Objective. To associate radiographic and histopathological features of pericoronal follicles (PFs) of asymptomatic impacted teeth and evaluate cell proliferation and apoptosis in the epithelium. Study Design. Epithelium and mesenchyme of radiographically normal (NPF ≤ 2.5 mm) and hyperplastic (HPF 2.6 to 5 mm) PF (n = 140) were studied histologically. Cell proliferation (PI) and epithelial apoptosis were evaluated by Ki-67 and bcl-2 expression in 14 NPFs and 10 dentigerous cysts (DCs). Results. Radiographically, 127 were NPFs and 13 were HPFs; 87.8% of total PFs exhibited epithelium on the surface. Reduced enamel epithelium was observed in 78 (61.4%) NPFs and 6 (46.2%) HPFs, squamous metaplasia in 17 (13.4%) NPFs and 4 (30.8%) HPFs, and cystic epithelium in 15 (11.8%) NPFs and 3 (23%) HPFs. Mean PI was 1.97 ± 1.25 and 7.97 ± 1.74 in the epithelial component of NPF and DC, respectively; bcl-2 positive expression was observed in 9 (64.3%) NPFs and 7 (70%) DCs. Conclusion. The scant epithelial remnant proliferation could imply low risk for development of odontogenic pathologies in the absence of an additional stimulus.

Anterior mandibular dislocation (AMD) is defined as the displacement of the condylar head out of the glenoid fossa beyond the articular eminence, and that does not reduce spontaneously to its normal position. The Hippocratic method is the usual approach for condylar repositioning at most health centers although it is perceived by the patient as an unpleasant, brusque technique and outcomes are not always favorable. Objective: The aim of this work is to describe a new simplified nontraumatic manual technique and its application in a series of cases. Method: A procedure based on gently and constantly guiding the patient's mouth opening and closing movements is described in detail. Results: Forty-two patients were treated with a treatment success rate of 100%, and no pain associated with the procedure. Procedure time was 1.5-7 min in 40 of the 42 treated cases. Conclusion:The procedure presented here is an improvement on the original technique: it is simple, fast, effective, can be performed in any setting, and avoids use of brusque force, which is the factor that causes the patient most discomfort and fear.

El quiste óseo simple (sinonimia quiste óseo traumático, quiste óseo solitario, quiste óseo hemorrágico) es un pseudoquiste intraóseo desprovisto de recubrimiento epitelial con un contenido seroso y/o hemático que en ocasiones puede estar ausente. Es una patología poco frecuente que afecta a los huesos maxilares con predilección por el maxilar inferior. El objetivo del presente trabajo es presentar un caso de quiste óseo simple en maxilar inferior que difiere de los habitualmente encontrados en los huesos maxilares en cuanto a su presentación clínica, radiográfica e histopatológica.

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