Foram confeccionados 50 corpos de prova, divididos em 30 próteses totais superiores e 20 bases de provas permanentes, padronizados, para se avaliar a alteração dimensional da base de prova permanente, com dupla polimerização, processada em forno de microondas convencional; base de prova permanente com dupla polimerização, processada no método convencional; e a prótese total em uma única polimerização. Para essa análise, essas próteses foram divididas em 5 grupos: grupo I – prótese total convencional – banho de água (controle); grupo II – base de prova permanente processada convencionalmente; grupo III – base de prova permanente processada em forno de microondas convencional; grupo IV – prótese total superior padronizada com base de prova permanente processada convencionalmente, com as bases do grupo II; grupo V – prótese total superior com base de prova permanente, processada no forno de microondas convencional, com as bases de prova do grupo III. Para avaliar essa alteração foi usado o recurso do scaneamento da região posterior das próteses, “Post-dam”, desses corpos de prova. Após esse processo, a imagem capturada foi levada para o programa Photoshop 8.0 determinando a região de avaliação. Após essa seleção, a imagem é acessada no CorelTrace 11 para ser transformada em preto e branco e vetorizada, sendo, então, levada para o CorelDraw 11 para ser feita a medição do espaço da região posterior, entre o modelo e a base de prova/prótese total, para permitir a análise dos valores da alteração dimensional dos corpos de prova em questão, após o processamento. Os resultados mostram que: 1) a diferença da variação média para os lados esquerdo, centro e direito, respectivamente, na ordem de décimos ou centésimos de milímetros, para o grupo IV e I (0,07; 0,08 e 0,09); para o grupo V e I (0,10; 0,32 e 0,25) e para o grupo V e IV (0,17; 0,24 e 0,16) não pode ser considerada relevante clinicamente para afetar o ajuste da prótese na boca e promover a ocorrência de maiores transtornos clínicos; 2) A alteração média das áreas do lado esquerdo e direito para o grupo I, II e IV obtiveram uma homogeneidade na alteração, diferindo os Grupos III e V em relação aos outros, não existindo porém, diferença significante a nível de 5% entre as áreas desses segmentos; 3) A análise da variância do índice da área dos cinco (5) grupos não apresentou resultado significante que desabonasse a utilização de qualquer um dos métodos para a confecção da prótese total. No entanto, mais estudos devem ser realizados com o intuito de se aprimorar o uso do forno de microondas para o processamentos da prótese. / The 50 samples of pattern maxillary complete denture were processed, divided in 30 maxillary complete denture and 20 permanent proof base, to evaluated of dimensional changes in the permanent proof base with twice polymerization, process in microwave oven, to compare with the others two groups, the complete denture with conventional process and the complete denture with permanent proof base with twice polymerization in a conventional process. To evaluated this complete dentures they were divided in 5 groups: group I – conventional complete denture; group II – proof base conventional process; group III – proof base in microwave process; group IV – complete denture using the proof base of the group, with the conventional process and the group; group V – complete denture using the proof base of the group III, microwave process. To evaluated this alteration used the scanner in the “Post-dam”, in this samples. After this proceding the image was putting in the Adobe Photoshop 8.0 program to determinate what region was evaluated. After this selection, the image access in the CorelTrace 11 program and transformed in black and white, and after to access in the CorelDraw 11 that was measured the region between the cast and the complete/permanent proof base, to allow the analysis of the values the dimensional alteration of the proof body, after the process. The results show: 1) The linear dimensional alteration the difference mean variation for the left, center and right sides, respectively, it was in decimal order or centesimal of millimeters, for the group IV and I (0,07; 0,08 and 0,09); and for the group V and I were (0,10; 0,32 and 0,25) and for the group V and IV (0,17; 0,24 and 0,16) and it cannot be considered clinically relevant to affect the prosthesis adjustment in the mouth, and promote the occurrence of more clinical disruptions; 2) The dimensional alterations in the areas (left and right side) of the proof bodies of the three groups I, II and IV were uniform, and the groups III and V weren’t homogeneous, but there is not a statically significant difference, about 5%, between the segment left and right areas; 3) The variation of the area index about five groups there is not a statically significant that couldn’t use of the both method to build the complete denture. Although, more studies are important to realize with the objective to improve the use the microwave over to process the denture.

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Problématique : L’édentement et les troubles du sommeil sont des affections chroniques fréquentes chez les personnes âgées et qui peuvent avoir des conséquences défavorables sur le bien-être de ces personnes, ainsi que sur leur qualité de vie. L’édentement pourrait perturber le sommeil par la modification de la structure crânio-faciale et des tissus mous environnants. Cependant, cette relation n'est pas suffisamment documenté. Objectifs : Le but de cette étude pilote était de préparer la mise en œuvre d’une étude clinique randomisée contrôlée concernant l’effet du port nocturne des prothèses complètes sur la qualité du sommeil. Méthodologie : Treize aînés édentés ont participé à cette étude clinique randomisée contrôlée de type croisé. L’intervention consistait à dormir avec ou sans les prothèses durant la nuit. Les participants à l'étude ont été assignés à porter et ne pas porter leurs prothèses dans des ordres alternatifs pour des périodes de 30 jours. La qualité du sommeil a été évaluée par la polysomnographie portable et le questionnaire Pittburgh Sleep Quality Index (PSQI). Les données supplémentaires incluent la somnolence diurne, évaluée par le questionnaire Epworth Sleepiness Scale (ESS), et la qualité de vie liée à la santé buccodentaire, évaluée par le questionnaire Oral Health Impact Profile 20 (OHIP-20). De plus, à travers les examens cliniques et radiologiques, les données des caractéristiques sociodémographiques, de la morphologie oropharyngée, des caractéristiques buccodentaires et des prothèses ont été recueillies. Les modèles de régression linéaire pour les mesures répétées ont été utilisés pour analyser les résultats. Résultats : L’étude de faisabilité a atteint un taux de recrutement à l’étude de 59,1% et un taux de suivi de 100%. Le port nocturne des prothèses dentaires augmentait l’index d'apnée-hypopnée (IAH) et le score PSQI par rapport au non port nocturne des prothèses : (IAH : Médiane = 20,9 (1,3 - 84,7) versus 11,2 (1,9 - 69,6), p = 0,237; le score PSQI : Médiane = 6,0 (3,0 - 11,0) versus 5,0 (1,0 - 11,0), p = 0,248). Cependant, ces différences n'étaient pas statistiquement significatives, sauf que pour le temps moyen d’apnée (plus long avec des prothèses) (p < 0,005) et le temps de ronflement relatif (moins élevé avec des prothèses) (p < 0,05). La somnolence diurne excessive et la qualité de vie liée à la santé buccodentaire étaient semblables pour les deux interventions (le score ESS : Médiane = 4,0 (3,0-10,0) versus 5,0 (2,0-10,0), p = 0,746; le score OHIP-20: Médiane = 31,0 (20,0-64,0) versus 27,0 (20,0-49,0), p = 0,670). L’impact néfaste du port nocturne des prothèses complètes sur le sommeil a été statistiquement significatif chez les personnes souffrant de l’apnée-hypopnée moyenne à sévère (p < 0,005). Conclusion : L’essai clinique pilote a montré que le port nocturne des prothèses complètes a un impact négatif sur la qualité du sommeil des gens âgés édentés, surtout chez les personnes avec l’apnée obstructive du sommeil modérée à sévère. Les résultats doivent être confirmés par l’étude clinique randomisée contrôlée de phase II. / Problem: Edentulism and sleep disturbance are common chronic conditions in older people and may have adverse consequences on well-being of these persons, as well as their quality of life. Indeed, edentulism can modify the craniofacial structure and surrounding soft tissue, and lead to sleep disturbance in edentate individuals. However, this relationship is not sufficiently documented. Objectives: The aim of this study was to prepare a pilot randomized controlled trial on the effect of nocturnal complete denture wear on sleep quality. Methods: Thirteen edentate elders participated in this randomized cross-over clinical trial. The intervention consisted of sleeping with or without dentures at night. The study participants were assigned to wear and not wear their denture in alternate orders for periods of 30 days. Sleep quality was assessed by portable polysomnography and the Pittsburgh Sleep Quality Index (PSQI). Additional data included: daytime sleepiness assessed by the Epworth Sleepiness Scale (ESS) and oral-health-related quality of life assessed by the Oral Health Impact Profile 20 (OHIP-20). Furthermore, through the clinical and radiographic examinations, data on sociodemographic, oropharyngeal morphology, and oral and prosthesis characteristics were gathered. Linear regression models for repeated measures were used to analyze the data. Results: The recruitment rate for this study was 59.1% and the follow-up rate was 100%. Sleeping with dentures resulted in higher apnea-hypopnea index (AHI) and higher PSQI score when compared with sleeping without dentures (AHI: Median = 20.9 (1.3-84.7) vs. 11.2 (1.9-69.6), p = 0.237; PSQI score: Median = 6.0 (3.0-11.0) vs. 5.0 (1.0-11.0), p = 0.248). However, these differences were not statistically significant, except for the mean apnea time (more with dentures) (p < 0.005) and the relative snoring time (less with dentures) (p < 0.05). Excessive daytime sleepiness and the oral-health-related quality of life were similar for two interventions (ESS score: Median = 4.0 (3.0-10.0) vs. 5.0 (2.0-10.0), p = 0.746; OHIP-20 score: Median = 31.0 (20.0-64.0) vs. 27.0 (20.0-49.0), p = 0.670). The negative impact of sleeping with complete dentures wear was statistically significant in individuals suffering from moderate and severe apnea-hypopnea index (p < 0.005). Conclusion: The pilot clinical trial showed that wearing complete dentures at night has negative effects on the sleep quality of edentate elders, especially in individuals with moderate and severe obstructive apnea sleep. The results need to be confirmed with phase-II randomized clinical trial.