ABH grouping of fresh and old dental pulp tissue by elution test

ABSTRACT

The ABH blood grouping was determined using the pulps of 293 teeth by theelution test. To ascertain whether or not the blood group of the extractedtooth would coincide with the actual blood group of the individual, the bloodgroups of teeth donors were identified by blood examination and used asreference samples. One hundred and twenty seven teeth were examined byelution test in the fresh state immediately after extraction, the remainingteeth [166] were left standing at room temperature and divided according tothe lapse of time after extraction into 3 groups of 49, 51 and 66 teeth to beexamined 1 to 6, 7 to 12 and 13 to 18 months after extraction, respectively. The results revealed that, in all fresh samples, there was completeconcordance between blood grouping results by elution test and those by bloodexamination giving 100% conclusive results. While in dental pulps examinedwithin 18 months after extraction, conclusive results were obtained in 93.9%,92.2% and 97% of samples examined within 6, 12 and 18 months after extraction,respectively