1,720,963 research outputs found
CAD/CAM and Maxillary Obturators in Head and Neck Cancer Patients: A Review
No full textIntroductionObturator prostheses and removable prostheses still represent a valid option in head and neck cancer patients. The aim of the present article is to briefly review the current literature about the use of a digital workflow in the intraoral prosthetic rehabilitation of head and neck cancer patients.MethodsThe review included articles in English published from January 2010 to February 2023. Articles regarding patients who had undergone head and neck cancer treatment and intraoral prosthetic rehabilitation by a CAD-CAM techniques in at least 1 of the prosthetic treatment stages (scanning, design, and/or fabrication) were included.ResultsNineteen articles with 72 described patients met the inclusion criteria and were included. Three types of removable prosthetic treatments were reported: 52 maxillary obturators, 19 provisional maxillary obturators, and 1 maxillary complete denture. As for 3-dimensional image capture, the most common method was intraoral scanner, followed by conventional CT scan. As for prosthetic procedures, all treatments incorporated at least a digital workflow in 1 of the stages, either in design or fabrication. Concerning the CAM phase, definitive cast printing was performed in 69 patients. Only 3 patient was rehabilitated by using a completely digital workflow.ConclusionsA completely digital workflow was rarely used in the intraoral prosthetic rehabilitation of patients with head and neck cancer. The reduced laboratory working time, the avoidance of the risk of aspiration of impression materials, and the possibility of performing an adequate digital impression in spite of the trismus are important advantages associated with the digital workflow
Hemangiolymphangioma of the buccal mucosa in a 44-year-old patient, a case-report and literature review of the condition
No full textKissing molars
No full textOBJECTIVES "Kissing molars" are impacted teeth that contact each other with occlusal surfaces in a single follicular space and with their roots pointing in opposite directions. In some cases you can see the molars "kissing" but the etiology of this phenomenon is still unknown. The aim of this article is to show the diagnosis of a rare case of kissing molars and discuss the etiology and treatment. MATERIALS AND METHODS A case of kissing molars is presented. RESULTS AND DISCUSSION Most commonly, this phenomenon involves the mandibular third and second molars; however, other teeth are known to be involved, such as a supernumerary mandibular third and fourth molar. The etiology of kissing molars is still unknown. According to some theories, an ectopic tooth germ would be responsible and the first cystic development around a molar could cause the crowns of the involved teeth to move; however, a role in cases of associated mucopolysaccharidosis or hyperplastic dental follicles has also been suggested. CONCLUSIONS The decision to extract asymptomatic kissing molars is controversial among oral surgeons. Various surgical complications may arise; on the other hand, in some cases surgery is unavoidable. CLINICAL SIGNIFICANCE This phenomenon may be a sign of various medical conditions that may require further investigation
Molecular pathways of odontogenic keratocysts: A systematic review
Full text linkObjective: This systematic review aims to identify the molecular aspects of odontogenic keratocysts that have been elucidated to date. Methods: The odontogenic keratocyst (OKC) stands out as one of the most prevalent odontogenic tumors. Since its initial description, numerous studies have delved into various aspects of this lesion, aiming to unravel its distinctive biological behavior. Results: Recent investigations have speci cally focused on the molecular aspects of OKC, shedding light on its biological characteristics. Substantial differences at the molecular level between OKC and other odontogenic cystic lesions indicate a distinct biological origin. Genetic and molecular research in the realm of odontogenic tumors, particularly OKC, has contributed signi cantly to the growing knowledge and understanding of their physiopathological pathways. Conclusion: The molecular ndings may open non-surgical, pharmaceutical options for treatment
The surgical management of triple mandibular fractures: A challenging task
Full text linkBackground: The treatment of multiple mandibular fractures may often be challenging. The aim of this study was to evaluate the characteristics and outcomes of multiple mandibular fractures, with a focus on triple mandibular fractures. Material and Methods: Patients with multiple (triple) mandibular fractures were included. The following data were recorded for each patient: age; gender; cause of injury; sites of mandibular fractures; presence of complications. Facial width was esthetically evaluated through a clinical examination considering the inferior facial width, postoperative asymmetries, and facial esthetic harmony. Results: From January 1, 2010, to December 31, 2018, 25 patients (15 men, 10 women) underwent surgery for triple mandibular fractures and were included in the study. A predominance of symphysis/parasymphysis fracture associated with bilateral condylar/ramus fractures was observed, followed by symphysis/ parasymphysis fracture combined with mandibular angle fracture and condyle fracture. Most patients did not show any type of complications. An optimal esthetic outcome was obtained in 20 patients. Conclusions: A successful treatment of trifocal mandibular fractures may be achieved by different techniques, although it remains challenging. The re-establishment of the transversal bigonial dimension by a correct reconstruction of the mandibular arch should guide surgeons. The aim of the treatment should always be the successful rehabilitation of patients’ pretraumatic occlusion and function
Extraction of third molar at risk of mandibular pathological fracture
No full textOBJECTIVES The purpose of this article is to present and discuss the surgical management of a deeply impacted mandibular third molar associated with a follicular cyst. MATERIALS AND METHODS A 58-year-old woman with a negative anamnestic medical history for pathologies, smoking or drugs, was referred by her treating dentist to the Division of Maxillofacial Surgery, University of Novara (Italy), for the management of a cyst associated with a right third molar deeply impacted in the mandible. No signs of infection or dehiscence were observed during an intra-oral clinical examination. A panoramic radiograph showed that the mandibular left third molar was deeply impacted near the lower border of the mandible; it was surrounded by a well-circumscribed radiolucency. The diagnostic hypotheses formulated mainly included follicular cyst or odontogenic keratocyst. However, it was not possible to exclude other rarer conditions such as unicameral ameloblastoma. Treatment options considered included a first incisional biopsy or excision of the growth with simultaneous extraction of the impacted molar. In view of the unique and well-circumscribed nature of the transparent lesion, the authors opted for excision with simultaneous extraction of the impacted molar. RESULTS AND DISCUSSION Surgical extraction of deeply impacted mandibular third molars can be challenging, as several possible risks may be associated with it. Mandibular fracture during or after third molar extraction is an important although rare complication. Several factors predisposing to mandibular fracture must be considered and kept in mind: adult age, male sex, deep occlusion, dental ankylosis and associated bone pathology. CONCLUSIONS In third molar surgery, adequate surgical expertise is mandatory to ensure careful evaluation and technique. A comprehensive pre-operative analysis of the frequency of different risk factors related to mandibular fractures occurring after third molar removal is required. CLINICAL SIGNIFICANCE The authors suggest informing patients of the most common possible risks and complications. Scrupulous oral hygiene and a soft diet are recommended for up to 30 days after the removal of an included lower third molar
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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