Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references (leaves 259-298).

Habilitationsschrift--Münster. / Bibliography: p. [120]-127.

Thesis (M.S.)--University of Louisville, 2004. / School of Dentistry, Program in Oral Biology. Vita. "May 2004." Includes bibliographical references (leaves 29-31).

Orientadores: Luiz Andre Freire Pimenta, Roger William F. Moreira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-04T18:54:29Z (GMT). No. of bitstreams: 1 Soeiro_CaioRaphaelMartins_M.pdf: 2461458 bytes, checksum: a915238a9a46bd5f97910453d4513248 (MD5) Previous issue date: 2004 / Resumo: Os obje1ivos deste estudo "ín vítro" foram avaliar a resistência de união ao esmalte e o padrão de condicionamento ob1ido por sistemas adesivos autocondicionantes quando aplicados de forma passiva e a1iva. Foram utilizados 100 dentes bovinos, em que o esmalte ves1ibular foi regularizado através de desgaste superficial. Os corpos-de-prova foram divididos aleatoriamente em 10 grupos (n= 10). Foram 1ilizados um adesivo convencional (Single Bond/3MESPE - SB) e 4 adesivos autocondicionantes (Tyrian SPE/BISCO - TY; Clearfil SE Bond/Kuraray - CL; One Up Bond F/Tokuyama - OU e Prompt-LPop/3MESPE - PL). Para cada sistema adesivo exis1iram dois grupos experimentais. Um no qual o adesivo foi aplicado de forma passiva (P) (Durante o tempo de espera prévio a polimerização, o adesivo foi man1ido em repouso). E outro em que o adesivo foi aplicado de forma a1iva (A) (Durante o tempo de espera, o adesivo esteve sendo re-aplicado até que o tempo de espera cessasse). Para o grupo controle, os dentes foram condicionados com ácido fosfórico 35%/3M/ESPE durante 30 segundos, lavados com spray de água por 15 segundos e secos com papel absorvente. O adesivo Single Bond foi aplicado segundo as recomendações do fabricante para o grupo experimental 1 (Controle passivo). O mesmo procedimento foi realizado para o grupo 2 (Controle a1ivo), exceto a forma de aplicação. Para os demais grupos, os dentes receberam a aplicação de cada adesivo nas recomendações de cada fabricante, de maneira passiva e ativa, Os corpos-de-prova foram restaurados com resina Filtek Z-250/3MESPE, através da confecção de um "bloco" de resina. Através de cortes em máquina de cortes seriados, foram ob1idos espécimes em forma de "palito" com uma área de secção transversal de aproximadamente 1,Omm2 que foram individualmente fixados ao disposi1ivo para ensaio de microtração (MT -JIG) de modo a posicionar a área de união perpendicularmente ao longo eixo da força de tração, feita em máquina de ensaio universal/EMIC DL500. Os valores de resistência à união foram subme1idos à análise de variância (fatorial) e Teste de Tukey. Os resultados, em MPa/desvio padrão para cada grupo foram: SB/P - 10,86 (3,50)Ba; SB/A 13,39 (1 ,24)Aa; TY/P - 9,17 (3, 19)Aab; TY/A - 8,21 (3,88jAbc; CL/P - 8,58 (2,46jAab; CL/A - 10,23 (3,58jAabc; OU/P - 6,24 (1,61)Bb; OU/A - 11,90 (2,12jAab; PL/P - 7,97 (0,91jAab; PL/A - 7,22 (2,05jAc. Para análise do padrão de condicionamento, foram u1ilizados 45 dentes bovinos (n=5). Para os grupos 1 e 2 (Controles), 5 dentes foram condicionados com ácido fosfórico 35% por 30 segundos, lavado com spray de água por 15 segundos e secos com jatos de ar. Os sistemas adesivos autocondicionantes foram aplicados de forma passiva e a1iva. Cada espécime foi lavado com água por 15 segundos, com acetona por 10 segundos e seco com jatos de ar, sendo então levadas ao microscópio eletrônico de varredura JEOL 5600 LV. As imagens sugeriram relação entre o padrão de condicionamento e os valores de resistência à união ob1idos, os quais mostraram diferenças estaiís1icas para alguns dos adesivos avaliados / Abstract: The aim of this study were evaluate the bond strength and conditioning pattern obtained from different self-etching adhesive systems applied on enamel by active and passive forms. 100 bovine incisors were sectioned in 6x6mm fragments from the buccal enamel surface. The specimens were divided into 10 groups (n= 1 O). It was used one single bottle adhesive system (Single Bond/3MESPE - SB) as Control and four self-etching adhesive systems (Tyrian SPE/BISCO - TV; Clearfil SE Bond/Kuraray - CL; One Up Bond F/Tokuyama OU and Prompt-LPop/3MESPE - PL). For each adhesive system, there were two experimental groups, The adhesive was applied by passive form (P) (during the waiting time previous the polymerization, the adhesive was left intact over the enamel surface) or the adhesive was applied by active form (A) (the adhesive was reapplied during the waiting time previous the polymerization). For the Con1rol group, the tooth were conditioned with 35% phosphoric acid/3MESPE for 30 seconds, washed with water spray for 15 seconds and lot dried with absorbent paper. Single Bond was applied following the manufacture's ins1ructions (passive con1ro! group)(Group 1). The same procedure was made for active con1rol group (Group 2), except during the waiting time previous the polymerization, the adhesive was continuously reapplied on the enamel surface, The self-etching adhesives were applied following the manufacturer's instructions, receiving both applications forms (passive and active). The specimens were restored with Filtek Z-250/3MESPE, Using a saw machine, were obtained specimens in a stick (beam) shape with 1,Omm2 1ransversal sectional area, Those sticks were individually fixed in a microtensile jig, attached in an universal testing machine. The bond strength values were analyzed by Two-way ANOVA and Tukey's test. The means, and standard deviations, expressed in MPa, were: SB/P - 10,86 (3,50)Ba; SB/A - 13,39 (1 ,24)Aa; TV/P - 9,17 (3, 19)Aab; TV/A - 8,21 (3,88)Abc; CljP 8,58 (2,46)Aab; CljA - 10,23 (3,58)Aabc; OU/P - 6,24 (1,61 )Bb; OU/A - 11,90 (2,12)Aab; PljP - 7,97 (0,91 )Aab; PL/A - 7,22 (2,05)Ac, For conditioning pattern analysis, 45 bovine incisors (n=5) were used. For groups 1 and 2, the teeth were conditioned with 35% phosphoric acid for 30 seconds, washed with water spray for 15 seconds and air dried, The self-etching adhesives were applied by passive and active forms. After that, those specimens were washed with water spray for 15 seconds, washed with acetone for 10 seconds and air dried. The specimens were prepared for SEM and observed in a JEOL 5600 LV. The images suggested that the conditioning pattern is related to bond s1rength values, that presented statistical differences for some adhesives studied. / Mestrado / Dentística / Mestre em Clínica Odontológica

Indiana University-Purdue University Indianapolis (IUPUI) / While advances in lasers for soft tissue applications have drastically increased its usage in dentistry, laser use for hard tissue still needs development. This study was conducted to determine the difference between permanent and primary enamel after their exposure to the Nd:YAG laser. Four parameters were studied: Surface topography, acid resistance, surface hardness and caries-like lesion depth creation. Differences between lased primary and permanent teeth were seen in two parameters. Calcium disassociation during acid attack was significantly higher for lased primary enamel (p=0.0126), and lased primary enamel became softer while permanent enamel became harder (p=0.0001). While this study adds to the body of knowledge related to hard tissue laser use, further evaluation and research is needed prior to the routine use of the laser on primary enamel.

No description available.

Thesis (M.S.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains viii, 118 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 65-73).

Thesis (M.S.)--University of Michigan, 1986.

Thesis (M.S.)--University of Michigan, 1984.

Thesis (M.S.)--University of Michigan, 1986.