ABSTRACT Introduction: Symmetry is balance, some correspondence in the size, form, and arrangements of parts on opposite sides of a plane, line, or point. The opposite of this concept is asymmetry, or imbalance. Objective: This retrospective study compared two methods for assessing arch symmetry with linear measurements based on triangles, to determine their applicability and efficiency. Methods: Two groups were enrolled: children (n=20) and adults (n=20), and the arch symmetry was assessed from linear measurements. Method 1: the incisor-canine (INC), canine-molar (CM), and incisor-molar (INM) distances (paired t-test and Pearson correlation). Method 2: a mathematical equation between the cusps measurements of the canines and the distobuccal of the first molars leading to result 1 (t-test for one sample and bootstrapping analysis). Dental casts were digitized and analyzed using a software program. The Bland-Altman test compared the methods (α=0.05). Results: The Bland-Altman test revealed concordance between the methods; however, separately the results were different: In method 1, the mandibular arch did not demonstrate correlation (children, INC r=0.33; CM r=0.45; INM r=0.51; adults, CM r=0.46; INM r=0.35), however, the maxilla revealed a strong correlation in children and a strong/moderate correlation in adults. In method 2, both arches were symmetrical (p>0.05). Conclusion: Method 1 may be appropriate during orthodontic treatment, and method 2 may be indicated for final treatment. These methods are useful; however, only method 1 identified the side of asymmetry. The methods can contribute to future studies in syndromic and non-syndromic patients, before and after orthognathic surgeries and orthodontic treatment, comparing results. Introduction balance size form plane line point asymmetry imbalance Objective triangles efficiency Methods enrolled n=20 n20 n 20 (n=20 n=20, , incisorcanine incisor canine INC, (INC) caninemolar molar CM, (CM) incisormolar (INM paired ttest t correlation. . correlation) analysis. analysis analysis) program BlandAltman Bland Altman α=0.05. α005 α α=0.05 0 05 (α=0.05) Results however different children, (children r=0.33 r033 r 33 r=0.45 r045 45 r=0.51 r051 51 r=0.46 r046 46 r=0.35, r035 r=0.35 35 r=0.35) strongmoderate moderate p>0.05. p005 p p>0.05 (p>0.05) Conclusion treatment useful nonsyndromic non patients n=2 n2 (n=2 (INC (CM α00 α=0.0 (α=0.05 r=0.3 r03 3 r=0.4 r04 4 r=0.5 r05 5 p00 p>0.0 (p>0.05 n= (n= α0 α=0. (α=0.0 r=0. r0 p0 p>0. (p>0.0 (n α=0 (α=0. r=0 p>0 (p>0. α= (α=0 r= p> (p>0 (α= (p> (α (p

RESUMO Introdução: Simetria é o equilíbrio ou correspondência no tamanho, na forma e na disposição das partes em lados opostos de um plano, linha ou ponto. O oposto desse conceito é assimetria ou desequilíbrio. Objetivo: Esse estudo retrospectivo comparou dois métodos de avaliação da simetria da arcada a partir de medidas lineares baseadas em triângulos, para determinar sua aplicabilidade e eficiência. Métodos: A amostra foi composta por dois grupos: crianças (n=20) e adultos (n=20), e a simetria das arcadas foi avaliada a partir de medidas lineares. Método 1: as distâncias incisivo-canino (INC), canino-molar (CM) e incisivo-molar (INM) (testet pareado e correlação de Pearson). Método 2: uma equação matemática com as medidas entre as cúspides dos caninos e a as cúspides distovestibulares dos primeiros molares, levando ao resultado 1 (teste t para uma amostra e análise de bootstrapping). Os modelos dentários foram digitalizados e analisados por meio de um software. O teste de Bland-Altman comparou os métodos (α = 0,05). Resultados: O teste de Bland-Altman revelou concordância entre os métodos; no entanto, separadamente, os resultados foram diferentes: no Método 1, a arcada inferior não demonstrou correlação (crianças, INC r=0,33; CM r=0,45; INM r=0,51; adultos, CM r=0,46; INM r=0,35); no entanto, a arcada superior revelou uma forte correlação em crianças e uma correlação forte/moderada em adultos. No Método 2, ambas as arcadas eram simétricas (p>0,05). Conclusões: O Método 1 pode ser apropriado durante o tratamento ortodôntico, e o Método 2 pode ser indicado para o tratamento final. Esses métodos são úteis; entretanto, somente o Método 1 identificou o lado da assimetria. Os métodos podem contribuir para estudos futuros em pacientes sindrômicos e não sindrômicos, antes e depois de cirurgias ortognáticas e tratamento ortodôntico, comparando os resultados. Introdução tamanho plano ponto desequilíbrio Objetivo triângulos eficiência Métodos grupos n=20 n20 n 20 (n=20 n=20, , incisivocanino incisivo canino INC, (INC) caninomolar molar (CM incisivomolar (INM testet Pearson. Pearson . Pearson) molares bootstrapping. bootstrapping bootstrapping) software BlandAltman Bland Altman α 0,05. 005 0,05 0 05 0,05) Resultados entanto separadamente diferentes crianças, (crianças r=0,33 r033 r 33 r=0,45 r045 45 r=0,51 r051 51 r=0,46 r046 46 r=0,35 r035 35 r=0,35) fortemoderada moderada p>0,05. p005 p p>0,05 (p>0,05) Conclusões ortodôntico final úteis entretanto n=2 n2 (n=2 (INC 00 0,0 r=0,3 r03 3 r=0,4 r04 4 r=0,5 r05 5 p00 p>0,0 (p>0,05 n= (n= 0, r=0, r0 p0 p>0, (p>0,0 (n r=0 p>0 (p>0, r= p> (p>0 (p> (p

Abstract This study aimed to evaluate the influence of cleft width on dental arch symmetry of children with unilateral cleft lip and palate. Forty-one children were subjected to impression preoperatively (T1; mean age = 0.31 ± 0.07 years) and postoperatively (T2; mean age = 6 .73 ± 1.02 years). Eighty-two digitized dental casts were analyzed by stereophotogrammetry software. The cleft palate width was measured in the anterior (P-P’), middle (M-M’), and posterior (U-U’) regions. Also, the following measurements were obtained: anterior intersegment (I-C’) and intrasegment (I-C); total intersegment (I-T’) and intrasegment (I-T); cleft-side (C’-T’) and non-cleft-side (C-T) canine tuberosity. Paired t test and Pearson correlation coefficient were applied (α = 5%). Cleft width had the following means: 10.16 (± 3.46) mm for P-P’, 12.45 (± 3.00) mm for M-M’, and 12.57 (± 2.71) mm for U-U’. In the longitudinal analysis, I-C’ had a significant reduction, while the other measurements significantly increased (p < 0.001). Asymmetry was verified in the following analyses at T1: I-C’ vs. I-C and I-T’ vs. I-T (p < 0.001); at T2, only in I-C’ vs. I-C (p < 0.001). At T1, P-P’ vs. I-C’ (r = 0.722 and p < 0.001), P-P’ vs. I-T’ (r = 0.593 and p < 0.001), M-M’ vs. I-C’ (r = 0.620 and p < 0.001), and M-M’ vs. I-T’ (r = 0.327 and p < 0.05) showed a positive and significant correlation. At T2, there was a correlation between M-M’ and I-C’ (r = 0.377 and p < 0.05). In conclusion, the anterior and middle cleft widths influenced palatal asymmetry in the first months of life, while middle width influenced residual asymmetry. Fortyone Forty one T1 T (T1 031 0 31 0.3 007 07 0.0 years T2 (T2 73 .7 102 1 02 1.0 years. . Eightytwo Eighty two software PP, PP P , (P-P’) MM, MM M (M-M’) UU U (U-U’ regions Also obtained IC I C (I-C’ (I-C) IT (I-T’ (I-T) cleftside side CT (C’-T’ noncleftside non (C-T tuberosity α 5%. 5 5% 5%) means 1016 10 16 10.1 ( 3.46 346 3 46 1245 12 45 12.4 3.00 300 00 1257 57 12.5 2.71 271 2 71 UU. U-U’ analysis reduction 0.001. 0001 0.001 001 0.001) vs P-P r 0722 722 0.72 0.001, 0593 593 0.59 M-M 0620 620 0.62 0327 327 0.32 0.05 005 05 0377 377 0.37 0.05. conclusion life (T 03 0. 7 1. (P-P’ (M-M’ (U-U (I-C (I-T (C’-T 101 10. 3.4 34 4 124 12. 3.0 30 125 2.7 27 U-U 000 0.00 072 72 0.7 059 59 0.5 062 62 0.6 032 32 037 37 (P-P (M-M 3. 2. 06

Abstract To assess facial changes after oral rehabilitation with complete dentures (CDs) by 3D technology allows understanding the results of a treatment that changes facial proportions. Precise outcome parameters can improve decision making. Objective This descriptive observational research aimed to assess facial changes in completely edentulous patients after oral rehabilitation with a CD by a 3D stereophotogrammetry system. Methodology 30 edentulous patients (7 men and 23 women), aged 50 to 75, were analyzed with stereophotogrammetry at 28 previously determined anthropometric landmarks, at 2 different times: T1, before treatment, and T2, after inserting the CDs. Images were analyzed with a specific software for linear and angular measurements. The paired t-test was used to compare timestamps (α=0.05). Results Major changes were observed in 7 of the 13 linear measures and 7 of the 9 angular measures. The following linear measurements had an increase: Sn-Gn (lower third of the face), Ls-Li (height of the vermilion lip), and ChL-ChR (mouth width). Sn-Ls (nasal philtrum height) decreased. For angular measurements, Sn-St-Pg (lower facial convexity) angles increased, and the Prn-Sn-Ls (nasolabial angle) and GoR-Pg-GoL (mandible convexity) angles decreased. Conclusions Major facial changes in newly rehabilitated edentulous patients with CDs included an increase of the lower third of the face, of the vermilion lip, of mouth width, and of the lower facial convexity, and a decrease of the nasolabial angle and mandible convexity.

Abstract This study aimed to compare the linear dimensions of the dental arches of adult patients with complete unilateral cleft lip and palate (UCLP) after orthodontic and prosthetic treatment with fixed partial dentures (FPD) to patients without clefts, using 3D technology. This retrospective longitudinal study sample consisted of 35 subjects divided into two groups. Included in this sample were 15 complete UCLP individuals who had received orthodontic treatment before rehabilitation with a fixed partial denture (FG), as well as 20 patients without cleft as control group (CG). All patients were aged between 18 and 30 years. Digital dental casts were obtained in two stages: (T1) end of orthodontic treatment and (T2) one year after prosthetic rehabilitation (FG); and (T1) end of orthodontic treatment and (T2) one year after removal of the orthodontic appliance (CG). Intercanine, interfirst premolar and intermolar distances, and incisor-molar length were obtained. A precalibrated and trained examiner performed the assessments. Intergroup differences between T2 and T1 were compared between the groups using the t test or Mann-Whitney test with a significance level of 5% (p<0.05). The intercanine distance variation (T2-T1) showed statistical difference (p=0.005) increasing in the FG group and decreasing in the CG group. In the interfirst premolar distance variation, FG decreased, while CG increased with statistically significant difference (p=0.008). The intercanine distance of individuals with cleft showed stability, while that of the CG had no stability. The CG showed stability in the interfirst premolar distance, while FG had no stability. These findings showed that the FPD is capable of restricting orthodontic results, leading to a stabilization of the dental arches.

RESUMO O tratamento reabilitador de um paciente com fissura labiopalatina envolve um longo período e efetuado por diversos profissionais de diferentes áreas da saúde. Para tal, o planejamento e o conhecimento específico são de suma importância para o sucesso do tratamento, vislumbrando, dessa forma, a reabilitação estética e funcional do indivíduo de forma a integrá-lo na sociedade. O presente trabalho consiste em relato de um caso clínico, demonstrando o tratamento efetuado com a utilização de prótese parcial removível utilizando os dentes pilares tratados com coroas metalo-cerâmicas fresadas e a utilização de encaixes, com intuito de favorecer a retenção e estabilidade do aparelho protético. Com o uso de todo esse sistema objetivando a melhoria nas proporções faciais devido à devolução da dimensão vertical de oclusão e suporte labial adequado, características que muitas vezes não estão presentes nos indivíduos com fissuras labiopalatinas. Este trabalho tem o intuito de ressaltar a importância do conhecimento científico e técnico, somados a planejamento bem realizado a fim de se conseguir o sucesso do tratamento, devolvendo função e estética do paciente, reintegrando-o a sociedade.

ABSTRACT The rehabilitation treatment of patients with cleft lip and palate is lengthy and is carried out by various professionals from different areas of healthcare.To this end, planning and specialist knowledge are critical to the success of the treatment, in this way envisioning the aesthetic and functional rehabilitation of the individual in order to integrate them into society. This study consists of a literature review along with the report of a clinical case, demonstrating the treatment performed with the use of a removable partial denture using the abutment teeth treated with milled metal-ceramic crowns and the use of attachments, with a view to promoting the retention and stability of the prosthetic device. With the use of this system as a whole, aimed at improving the facial proportions due to the restoration of vertical dimension of occlusion and adequate lip support, features that are often not present in individuals with cleft lip and palate. In this work, we are seeking to underline the importance of scientific and technical knowledge, combined with a well-executed planning, in order to achieve successful treatment that restores function and aesthetics to the patient, thereby enabling their reintegration into society.