ABSTRACT
OBJECTIVE: To evaluate the null hypothesis that there is no difference between the vertical compensation necessary to level the clinical crown centers and that required to level the marginal ridges. MATERIALS AND METHODS: Initial dental casts selected from 200 patients that met the selection criteria were included. The vertical position of the clinical crown center (VPCC) and marginal ridge (VPMR) of posterior teeth were measured in both arches using a digital height gauge with 0.01mm precision. The vertical discrepancy between the clinical crown centers (VDCC) and marginal ridges (VDMR) of adjacent posterior teeth were calculated and compared. The significance level was set at P < .05. RESULTS: In general, vertical discrepancies between VDCC and VDMR were statistically significant (P < .05). Clinically significant differences were observed between the maxillary second premolar and first molar and between the mandibular molars. The VPCC was significantly and positively correlated with patient age. CONCLUSIONS: Differences between VDCC and VDMR showed that the VPCC may not be an accurate predictor of marginal ridge leveling because the vertical compensation necessary to level the VPCCs is not similar to that required to level the marginal ridges, requiring caution in its utilization, mainly in teenagers.
Subject(s)
Orthodontics/methods , Tooth Crown/anatomy & histology , Adolescent , Female , Humans , Male , Odontometry , Orthodontic Appliance Design , Orthodontic Brackets , Orthodontic Wires , Reproducibility of ResultsABSTRACT
Objetivo: determinar o posicionamento vertical da crista marginal (PVCM) e do centro lingual da coroa clínica (PVCC), bem como comparar a discrepância vertical de posição entre cristas marginais (DVCM) e centros de coroas clínicas (DVCC) de dentes adjacentes. Material e métodos: uma amostra foi selecionada a partir de um grupo de 1.430 pacientes. Duzentos pacientes que preenchiam os critérios de seleção tiveram seus modelos de gesso iniciais selecionados. Após a padronização do posicionamento do modelo de gesso, o PVCM e PVCC dos dentes posteriores de ambos os arcos foram medidos, permitindo o cálculo da DVCM e DVCC. Um medidor digital de altura com precisão de 0,01 mm foi utilizado para as avaliações, e os dados foram comparados estatisticamente (p < 0,05). Resultados: em geral, os dentes posteriores adjacentes apresentaram diferentes PVCM e PVCC. As variáveis DVCM e DVCC foram significantemente diferentes, exceto entre pré-molares inferiores. As diferenças entre DVCM e DVCC foram clinicamente significantes (> 0,5 mm). O PVCC foi significantemente correlacionado com a idade do paciente. Conclusão: as diferenças entre DVCM e DVCC indicaram que o centro lingual da coroa clínica não foi uma referência anatômica confiável para predizer o nivelamento das cristas marginais. A idade do paciente parece ser um fator adicional que limita o uso adequado deste referencial.
Objective: to determine the vertical positioning of the marginal ridge (VPMR) and clinical crown center (VPCC) regarding the tip of the lingual cusp, and to compare the vertical discrepancy between adjacent marginal ridges (VDMR) and clinical crown centers of adjacent posterior teeth (VDCC). Material and methods: the sample was selected from a pool of 1.430 patients. Two hundred initial dental casts were selected from patients that met the selection criteria. After standardization of the dental cast positioning, VPMR and VPCC of posterior teeth were measured in both arches, allowing the calculation of VDMR and VDCC. Measurements were performed with a digital height gauge and accuracy of 0.01 mm. Data were statistically compared at p < 0.05. Results: in general, adjacent posterior teeth had different VPMR and VPCC. The variables VDMR and VDCC were significantly different, except between mandibular premolars. The differences between VDMR and VDCC were clinically significant (> 0.5 mm). Patient age and VPCC were significantly correlated. Conclusion: the differences between VDMR and VDCC showed that lingual center of the clinical crown was not a reliable anatomical reference to predict the marginal ridge leveling. Patient's age seems to be an additional factor limiting the adequate use of this landmark.
Subject(s)
Orthodontic Appliances , Tooth Crown , Orthodontic Brackets , Tooth EruptionABSTRACT
PURPOSE: To assess the prevalence of Temporomandibular Disorders (TMD) and Orofacial Pain (OFP) in women victim of domestic violence, and the impact of chronic pain in related psychosocial factors, such as depression and somatization, as well as in the women's quality of life. METHODS: A convenience sample of 20 women in a situation of domestic violence who accessed support institutions were voluntarily interviewed. OFP and related psychosocial factors were assessed by using the RDC/TMD (Research Diagnostic Criteria for TMD) Axis II, and the history of physical and sexual abuse by the S/PAHQ (Sexual and Physical Abuse History Questionnaire). RESULTS: Eighty percent of women victim of violence showed chronic pain, varying from 1 to 3 on a four-point scale (0 to 3), 65 percent showed severe depression, and 60-70 percent reported evere somatization with or without pain, respectively. In addition, 85 percent reported pain in the face, temples and ear in the last month with a recurrent pattern. CONCLUSION: Data indicated high prevalence of TMD and OFP in this sample. There is a need for qualification of health professionals dealing with abused women in order to identify the presence of TMD and OFP as well as depression and somatization.
OBJETIVO: Os objetivos deste estudo foram o de avaliar a prevalência de Disfunção Têmporo-Mandibular e Dor Orofacial (DTM e DOf) em mulheres vítimas de violência, e o impacto da dor crônica nos fatores psicossociais relacionados, como depressão e somatização, e na qualidade de vida das mulheres. METODOLOGIA: Uma amostra de conveniência de 20 mulheres em situação de violência doméstica que acessam instituições de apoio foram entrevistadas volutariamente. A dor orofacial e fatores psicossociais relacionados foram avaliados pelo RDC/DTM (Critério de Diagnóstico para Pesquisa das Desordens Temporomandibulares) Eixo II, e a história de abuso físico e social pelo S/PAHQ (Questionário sobre História de Abuso Físico e Sexual). RESULTADOS: Oitenta por cento das mulheres vítimas de violência mostraram dor crônica, variando de 1 a 3 em uma escala de quarto ítens (0 to 3), 65 por cento demonstraram depressão severa, e 60 e 70 por cento, somatização severa com ou sem dor, respectivamente. Adicionalmente, 85 por cento relataram dor na face, têmporas e ouvido no ultimo mês com uma padrão recorrente. CONCLUSÃO: Os dados indicaram alta prevalência de DTM e DOf nesta amostra. Há necessidade de qualificação de profissionais de saúde que atendam mulheres agredidas a fim de identificar a presença de DTM e DOf, bem como depressão e somatização.
