This study aimed to determine the incidence and contributing factors to pulpal and periapical disease in crowned vital teeth. Seventy-three pairs of healthy teeth were included and divided into two groups; 'crowned' and 'untreated' groups. The crowned group was prepared for full coverage crown and no treatment was carried out on the untreated group. Both groups were subjected to clinical and radiographic examination to detect endodontic signs and symptoms pre-operatively and one-week after crown cementation. Electric pulp test was also subjected to both groups, pre-operatively, after tooth preparation and before crown cementation. The incidence of pulpal and periapical disease was 6.8% and 1.4%, respectively, after tooth preparation. Factors associated with pulpal and periapical disease were exposed pulp during tooth preparation and pre-operative bone level <35%. Despite the low incidence, the occurrence of pulpal and periapical disease within a short period is noteworthy.This was a prospective matched cohort involving patients from the Faculty of Dentistry, Universiti Kebangsaan

PurposeTo investigate immunoglobulin E (IgE)-mediated hypersensitivity to chlorhexidine (CHX), and association between CHX exposure and serum specific IgE (SIgE) levels, among first-year dental students. MethodsParticipants completed a questionnaire on medical health, history of allergies/hypersensitivities and CHX exposure. A sample of venous blood (3 mL) was drawn and subjected to SIgE test to CHX; sensitisation defined as SIgE level of ≥0.10 kU A /L. ResultsFifty-eight (98.3%) participants, consisting of 69% (n = 40) female with a mean age of 21, were recruited; three quarters (84%) reported no known health issue, and over half had no history of allergies (57%); less than 20% reported having had exposure to CHX-containing products with the majority from toothpaste (9%) and mouthwash (12%). The CHX SIgE test showed that 8.6% (n = 5) were sensitised. No association between CHX exposure history and the level of SIgE antibody was noted. ConclusionsAlthough most participants reported no known exposure to CHX, 8.6% showed CHX sensitisation suggesting unknown exposure and the potential risk of developing hypersensitivity and adverse reactions in the future. This is a preview of subscription content, log in to check access. Access optionsInstant access to the full article PDF. Price includes VAT for MalaysiaIgE-mediated hypersensitivity to chlorhexidine among first-year dental students | SpringerLink https://

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Radix entomolaris is a supernumerary root located distolingually on permanent mandibular molars. It is considered as an anatomical variant and usually curved buccolingually. The presence of radix entomolaris can be endodontically challenging to treat and susceptible to endodontic mishaps such as ledge. This report describes the management of ledge in a radix entomolaris with type-3 curvature on tooth 46. Ledge was bypassed using pre-curved K-files #10, #15, and #20 sequentially and preparation was continued using step-back technique. Then, the root canal was obturated using gutta percha and root canal sealer. Diagnostic and clinical challenges in managing radix entomolaris, and prevention and management of ledge were also discussed.

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