Novel acrylated alkoxysilane castor oil with hydrolysable –Si–OCH3 was synthesized via free radical copolymerization. This silane functional castor oil was further reacted with isocyanate to get isocyanate terminated silica hybrid polyurethane–urea prepolymer.

Compromised teeth are challenging to the dentist which complicate the treatment plan which affects the long-term prognosis. Maxillary molars showing untreatable endodontic failure, periodontal attachment loss, extensive carious involvement or fractures involving the furcation area are often difficult to manage. Treatment option for such multi-rooted teeth can be root resection, or extraction and prosthetic replacement. Root resection procedure offers an economically viable treatment option for the patients to preserve the natural tooth. This article highlights 2 case reports of root resection in maxillary molar with different etiologies combined with the periodontal approach and prosthetic management with resultant successful oral rehabilitation.

Management of maxillary first molar with aberrant anatomy is a endodontic challenge, careful observation of periapical radiograph is a must to ensure clinical success. CBCT should be used for knowing canal architecture properly and to avoid any perforations. In this case report endodontic therapy of left maxillary first molar was done after careful analysis of CBCT images and perforation repair was done using MTA.

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