Clinical investigation of in vivo endodontically treated mandibular and maxillary molars

By Hartwell G and Bellizzi R

Date: 10/1982
Journal: JOE

Summary: 

•Purpose:

to investigate obturated root canals in maxillary and mandibular molars that had been treated clinically and compare them to previous in vitro and in vivo findings.

•N= total of 1,976 clinically treated molars.

•Materials/Methods:

  • 1,262 mandibular and 714 maxillary molars were reviewed from clinical records.
  • The final radiographs were evaluated and findings were recorded.

Most highlighted Results: 

Table 1

1.Mandibular 1st molars having 4 canals comprised 35.1%.

2.Mandibular 2nd molars with 4 canals consisted of 5.5%

3.Maxillary 1st molars having 4 canals comprised 18%.

4.Maxillary 2nd molars with 4 canals consisted of 9.6%

Clinical significance: 

The 4th canal in mandibular molars was more easily located and treated than in the maxillary molars. A modified access form can help localizing these canals.