Dr. Carla Martins et al studied whether dental calculus formation is higher among patients with chronic kidney disease un­der­going hemodialysis than among controls. Also evaluated were the links between dental calculus formation and den­tal plaque, variables that are related to renal disease and/or sal­iva composition. The renal group included 30 pa­tients un­dergoing hemodialysis; the control group included 30 clinically healthy patients. Stim­ulated whole saliva and parot­id saliva were collected. Salivary flow rate and calcium and phosphate con­centrations were determined. The saliva col­lection was carried out before and af­ter a hemodialysis session for renal pa­tients. Both patient groups received in­traoral exams, or­al hygiene in­struc­tions, and dental scaling. The dental calculus was measured 3 months later by the Volpe-Man­hold method to de­ter­mine the rate of formation. It was found that the renal group presented a higher rate of formation (P < .01). Cor­relation was ob­served between the rate of dental calculus formation and whole saliva flow rate in the renal group after a hemodialysis session (r = .44, P < .05). The presence of dental calculus was as­sociated with phosphate concentration in whole saliva from the renal group (P < .05). In conclusion, patients undergoing hemodialysis presented accelerated dental calculus formation, probably due to salivary variables.

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(Source: Pediatric Nephrology. July 20, 2012)

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