Document Type




Format of Original

7 p.

Publication Date



Uniwersytet Marii Curie-Sklodowskiej, Lublin

Source Publication

Annales Universitatis Mariae Curie-Sklodowska

Source ISSN



Precise preparation of the root canal ostium with a view to hermetical closing with retrograde root filling is an important prognostic factor determining the success of the procedure of tooth resection. Root canals interconnected with a narrow isthmus may cause problems both in endodontic treatment and in retrograde filling. The aim of this work is the research of the transverse cross-section of root canals of first and second lower molars on the resection model. The research encompasses 100 randomly selected molar teeth: 50 first and 50 second lower molars. The tooth root apexes were cut 3 mm below the apex and examined under an electron microscope, special attention being paid to the shape of root canal cross-sections. In the group of first molar teeth, in 20% the presence of an isthmus between canals in the proximal roots was observed; in the group of second molar teeth an isthmus between the canals of proximal roots occurred in 18% of the cases. It seems that the relatively high percentage (20%-18%) of the occurrence of an isthmus, 3 mm below the root apex, between two elongated transverse cross-section proximal root canals of first and second molars should encourage particular caution in the retrograde filling of the above-mentioned canals during the procedure of resection.


Published version. Annales Universitatis Mariae Curie - Sklodowska, Vol. 59, No. 1 (2004): 54-60. Permalink. © 2004 Uniwersytet Marii Curie-Sklodowskiej, Lublin.

Angieszka Domagala was affiliated with the Maria Curie-Sklodowska University Lublin at the time of publication. The author of this document, Agnieszka Domagala, published under the name, Komorek, at the time of publication.

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