beta-TCP Versus Autologous Bone for Repair of Alveolar Clefts in a Goat Model.

Item does not contain fulltextObjective : The aim of this study in goats was to test the hypothesis that a novel synthetic bone substitute beta tricalcium phosphate (beta-TCP) can work as well as autologous bone harvested from the iliac crest for grafting and repair of alveolar clefts. Design : Ten adult Dutch milk goats ( Capra hircus ) were used in a split-mouth study design. Main outcome measures : Volumetric histologic assessment of new bone formation and radiographic measurement of orthodontic movement of teeth in a formerly created alveolar cleft. Conclusions : The synthetic bone substitute beta-TCP was shown to result in bone healing similar to that of iliac crest bone. The surgical, orthodontic, and histologic results now warrant the testing of beta-TCP in the human cleft situation.1 november 201

Dimensões nasofaringeanas e faciais em diferentes padrões morfológicos Nasopharyngeal and facial dimensions of different morphological patterns

OBJETIVO: o presente estudo propõe-se a comparar as dimensões da nasofaringe e as características esqueléticas avaliadas por exame cefalométrico, em indivíduos com padrões morfológicos distintos. MÉTODOS: foram utilizadas 90 telerradiografias de pacientes de ambos os gêneros, de 12 a 16 anos de idade, as quais foram igualmente divididas em três grupos distintos, referentes aos padrões morfológicos - braquifacial, mesofacial e dolicofacial. Foram realizadas medições específicas da região nasofaringeana (ad1-Ptm, ad2-Ptm, ad1-Ba, ad2-S0, (ad1-ad2-S0-Ba-ad1/Ptm-S 0-Ba-Ptm) X 100, e Ptm-Ba) e relativas ao padrão esquelético da face. RESULTADOS: observou-se que os pacientes dolicofaciais apresentaram menor profundidade sagital óssea (Ptm-Ba) e da via aérea da nasofaringe (ad1-Ptm e ad2-Ptm). Sugere-se que essas diferenças estejam relacionadas a um posicionamento relativamente mais posterior da maxila, comum a esses pacientes. Todavia, não foram detectadas diferenças quanto à espessura de tecido mole na parede posterior nasofaringeana (ad1-Ba e ad2-S0), ou à sua proporção em relação a toda a área delimitada para a nasofaringe [(ad1-ad2-S0-Ba-ad1/Ptm-S 0-Ba-Ptm) X 100]. CONCLUSÃO: sugere-se, portanto, que as características faciais de excesso vertical encontradas em pacientes dolicofaciais podem ocorrer, dentre outros fatores, em virtude da obstrução da via aérea nasofaringeana, uma vez que tais dimensões se apresentaram menores para os dolicofaciais.<br>OBJECTIVE: The purpose of this study was to compare the dimensions of the nasopharynx and the skeletal features-evaluated by cephalometric examination-of individuals with different morphological patterns. METHODS: Were used cephalometric radiographs of 90 patients of both genders, aged 12 to 16 years, which were also divided into three distinct groups, according to their morphological patterns, i.e., brachyfacials, mesofacials and dolichofacials. Measurements were performed of specific nasopharyngeal regions (ad1-Ptm, ad2-Ptm, ad1-Ba, ad2-S0, (ad1-ad2-S0-Ba-ad1/Ptm-S 0-Ba-Ptm) X 100, and Ptm-Ba), and relative to the facial skeletal patterns. RESULTS: Dolichofacial patients were found to have lower than average bone depth sagittally (Ba-Ptm) and lower nasopharyngeal airway depth (ad1-Ptm and ad2-Ptm). Arguably, these differences are linked to a relatively more posterior position of the maxilla, typical of these patients. No differences were found, however, in the soft tissue thickness of the posterior nasopharyngeal wall (ad1-Ba and ad2-S0), or their proportion in the whole area bounded by the nasopharynx ((ad1-ad2-S0-Ba-ad1/Ptm-S 0-Ba-Ptm) X 100). CONCLUSIONS: We therefore suggest that the excessively vertical facial features found in dolichofacial patients may be the result, among other factors, of nasopharyngeal airway obstruction, since such dimensions were shown to be smaller in dolichofacials