Root canal anatomy of mandibular second molars. Part II C-shaped canals

By Manning S

Date: 04/1990
Journal: JOE


Purpose: To provide further knowledge of the root canal anatomy  of mand 2nd molar to success root canal treatment

N=149 mand 2nd molar


•Teeth were collected and stored in water after extraction then prepared and rendered transparent using the techniques described by Manning. •Afterward, roots were examined with a stereo dissecting microscope

•Data were collected  according to: canal type; apical foramen position; presence and position of transverse anastomoses; presence of a delta of canals at the apex.

•A clinical case related to 30-year-old Vietnamese lady was referred to the Endodontic  treatment

Most highlighted Results: 

1.They found 33 teeth  had one root, and 19 had C-shaped canals

2.In C shaped canals, the most frequent have three canals

3.Lateral canals were found in 19 roots – while transverse anastomoses in 15 with C-chaped

4.Position of apical  foramen was away from the apex in 17 roots, and apical deltas in 16 roots

5.C-shaped canals were found more frequently (P<0.02) in Asians.

6.In clinical case a  C-shaped canal was observed w/a single canal

  Clinical significance:

The presence of a high incidence of transverse anastomoses, lateral canals and apical deltas in  the C canal system  makes treatment difficult.