of patients diagnosed with marginal gingival lesions.

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Objective: Burning Mouth Syndrome (BMS) is an idiopathic chronic orofacial pain disorder with diagnostic and therapeutic challenges. Inexperienced clinicians may desperately resort to online information. The objective of this study was to evaluate the usefulness, quality, and readability of responses generated by three artificial intelligence large language models (AI-LLMs)-ChatGPT-4, Gemini, and Microsoft Copilot-to frequent questions about BMS.

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Background: The prevalence of medically compromised patients seeking dental care varies across different countries. There have been no published reports about this clinical topic in Mexico.

Objectives: We aimed to determine the prevalence of systemic diseases in patients who attended the Diagnostic Clinic at the Faculty of Dentistry of the Autonomous University of San Luis Potosí in Mexico from 2011 to 2019.

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Objective: This systematic review aimed to describe the method followed during physical examination and the anatomical structures of the head and neck assessed in screening for oral cancer and oral potentially malignant disorders (OPMDs).

Study Design: An extensive literature search was carried out using MEDLINE/PubMed, EMBASE, Scopus, LILACS, Web of Science, Cochrane databases, and gray literature. The risk of bias was available in all papers included.

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Background: Subgemmal neurogenous plaques (SNP) are composed of neural structures found in the posterolateral portion of the tongue, rarely biopsied as most of them are asymptomatic or eventually only clinically managed. We aimed to investigate a case series of possible correlation of symptomatic subgemmal neurogenous plaque (SNP) with coronavirus disease 2019 (COVID-19).

Methods: Eleven formalin-fixed paraffin-embedded cases from patients with previous confirmed COVID-19 (by RT-PCR) were retrieved from two pathology files.

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Purpose: This systematic review aimed to determine whether the pentoxifylline and tocopherol (PENTO) protocol effectively reduce the risk of osteoradionecrosis (ORN) in patients undergoing tooth extraction after head and neck radiotherapy.

Methods: We searched PubMed, SCOPUS, LILACS, EMBASE, Web of Science, and Cochrane databases up to August 2022. We considered only studies that included patients diagnosed with head and neck cancer undergoing tooth extraction with PENTO prophylaxis after radiotherapy.

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Oral cancer is a public health problem worldwide with approximately 300,000 new cases diagnosed every year and more than 170,000 deaths annually. Squamous cell carcinoma (SCC) accounts for approximately 90% of all oral malignancies and it is frequently preceded by lesions known as oral potentially malignant disorders (OPMDs). Screening programs for early detection of oral lesions have been conducted.

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The oral lymphoepithelial cyst (OLC) is an uncommon lesion whose pathogenesis remains poorly understood. The aim of this study was to report the clinicopathologic features of the OLCs and to verify a possible association between OLCs and subgemmal neurogenous plaque (SNP) in the posterior lateral region of the tongue. A retrospective descriptive cross-sectional study was carried out.

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Objectives: The aim of this systematic review was to examine the evidence of the binary histologic grading system capacity for predicting malignant transformation and to compare it with that of the WHO systems.

Material And Methods: A systematic review was conducted, using PubMed, EMBASE, LILACS, Web of Science, Scopus, and LIVIVO databases without any language or timeframe restrictions. Studies were included if they compared the binary and the WHO histologic grading systems in the prediction of malignant transformation of oral epithelial dysplasia (OED).

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Giant cell arteritis (GCA) is a chronic vasculitis comprising large- and medium-sized arteries branches originating from the aortic arch. GCA diagnosis might be challenging due to its several clinical characteristics. This clinical report describes a case of a 91-year-old woman who was admitted with tongue necrosis.

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Objectives: Describe the epidemiological profile of patients with oral squamous cell carcinoma (OSCC) around dental implants (DI), investigate the spectrum of clinical and pathological characteristics, and discuss the implications of diagnosis delay of these lesions.

Methods: Retrospective analysis of patients treated of OSCC adjacent to DI at A.C.

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Despite the long-term survival rates of osseointegrated dental implants, several biological complications are known to affect the peri-implant tissues, such as peri-implant mucositis and peri-implantitis. Occasionally, the clinical features of these more common benign lesions, or others nonrelated to implants, might be similar to oral malignancies, leading to misdiagnosis. The objective of this study was to present a case series of oral cancer located adjacent to dental implants, aimed to identify the reasons for initial misinterpretation of diagnosis.

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Purpose: To evaluate implant and prosthetic survival rates of full-arch rehabilitations retained by three implants in patients with edentulous mandibles.

Materials And Methods: This systematic review was developed following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. The focused question was: Are fixed mandibular 3-implant retained prostheses safe and predicable for full-arch mandibular prostheses? The Medline/PubMed and Cochrane Library databases were used to conduct the systematic search for clinical trials on fixed mandibular 3-implant retained prostheses published between 1999 and 2020.

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Background: The Milan System for Reporting Salivary Gland Cytopathology (MSRSGC) was recently proposed. Herein, we retrospectively applied this nomenclature system to salivary gland lesions sampled by ultrasound-guided fine-needle aspiration (FNA).

Methods: All cases of salivary gland FNA with available surgical follow-up, in the period from 2014 to 2017 at our institution were reviewed and reclassified according to one of the six categories of the MSRSGC, blind to the surgical outcome.

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Article Synopsis
  • The study aimed to compare the imaging characteristics of mandibular ameloblastomas and odontogenic keratocysts (OKC) using panoramic radiographs (PR) and CT scans.
  • Nine cases each of ameloblastomas and OKC were analyzed for features like shape, internal structure, borders, and bone erosion through both imaging methods.
  • The results indicated that while PR is useful for locating lesions, CT offered more detailed insights into various aspects like bone structure and tooth root resorption, highlighting that ameloblastomas uniquely showed tooth root resorption.
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Stafne's bone defect (SBD) is an uncommon bone alteration that affects the mandible and usually presents as an asymptomatic radiolucency located in the posterior region of body or angle of the mandible, below the alveolar canal. Although clinical and radiographic features are more often sufficient for the diagnosis, other lesions and bone alterations have been described in the differential diagnosis and may lead to a misinterpretation and an incorrect diagnosis. Herein, we report a case of an 89-yearold man with metastatic prostate cancer to multiple bones, presenting an asymptomatic solitary well-defined radiolucent image on the right side of the posterior body of the mandible, in close contact with its inferior border.

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Matrix metalloproteinases (MMPs) such as gelatinases are differentially expressed in human tissues. These enzymes cleave specific substrates involved in cell signaling, tissue development and remodeling and tissue breakdown. Recent evidences show that gelatinases are crucial for normal dentin development and their activity is maintained throughout the entire tooth function in the oral cavity.

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Melanotic neuroectodermal tumor of infancy frequently affects the maxilla. A communication between the oral and nasal cavities can be created by surgery. The authors rehabilitated a young patient with obturator prostheses to correct feeding.

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Previous studies have demonstrated that myofibroblasts in the adjacent stroma are involved in the development and progression of malignant tumors. The aim of this study was to investigate the involvement of myofibroblasts in the progression of oral squamous cell carcinomas (OSCCs) by determining myofibroblast density in potentially malignant and malignant oral lesions. A total of 69 potentially malignant oral lesions (leukoplakias with mild, moderate or severe dysplasia), 90 OSCCs (well-, moderately and poorly differentiated), eight oral verrucous carcinomas and 29 fibrous hyperplasias were examined for the presence of myofibroblasts using immunohistochemical detection of isoform α of smooth muscle actin.

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Background: The presence of regional lymph node metastasis has an important impact on clinical management and prognostication of patients with oral tongue squamous cell carcinoma (SCC). Approximately 30% to 50% of patients with oral tongue SCC have regional metastasis at diagnosis, but the limited sensibility of the current diagnostic methods used for neck staging does not allow detection of all cases, leaving a significant number of undiagnosed metastasis (occult lymph node metastasis). In this study, we evaluated whether clinicopathologic features and immunohistochemical detection of carcinoma-associated fibroblasts (CAFs) and activin A could be predictive markers for occult lymph node metastasis in oral tongue SCC.

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Cowden syndrome (CS) is an autosomal dominant genodermatosis that frequently affects several tissues with hamartomatous growth. The oral cavity is quite commonly involved with papillomatous lesions, which can be crucial to early diagnosis of this disease. In this series, 10 patients with a great diversity of manifestations associated with CS are presented, in whom oral papillomatosis was a constant and relevant finding to establish the diagnosis of CS.

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Antiresorptive osteonecrosis of the jaws (ARONJ) is a significant and poorly understood oral complication that may affect patients receiving antiresorptive agents, such as intravenous bisphosphonate therapy. There are scarce reports of the coexistence of ARONJ and metastasis at the same jaw site in the English-language literature. In the present case, a 60-year-old white woman was referred for the evaluation of a nonhealing extraction socket.

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