A Cone-beam Computed Tomographic Study of Root Canal Systems in Mandibular Premolars in a Turkish Population: Theoretical Model for Determining Orifice Shape

Overview

Journal Eur J Dent

Publisher Thieme

Specialty Dentistry

Date 2015 Feb 26

PMID 25713478

Citations 8

Authors

Hakan Arslan

Ismail Davut Capar

Elif Tarim Ertas

Huseyin Ertas

Merve Akcay

Affiliations

Soon will be listed here.

Abstract

Objective: The purposes of this retrospective study were to represent a newly designed theoretical model for determining orifice shape and morphologic properties of mandibular premolars and to correlate these findings with each other.

Materials And Methods: A total of 287 mandibular premolar images obtained from 88 patients by cone-beam computed tomography were included in this study. The measurements were performed below the cementoenamel junction, and different orifice configurations were defined in accordance with various ratios. The age and gender of the patient, the tooth type and position, the number of roots, orifice configuration, root canal configuration, presence of C-shaped canal, and the presence of radicular groove were recorded. It was also recorded whether the root canal becomes round or not and if any, length of the root canal from the orifice to the section in which it becomes round. Furthermore, the theoretical model for determining orifice shape was defined after measurements. The orifice shape was determined as round, oval, flat, keyhole-shaped, and T-shaped, and orifices with short, normal length, and long isthmus. Statistical analyses were performed using Chi-square and Spearman's rank correlation tests (P = 0.05).

Results: Orifice configurations were, usually, flat (37%), or keyhole-shaped (23%). The prevalence of T-shaped was found to be 3.8%. The prevalence of C-shaped canals was found to be 2.1%. The percentage of root canals that became round in the middle or apical thirds was 95.1%. Radicular grooves were detected in 37 (24%) of first premolars and six (4.5%) of second premolars. Statistical analysis revealed that the mean length of distance until the canal reached a round shape varied according to age group (r = -0.270; P < 0.001). There was a statistically significant difference between radicular groove and tooth type (P < 0.001).

Conclusions: The mean length of distance until the canal reached a round shape correlated with the patient's age. The new theoretical model could be beneficial to determine orifice configurations.

Citing Articles

Prevalence of Isthmi and Root Canal Configurations in Mandibular Permanent Teeth Using Cone-Beam Computed Tomography.

Arman S, Nouroloyouni A, Milani A, Sheikhfaal B, Noorolouny S, Saleh Haghgou F Biomed Res Int. 2024; 2024:9969860.

PMID: 39118804 PMC: 11306724. DOI: 10.1155/2024/9969860.

Systematic review and meta-analysis of root morphology and canal configuration of permanent premolars using cone-beam computed tomography.

Xu M, Ren H, Liu C, Zhao X, Li X BMC Oral Health. 2024; 24(1):656.

PMID: 38835024 PMC: 11149329. DOI: 10.1186/s12903-024-04419-y.

Roots and Root Canals Characterization of Permanent Mandibular Premolars Analyzed Using the Cone Beam and Micro Computed Tomography-A Systematic Review and Metanalysis.

Karobari M, Assiry A, Lin G, Almubarak H, Alqahtani S, Tasleem R J Clin Med. 2023; 12(6).

PMID: 36983187 PMC: 10051908. DOI: 10.3390/jcm12062183.

Endodontic Treatment of C-shaped Mandibular Premolars: A Case Report and Review of Literature.

Khorasani M, Nabavi S, Hamedi A, Jafarzadeh H Iran Endod J. 2023; 16(4):244-253.

PMID: 36704776 PMC: 9735311. DOI: 10.22037/iej.v16i4.34187.

Canal configuration and root morphology of mandibular premolars using cone-beam computed tomography in a Korean population.

Choi Y, Lee C, Jeon K, Jang J, Han S Clin Oral Investig. 2021; 26(3):3325-3332.

PMID: 34846559 DOI: 10.1007/s00784-021-04313-9.

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