Effect of photobiomodulation on the stability and displacement of orthodontic mini-implants submitted to immediate and delayed loading: a clinical study.

The aim of this study was to evaluate the effect of photobiomodulation (PBM) on the stability and displacement of orthodontic mini-implants (MIs) submitted to loading. Forty-eight and 35 mini-implants (1.5 × 8 × 1 mm) were assessed for stability and displacement, respectively (19 patients). MIs were allocated according to the intervention in 1-PBM + immediate loading (IL), 2-PBM + delayed loading (DL) (four weeks after implantation), 3-IL only, and 4-DL only. PBM (Therapy XT, DCM) was implemented using a red emission (660 nm, 4 J/cm2, 0.1 W, 20 s) immediately after implantation (day 0) and infrared emissions (808 nm; 8 J/cm2, 0.1 W, 40 s) in the following appointments every 48-72 h during two weeks (days 2, 4, 7, 9, 11, and 14). Loading of 150 gF was applied during three months for all MIs. The stability was assessed by resonance frequency analysis (Osstell ISQ), and images from Cone beam computed tomography were evaluated to determine the amount of the displacement of the MI's head. MIs from the PBM groups presented lower loss of stability (P = 0.0372). When the analysis considered the loading protocol as an additional variable, group two showed the lowest loss of stability, being significantly different from groups that did not receive PBM (P = 0.0161). There was no difference between groups two and four during the period without loading (P > 0.05). DL groups presented lower loss when the effective period of loading was assessed, independently of the application of PBM (P < 0.0001). All groups showed displacement of the MIs head without significant differences (P > 0.05). DL potentiated the effect of PBM, decreasing the loss of stability.

Idiopathic bilateral antral exostoses: A rare case in maxillary sinus.

INTRODUCTION: Exostoses in paranasal sinuses have been reported in the otolaryngology literature, but they have not been described in the dental literature to our knowledge. The aim of this article is to describe an idiopathic and rare case of bilateral exostosis obtained by cone-beam computed tomography. PRESENTATION OF CASE: The case shows a healthy and asymptomatic patient with a different size and form of exostoses in both maxillary sinuses. DISCUSSION: It is difficult to clinically diagnose the antral exostosis due the asymptomatic nature of this condition, unless the approach would be through endoscope. Sometimes this condition is related with nasal irrigants, however in this case the patient asserted not having used nasal irrigation ever; thus, it is impossible to relate this kind of treatment as a principal cause. CONCLUSION: The published data of exostoses in maxillary sinus seem to be limited in the dental literature, and this condition is important to consider in an implant treatment planning. Also, it is important to perform a follow-up of the cases in trying to find the possible causes of exostosis.

Quiste óseo traumático / Traumatic bone cyst

El quiste óseo traumático (QOT) es una cavidad en la mandíbula ósea no revestida por epitelio, siendo considerado un falso quiste. El propósito de los autores es el relato de un caso clínico, donde ha sido posible con una buena anamnesis y examen radiográfico convencional, obtener el diagnóstico más probable de la lesión como es QOT, que orientó toda la presentación del caso. La lesión ha disminuido y se estabilizó

Contribuição da radiografia panorâmica na detecção da ateromas em artéria carótida / Panoramic radiography contribuition on detection of carotid artery atheromas

Os acidentes vasculares cerebrais são freqüentemente causados pela presença de placas de gorduras na lubrificação da artéria carótida. Por serem calcificados, esses arteromas podem ser vistos em radiografias panorâmicas. Os pacientes são freqüentemente assintomáticos, porém apresentam histórias médicas positivas. Assim, este estudo demonstrou a importância da radiografia panorâmica na detecção precoce de ateromas em artéria carótida, através do relato de dois casos clínicos. Paciente 1: Sexo feminino, 67 anos, diabética, hipertensa e fumante, relatava dores à palpação no angulo da mandíbula. Paciente 2:Sexo feminino, 57 anos, apresentava osteoporose, colesterol alto e dores na ATM e pescoço. Em ambos os casos, as radiografias panorâmicas revelaram a presença de imagens compatíveis a nódulos de calcificação na artéria carótida. As pacientes foram encaminhadas ao médico que confirmou o diagnóstico através de exames especializados e iniciou o tratamento mais adequado para cada caso. Concluiu-se que a radiografia panorâmica contribui para a identificação dos pacientes assintomáticos com nódulo arteriais na região superior do pescoço, podendo reduzir a incidência de enfartes e acidente vasculares cerebrais