Canal Morphology of Maxillary Molars: Clinical Observations of Canal Configurations


Date: 11/1999
Journal: JOE



to determine the effect of various instruments/ techniques on the detection of canals in MAX molars. And to record the relationship  of canals to each other.

•N= 1st 1096, 2nd  611, and 3rd 25 . Inclusion : No. of canals(1, 2, 3, or 4), vital, necrotic and retreatment cases.


•Data was obtained from patients’ files  treated from July 1989 to December 1997.

•Rhomboidal access was made, irrigation with 2.5% warm NaOCl, sometimes 17% EDTA. Solvent and/or instruments used in ReTX cases. troughing with burs/ultrasonic was used sometimes in ReTX cases.

•Vision aids: 1st 2 years surgical telescope (X2.5,X4.0) with fiberoptic light or headlamp, later DOM used and in last 18 months in all cases.

•Canals were considered joined if paper point/capillary tip inserted in one canal reduced fluid in the other.

•Obturation with vertical compaction and Kerr Pulp Canal Sealer EWT.

•For each tooth: type, # canals, joined or not, if instrumented to terminus, status of pulp. (2-1-2 canals were considered as separate, MB2 present if  3-4 mm could be instrumented).

Most highlighted Results:

•Higher incidence of MB2 in MAX 1st molar and joined canals in MAX  2nd molar.

•Use of DOM significantly increased # of canals found by 10%.