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roots - international magazine of endodontology No. 2, 2016

| feature unusual endodontic treatment 32 roots 2 2016 Apartfromtheextra-longendodonticfilesandvet- erinary paper points especially developed for the treat- ment of animals, all materials used during the surgery were common dental products, which can be found in everyhumandentalsurgeryaswell.Forthefirstrinsing of the canal NaOCI 0.5 % was used. Amongst other thingsevenshortbladesofgrassandafishbonewere discovered in the root canal system. After the canal had been cleared of all debris and necrotic tissue, the irrigation protocol was finalised with CanalPro NaOCI 6 % and sterile saline. Before obturation the canal was thoroughly dried with the above-mentioned paper points and thin sterile cotton sticks. Reliable filling in tough conditions In order to create a permanent, durable filling, the veterinarian eventually needed a modern filling sys- tem with excellent flow properties. Swiss dental spe- cialist COLTENE recently introduced an intelligent obturation material that is quick to use with process times of only 10 to 15 minutes. GuttaFlow bioseal combines fluid gutta-percha with a suitable sealer at roomtemperature.Thebioactivematerialtherebyac- tivelysupportstheregenerativeprocessesinthetooth. In contact with fluids, it provides natural repair com- ponents such as calcium and silicates. It furthermore sets in motion corresponding biochemical processes thatprovideadditionalsupportintheregenerationof therootcanal.Aftercuringtheinnovativematerialcan formso-calledhydroxylapatitecrystalsonthesurface. Thesecrystalsimproveadhesionsignificantlyandhelp to stimulate the regeneration of bone and dentin tis- sueinparticular.Untilnow,onlydentalmaterialssuch asMTAorbioglassexhibitedsimilarregeneration-sup- portingproperties.However,thedisadvantageofthese traditionalmaterialsisprimarilytheirlongcuringtime or complicated handling. Thecatalyticeffecttriggeredbythespecialcompo- sition of GuttaFlow bioseal was exploited in order to createalong-lastingsolutionforadenturethatisex- posedtoanenormousmasticatoryforce.Dimensions in the anatomy of a full-grown polar bear are slightly different to those of the human body, too. A feline urinary catheter was adjusted to prolong the mixing tip of the gutta-percha syringe in order to reach fur- ther down the canal. Whereas dentists use less than 1 mlofmaterialonhumanpatients,practicallyhalfof the content of a 5 ml automix syringe had to be used to fill the root canal system. After the root canal has been securely sealed with GuttaFlow bioseal and a thinlayerofglassionomer,therestorationwastopped off with a composite built up. The dual-curing bulk composite Fill-Up! allowed to fill the two access cav- itiesveryquicklyandefficiently.Light-curingonlyre- quired5secondsandthemarginalintegritywashigh due to the low shrinkage forces. In Lars’ case it was again vital to use materials that are fast to apply, but yet reliable and robust enough to defy comparatively tough conditions. Using dental material on carni- voresandlargeanimalscanbecomearealendurance test for the substances employed in the restoration. The veterinary dentist in charge was thus looking for high-qualityproductswithaproventrackrecordthat would meet those strong criteria. A promising prognosis After three hours the polar bear finally got off the operatingtableagain.Twomonthslater,anothersur- gerywasscheduledtoperformarootcanaltreatment inhissecondbrokenfang.Thistimethepulpchamber wasaccessedimmediatelyfromthemesialsideofthe toothbecausetheteamalreadyknewabouttheprob- lem the long, curved root canals posed. On the one hand this procedure helped to reach the pulp cham- ber much quicker, on the other hand the removal of more dentin naturally weakens the tooth. Again, an extra reliable and strong filling material was needed to create a durable solution. The masticatory forces working in the mandible of a polar bear even chal- 22016

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