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Introduction: Deep bite is common finding in different malocclusions and it is frequently treated by intrusion of incisors. This creates stress areas in the dento-alveolar region. It is important to study the response of dental tissues to orthodontic forces and the resultant effect to minimize risk of tissue damage. Finite element model is an effective method to understand this biomechanical scenario. Aim: To study the effect of intrusion utility arch in anterior maxillary dento-alveolar region. Materials and Methods: FEM of maxillary dento-alveolar region. Intrusion scenario of 4 incisors using intrusion utility arch was simulated. The effects on PDL, tooth and alveolar bone were analyzed. Result: Maximum tensile stresses are in the cervical region of labial surface of incisors, PDL and alveolar bone which are becoming compressive at apices. Conclusion: Above method is found safe for PDL and alveolar bone but suggested susceptibility to root resorption.

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<p>Rickets is a defect of bone mineralization caused by vitamin D deficiency, seen most significantly at growth plates that result in radiological bony abnormalities like metaphyseal flaring and cupping, physeal widening with focal and generalised osteomalacia.<strong> </strong>Here we present a rare case of 7 years old male, a case of vitamin D3 deficiency rickets in a known case of multi drug resistant pulmonary tuberculosis.  The patient had suffered left proximal fibular fracture following trivial fall 1.5 month back and had delayed bony union leading to difficulty in walking and pain. The patient was treated with oral vitamin D supplementation. In vitamin D deficiency rickets, there is decreased bone mineralization leading to weak bones and delayed fracture healing in children. Low serum vitamin D levels also caused decreased immunity with increased susceptibility to respiratory infections like pulmonary tuberculosis. Appropriate treatment with injectable or oral vitamin D3 with adequate exposure of sunlight and proper nutrition is the best modality of treatment.<strong></strong></p><p><strong> </strong></p>