Akademisk avhandling--Uppsala. / Extra t.p., with thesis statement, inserted. Bibliography: p. 73-76.

published_or_final_version / Dentistry / Master / Master of Dental Surgery

published_or_final_version / Dentistry / Master / Master of Dental Surgery

FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / O objetivo deste estudo foi verificar a presenÃa de parÃmetros morfolÃgicos maxilares na SÃndrome da ApnÃia Obstrutiva do Sono (SAOS) A amostra consistiu nos modelos de gesso da maxila de 23 indivÃduos (11 masculinos e 12 femininos) com diagnÃstico polissonogrÃfico de SÃndrome da ApnÃia Obstrutiva do Sono leve 34 indivÃduos (17 masculinos e 17 femininos) com sÃndrome moderada e 17 indivÃduos com sÃndrome grave (14 masculinos e 3 femininos) O grupo controle era composto por modelos de gesso da maxila de 50 jovens brasileiros de ambos os sexos com oclusÃo normal e sem indÃcios de SÃndrome da ApnÃia Obstrutiva do Sono Os resultados encontrados demonstraram que os parÃmetros morfolÃgicos da maxila avaliados nÃo apresentaram associaÃÃo com o Ãndice de apnÃia e hipopnÃia (IAH) mas ocorreram menores dimensÃes transversais da arcada dentÃria superior principalmente ao nÃvel de molares associado a um aumento da dessaturaÃÃo de oxi-hemoglobina (SaO2mÃn)IndivÃduos com SÃndrome da ApnÃia Obstrutiva do Sono tambÃm apresentaram dimensÃes transversais da maxila mais estreitas e maior profundidade do palato na regiÃo de prÃ-molares e molares quando comparados ao grupo controle / The objective of this study was to verify the presence of maxillary morphologic parameters on the Obstructive Sleep Apnea Syndrome (OSA) The sample was consisted on maxilla dental models of 23 individuals (11 males and 12 females) with the polyssonographic diagnosis of mild SAOS, 34 individuals (17 males and 17 females) with moderate SAOS and 17 individuals with severe SAOS (14 males and 3 females) Measures of maxilla dental models of 50 young Brazilians were used for the control group, both males and females and with normal occlusion and without any indication OSA The results found show that the maxillary morphologic parameters evaluated didnât show the association with the apnea/hypopnea index (AHI) but minor transversal dimensions of the maxilla mainly at the level of the molars associated to the increase of the dessaturation of oxyhemoglobin (minSaO2) The individuals with OSA also presented maxilla transversal dimensions narrower and more height on the palate at the region of pre-molars and molars when compared to the control group

Background Maxillary defects subsequent to hemimaxillectomy have long been restored with a pedicled temporalis flap. Recently,the trend towards maxillary reconstruction using vascularized bone free flaps and soft tissue free flaps has been gaining popularity. However, the value in terms of functional rehabilitation of these surgical modalities remains unconclusive. Objective To ascertain and compare masticatory performance and quality-of-life in patients with surgically reconstructed maxillectomy Class 2 (subtype A) defects by vascularized bone free flaps, vascularized soft tissue free flaps and pedicled soft tissue flaps. Methods Eighteen patients divided into 3 groups (4 vascularized bone flap, 5 vascularized soft tissue flap, 9 pedicled soft tissue flaps) were evaluated for functional outcome and qualityof-life (QoL). All patients were objectively assessed using masticatory comminution test. Subjective evaluation was conducted using functional outcomes questionnaire and patient reported speech perception. Self image and body perception were assessed using Body Esteem Scale. Overall quality-of-life was assessed using University of Washington QoL questionnaires. Results Patients reconstructed with vascularized bone flaps and vascularized soft tissue flaps showed superior masticatory performance compared to patients reconstructed with pedicled soft tissue flaps. Speech, facial attractiveness and overall QoL were similar for all three groups. Conclusions Maxillectomy class 2 (subtype A) patients show comparable speech, facial attractiveness and quality-of-life levels after reconstruction with vascularized bone flaps, vascularized soft tissue flaps and pedicled soft tissue flaps. However, those reconstructed with pedicled soft tissue flaps achieved lowest masticatory performances amongst the three surgical reconstruction modalities. Thus, the choice of recontruction for maxillectomy class 2 (subtype A) defects should be guided by minimizing surgical time and long term morbidity given the apparent similarity in functional outcomes. / published_or_final_version / Dental Surgery / Master / Master of Dental Surgery

Background Distraction osteogenesis (DO) was first applied on the human craniofacial skeleton in 1992 by McCarthy et al.1 who performed lengthening of the mandible in patients with hemifacial microsomia and Nager’s syndrome. Further advances in this field have since then led to the widespread use of this modality for the treatment of numerous congenital and acquired craniofacial skeletal anomalies. In 2001, a review by Swennen et al2 concluded that up to year 1999, this form of treatment was gaining intense popularity but that the main drawbacks included insufficient data on long term results and relapse. A systematic review of the last decade on functional outcomes and long term complications following distraction osteogenesis of the facial skeleton is presented. Methods A structured systematic literature search, with predefined inclusion and exclusion criteria from relevant computer databases and journals were performed. The journals were evaluated and critically appraised by 2 reviewers separately in 3 rounds. Papers were categorized according to the level of evidence, the quality of methodology and the specific field of functional outcomes and long term complications. Results were then categorized according to the type of distraction movements, ie maxillary advancement and mandibular lengthening. Results A total of 42 papers comprising of 16 studies for maxillary advancement and 26 studies for mandibular lengthening were included in this review. Maxillary advancement was found to be beneficial in patients with cleft maxillary hypoplasia in terms of achieving aesthetic outcome but the risk for velopharyngeal insufficiency remains uncertain. The achieved maxillary advancement was stable if performed on adult patients while a recurrence of midface retrusion was noted if DO was performed on growing patients. Overcorrection was recommended in these cases to an estimated value of 20-50%. Mandibular lengthening was 99% successful in relieving respiratory obstruction in patients with isolated Pierre Robin Sequence (PRS) or syndromic micrognathic infants preventing the need for tracheostomy in the long term, and in 89% successfully decannulating infants with pre-existing tracheostomy. However, feeding and growth outcomes after airway obstruction was relieved remain unknown due to lack of sufficient evidence. Unilateral mandibular DO was successful in achieving aesthetic symmetrical facial balance in patients with hemifacial microsomia however a total loss of corrected distraction length was noted by the end of growth period if DO was performed during growth. Conclusions DO achieved stable results in terms of lengthening the maxilla and mandible but was also noted to cause restricted growth potential of the distracted bone. Hence, the benefits of performing DO during active growth should be weighed against the likely need for a second surgery due to a growth deficit of distracted bone and future surrounding bone growth. However DO in adults remains an alternative to conventional orthognathic surgery and choice of treatment should be patient centred. / published_or_final_version / Dental Surgery / Master / Master of Dental Surgery

Diss. (sammanfattning) Göteborg : Göteborgs universitet, 2006. / Härtill 5 uppsatser.

Orientador: Sergio Roberto Peres Line / Dissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-15T16:18:21Z (GMT). No. of bitstreams: 1 Ribeiro_MarianaMartins_M.pdf: 3243931 bytes, checksum: d6fb7208f8b58921ce7badece04e363b (MD5) Previous issue date: 2010 / Resumo: A evolução dos primatas foi marcada por uma redução em tamanho das mandíbulas e maxilas acompanhada por uma redução geral de tamanho de dentes. Esta redução foi facilitada pela organização da dentição em módulos que são autônomos em função e evolução. Esta redução segue uma regra simples: quanto mais tardio o desenvolvimento do dente maior será sua redução. Modelos foram propostos para explicar as variações no padrão de dentição mamária, porém nenhum destes modelos leva em consideração o tamanho da mandíbula e maxila já que a falta de espaço parece ter gerado esta redução. O objetivo deste trabalho é desenvolver um modelo novo que considera o espaço disponível medindo o palato e área e comprimento de molares. Neste estudo foram medidas 85 maxilas de primatas e os dados submetidos a análises estatísticas. Este estudo além de prover um modelo que pode estimar o tamanho de cada molar e tamanho de palato secundário em primatas também salienta algumas tendências observadas nos primatas estudados como, por exemplo, a presença de um terceiro pré-molar em alguns primatas e a grande variação de tamanho do terceiro molar / Abstract: The primate evolution was marked by a reduction in size of the jaws accompanied by a general reduction of teeth size. This reduction was facilitated by the organization of the dentition into modules that are autonomous in function and evolution. This reduction follows a simple rule: the later the tooth develops the greater will be its reduction. Models have been proposed to explain the variations in the pattern of mammalian dentition however none of these models takes into account the jaws size, since the lack of space seems to have triggered this reduction. The aim of this paper is to develop a new model that considers the space available by measuring the palate and molars area and length. In this study 85 upper jaws of primates were measured and statistical analysis was carried out with the data. This study not only provides a model that can estimate the size of each molar and secondary palate in primates but also points out some trends observed in the primates studied as, for instance, the presence of a third premolar in some primates and the great variation in size of the third molar / Mestrado / Histologia e Embriologia / Mestre em Biologia Buco-Dental

Thesis (M.S.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains v, 49 p. Includes abstract. Includes bibliographical references (p. 37-49).

published_or_final_version / Dentistry / Master / Master of Dental Surgery