Beatriz Farias Vogt

Dentin penetrability evaluation of three different dyes in root-end cavities filled with mineral trioxide aggregate (MTA)

The purpose of this study was to evaluate the penetration of three dyes in MTA root-end fillings. In 30 single-rooted teeth, cavities for retrofilling were prepared with an ultrasound appliance and filled with MTA. The specimens were randomly assigned to three groups (n = 10) and immersed in the following solutions: 2% methylene blue (MET), 50% silver nitrate (NIT) and 0.2% rhodamine B (ROD). Two transversal slices (1 mm) of the retrofilling region were obtained and evaluated using the Image Tool 3.0 software to obtain a quantitative evaluation (in mm2) of the dye penetration around the retrofillings. Data were submitted to statistical analysis using Students t-test. The lowest degree of dye penetration was observed for the NIT group, in both slices (p < 0.05). Dye penetration was significantly larger in the ROD group when compared to the NIT group, in both slices (p < 0.05), and to the MET group, only in slice 1 (p < 0.05). Within the limitations of this study, it was concluded that the choice of dye could influence the penetration evaluation in root-end filling studies, and that the NIT had the lowest penetration capacity in the apical dentine.

Spontaneous Migration of Third Molar Following Displacement to Pterygomandibular Fossa

The accidental displacement of lower third molars or root fragments into fascial spaces is rare; when it does occur, the most affected anatomic sites are the submandibular and pterygomandibular spaces. Causes and possible complicaions are widely discussed in the literature. The position of he tooth directed toward the lingual or distal face, a thin ingual cortex, application of excessive force, inapproprite instruments, and inadequate examinations are factors hat may contribute to the occurrence of displacement. Injury to tissues, pain, swelling, lockjaw, and foreign body reaction are some of the related complications, along with the medical-legal implications. Thus, patient history and linical and imaging examinations must be rigorously evalated to establish the best planning of the surgery and void the occurrence of accidents and possible surgical omplications. The oral surgeon must be familiar with the treatment nstituted in these cases, because the surgeon is always esponsible for the resolution of the case, even when the urgeon was not the one who performed the extraction. his case report describes a lower third molar accidentally isplaced to the pterygomandibular space and discusses spects regarding the diagnosis and treatment of such acidents in light of the current literature.

Chondroma in temporomandibular region—case report and therapeutic considerations

PurposeChondromas are benign tumors composed of mature hyaline cartilage. These tumors are quite common in the bones of the hands and feet but extremely rare in jaw bones, and few such cases are reported in the literature. The aim of the present study was to carry out a literature review and present a clinical case of a patient with a chondroma in the right mandibular condyle treated with excision of the tumor.ConclusionsThe importance of early diagnosis and treatment in order to impede or minimize any lasting effects is discussed.

Multidisciplinary approach in the immediate replantation of a maxillary central incisor - A six and a half year follow-up

This report proposes a discussion of the various peculiarities of a tooth 21 replantation in a 9-year-old patient and describes different treatment facets and a 6-year follow-up of the case. The splint was maintained for a 3-month period. After a 1΍ year therapy with calcium hydroxide to control inflammatory resorption, the final canal obturation was performed 18 months after trauma with mineral trioxide aggregate. Two years after replantation, the orthodontic treatment had been initiated and 5 years after avulsion, whitening of tooth 21 was also done. Clinical and radiographic follow-up at regular intervals revealed that the treated tooth was still functional, showing normal mobility, resorption stabilization, and normal appearance of the bone tissue and lamina dura, testifying the treatment has been so far successful. The possibility of submitting avulsed teeth to other dental treatments once, there is close professional monitoring by controlling the risks and benefits of each therapy, as well as the patient′s cooperation, extra-oral time, and storage media for transport to the dentist among other details is emphasized.