ABSTRACT
A Displasia ectodérmica é uma doença rara de origem congênita, caracterizada pelo comprometimento de estruturas derivadas do ectoderma. Os indivíduos portadores de Displasia ectodérmica apresentam como sinais clínicos: hipotricose, hipohidrose e anormalidades cranianas. As manifestações orais mais frequentes são a oligodontia ou anodontia, atraso na erupção e anomalias de formas dentárias, além de hipoplasia de esmalte e deficiência no desenvolvimento do processo alveolar. O objetivo neste artigo é relatar dois casos de displasia ectodérmica, enfatizando suas características clínicas e radiográficas, bem como suas principais implicações odontológicas
The ectodermal dysplasia is a rare congenital disease characterized by the involvement of structures derived from ectoderm. Individuals who have ectodermal dysplasia have the following clinical signs: hypotrichosis, hypohidrosis and cranial abnormalities. The most common oral lesions are oligodontia or anodontia, delayed eruption and morphologic abnormality, as well as enamel hypoplasia and deficiency in the development of the alveolar process. The aim of this article is to report two cases of dysplasia, emphasizing their clinical and radiographic features, as well as their main dental implications
Subject(s)
Male , Female , Child, Preschool , Ectodermal Dysplasia , Genetics , MutationABSTRACT
ABSTRACT OBJECTIVE: To analyze and to quantify morphological acinar postmortem changes in rat sublingual glands (SLG). MATERIAL AND METHODSs: Fifty rats were divided into two groups of 25 animals each. Group I was used for morphological and morphometric evaluations and group II for the determination of gland density and processed gland volume. Acinar autolytic changes were studied at 0 (control group), 3, 6, 12 and 24 h postmortem periods. The morphometric analysis of the volume density (Vv) and total volume (Vt) of intact (ia) and autolyzed (aa) acini was performed under light microscopy using a Zeiss II integration grid with 100 symmetrically distributed points. RESULTS: Morphologically, temporal progressive nuclear alterations and gradual loss of the structural architecture of acinar cells were found. Regarding quantitative results, both the Vvaa and the Vvia showed statistically significant differences among all postmortem periods (p<0.05). Vvaa increased from 0.42 percent at 0 h to 75.84 percent at 24 h postmortem and Vvia decreased from 71.16 percent to 0 percent over the same period. For Vtaa and Vtia, no statistically significant differences occurred between 12-24 h and 0-3 h (p>0.05), respectively. Vtaa increased from 0.18 mm³ at 0 h to 38.17 mm³ at 12 h, while Vtia showed a decrease from 33.47 mm³ to 0 mm³ between 3-24 h postmortem. Data concerning Vtaa were adjusted by two-variable linear regression, obtaining the equation: y=-3.54 + 3.38x (r²=0.90). The Vtaa growth rate calculated by this equation was 3.38 mm³/h between 0-12 h. CONCLUSION: Acinar autolysis on rat SLG demonstrated the most significant signs during the first 6 h postmortem and was widely spread through the gland at 12 h.
Subject(s)
Animals , Male , Rats , Autolysis , Sublingual Gland/pathology , Organ Size , Rats, Wistar , Salivary Glands/pathology , Time FactorsABSTRACT
Cementoblastoma benigno é uma neoplasia odontogênica relativamente rara caracterizada, pela formação de uma massa de tecido semelhante ao cemento, em conexão com a raiz do dente. Radiograficamente está aderido à porção apical ou lateral da raiz e se apresenta como uma massa radiopaca densa, bem delimitada e circundada por um halo radiotransparente fino e uniforme. Neste artigo, os achados clínicos e radiográficos de um caso de Cementoblastoma benigno são apresentados.
Benign cementoblastoma is a relatively rare odontogenic neoplasm characterized by the formation of a mass of cementum-like tissue, connected to the root of the tooth. Radiographically, it is attached to the apical or lateral root and presents as a well-defined, dense radiopaque mass, surrounded by a thin and uniform radiolucent halo. In this article, the clinical, radiographic and therapeutic features of a case of benign cementoblastoma are presented.