Submitted by PPG Odontologia (odontologia-pg@pucrs.br) on 2018-06-04T12:06:37Z No. of bitstreams: 1 VANESSA_KERN_SOARES_SCHENCK_DIS.pdf: 1409671 bytes, checksum: 6c32cc0b785d0ae2ba34e6f032f8b469 (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-06-14T11:26:50Z (GMT) No. of bitstreams: 1 VANESSA_KERN_SOARES_SCHENCK_DIS.pdf: 1409671 bytes, checksum: 6c32cc0b785d0ae2ba34e6f032f8b469 (MD5) / Made available in DSpace on 2018-06-14T11:42:34Z (GMT). No. of bitstreams: 1 VANESSA_KERN_SOARES_SCHENCK_DIS.pdf: 1409671 bytes, checksum: 6c32cc0b785d0ae2ba34e6f032f8b469 (MD5) Previous issue date: 2018-01-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The Nance lingual arch is widely used in preventive and interceptive orthodontics, and its main objective is to maintain lower arch length in cases of premature loss of deciduous teeth or mild to moderate crowding during the change from a mixed dentition to permanent dentition. Objectives: To perform a literature review addressing aspects related to the uses of the lingual arch and its effect on the dentition, as well as to evaluate and compare the effect of the lingual arch in patients with vertical and horizontal growth patterns. Materials and methods: Linear and angular measurements were performed using cephalograms of 41 patients (21 horizontal and 20 vertical patients) after the use of the lingual arch for a period of 12 ? 3 months. A control sample of 21 patients was used to compare the effect of the lingual arch. The Kolmogorov-Smirnov normality test and Student's T test for dependent samples to compare before and after treatment were used. Student's T-test for independent samples was used to compare experimental group vs. control group and vertical vs. horizontal patients. In order to evaluate the reliability of the measurements, the Intraclass Correlation Coefficient (ICC) was calculated. The measures evaluated were: angular incisor, angular molar, angular second molar; vertical molar, vertical incisor, arch length and sagittal displacement of the incisor and molar. Results: The control group had a decrease in arch length of 1 ? 1.2 mm and the experimental group lost only 0.2 ? 1 mm (p = 0.01). There were no significant differences between experimental group and control for the other measures. When comparing vertical and horizontal patients, the only measure that showed statistically significant diference was the angular second molar. The lower second molars showed distal inclination in the horizontal type and a mesial inclination in the vertical type (p <0.05). Conclusion: The lingual arch was effective to control arch length during the study period. There was no difference in the effect of lingual arch between vertical and horizontal patients, except for second molar angulation. Mesial angulation of the second molar is related to greater chance of impaction. Vertical patients during the use of the lingual arch need to be monitored regarding the risk of impaction of the second permanent molar. / O arco lingual de Nance ? muito utilizado na Ortodontia preventiva e interceptativa, tendo como objetivo principal a manuten??o do comprimento do arco inferior em casos de perda precoce e/ou apinhamento leve a moderado durante a troca da denti??o mista para a permanente. Objetivos: Realizar uma revis?o de literatura abordando aspectos relacionados ? indica??o do arco lingual e seu efeito sob a denti??o, bem como avaliar e comparar o efeito do mesmo em pacientes com padr?es de crescimento vertical e horizontal. Materiais e m?todos: Foram realizadas medidas lineares e angulares atrav?s de telerradiografias de perfil em 41 pacientes (21 horizontais e 20 verticais) ap?s o uso do arco lingual por um per?odo de 12?3meses. Uma amostra controle de 21 pacientes foi utilizada para compara??o do efeito do arco lingual. Foram aplicados o teste de normalidade Kolmogorov-Smirnov e teste T de Student para amostras dependentes para comparar antes e ap?s tratamento e teste T de Student para amostras independentes para comparar grupo controle ao experimental e pacientes verticais aos horizontais. Para avalia??o da confiabilidade das medidas foi calculado o Coeficiente de Correla??o Intraclasse. As medidas avaliadas foram: angula??o do incisivo, angula??o do primeiro e segundo molares permanentes; extrus?o dos incisivo e primeiro molar, comprimento do arco e deslocamento sagital do incisivo e molar. Resultados: Pacientes do grupo controle apresentaram diminui??o do comprimento do arco de 1?1,2mm e pacientes do grupo experimental perderam somente 0,2?1mm (p=0.01). N?o houve diferen?as significativas entre grupo experimental e controle para as demais medidas. Ao comparar pacientes verticais e horizontais, as ?nicas medidas com diferen?a estat?stica foram angula??o do segundo molar. Os segundos molares inferiores apresentaram inclina??o distal no tipo horizontal e inclina??o mesial no tipo vertical (p<0,05). Conclus?o: O arco lingual foi efetivo para manter o comprimento do arco durante o per?odo do estudo. N?o houve diferen?a do efeito entre pacientes verticais e horizontais, exceto para angula??o do segundo molar. Angula??o mesial do segundo molar est? relacionada ? maior chance de impac??o. Pacientes verticais durante o uso do arco lingual precisam ser monitorados em rela??o ao risco de impac??o do segundo molar permanente.

Submitted by PPG Odontologia (odontologia-pg@pucrs.br) on 2018-06-04T17:39:23Z No. of bitstreams: 1 MARINA_CAVALLET_DE_ABREU_DIS.pdf: 5939437 bytes, checksum: 512afdadf2d38aff33e82d116c75c55d (MD5) / Rejected by Sheila Dias (sheila.dias@pucrs.br), reason: Devolvido devido ? falta da capa institucional no arquivo em PDF. on 2018-06-14T13:39:17Z (GMT) / Submitted by PPG Odontologia (odontologia-pg@pucrs.br) on 2018-06-26T18:07:27Z No. of bitstreams: 1 MARINA_CAVALLET_DE_ABREU_DIS.pdf: 3243819 bytes, checksum: b6fdcf46eabe33351202bd83deb2e3df (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-07-02T17:31:50Z (GMT) No. of bitstreams: 1 MARINA_CAVALLET_DE_ABREU_DIS.pdf: 3243819 bytes, checksum: b6fdcf46eabe33351202bd83deb2e3df (MD5) / Made available in DSpace on 2018-07-02T17:37:46Z (GMT). No. of bitstreams: 1 MARINA_CAVALLET_DE_ABREU_DIS.pdf: 3243819 bytes, checksum: b6fdcf46eabe33351202bd83deb2e3df (MD5) Previous issue date: 2018-01-24 / Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq / In preventive and interceptive orthodontics, the use of mandibular fixed lingual arch is a commonly accepted procedure to maintain arch perimeter by preventing mesial tipping or drifting of the mandibular molars. Despite its widespread use, comparatively little is known concerning the efficiency of a lower lingual holding arch as a space holding device and its effect on the dimensions of the lower arch. Objectives: To quantify the arch dimensional changes that occur during the lingual arch use. Digital models were used to evaluate sagittal and transversal changes in the lower arch. Materials and Methods: The sample consisted of 38 patients (20 boys, 18 girls), with a mean age of 9.2 years (range, 7-12.2 years). For the control group, a retrospective sample of 21 patients (11 boys, 10 girls) with a mean age of 9.4 years (range, 7.8 - 12.3 years) was selected. Patients were classified according to growth pattern, for SN.GoGn ? 32? (Horizontal) and for SN.GoGn> 32? (Verticals). A total of 118 dental cats were scanned (3Shape R700, Copenhagen, Denmark). The OrthoAnalyzer software (3Shape, Copenhagen, Denmark) was used to evaluate the files. The independent t-test was used to evaluate the experimental group and control group. And the paired t-test was used for a comparison between groups. Results: In the lingual arch group, the arch length was not significant (p >0,05). The intermolar width significantly increase (p <0.001). Buccolingual inclination of the lower incisors was statistically significant (p <0.001). The lingual arch was more effective for preserving the arch length in vertical patients (p< 0,001) and buccolingual inclination of the lower incisors was statistically significant for these patients (p <0.001) Conclusions: The lingual arch is good appliance for preserving arch length, mainly in vertical patients, but with a potential for buccolingual inclination of the lower incisors. The intermolar width, and buccolingual inclination of the molars and lower incisors significantly increased. / O aparelho arco lingual ? indicado para o tratamento na fase de denti??o mista com o intuito de preservar o comprimento de arco em casos de perda precoce de dentes dec?duos, impedindo a migra??o mesial do primeiro molar permanente. Embora a efetividade do uso do arco lingual seja universalmente aceita, o seu efeito na mudan?a da posi??o sagital e transversal dos molares e incisivos em pacientes em crescimento precisa ser melhor documentado. Objetivos: Avaliar em modelos digitais os efeitos do tratamento com arco lingual nos molares e incisivos permanentes em pacientes com diferentes tipos faciais. Materiais e M?todos: A amostra experimental consistiu em 38 pacientes (20 meninos, 18 meninas), com m?dia de idade de 9 anos e 2 meses (varia??o, 7-12,2 anos). Para o grupo controle, foi selecionada uma amostra retrospectiva de 21 pacientes (11 meninos, 10 meninas), com m?dia de idade de 9 anos e 4 meses (varia??o, 7,8 ? 12,3 anos). Os pacientes foram classificados de acordo com o padr?o de crescimento, para SN.GoGn ? 32? (Horizontais) e para SN.GoGn > 32? (Verticais). Um total de 118 modelos de estudo, foram escaneados (3Shape R700; Copenhagen, Denmark), e analisados no software OrthoAnalyzer (3Shape, Copenhagen, Denmark). O Teste t para amostras independentes foi utilizado para avaliar o grupo experimental e grupo controle. E o Teste t pareado, foi utilizado para a compara??o entre os grupos. Resultados: No grupo arco lingual o comprimento de arco n?o apresentou varia??o estatisticamente significativa (p >0,05). Ocorreu aumento estatisticamente significativo da dist?ncia intermolares (p<0,001). Ocorreu inclina??o para vestibular, estatisticamente significativa, dos incisivos inferiores (p < 0,001). O arco lingual foi mais efetivo na preserva??o do comprimento do arco para pacientes verticais (p< 0,001) e ocorreu inclina??o vestibular dos incisivos inferiores estatisticamente significativa para esses pacientes (p < 0,001). Conclus?es: O uso do arco lingual preservou o comprimento de arco, principalmente nos pacientes verticais, por?m com maior potencial de inclina??o vestibular dos incisivos inferiores nesses pacientes. O aparelho causou aumento significativo da dist?ncia intermolares, da inclina??o vestibular de incisivos e molares inferiores.