American Journal of Orthodontics and Dentofacial Orthopedics, 2007
Introduction: In this study, we compared retromolar available space and third molar angulation be... more Introduction: In this study, we compared retromolar available space and third molar angulation between the Class I and Class II sides in patients with Class II subdivision malocclusion. Methods: Two samples were obtained from 46 subjects grouped according to the following characteristics: group 1 comprised 29 subjects (17 male, 12 female) with Class II subdivision malocclusion at a mean age of 14.73 years. Group 2 was the control to assist in the asymmetry evaluation and included 17 subjects (11 female, 6 male) with normal occlusion at a mean age of 21.73 years. Corrected oblique radiographs of each patient side were obtained to evaluate right and left retromolar available space and third molar angulation. The retromolar space and third molar angulations in the Class I and Class II sides in each group were compared with paired t and Wilcoxon tests. Asymmetry between the Class I and Class II sides of the Class II subdivision malocclusion group was compared with asymmetry between the right and left sides of the normal occlusion group with independent t and Mann-Whitney tests. Results: The results demonstrated significant differences between the Class I and Class II retromolar available spaces in the Class II subdivision malocclusion group. Significant angular asymmetry between these sides was observed only for the mandibular third molars. However, when retromolar space asymmetry and third molar angular asymmetry were compared between the Class II subdivision malocclusion and the normal occlusion groups, there were significant differences only for retromolar space asymmetry. Conclusions: Patients with Class II subdivision malocclusion have asymmetric amounts of maxillary and mandibular retromolar available space and asymmetric angulation of the mandibular third molars between the Class I and Class II sides.
American Journal of Orthodontics and Dentofacial Orthopedics, 2004
The objective of this study was to evaluate the dentoskeletal changes consequent to orthodontic t... more The objective of this study was to evaluate the dentoskeletal changes consequent to orthodontic treatment in subjects with Class II subdivision malocclusions, treated with asymmetric extractions, compared with a normal-occlusion control group. The sample consisted of 3 groups, with 30 subjects in each: normal-occlusion subjects (group 1), untreated Class II subdivision subjects (group 2), and Class II subdivision patients treated with asymmetric extractions (group 3). All subjects had a full complement of permanent teeth at the beginning of treatment. The average ages of the subjects were 22.42, 15.76, and 18.57 years, respectively, in groups 1, 2, and 3. Measurements of relative differences in the spatial position of dental and skeletal bilateral landmarks were obtained from the submentovertex and posteroanterior cephalometric (PA) radiographs. The t test for independent samples was used to compare group 1 with groups 2 and 3 at different times. Results from the submentovertex radiograph showed that asymmetric extractions in Class II subdivision malocclusions will maintain the differences in the anteroposterior positions of right and left, maxillary and mandibular first molars, as would be expected with the treatment protocols used. There were no significant skeletal changes that could be attributed to the treatment approaches investigated or transverse collateral effects with the asymmetric mechanics used. It was also demonstrated that treatment of Class II subdivision malocclusions with asymmetric extractions produced corrections of maxillary and mandibular dental midline deviations with the midsagittal plane, without canting the occlusal plane or any other investigated horizontal plane, as seen in the PA radiograph. Treatment of Class II subdivision malocclusions with asymmetric extractions constitutes a beneficial approach to this problem.
This study compared the buccolingual inclination of the posterior teeth in subjects with a horizo... more This study compared the buccolingual inclination of the posterior teeth in subjects with a horizontal growth pattern (proportionally short lower anterior face height) with that of subjects with a vertical growth pattern (proportionally long lower anterior face height). Seventy subjects with permanent dentition were divided into 2 groups. Group I comprised 35 subjects (16 male, 19 female) with Class II Division 2 malocclusion with a horizontal growth pattern, and group II comprised 35 subjects (15 male, 20 female) with a vertical growth pattern. Buccolingual inclinations of the first molar and second premolar were indirectly assessed on photocopies of buccolingual sections of these teeth by measuring their occlusal surface (represented by an imaginary line connecting the lingual and buccal cusps) inclination. The groups were compared with t tests (P <.05). The maxillary posterior teeth of subjects with a vertical growth pattern had a significantly greater buccal inclination compared with those of subjects with a horizontal growth pattern. However, there were no statistically significant differences in the inclinations of the mandibular posterior teeth between the 2 groups.
Revista Brasileira De Hematologia E Hemoterapia, 2009
The determination of the blood group antigen profile of blood donors and transfusion patients is ... more The determination of the blood group antigen profile of blood donors and transfusion patients is important to avoid alloimmunization. The knowledge of blood group polymorphisms acquired over the last few years has permitted the development of molecular methods that are able to predict blood group phenotypes. For patients who have recently been transfused or those who present with autoimmune hemolytic anemia, genotyping is an important tool in blood typing. We used molecular biology (allele-specific PCR and PCR-RFLP) to genotype Rh (RHD, RHCE*C/c, RHCE*E/e), Kell (KEL*1/KEL*2), Kidd (JK*A/JK*B) and Duffy (FY*A/FY*B and FYB(-33T>C)) alleles and solved the inconclusive blood types of 36 patients. Twenty patients had developed irregular antibodies of different red blood cell antigens, most frequently anti-E (55%). The definition of irregular antibodies was feasible by genotyping. Due to their accuracy, simplicity and economic viability, these tests have been used in the clinical practice in our Institution since 2007, contributing to the management of chronically transfused patients. Additionally, these tests allow a better use of less common blood units related to the ethnicity of the blood donor population.
Revista Brasileira de Hematologia e Hemoterapia, 2009
Page 1. 252 Uso da genotipagem de grupos sanguíneos na elucidação de casos inconclusivos na fenot... more Page 1. 252 Uso da genotipagem de grupos sanguíneos na elucidação de casos inconclusivos na fenotipagem eritrocitária de pacientes atendidos na Fundação Hemominas Blood group genotyping to solve inconclusive phenotyping ...
American Journal of Orthodontics and Dentofacial Orthopedics, 2007
Introduction: In this study, we compared retromolar available space and third molar angulation be... more Introduction: In this study, we compared retromolar available space and third molar angulation between the Class I and Class II sides in patients with Class II subdivision malocclusion. Methods: Two samples were obtained from 46 subjects grouped according to the following characteristics: group 1 comprised 29 subjects (17 male, 12 female) with Class II subdivision malocclusion at a mean age of 14.73 years. Group 2 was the control to assist in the asymmetry evaluation and included 17 subjects (11 female, 6 male) with normal occlusion at a mean age of 21.73 years. Corrected oblique radiographs of each patient side were obtained to evaluate right and left retromolar available space and third molar angulation. The retromolar space and third molar angulations in the Class I and Class II sides in each group were compared with paired t and Wilcoxon tests. Asymmetry between the Class I and Class II sides of the Class II subdivision malocclusion group was compared with asymmetry between the right and left sides of the normal occlusion group with independent t and Mann-Whitney tests. Results: The results demonstrated significant differences between the Class I and Class II retromolar available spaces in the Class II subdivision malocclusion group. Significant angular asymmetry between these sides was observed only for the mandibular third molars. However, when retromolar space asymmetry and third molar angular asymmetry were compared between the Class II subdivision malocclusion and the normal occlusion groups, there were significant differences only for retromolar space asymmetry. Conclusions: Patients with Class II subdivision malocclusion have asymmetric amounts of maxillary and mandibular retromolar available space and asymmetric angulation of the mandibular third molars between the Class I and Class II sides.
American Journal of Orthodontics and Dentofacial Orthopedics, 2004
The objective of this study was to evaluate the dentoskeletal changes consequent to orthodontic t... more The objective of this study was to evaluate the dentoskeletal changes consequent to orthodontic treatment in subjects with Class II subdivision malocclusions, treated with asymmetric extractions, compared with a normal-occlusion control group. The sample consisted of 3 groups, with 30 subjects in each: normal-occlusion subjects (group 1), untreated Class II subdivision subjects (group 2), and Class II subdivision patients treated with asymmetric extractions (group 3). All subjects had a full complement of permanent teeth at the beginning of treatment. The average ages of the subjects were 22.42, 15.76, and 18.57 years, respectively, in groups 1, 2, and 3. Measurements of relative differences in the spatial position of dental and skeletal bilateral landmarks were obtained from the submentovertex and posteroanterior cephalometric (PA) radiographs. The t test for independent samples was used to compare group 1 with groups 2 and 3 at different times. Results from the submentovertex radiograph showed that asymmetric extractions in Class II subdivision malocclusions will maintain the differences in the anteroposterior positions of right and left, maxillary and mandibular first molars, as would be expected with the treatment protocols used. There were no significant skeletal changes that could be attributed to the treatment approaches investigated or transverse collateral effects with the asymmetric mechanics used. It was also demonstrated that treatment of Class II subdivision malocclusions with asymmetric extractions produced corrections of maxillary and mandibular dental midline deviations with the midsagittal plane, without canting the occlusal plane or any other investigated horizontal plane, as seen in the PA radiograph. Treatment of Class II subdivision malocclusions with asymmetric extractions constitutes a beneficial approach to this problem.
This study compared the buccolingual inclination of the posterior teeth in subjects with a horizo... more This study compared the buccolingual inclination of the posterior teeth in subjects with a horizontal growth pattern (proportionally short lower anterior face height) with that of subjects with a vertical growth pattern (proportionally long lower anterior face height). Seventy subjects with permanent dentition were divided into 2 groups. Group I comprised 35 subjects (16 male, 19 female) with Class II Division 2 malocclusion with a horizontal growth pattern, and group II comprised 35 subjects (15 male, 20 female) with a vertical growth pattern. Buccolingual inclinations of the first molar and second premolar were indirectly assessed on photocopies of buccolingual sections of these teeth by measuring their occlusal surface (represented by an imaginary line connecting the lingual and buccal cusps) inclination. The groups were compared with t tests (P <.05). The maxillary posterior teeth of subjects with a vertical growth pattern had a significantly greater buccal inclination compared with those of subjects with a horizontal growth pattern. However, there were no statistically significant differences in the inclinations of the mandibular posterior teeth between the 2 groups.
Revista Brasileira De Hematologia E Hemoterapia, 2009
The determination of the blood group antigen profile of blood donors and transfusion patients is ... more The determination of the blood group antigen profile of blood donors and transfusion patients is important to avoid alloimmunization. The knowledge of blood group polymorphisms acquired over the last few years has permitted the development of molecular methods that are able to predict blood group phenotypes. For patients who have recently been transfused or those who present with autoimmune hemolytic anemia, genotyping is an important tool in blood typing. We used molecular biology (allele-specific PCR and PCR-RFLP) to genotype Rh (RHD, RHCE*C/c, RHCE*E/e), Kell (KEL*1/KEL*2), Kidd (JK*A/JK*B) and Duffy (FY*A/FY*B and FYB(-33T>C)) alleles and solved the inconclusive blood types of 36 patients. Twenty patients had developed irregular antibodies of different red blood cell antigens, most frequently anti-E (55%). The definition of irregular antibodies was feasible by genotyping. Due to their accuracy, simplicity and economic viability, these tests have been used in the clinical practice in our Institution since 2007, contributing to the management of chronically transfused patients. Additionally, these tests allow a better use of less common blood units related to the ethnicity of the blood donor population.
Revista Brasileira de Hematologia e Hemoterapia, 2009
Page 1. 252 Uso da genotipagem de grupos sanguíneos na elucidação de casos inconclusivos na fenot... more Page 1. 252 Uso da genotipagem de grupos sanguíneos na elucidação de casos inconclusivos na fenotipagem eritrocitária de pacientes atendidos na Fundação Hemominas Blood group genotyping to solve inconclusive phenotyping ...
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