The diagnosis and management of invasive cervical resorption.

UNLABELLED: A 23-year-old female patient presented complaining of sensitivity relating to LR4. She had good oral health and no history of trauma. Cone beam computed tomography, however, revealed advanced invasive cervical resorption (ICR) in LR4, as well as an incidental finding of ICR in LR6. CLINICAL RELEVANCE: CBCT proved essential in the diagnosis and treatment planning of this unusual case. Owing to the destructive nature of ICR, it is imperative to remove the entire lesion to avoid any chance of recurrence.

Management of open apex in a central incisor using mineral trioxide aggregate.

UNLABELLED: Trauma to an immature tooth can result in pulpal devitalization and arrested apexogenesis, resulting in open apices; this is most common in anterior teeth of the permanent dentition. The attainment of an apical seal in such cases is challenging. The management of an open apex in a central incisor in a 16-year-old male patient is described in this report. The satisfactory result achieved suggests that mineral trioxide aggregate (MTA) can be used successfully as a filling material in teeth with open apices. CLINICAL RELEVANCE: Preservation of anterior teeth following trauma is essential, especially in young patients. A good option is the use of mineral trioxide aggregate in the treatment of open apices.

Restoring function and aesthetics in a patient previously treated for amelogenesis imperfecta.

A 26-year-old male patient presented with generalised gingival recession related to the margins of crowns fitted between the ages of 12 and 15 years. The patient, previously treated for Amelogenesis Imperfecta, suffered a mandibular fracture at the age of 22 years. He had an anterior open bite and in the retruded contact position the 28 and 38 were the only teeth in contact. This case demonstrates the management of compromised fixed prosthodontic care following further growth and trauma. On completion of treatment a good functional and aesthetic result was achieved.

Ion release from experimental Au-Pt-based metal-ceramic alloys.

OBJECTIVE: The aim of the study was to assess the effect of individual metallic elements within experimental Au-Pt-based dental alloys for porcelain veneering on ion release. METHODS: A binary Au-10at% Pt alloy (AP10) was designed as a parent alloy. Six ternary AP10-X (X=In/Fe/Sn/Zn) and four quaternary (AP10-In2)-Y (Y=Fe/Sn/Zn) alloys containing oxide-forming elements, X and Y, up to 2at% were prepared and ion release from the experimental alloys in deionized water and commercial soft drink was examined. For ion release determination samples with size 10 mm x 10 mm x 0.5mm were immersed in 20 ml of deionized water for 5 min. Samples were then removed and immersed in 20 ml of Sprite Light for a further 5 min, and 2h at 37 degrees C. The amounts of ions released in the test solutions were analyzed by inductively coupled plasma-mass spectrometry. RESULTS: When looking at individual elemental ion release, the order of the amount of dissolved ions was Fe>Zn>In>Sn. Among the base metal elements examined, Fe showed significantly higher levels of ion release than the other base metal elements for all three testing conditions (P<0.05). When looking at the effects of test solution on ion release from the alloys, Sprite Light caused significantly higher level of ion release than deionized water, with the exception of In in the ternary AP10-In1.0 and AP10-In1.7 alloys and the quaternary (AP10-In2)-Sn1.0 alloy, which showed similar or slightly greater amounts of ion release into deionized water. SIGNIFICANCE: Significant ion release was only observed from the Fe element. Sn and In elements showed less ion release than the Fe and Zn elements. Accordingly, Sn and In elements should be recommended as oxide-forming elements in Au-Pt-based metal-ceramic systems.

Magnetic retention for obturators.

Prosthetic rehabilitation can be challenging in cases of maxillectomy or developmental defect. This article describes a case in which a magnetically retained, implant-supported denture was used to restore the maxilla following hemi-maxillectomy. Use of the Oral Health Impact Profile before and after treatment showed a marked diminution in the number of adverse impacts 2 weeks post-placement and during review 6 months later.