Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-23T00:10:43Z No. of bitstreams: 1 ZilaneSilvaBarbosaDeOliveira_DISSERT.pdf: 8955616 bytes, checksum: 7f6cba42b11053b1d3ebf17eaec36bca (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-23T00:30:27Z (GMT) No. of bitstreams: 1 ZilaneSilvaBarbosaDeOliveira_DISSERT.pdf: 8955616 bytes, checksum: 7f6cba42b11053b1d3ebf17eaec36bca (MD5) / Made available in DSpace on 2016-08-23T00:30:27Z (GMT). No. of bitstreams: 1 ZilaneSilvaBarbosaDeOliveira_DISSERT.pdf: 8955616 bytes, checksum: 7f6cba42b11053b1d3ebf17eaec36bca (MD5) Previous issue date: 2015-08-05 / O objetivo desse estudo prospectivo foi comparar a dor, o edema, os movimentos mandibulares, a efici?ncia mastigat?ria e a qualidade de vida, nos primeiros 60 dias de p?s-operat?rio, utilizando 2 diferentes protocolos cl?nicos para recupera??o miofuncional, em pacientes que se submeteram ? cirurgia ortogn?tica. Esse estudo consistiu de 19 pacientes , onde o grupo controle foi composto por 10 pacientes que n?o tiveram a reabilita??o fonoaudiol?gica e do grupo experimental participaram 9 pacientes que receberam o protocolo de reabilita??o fonoaudiol?gica. As vari?veis dor, edema e movimentos mandibulares foram analisadas 48h, 96h, 7 dias, 14 dias , 30 e 60 dias p?s cir?rgicos. A efici?ncia mastigat?ria foi classificada com 60 dias de p?s operat?rio e a qualidade de vida foi verificada com 60 dias e 6 meses ap?s a cirurgia. Os dados foram submetidos ? an?lise de vari?ncia, teste t de Student e de independ?ncia de Fisher , em n?vel de 5% de probabilidade . Identificou-se que os pacientes do grupo experimental n?o obtiveram melhora mais r?pida nos par?metros de dor, edema, movimentos mandibulares e efici?ncia mastigat?ria quando comparados com os pacientes do grupo controle, com exce??o dos valores da percep??o de dor , que foi reduzido nos primeiros quatorze dias de acompanhamento no grupo experimental. O impacto na qualidade de vida n?o mostrou resultados diferentes estatisticamente significantes entre os dois grupos. Conclui-se que o protocolo de reabilita??o fonoaudiol?gica utilizado para os pacientes desse estudo n?o obteve resultados mais r?pidos de recupera??o p?s cir?rgica que o protocolo controle. / The objective of this randomized, blind and prospective clinical trial was to compare the pain, the edema, the mandibular movements, the masticatory efficiency and life quality, in the first 60 days after surgery using 2 different clinical protocols for myofunctional recovery, in patients who underwent orthognathic surgery. A sample of 19 patients was used and divided into 2 groups. The control group (CG) consisted of 10 patients who had postoperative rehabilitation guided by a standard protocol, conducted by the Service of Surgery and Traumatology Oral and Maxillofacial. In other hand, the experimental group (EC) totaled 9 patients who received the speech therapy rehabilitation protocol specialized, by professionals in the area. The variables pain, edema and mandibular movements were analyzed during 48h, 96h, 7 days, 14 days, 30 and 60 days post-surgery. The masticatory efficiency and the quality of life were classified with 60 days after surgery . The data were submitted an analysis of variance, Student's t-test and Fisher's independence, at the level of 5% probability. It was identified that patients of GE have benefited in the first 14 days(p<0,001), as they have had reported less pain than those in the CG. Significant statistics differences between groups for pain parameters (after 14 days) (p=0,065), edema(p=0,063), mandibular movements(p=0,068), masticatory efficiency(p=0,630) and the impact on quality of life (p=0,813) were not observed on this study. The speech therapy protocol for myofunctional recovery (EG), although it has not obtained statistical results superiors than the CG in the general context, presents itself as a viable alternative to conventional therapy assumed by many maxillofacial surgeons, allowing the surgeon to optimize time with patients in the period postoperatively.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-07-04T14:11:56Z No. of bitstreams: 1 FranciscoDeAssisDeSouzaJunior_DISSERT.pdf: 1244532 bytes, checksum: 8bcfcee2c92ee6929610418692f1d8fe (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-07-13T15:24:01Z (GMT) No. of bitstreams: 1 FranciscoDeAssisDeSouzaJunior_DISSERT.pdf: 1244532 bytes, checksum: 8bcfcee2c92ee6929610418692f1d8fe (MD5) / Made available in DSpace on 2017-07-13T15:24:01Z (GMT). No. of bitstreams: 1 FranciscoDeAssisDeSouzaJunior_DISSERT.pdf: 1244532 bytes, checksum: 8bcfcee2c92ee6929610418692f1d8fe (MD5) Previous issue date: 2016-08-09 / Mudan?as nos segmentos maxilo mandibulares s?o executadas apenas depois da predic??o dos movimentos cir?rgicos atrav?s da an?lise cefalom?trica e determina??o esperada do posicionamento ideal dos tecidos faciais duros e moles. O objetivo deste estudo foi avaliar a correla??o entre o movimento do tecido duro no tecido mole no sentido antero ? posterior utilizando LVV como uma refer?ncia, em pacientes submetidos ? cirurgia ortogn?tica. A amostra consistiu em analisar 54 radiografias de 27 pacientes (09 do sexo masculino e 18 do sexo feminino) com idade m?dia de 29 anos. Os estudos de imagem foram realizados antes e 6 meses ap?s a cirurgia ortogn?tica. Nove pontos (PALS, PALI, Pg?, EST, PA, PB, Pg, PAICS e PAICI) foram marcados e medidos em rela??o a LVV usando um software, Meazure 2.0. O sexo masculino, apesar de representar 33.3 % da nossa amostra, tiveram movimentos mais significantes comparando pr? e p?s (PALI ? LVV, PAICI ? LVV, PALI ? EST; p<,005) em rela??o ao sexo feminino. Mudan?as no PAICI n?o alteram significativamente as proje??es do PALS (? = ,232; p = ,244), mas altera de forma significativa a posi??o do PAICS (? = , 546; p = ,003) e do PALI (? =, 502; p = ,008). Altera??es no PAICS provocaram altera??es significantes no ter?o inferior em pontos como PB (? = ,462; p = ,015), PALI (? = ,383; p = ,049), Pg? (? = ,498; p = ,008) , Pg (? = ,426; p = ,027) e PAICI (? = ,667; p < ,001). J? maior m?dia de movimento do tecido mole foi a espessura do l?bio inferior (PALI ? EST) com 1,14mm de movimento (p < 0,05). A maior altera??o de movimento registrada para a espessura labial inferior foi em um avan?o mandibular de 5,9mm juntamente com recuo maxilar de 4,5mm. A propor??o do movimento mandibular e maxilar para este ponto ? de 1: 0.65 e 1:0.3, respectivamente. Para o tecido duro o PAICI obteve a maior m?dia de movimento em rela??o ? LVV, sendo: 1,37mm (p = ,163). Sendo assim, conclui-se que a espessura labial inferior n?o acompanham em correla??o significativas altera??es na proje??o dos l?bios inferiores e superiores. Movimentos no PAICI n?o alteram de forma significativa as proje??es do PALS, mas altera a posi??o do PAICS. Movimentos nos PAICS provocam altera??es mais significativas no ter?o inferior e para se fazer avalia??es de predic??es dos pontos de tecido mole s?o necess?rios avaliarem no m?nimo tr?s pontos correlatos no mesmo segmento. / Changes in maxillary mandibular segments are performed only after prediction of surgical movements through cephalometric analysis and expected determination of optimal positioning of hard and soft facial tissues. The objective of this study was to evaluate the correlation between the movement of soft tissue in the anteroposterior direction using TVL as reference in patients submitted to orthognathic surgery. The sample consisted of analyzing 54 radiographs of 27 patients (09 males and 18 females) with a mean age of 29 years. Imaging studies were performed before and 6 months after orthognathic surgery. Nine points (PALS, PALI, Pg ', EST, PA, PB, Pg, PAICS and PAICI) were labeled and measured against TVL using a Meazure 2.0 software. Males, although representing 33.3% of our sample, had more significant movements comparing pre and post (PALI - LVV, PAICI - LVV, PALI - EST, p <.005) in relation to the female sex. Changes in the PAICI do not significantly change the PALS projections (? =, 232; p =, 244), but significantly change the position of the PAICS (? =, 546; p =, 003) and PALI (? =, 502 ; P = 0.008). Changes in PAICS caused significant changes in the lower third in points such as PB (? =, 462, p =, 015), PALI (? =, 383; p =, 049), Pg '(? =, 498; ), Pg (? =, 426, p =, 027) and PAICI (? =, 667, p <.001). Already higher mean soft tissue movement was the thickness of the lower lip (PALI - EST) with 1.14 mm of movement (p <0.05). The greatest change in movement recorded for the lower lip thickness was in a mandibular advancement of 5.9 mm along with a maxillary recoil of 4.5 mm. The ratio of mandibular and maxillary movement to this point is 1: 0.65 and 1: 0.3, respectively. For the hard tissue PAICI obtained the highest mean of movement in relation to LVV, being: 1.37mm (p =, 163). Therefore, it is concluded that the lower lip thickness does not accompany significant changes in the projection of the lower and upper lips. Movements in the PAICI do not significantly alter the PALS projections, but change the position of the PAICS. Movements in PAICS cause more significant alterations in the lower third and to make evaluations of predictions of soft tissue points it is necessary to evaluate at least three correlated points in the same segment.

Submitted by PPG Odontologia (odontologia-pg@pucrs.br) on 2018-03-19T17:16:06Z No. of bitstreams: 1 FERNANDO_DE_OLIVEIRA_ANDRIOLA_DIS.pdf: 1889802 bytes, checksum: 4fbb8e2e462022c1c29eeda8628a848b (MD5) / Approved for entry into archive by Tatiana Lopes (tatiana.lopes@pucrs.br) on 2018-04-03T16:47:33Z (GMT) No. of bitstreams: 1 FERNANDO_DE_OLIVEIRA_ANDRIOLA_DIS.pdf: 1889802 bytes, checksum: 4fbb8e2e462022c1c29eeda8628a848b (MD5) / Made available in DSpace on 2018-04-03T16:52:03Z (GMT). No. of bitstreams: 1 FERNANDO_DE_OLIVEIRA_ANDRIOLA_DIS.pdf: 1889802 bytes, checksum: 4fbb8e2e462022c1c29eeda8628a848b (MD5) Previous issue date: 2018-01-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq / The purpose of this study was to evaluate cervical lordosis and head posture changes using lateral cephalographs after bimaxillary orthognathic surgery for mandibular prognatism by null hypothesis. Twenty-five patients with skeletal class III dentofacial deformities (10 men, 15 women; mean age, 29.28 ? 8.22 years; range 18-48 years) were included in this prospective clinical study. Lateral cephalographs were taken in natural head position (NHP) 2 weeks before and 6 months after orthognathic surgery. The reproducibility of the radiographer?s technique of taking radiographs in NHP was investigated using a photographic method and found to be acceptable. All measurements for cervical lordosis (CV1/CV2; CV3/CV7; CV1/CV7), head posture (NSL/OPT; NSL/VER) and other cephalometric values (NSL/Go-Gn; NSL/Ocl; Overjet) were repeated three times by the same investigator at 2- week intervals and the average values of the three measurements were calculated to use in statistical analysis. Intraclass correlation coefficients (ICC) ranged between 0.996 to 1.000, demonstrating a high reliability of the measures. Statistically significant differences were found for CV3/CV7 (P=0.006) and CV1/CV7 (P=0.005) and no significant differences were identified in head posture for both cranio-cervical and cranio-vertical angles. The null hypothesis was rejected. Orthognathic surgery resulted in significant cervical lordosis extension, and a tendency for head extension could also be observed. / O objetivo deste estudo foi avaliar, por hip?tese nula, a lordose cervical e as altera??es da postura da cabe?a usando telerradiografias de perfil ap?s cirurgia ortogn?tica bimaxilar para corre??o de prognatismo mandibular. Vinte e cinco pacientes com deformidades dentofaciais esquel?ticas classe III (10 homens, 15 mulheres, idade m?dia entre 29,28 ? 8,22 anos, intervalo de 18-48 anos) foram inclu?dos neste estudo cl?nico prospectivo. As radiografias laterais dos pacientes foram obtidas na posi??o natural de cabe?a (PNC) 2 semanas antes e 6 meses ap?s a cirurgia ortogn?tica. A reprodutibilidade da t?cnica do radiologista para realizar as tomadas radiogr?ficas na PNC foi investigada usando um m?todo fotogr?fico e considerada aceit?vel. As medidas para lordose cervical (CV1/CV2; CV3/CV7; CV1/CV7), postura da cabe?a (NSL/OPT; NSL/VER) e outros valores cefalom?tricos (NSL/Go-Gn; NSL/Ocl; Overjet) foram repetidas tr?s vezes pelo mesmo investigador em intervalos de 2 semanas e os valores m?dios das tr?s medidas foram calculados para serem usados na an?lise estat?stica. Os coeficientes de correla??o intraclasse (ICC) variaram entre 0,996 e 1,000, demonstrando uma alta confiabilidade das medidas. Foram encontradas diferen?as estatisticamente significativas para CV3/CV7 (P=0,006) e CV1/CV7 (P=0,005). N?o foram identificadas diferen?as significativas na postura da cabe?a para os ?ngulos cr?nio-cervical e cr?niovertical. A hip?tese nula foi rejeitada. A cirurgia ortogn?tica resultou em aumento significativo da lordose cervical (extens?o) e tamb?m em uma tend?ncia ? extens?o da postura da cabe?a.

Made available in DSpace on 2014-12-17T15:43:53Z (GMT). No. of bitstreams: 1 AnaHFS_DISSERT.pdf: 2163097 bytes, checksum: 7e785f26b11bc3f97db1385b2a2e0537 (MD5) Previous issue date: 2013-04-22 / In the last decade, an increasing number of studies focusing on the impact of oral deformities on quality of life have been published. However, the evaluation of patients at different phases of the treatment has not been performed. Therefore, the purpose of this study was to determine the impact that dentofacial deformities have on patients` quality of life, as well as the influence exerted by social, economic, demographic and orthodontic factors, type and severity of malocclusion. A bicentric study - of the cross-sectional type of repeated panels - involving two cities - Natal and Rio de Janeiro - was carried out. A total of 227 patients participated in the study: 71 patients in the initial phase of the treatment (before any orthosurgical procedure), 115 patients in the pre-surgical (with braces) phase and 41 patients in the postoperative phase. The quality of life was measured using the Orthognatic Quality of Life Questionnnaire - OQLQ, translated and validated into Portuguese. The normative and aesthetic need for treatment was assessed with the Index of Orthodontic Treatment Need (IOTN) and the Dental Aesthetic Index (DAI); the social, economic and demographic factors, the type of service and malocclusion were also assessed. The data were analyzed through &#967;2/ Fisher`s exact test to seek the association between the nominal categorical variables in the three phases of treatment, Mann Whitney and Kruskal-Wallis test for gauging the existence of significant differences between two and three groups regarding each domain of OQLQ, respectively. For all tests, it was adopted a significance level of 5%. There was a statistically significant difference (p <0.001) in the general scores of OQLQ and in the domains of social aspects, facial aesthetics and oral function, when the "postoperative group" was compared to the "initial" and "orthodontic preparation" groups. Women, single, aged between 31 and 59 and living in Natal had the greatest impact on quality of life among patients in the "orthodontic preparation" group. Only the variable "income" (2 to 3 minimum wages), for the "initial" group, and gender (female) for the "postoperative" group, showed significant association with quality of life. The normative variable IOTN (DHC and AC) showed significant association with the OQLQ for the "initial" group, and the IOTN-AC-auto in the group of orthodontic preparation, being less important to women. We conclude that the ortho-surgical therapy has positive effects on quality of life after orthognathic surgery / Na ?ltima d?cada, um n?mero crescente de estudos enfocando o impacto de deformidades orais na qualidade de vida t?m sido publicados,. No entanto, a avalia??o de pacientes em fases distintas do tratamento n?o tem sido realizada. Sendo assim, o prop?sito deste estudo foi determinar o impacto que as deformidades dentofaciais t?m sobre a de qualidade de vida dos pacientes, bem como a influ?ncia exercida por fatores s?cio-econ?mico-demogr?ficos e ortod?nticos, tipo e severidade da oclusopatia. Foi feito um estudo bic?ntrico, envolvendo duas cidades, Natal e Rio de Janeiro, do tipo transversal de pain?is repetidos. Um total de 227 pacientes participaram do estudo: 71 pacientes na fase inicial de tratamento (antes de qualquer procedimento orto-cir?rgico), 115 pacientes na fase pr?-cir?rgica (com aparelho ortod?ntico) e 41 pacientes na fase p?s-cir?rgica. A qualidade de vida foi mensurada utilizando o Question?rio de Qualidade de Vida para Pacientes Orto-Cir?rgicos (Orthognatic Quality of Life Questionnnaire OQLQ), traduzido e validado para o Portugu?s. A necessidade normativa e est?tica de tratamento foi avaliada atrav?s dos ?ndice de Necessidade de Tratamento Ortod?ntico (IOTN) e do ?ndice de Est?tica Dental (DAI). Tamb?m foram avaliados os fatores s?cio-econ?mico-demogr?ficos, de acordo com o question?rio de classifica??o econ?mica do SB-Brasil, 2010, tipo de servi?o e principais problemas oclusais. Os dados foram analisados atrav?s do teste qui-quadrado/exato de Fisher para buscar a associa??o entre as vari?veis categ?ricas nominais nas tr?s fases de tratamento, teste de Mann Whitney e Kruskal-Wallis para aferirem a exist?ncia de diferen?a significativa entre dois e tr?s grupos em rela??o a cada um dos dom?nios do OQLQ, respectivamente. Para todos os testes foi adotado um n?vel de signific?ncia de 5%. Houve diferen?a estatisticamente significativa (p<0,001) nos escores gerais do OQLQ, e nos dom?nios aspectos social, est?tica facial e fun??o oral, quando o grupo p?s cir?rgico foi comparado aos grupos inicial e de preparo ortod?ntico. As mulheres, solteiras, com idade entre 31 e 59 anos, residentes em Natal, apresentaram maior impacto na qualidade de vida entre os pacientes do grupo de preparo. Apenas a vari?vel renda ( de 2 a 3 sal?rios m?nimos), para o grupo inicial e g?nero (feminino) para o p?s-cir?rgico, apresentaram associa??o significativa com a qualidade de vida, sendo a mesma pior nas duas situa??es. A vari?vel normativa IOTN ( DHC e AC) apresentou associa??o significativa com o OQLQ no grupo inicial e o IOTN-AC-auto no grupo de preparo ortod?ntico. Sendo assim, observase que a terapia orto-cir?rgica tem efeitos positivos na qualidade de vida ap?s a cirurgia ortogn?tica, efeitos esses menos pronunciados nas mulheres

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T23:22:20Z No. of bitstreams: 1 GleyssonMatiasDeAssis_DISSERT.pdf: 1359858 bytes, checksum: fe9b88f922668d56c2a5d194da819485 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-12T00:40:00Z (GMT) No. of bitstreams: 1 GleyssonMatiasDeAssis_DISSERT.pdf: 1359858 bytes, checksum: fe9b88f922668d56c2a5d194da819485 (MD5) / Made available in DSpace on 2017-04-12T00:40:00Z (GMT). No. of bitstreams: 1 GleyssonMatiasDeAssis_DISSERT.pdf: 1359858 bytes, checksum: fe9b88f922668d56c2a5d194da819485 (MD5) Previous issue date: 2017-02-10 / O objetivo deste trabalho foi de avaliar, atrav?s de um ensaio mec?nico, a resist?ncia da fixa??o na osteotomia sagital do ramo mandibular (OSRM) em tr?s diferentes movimentos de avan?o mandibular, bem como a influ?ncia do movimento associado a rota??o hor?rio do plano mandibular, utilizando miniplacas (4 e 6 elos) e parafusos com 6 mm de comprimento, do sistema 2.0 mm (Egimplan? ). Dois tipos de avan?os foram empregados (6 e 12 mm), utilizando hemimand?bulas de poliuretano com OSRM padronizadas de f?brica, divididos em 5 grupos: G1(Teste 1) - avan?o linear de 6 mm/ 1 placa e 4 parafusos; G2 (Teste 2) - avan?o linear de 12 mm/1 placa e 4 parafusos; G3 (Teste 3)- avan?o linear de 12 mm /2 placas e 8 parafusos; G4 (Teste 4) - avan?o de 12 mm, associado a rota??o hor?ria do plano mandibular(15?) / 1 placa e 4 parafusos; G5 (Teste 5) - avan?o de 12 mm, associado a rota??o hor?rio do plano mandibular(15?)/2 placas e 8 parafusos. As hemimand?bulas foram submetidas a uma carga compressiva vertical na regi?o de primeiro molar e a for?a aplicada, em Newtons, foi registrada nos deslocamentos de 1mm, 5 mm e 10 mm, como tamb?m a for?a m?xima aplicada entre 1 e 10 mm. Utilizando um intervalo de confian?a de 95%, as m?dias de for?a foram obtidas e os grupos foram comparados entre si. Os testes estat?sticos utilizados foram o Kruskal-Wallis* para a an?lise de todos os grupos e o de Mann-Whitney** para o comparativo de dois grupos em separado. Os resultados mostraram que o grupo G3 apresentou m?dias de for?a maiores (p < 0,001*), sendo, portanto, o mais resistente entre os grupos. Quando foi utilizado apenas 1 placa para a fixa??o da hemimandibula, no avan?o de 12 mm, a realiza??o da rota??o hor?ria foi mais resistente do que no movimento linear, nos deslocamentos de 1, 5 e 10 mm (p< 0,05**), n?o resultando em diferen?a estat?stica apenas no deslocamento m?ximo (p= 0,112**). Em um grande avan?o (12mm) houve uma perda de resist?ncia importante na fixa??o, sendo necess?rio compensar essa situa??o com uso de mais fixa??o e a rota??o hor?rio nesses casos tamb?m acrescentaram resist?ncia na OSRM, apenas nos casos em que se utiliza uma ?nica placa. / The objective of this study was to evaluate by means of mechanical testing the fixation strength in sagittal split ramus osteotomy (SSRO) for three different movements of mandibular advancement, as well as the influence of movement associated with clockwise rotation of the mandibular plane, using miniplates (4 and 6 holes) and 6-mm screws of the 2.0 mm system (Engimplan?). Two types of advancement were employed (6 and 12 mm) using polyurethane hemimandibles with factory-standardized SSO, divided into five groups: G1 (test 1) ? linear advancement of 6 mm/1 plate and 4 screws; G2 (test 2) ? linear advancement of 12 mm/1 plate and 4 screws; G3 (test 3) ? linear advancement of 12 mm/2 plates and 8 screws; G4 (test 4) ? advancement of 12 mm associated with clockwise rotation of the mandibular plane (15?)/1 plate and 4 screws; G5 (test 5) ? advancement of 12 mm associated with clockwise rotation of the mandibular plane (15?)/2 plates and 8 screws. The hemimandibles were submitted to a vertical compressive load in the region of the first molar and the force applied (in Newton) was recorded for displacements of 1, 5 and 10 mm, as was the maximum force applied between 1 and 10 mm. Using a 95% confidence interval, the mean force values were obtained and compared between groups. The Kruskal-Wallis* test was used for analysis of all groups and the Mann-Whitney** test for the comparison of two groups. The results showed higher mean force values for G3 (p < 0.001*), which was therefore the treatment that provided the greatest strength. When only 1 plate was used for fixation of the hemimandible, in the advancement of 12 mm, clockwise rotation resulted in a greater fixation strength than the linear movement for displacements of 1, 5 and 10 mm (p < 0.05**), with no significant difference being observed only for the maximum displacement (p = 0.112**). Important loss of strength in fixation was observed for the large advancement (12 mm) and it was necessary to compensate this situation with the use of more fixation. Clockwise rotation added strength to the SSO only in cases in which a single plate was used.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-05T00:11:27Z No. of bitstreams: 1 VictorDinizBorboremaDosSantos_DISSERT.pdf: 2006909 bytes, checksum: bac53377cdf34bb2c1b4d10fc273d846 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-16T21:50:04Z (GMT) No. of bitstreams: 1 VictorDinizBorboremaDosSantos_DISSERT.pdf: 2006909 bytes, checksum: bac53377cdf34bb2c1b4d10fc273d846 (MD5) / Made available in DSpace on 2017-10-16T21:50:04Z (GMT). No. of bitstreams: 1 VictorDinizBorboremaDosSantos_DISSERT.pdf: 2006909 bytes, checksum: bac53377cdf34bb2c1b4d10fc273d846 (MD5) Previous issue date: 2017-07-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo deste trabalho foi avaliar, atrav?s de um ensaio biomec?nico a resist?ncia da fixa??o na osteotomia sagital do ramo mandibular (OSRM) em dois tipos de avan?os (6 e 12 mm), associados ou n?o a rota??o do plano oclusal, utilizando placas e parafusos do sistema 2.0 mm. Foram utilizadas hemimand?bulas de poliuretano, com OSRM padronizadas, divididos em 7 grupos: Avan?o linear de 6 mm / 1 placa e 4 parafusos (G1); avan?o linear de 12 mm/1 placa e 4 parafusos (G2); avan?o linear de 12 mm /2 placas e 8 parafusos (G3); avan?o de 12 mm, associado a rota??o hor?ria do plano oclusal / 1 placa e 4 parafusos (G4); avan?o de 12 mm, associado a rota??o hor?rio do plano oclusal/2 placas e 8 parafusos (G5); avan?o de 12 mm, associado ao giro anti-hor?rio do plano oclusal / 1 placa e 4 parafusos (G6); - avan?o de 12 mm, associado ao giro anti-hor?rio do plano oclusal/2 placas e 8 parafusos (G7). As hemimand?bulas foram submetidas a uma carga compressiva vertical na regi?o de primeiro molar e a for?a aplicada, em Newtons, foi registrada nos deslocamentos de 1mm, 5 mm e 10 mm, bem como tamb?m a for?a m?xima. Utilizando um intervalo de confian?a de 95%, as medianas de for?a foram obtidas e os grupos foram comparados entre si. Os testes estat?sticos utilizados foram o Kruskal-Wallis* para a an?lise de todos os grupos e o de Mann-Whitney** para o comparativo de dois grupos separadamente. Os resultados mostraram que, segundo o teste de Kruskall-Wallis houve diferen?as entre os grupos. Ficou demonstrado que o aumento da magnitude do avan?o mandibular diminuiu a resist?ncia da osteoss?ntese na OSRM quando se utilizou um ?nico dispositivo de fixa??o. A inser??o de uma placa adicional em grandes avan?os (G3, G5 e G7), aumentou significativamente a resist?ncia do m?todo de osteoss?ntese de uma maneira geral, quando comparada aos demais grupos. Em grandes avan?os com modifica??o do plano oclusal fixados com uma ?nica placa (G4 e G6), houve um aumento significativo da resist?ncia da fixa??o apenas no movimento de rota??o hor?ria. A rota??o anti-hor?ria do plano oclusal foi significativamente mais resistente que a hor?ria, quando se utilizou 2 placas na estabiliza??o da OSRM. / The aim of this study was to evaluate the resistance of fixation in the sagittal osteotomy of the mandibular ramus (OSRM) when performing great advances (12 mm), as well as the influence of the movement associated with the anticlockwise/clockwise rotation of the occlusal plane , Using plates and screws of the 2.0 mm system. Two types of advances were used (6 and 12 mm) using polyurethane hemimandibulars, with standardized OSRM, divided into 7 groups: G1 - linear advance of 6 mm / 1 plate and 4 screws; G2 - linear advance of 12 mm / 1 plate and 4 screws; G3 - linear advance of 12 mm / 2 plates and 8 screws; G4 - 12 mm advance, associated with clockwise rotation of the occlusal plane (15 ?) / 1 plate and 4 screws; G5 - 12 mm advance, associated with clockwise rotation of the occlusal plane (15 ?) / 2 plates and 8 screws; G6 - 12 mm advance, associated with anticlockwise rotation of the occlusal plane (15 ?) / 1 plate and 4 screws; G7 - 12 mm advance, associated with the counterclockwise rotation of the plane (15 ?) / 2 plates and 8 screws. The hemimandibules were submitted to a vertical compressive load in the first molar region and the applied force in Newtons was recorded in the displacements of 1mm, 5mm and 10mm, as well as the maximum force applied between 1 and 10mm. Using a 95% confidence interval, the means of strength were obtained and the groups were compared to each other. The statistical tests used were Kruskal-Wallis for the analysis of all groups and the Mann-Whitney test for comparison of two groups separately. The results showed that, according to the Kruskall-Wallis test, there were differences between groups. When only 1 plate was used for the fixation of the hemimandibula, at the 12 mm advance, the clockwise rotation was more resistant than in the linear movement, at the displacements of 1, 5 and 10 mm (p <0.05 **), Not resulting in statistical difference only in the maximum displacement (p = 0.112 **). In a large advance (12mm) there was a significant loss of resistance in the FIR, being necessary to compensate this situation with use of more fixation and the clockwise/counterclockwise rotation in these cases also added resistance in the OSRM, only in cases where a single plate is used. The counter-clockwise turn proved to be less sturdy than the clockwise rotation when fixed with one plate and more resistant when fixed with 2 plates. Both situations presented statistical significance with p <0.05. In view of these findings, it was concluded that regardless of movement, the fixation with 2 plates considerably increases the resistance to applied force.