Evaluation of the Nasopalatine Canal of Patients With and Without Cleft Lip and Palate in CBCT Exams.

OBJECTIVE: To identify and compare the morphology and dimensions of the nasopalatine canal (NPC) of individuals with and without cleft lip and palate using Conical Beam Computed Tomography (CBCT) images and to relate the results to the type of cleft and tooth absences in the region. SETTING: This is a cross-sectional, analytical study with a retrospective sample. PATIENTS, PARTICIPANTS: 100 CBCT exams from patients with cleft lip and palate and 100 CBCT exams from patients without cleft lip and palate were used. INTERVENTIONS: The NPC was evaluated for its morphology and measurements in the coronal, sagittal, and axial reformatting of CBCT exams. RESULTS: It was obtained as a result that in the group of patients with a cleft, the shapes of funnel, banana, and needle of the NPC were more frequent than in the control group. Patients with cleft lip and palate had significantly a larger nasopalatine foramen and a larger NPC diameter, besides a significantly shorter NPC, compared to controls. In both groups, edentulous patients had less anterior maxillary bone thickness, when compared to patients with maxillary anterior teeth. Patients with clefts had a bone thickness buccal to the NPC less than in the control group. CONCLUSIONS: This study confirms the anatomical variability of NPC in patients with cleft lip and palate. This finding reinforces the need for thorough surgical planning of the anterior region of the maxilla, in CBCT exams, by the dentist.

Study Between Panoramic Radiography and Cone Beam-Computed Tomography in the Diagnosis of Ameloblastoma, Odontogenic Keratocyst, and Dentigerous Cyst.

OBJECTIVE: To determine how the diagnosis may or may not be influenced by cone-beam computed tomography (CBCT), comparing the diagnostic hypotheses obtained using images of panoramic radiographs and CBCT in cases of ameloblastoma, odontogenic keratocyst, and dentigerous cyst. STUDY DESIGN: Five cases were selected for each lesion. Panoramic radiographs and CBCT scans were analyzed by 15 dentists for the formulation of the diagnostic hypotheses. Two observers performed the analyses and measurement of qualitative and quantitative features of the lesions evaluated in the CBCT. RESULTS: There was no statistically significant difference in correct diagnostic average between panoramic radiography and CBCT, but there was a significant difference in correct diagnostic average in the diagnosis of ameloblastoma using CBCT compared to panoramic radiography. Master's and PhD-level observers had greater correct diagnostic average in the diagnosis of odontogenic keratocyst using panoramic radiograph compared to specialists, with a significant difference. CONCLUSION: Cone-beam computed tomography images revealed that the ameloblastomas were greater in size and expansion compared to the odontogenic keratocyst and the dentigerous cysts. Ameloblastomas showed a higher incidence of multiloculated aspects compared to odontogenic keratocyst and dentigerous cysts. There were no differences between quantitative and qualitative features of odontogenic keratocyst and dentigerous cysts.

Usefulness of Cone-Bean Computed Tomography Exams to Detect Foramen of Huschke in Diverse Age Group.

The foramen of Huschke (FH) is present in the early stages of the temporal bone tympanic portion development. The literature shows that FH may persist in adult individuals and several authors acknowledge its clinical importance, reporting being associated with the dissemination of diseases. Some authors believe that FH presents importance in archeology and forensic situations.Considering that the identification of FH by conventional imaging methods is extremely impaired or impossible due to overlapping bone structures and that cone-bean computed tomography presents quality in the evaluation of this structure, the authors conducted this research to determine the FH prevalence and dimensions through the Invivo5 software, and correlated its size with age.The foramen was present in 19 scans (12.7%), 6 (8.8%) were present among male and 13 (15.8%) among female. The χ test was performed, with no statistically significant difference for gender and age. Considering the age, in individuals aged 7 to 18 years, 16.4% of persistent FH was found compared with 10.5% in individuals over 18 years of age. The diameter ranged from 2.58 to 3.28 mm. No correlation was found between size and age (p between 0.25 and 0.88).The authors conclude that the cone-bean computed tomography is an examination that allows the correct evaluation of the FH and, although the persistence of this unusual anatomical variation presents different frequencies in the different populations and age groups, it can have clinical consequences, so that the professionals who work in the area must be aware of its existence.

Study of Genial Tubercles of Craniofacial Anomalies Individuals on Cone Beam Computed Tomography Scans.

PURPOSE: Genial tubercles (GTs) are bony protuberances on the lingual aspect of the mandible symphysis, where genioglossus and geniohyoid muscles are inserted. In the literature, few papers report their real dimensions. Cleft lip and palate are craniofacial anomalies involving the maxilla, but the anatomical structures of the mandible can be altered when these have associated with the cleft, some syndrome. This study aimed to evaluate the GTs of 30 individuals and to make their measurements in cone beam computed tomography examinations. METHODS: A sample of 30 individuals, 19 of them with cleft lip and palate, 6 individuals with Treacher Collins syndrome (TCS), and 5 individuals with Pierre Robin sequence, was used. The GTs were evaluated about the amount and the following measurements were performed: A--distance from the apex of the central incisors to GT, B--mandibular thickness in the region of GT, C-GT height, D-GT width, and E--distance from inferior border of mandible to GT. RESULTS: The individuals presented since the absence of GTs to 3. The TCS group had the highest average of the measurements A, D, and E with statistical difference (P = 0.006) (P = 0.011) and (P = 0.017), respectively. The Pierre Robin sequence group had the highest average measurement of B and C, but there was no statistical difference. CONCLUSIONS: The difference in the measurements can be explained perhaps because individuals with TCS have glossoptosis and changes on retrognathic mandible, which would affect the position of the GT.

Evaluation of Interforaminal Mandible Region of Individuals With Pierre Robin Sequence and Treacher Collins Syndrome Through the Cone-Beam Computed Tomography.

The Pierre Robin sequence (PRS) and the Treacher Collins syndrome (TCS) are conditions that cause significant abnormalities of jaw. This study was conducted in anticipation of evaluating the morphology of interforaminal region and identify the anatomic variations: anterior loop and mandibular incisive canal, in individuals with PRS and TCS by cone-beam computed tomography and compare them with individuals without craniofacial anomalies. By applying the t-test, the results showed no statistically significant difference, allowing to infer that there are no significant differences in interforaminal mandible morphology between groups and indicated that the prevalence and location of the studied anatomic variations are consistent with those described in literature.

Interpretação das imagens em tomografia computadoriza de feixe cônico / Reading and interpreting CBCT imaging

Introdução: a tomografia computadorizada de feixe cônico (TCFC) é uma ferramenta auxiliar e complementar de diagnóstico muito presente na prática clínica odontológica; porém, as tecnologias nela envolvidas requerem conhecimento e treinamento do cirurgião-dentista. Objetivo: este artigo aborda os conceitos básicos que regem a TCFC, os artefatos de imagem que comprometem a qualidade do exame, além de elucidar as ferramentas básicas para manipulação das imagens. Métodos: foi realizada uma revisão por meio de busca na base de dados PubMed, que encontrou 19 artigos publicados de 2008 a 2016. Resultados: é apresentada uma maneira otimizada de avaliação de todo o volume da imagem, bem como as principais alterações encontradas em cada região. (AU)

Manifestações orais decorrentes da quimioterapia em crianças de um centro de tratamento oncológico / Oral manifestations of chemotherapy in children from a cancer treatment center

Objetivo: Identificar as manifestações orais em pacientes pediátricos em tratamento quimioterápico de um Centro de Tratamento Oncológico de Teresina-PI e correlacioná-las com a qualidade da sua saúde oral. Métodos: A amostra desta pesquisa consistiu de 24 crianças entre seis e 12 anos de idade. Durante os meses de junho a julho de 2010, foi aplicado um questionário com perguntas objetivas e subjetivas, direcionado ao paciente e seu responsável, para a coleta dos seguintes dados: idade, gênero, tipo de câncer, sinais e sintomas das manifestações bucais apresentadas após a quimioterapia e hábitos de higiene bucal. Realizou-se, também, um exame clínico intrabucal nos pacientes, pelo pesquisador, para visualização das alterações na mucosa oral e classificar a sua saúde bucal em favorável ou desfavorável. Foram utilizados os testes estatísticos de correlação de Kendall´s, Spearman´s e para relacionar a saúde oral dos pacientes da amostra com as manifestações orais encontradas. Resultados: Os resultados encontrados mostraram que a idade média dos pacientes pesquisados foi de 8,5 anos; o gênero masculino (75,0%) foi predominante na amostra; a neoplasia maligna mais incidente foi a leucemia (50,0%); 83,3% dos pacientes apresentaram pelo menos uma manifestação oral, sendo a mucosite de maior prevalência (62,5%), seguida da xerostomia (54,1%), disfagia (50,0%), disgeusia (45,8%), candidíase (41,6%), sangramento gengival (25,0%), herpes labial (25,0%) e odontoalgia (12,5%). Encontraram-se 28,6% dos pacientes com saúde bucal favorável e 71,4% deles com saúde bucal desfavorável, os quais todos estes apresentaram complicações orais da quimioterapia. Conclusão: As manifestações orais dos pacientes submetidos à quimioterapia do Centro de Tratamento de Teresina no período estudado foram diversas: mucosite, xerostomia, disfagia, disgeusia, sangramento gengival, candidíase, herpes labial e odontoalgia. Os efeitos colaterais na cavidade oral do pacientes foram associados à presença de uma saúde bucal desfavorável.

Objective: identify the oral manifestations in pediatric patients caused by chemotherapy at a Cancer Treatment Center in Teresina, PI, Brazil and correlate them with the quality of oral health. Methods: The sample of this research consisted of 24 children between 6 and 12 years. From June to July, 2010, a questionnaire directed to the patients and their parents/caregivers, with subjective and objective questions, was applied for collecting the following data: age, gender, type of cancer, signs and symptoms of oral manifestations presented after chemotherapy, and oral hygiene habits. Intraoral clinical examination of patients was performed by the researcher, to detect the changes in the oral mucosa caused by chemotherapy and classify their oral health as favorable or unfavorable. Kendall's, Spearman's and Pearson's statistical tests were used to correlate the oral health of the patients with the found oral manifestations. Results: The results showed that the mean age of the patients was 8.5 years; the male gender (75.0%) was prevalent in the sample; the most frequent malignancy was leukemia (50.0%); 83. 3% of patients had at least one oral manifestation, mucositis being the most prevalent (62,5%), followed by xerostomia (54.1%), dysphagia (50.0%), dysgeusia (45.85), candidiasis (41.6%), gingival bleeding (25.0%), herpes labialis (25.0%) and toothache (12.5%). Favorable and unfavorable oral health was found for 28.6% and 71.4% of the patients, respectively, and all of them presented oral complications due to chemotherapy. Conclusion: The oral manifestations of the patients at Teresina' cancer treatment center within the studied period were diverse: mucositis, xerostomia, dysphagia, dysgeusia, gingival bleeding, candidiasis, herpes labialis and toothache. Side effects in the oral cavity of these patients were associated with the presence of an unfavorable oral health.

Estudo da frequência e localização de achados incidentais da região maxilofacial de diferentes campos de visão em exames de tomografia computadorizada de feixe cônico / Study of the frequency and location of incidental findings of the maxillofacial region in different fields of view in CBCT scans

A possibilidade de obtenção de imagens em três dimensões com a Tomografia Computadorizada de Feixe Cônico (TCFC) aumentou, sobremaneira, a capacidade de diagnóstico e planejamento odontológico. Exames de TCFC cobrindo toda a região maxilofacial permitem a detecção de lesões e anomalias fora da área específica de interesse. A avaliação minuciosa do exame nos permite a constatação de achados incidentais com ou sem significado clínico. São considerados como achados incidentais, imagens descobertas não relacionadas com o propósito original do exame e incluem variações anatômicas, anomalias, lesões benignas ou malignas. Neste estudo, avaliou-se o tipo, frequência e localização de achados incidentais na região maxilofacial de exames tomográficos, e a relevância clínica dos achados foi classificada quanto à necessidade ou não de acompanhamento, tratamento ou encaminhamento para um profissional especializado. Foram avaliados 150 exames de TCFC, divididos de acordo com o tamanho do FOV (campo de visão) em três grupos: maxila 6cm, mandíbula 6cm e maxila/mandíbula 13 cm. Os achados incidentais foram categorizados em 6 zonas: vias aéreas, ATM, osso, lesões dos maxilares, dente e calcificações de tecido mole. Os resultados mostram 560 achados incidentais que foram encontrados em 92% da amostra avaliada, sendo 225 nos exames onde o FOV abrangia maxila, 99 na mandíbula e 236 na maxila/mandíbula. Os achados incidentais foram mais frequentes na zona de dente, com 27,32% dos achados, seguida pelas vias aéreas com 24,46%, calcificações de tecido mole com 20,53%, ATM com 16,42%, 7,32% osso, lesões dos maxilares 1,96% e outros achados também com 1,96%. Foi constatado ainda que: 43,46% dos achados incidentais não necessitaram de tratamento ou encaminhamento para outro profissional, 28,97% necessitaram da aquisição de novas imagens para acompanhamento e 27,57% necessitaram de tratamento ou encaminhamento. Este estudo confirmou a alta frequência de achados...

The ability to obtain images in three dimensions with Cone Beam Computed Tomography (CBCT) has greatly increased the ability for dental diagnosis and planning. CBCT exams covering all the maxillofacial areas allow the detection of abnormalities and lesions outside the specific area of interest. A thorough evaluation of the exams allows for the discovery of incidental findings with or without clinical significance. Discovered images unrelated to the original purpose of the examination are considered incidental findings and include anatomical variations, anomalies, benign and malignant lesions. In the present study, the type, frequency and location of incidental findings in the maxillofacial region of CBCT scans were evaluated, and the clinical relevance of the findings were classified as requirement or not monitoring, treatment or referral to a specialist. Evaluated were 150 CBCT exams, divided according to the size of the FOV (field of view) into three groups: 6cm maxilla, 6cm mandible and 13 cm maxilla/mandible. The incidental findings were categorized into six areas: Airway, ATM, bone, lesions of the jaws, teeth and soft tissue calcifications. The results show 560 incidental findings that were found in 92% of the sample studied, with 225 exams where the FOV covered just the maxilla, 99 in the mandible and 236 in the maxilla/mandible. The incidental findings were more frequent in the tooth zone, with 27.32% of the findings, followed by airways with 24.46%, soft tissue calcifications with 20.53%, ATM with 16.42%, 7.32% bone, 1.96% lesions of the jaw and 1.96% other findings. Also found were that 43.46% of the incidental findings did not need treatment or referral to another professional, 28.97% required the acquisition of new images for monitoring and 27.55% needed treatment or referral. The present study confirmed the high frequency of incidental findings in CBCT scans. It was concluded that it is necessary to interpret and report the total volume...