Apical foramen morphology according to the length of merged canal at the apex
Objectives The aim of this study was to investigate the relationship between the apical foramen morphology and the length of merged canal at the apex in type II root canal system. Materials and Methods This study included intact extracted maxillary and mandibular human premolars (n = 20) with f...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Korean Academy of Conservative Dentistry
2013-02-01
|
| Series: | Restorative Dentistry & Endodontics |
| Online Access: | https://doi.org/10.5395/rde.2013.38.1.26 |
| _version_ | 1819237004328566784 |
|---|---|
| author | Hee-Ho Kim Jeong-Bum Min Ho-Keel Hwang |
| author_facet | Hee-Ho Kim Jeong-Bum Min Ho-Keel Hwang |
| author_sort | Hee-Ho Kim |
| collection | DOAJ |
| description | Objectives
The aim of this study was to investigate the relationship between the apical foramen morphology and the length of merged canal at the apex in type II root canal system.
Materials and Methods
This study included intact extracted maxillary and mandibular human premolars (n = 20) with fully formed roots without any visible signs of external resorption. The root segments were obtained by removing the crown 1 mm beneath the cementum-enamel junction (CEJ) using a rotary diamond disk. The distance between the file tip and merged point of joining two canals was defined as Lj. The roots were carefully sectioned at 1 mm from the apex by a slow-speed water-cooled diamond saw. All cross sections were examined under the microscope at ×50 magnification and photographed to estimate the shape of the apical foramen. The longest and the shortest diameter of apical foramen was measured using ImageJ program (1.44p, National Institutes of Health). Correlation coefficient was calculated to identify the link between Lj and the apical foramen shape by Pearson's correlation.
Results
The average value of Lj was 3.74 mm. The average of proportion (P), estimated by dividing the longest diameter into the shortest diameter of the apical foramen, was 3.64. This study showed a significant negative correlation between P and Lj (p < 0.05).
Conclusions
As Lj gets longer, the apical foramen becomes more ovally shaped. Likewise, as it gets shorter, the apical foramen becomes more flat shaped. |
| first_indexed | 2024-12-23T13:13:26Z |
| format | Article |
| id | doaj.art-f128e237db5340b8bba98cb14acad9ad |
| institution | Directory Open Access Journal |
| issn | 2234-7658 2234-7666 |
| language | English |
| last_indexed | 2024-12-23T13:13:26Z |
| publishDate | 2013-02-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj.art-f128e237db5340b8bba98cb14acad9ad2022-12-21T17:45:41ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662013-02-01381263010.5395/rde.2013.38.1.26Apical foramen morphology according to the length of merged canal at the apexHee-Ho Kim0Jeong-Bum Min1Ho-Keel Hwang2Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.Objectives The aim of this study was to investigate the relationship between the apical foramen morphology and the length of merged canal at the apex in type II root canal system. Materials and Methods This study included intact extracted maxillary and mandibular human premolars (n = 20) with fully formed roots without any visible signs of external resorption. The root segments were obtained by removing the crown 1 mm beneath the cementum-enamel junction (CEJ) using a rotary diamond disk. The distance between the file tip and merged point of joining two canals was defined as Lj. The roots were carefully sectioned at 1 mm from the apex by a slow-speed water-cooled diamond saw. All cross sections were examined under the microscope at ×50 magnification and photographed to estimate the shape of the apical foramen. The longest and the shortest diameter of apical foramen was measured using ImageJ program (1.44p, National Institutes of Health). Correlation coefficient was calculated to identify the link between Lj and the apical foramen shape by Pearson's correlation. Results The average value of Lj was 3.74 mm. The average of proportion (P), estimated by dividing the longest diameter into the shortest diameter of the apical foramen, was 3.64. This study showed a significant negative correlation between P and Lj (p < 0.05). Conclusions As Lj gets longer, the apical foramen becomes more ovally shaped. Likewise, as it gets shorter, the apical foramen becomes more flat shaped.https://doi.org/10.5395/rde.2013.38.1.26 |
| spellingShingle | Hee-Ho Kim Jeong-Bum Min Ho-Keel Hwang Apical foramen morphology according to the length of merged canal at the apex Restorative Dentistry & Endodontics |
| title | Apical foramen morphology according to the length of merged canal at the apex |
| title_full | Apical foramen morphology according to the length of merged canal at the apex |
| title_fullStr | Apical foramen morphology according to the length of merged canal at the apex |
| title_full_unstemmed | Apical foramen morphology according to the length of merged canal at the apex |
| title_short | Apical foramen morphology according to the length of merged canal at the apex |
| title_sort | apical foramen morphology according to the length of merged canal at the apex |
| url | https://doi.org/10.5395/rde.2013.38.1.26 |
| work_keys_str_mv | AT heehokim apicalforamenmorphologyaccordingtothelengthofmergedcanalattheapex AT jeongbummin apicalforamenmorphologyaccordingtothelengthofmergedcanalattheapex AT hokeelhwang apicalforamenmorphologyaccordingtothelengthofmergedcanalattheapex |