The use of electronic devices is increasing tremendously due to our maximized dependence on technology in our day to day lives. There has been a transformation in the way we live and communicate due to the increase in usage of mobile phones in recent years. As the electronic devices take a significant part of our life, the risks related to chemicals in batteries and cables carrying high tension current are an issue and present possible danger to ordinary life. The risk increases with low quality products and user negligence. However, the advantages of mobile phones outweigh the disadvantages. The use of mobile phone causes unfavourable health effects including changes in brain activity, reaction times, and sleep patterns. Research continues to confirm these findings. When mobile phones are used very close to some medical devices (including pacemakers, implantable defibrillators, and certain hearing aids) there is the possibility of causing interference with their operation. In the literature there is limited information about injuries caused by battery explosions. These type of injuries ranges from minor burns to explosions causing death. Mobile phone explosion causing facial burn injuries, corneal and orofacial soft tissue injuries, facial bone fractures, neck, upper trunk and upper extremity injuries, facial nerve palsies has been reported in the literature. In this case report we present a case of a mobile charger explosion resulting in coronal fragment fracture of maxillary anterior teeth along with minor injuries to face; treated for fragment reattachment by biological restoration.

Intraoral examination revealed an Ellis class-III fracture of 21 and 22 in an oblique direction from labial to palatal side with subgingival fracture line. However, the fractured segment was still attached with grade II mobility. Local anaesthesia was administered and the mobile fractured segment was separated and removed in the emergency trauma care unit. The fractured coronal fragment was stored in saline to prevent dehydration. Immediate root canal therapy was carried out on 21 and 22 the next morning at OPD, Dept of Dentistry, VSS Institute of Medical Sciences and research . Because the fracture line was apical to the bony crest, crown lengthening using aser [PICASSO AMD Soft Tissue Diode Lasers, 980 nm]was carried out to expose the edges of the root surface on the palatal side. Post space was made on the two teeth with corresponding drills to receive light transmitting post. The prefabricated fibre post [COLTENE] was checked in the canal for adaptation. After isolation, root canal walls were etched with 35% phosphoric acid for 20 seconds, rinsed and dried with paper points. The pulp chamber and the fitting surface were similarly etched and primed in the fragments. The fractured tooth fragment was then verified for a fit with the tooth to ensure proper adaptation. Flowable composite was then applied to the pulp chamber area and the fragments were aligned to have a proper fit. The excess cement was removed and polymerization was done from all the sides of tooth. The patient was instructed to avoid exerting heavy function on anterior teeth. Immediate postoperative clinical assessment presented adequate aesthetic results with restored functionality. Follow up appointment of 15 days, 1 month, 3 months and 6 months clinical and radiographic examination showed stable reattachments, good periodontal health and clinically acceptable results