The purpose of this study was to analye the risk  of the maxillary sinus lift technique, and the correlation between the thickness of the gingiva, maxillary sinus membrane and the maxillary sinus lateral wall. Cone-Beam Computer Tomograhy (CBCT)  records of 32 adult dentate patients (10 ♂ / 22♀) were analyzed. The gingival thickness records of the dental units were compared to the thickness measurements of the membrane and lateral wall of the maxillary sinus. The gingival biotypes varied between 1.1mm (thin)  and  1.6mm (thick) presenting a small association to sexes. The thickness of the sinus membrane presented small association between sexes (0.2mm♀ / 0.3mm♂) and gingival biotypes (Cohen’s D 0.52). The lateral wall presented a weak association between the biotypes (1.3mm-thin / 1.1mm - thick). There was also no correlation between the membrane and lateral wall (r = -0.22). The volume dimension related to the graft area of the sinus was 4mm³♂ and 5mm³♀. There was a weak correlation of gingival thickness compared to membrane thickness and lateral wall of the sinus (r = 0.304 / r = -0.31). Gingival thickness does not appear to be a reliable thickness predictor of the membrane or lateral wall of the maxillary sinus. The analysis of maxillary sinus anatomical structures through CBCT is the most reliable technique to identify the thickness of the membrane and  lateral wall of the maxillary sinus before surgery. We believe that new studies are necessary to confirm our findings.

In a third of adolescents, there is no difference in facial profiles between males and females. Male and female facial profi les of 380 'British-Caucasian' adolescents were compared using optical surface scanning. This 'records the three-dimension shape of the face non-invasively'. The subjects were recruited from an initial sample of 14,541 pregnancies that made up the Avon Longitudinal Study of Parents and Children (ALSPAC). Thirty scans were excluded from the study. Thirty-one percent of 'facial shells' from males and females matched exactly. From the remaining subjects, males tended to have more prominent noses and mouths, whereas females had more prominent eyes and cheeks, although the differences were small (<2.5 mm). These observations confi rmed fi ndings from other studies.

Background and Aim Methods and Materials

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Background Catheter ablation (CA) is a safe, effective, cost‐effective technique and may be considered a first‐line strategy for the treatment of symptomatic supraventricular tachycardias (SVT). Despite the high prospect of cure and the recommendations of international guidelines in considering CA as a first‐line treatment strategy, the average time between diagnosis and the procedure may be long. The present study aims to evaluate predictors related to non‐referral for CA as first‐line treatment in patients with SVT. Methods and Results The model was derived from a retrospective cohort of patients with SVT or ventricular pre‐excitation referred for CA in a tertiary center. Clinical and demographical features were used as independent variables and non‐referral for CA as first‐line treatment the dependent variable in a stepwise logistic regression analysis. Among 20 clinical‐demographic variables from 350 patients, 10 were included in initial logistic regression analysis: age, women, presence of pre‐excitation on ECG, palpitation, dyspnea and chest discomfort, number of antiarrhythmic drugs before ablation, number of concomitant symptoms, symptoms’ duration and evaluations in the emergency room due to SVT. After multivariable adjusted analysis, age (odds ratio [OR], 1.2; 95% CI 1.01–1.32; P =0.04), chest discomfort during supraventricular tachycardia (OR, 2.7; CI 1.6–4.7; P <0.001) and number of antiarrhythmic drugs before ablation (OR, 1.8; CI 1.4–2.3; P <0.001) showed a positive independent association for non‐referral for CA as SVT first‐line treatment. Conclusions The independent predictors of non‐referral for CA as first‐line treatment in our logistic regression analysis indicate the existence of biases in the decision‐making process in the referral process of patients who would benefit the most from catheter ablation. They very likely suggest a skewed medical decision‐making process leading to catheter ablation underuse.

The purpose of this study was to investigate the relationship between the alveolar bone and gingival dimensions in the maxillary anterior teeth. Cone-beam computed tomography images of 160 maxillary anterior teeth were evaluated. The Bone (BT) and Gingival Thickness (GT) and distances between Cemento-Enamel Junction (CEJ) and alveolar Bone Crest (CEJ-BC) and Cemento-Enamel Junction and Gingival Margin (CEJ-GM) were measured on the labial surface at the cervical third of the tooth root. Pearson correlation test or partial correlation was used. BT was significantly and positively associated with CEJ-GM in lateral incisors (p=0.04). The correlation between CEJBC and CEJ-GM was negative and statistically significant for incisors and canines (p≤0.01). The correlation between CEJ-BC and GT was positive and statistically significant for central incisors and canines (p≤0.01). Greater bone thickness was associated with higher gingival margin level at the lateral incisor, but not with bone crest level. Lower bone crest level was associated with greater gingival thickness at the central incisor and canines, and with lower gingival margin level at all the anterior maxillary teeth. The planning of orthodontic, periodontal, and restorative treatments should consider these dimensions of marginal periodontal tissue are interrelated and their relationship vary by tooth type.

Objective: The present study aimed to investigate the relationship between tooth inclination and gingival and bone dimensions in maxillary anterior teeth. Methods: This cross-sectional study included cone-beam computed tomography (CBCT) images of 160 maxillary anterior teeth (30 individuals). Tooth inclination, gingival and bone thickness, and distances from cementoenamel junction to alveolar bone crest and gingival margin were measured in the labial surface. The correlations were analyzed using Pearson and partial correlation tests (p≤0.05). Results: In the central incisors, tooth inclination was positively and significantly related to apical bone thickness (R = 0.34, p= 0.001). In the canines, tooth inclination was negatively and significantly related to cervical bone thickness (R = - 0.34, p= 0.01) and positively associated to apical bone thickness (R = 0.36, p= 0.01) and to gingival margin-cementoenamel junction distance (R = 0.31, p= 0.03). In the lateral incisors, tooth inclination was not associated with gingival or bone dimensions. Conclusions: In the central incisors, the greater the labial tooth inclination, the greater is the apical bone thickness. In the canines, the greater the labial tooth inclination, the smallest is the cervical bone thickness, the greater is the apical bone thickness, and the greater is the gingival margin. Gingival and bone dimensions should be assessed when planning orthodontic treatment involving buccal movement of central incisors and canines.

INTRODUÇÃO: A reabilitação implantossuportada em região anterior maxilar é um desafio do ponto de vista estético e sua previsibilidade leva em conta o biótipo gengival e a espessura da tábua óssea vestibular. OBJETIVO: O objetivo deste trabalho é verificar a correlação entre as espessuras da gengiva e do osso subjacente, para efeito de análise de risco na reabilitação com implantes osseointegráveis. METODOLOGIA: Foram analisadas tomografias computadorizadas de feixe cónico (TCFC) de 32 pacientes dentados adultos (10 masc./ 22 fem.). A espessura dos tecidos moles foi medida 2mm apical a partir da margem gengival das unidades dentárias anteriores e pré-molares, sendo associada às medidas da tábua óssea vestibular, a qual foi mensurada nos três terços radiculares no menor ponto de espessura. RESULTADO: A espessura gengival entre os biótipos fino (1,1mm) e espesso (1,6mm) mostrou-se distinta, ao contrário da encontrada entre os sexos feminino (1,3mm) e masculino (1,4mm). A espessura da tábua óssea vestibular cervical não apresentou diferença na comparação entre os biótipos (0,33 – região anterior/0,53 – região posterior). CONCLUSÃO: A espessura da tábua óssea cervical não sofreu influência do biótipo gengival e sexo. O biótipo gengival não mostrou correlação significativa na comparação com as espessuras da tábua óssea vestibular.