This study highlights the importance of revisiting conventional rehabilitation strategies for communicative deficits and tailoring them according to the patient's needs and preferences. It also emphasises that besides excellent observation skills, clinicians must be willing to consider technology based approaches in patients responding poorly to traditional approaches in order to develop effective interventional programmes. Implication for Rehabilitation The current study highlights the importance of exploring the application of technology based intervention for building communication skills in the early stages of rehabilitation for persons with communicative deficit. It also emphasises the need for excellent observation skills among clinicians so that the peculiar interests of children with ASD may be applied in designing training programmes to overcome communication barriers. Additionally, clinicians should familiarise themselves with the latest assistive technology-based rehabilitation approaches and be willing to explore newer approaches if traditional ones fail to yield satisfactory outcomes. Use of technology-based interventions to reduce dependence among persons with disability would be beneficial, both socially and economically, in developing countries with limited resources.
Objective: Previous studies reported that bleaching agents are capable of altering the outer enamel or exposed dentine surfaces. In this study, transmission electron microscopy (TEM) characterisation in combination with energy dispersive x-ray spectroscopy (EDS) elemental mapping was performed to investigate the effect of hydrogen peroxide (HP) on the sub-surface of tooth structures. Materials and Methods: Bovine incisors (n=6) were assigned to three groups for treatments: 30% H 2 O 2 pH 3, 30% H 2 O 2 pH 7 and 1M sodium hydroxide (NaOH) for 16 hours. Samples were exposed to direct treatment with agents to allow easy access of the agents and uniform treatment across the entire sample sub-surfaces. Specimens were immersed in Karnovsky's fixative for three days, embedded in epoxy and polished. Using focussed ion beam (FIB), samples were milled ~50-100 µm below the treated polished surface to feature the ultra-fine structures for TEM analysis. Results: Enamel rods, inter-rods and crystalline structures within rods were discerned for sound and H 2 O 2 treated enamel. No structural difference in the mineral dense peritubular region or fibrous protein rich inter-tubular dentine was observed after acidic or neutral H 2 O 2 treatment. A complete loss in the structural integrity of enamel rod was observed after NaOH treatment for 16 hours without having any impact on dentine structure. Conclusions: TEM analysis produced high quality sub-surface images of tooth structures and revealed no deleterious effect on the structural integrity of the sub-surface enamel or dentine after direct bleaching with hydrogen peroxide.
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