Comparison of the Removability of Different Niti Rotary File Systems from Root Canals

Bengi Gülgü; Leyla Benan Ayrancı; Didem Odabaşı

Article Details

Comparison of the Removability of Different Niti Rotary File Systems from Root Canals

Authors:

Bengi Gülgü | Leyla Benan Ayrancı | Didem Odabaşı

Publisher:

Ordu University

Main Topics:

Endodontics

Journal:

Middle Black Sea Journal of Health Science Vol.11 Issue 2, pp.83-96

Document Type:

Article

Publication Date:

5/2025

Document Language:

English

Document ID (Org No.):

2001349537

pISSN:

2149-7796

Keywords:

Abstract:

 Objective: This study aimed to compare the removability of fractured nickel-titanium rotary instruments with different working principles in the middle and coronal thirds of the canal using ultrasonic tips and the BTR pen. Method: Thirty-two mandibular molars were selected from recently extracted teeth that met the inclusion criteria. Teeth had to have a closed apex, no root caries, anomalies, fractures, cracks, or signs of internal or external resorption. The mesiobuccal roots were intentionally fractured, and the root inclination was confirmed to be 20 using Schneiders method. Teeth with a higher inclination angle were excluded. Access cavities were opened traditionally to allow direct canal access, and apical patency was verified with 10 K files. Canal lengths were measured, and teeth were embedded in acrylic blocks for easier handling. The teeth were divided into four study groups n8 based on the working principle of the instrument and the location of the fractured instrument coronal or middle third. NiTi instruments with the same taper 0.6 and heat treatment blue were selected. A 4 mm mark was made on each file, and files were thinned to half their thickness at the designated breaking point using a diamond bur. A stage platform was created with Gates Glidden burs to improve the visibility of the broken instruments. After creating the platform, dentin around the broken files was removed by 2 mm with ultrasonic tips, and the broken pieces were extracted using a BTR Pen with a 0.3 mm thin wire loop. Results: When analyzed by working principle, the removal time for fractured instruments in the middle third was significantly higher p0.0001. Within the coronal third, the removal time for reciprocal files was significantly longer p0.021. Similarly, in the middle third, the removal time for reciprocal files was statistically longer p0.004. Conclusion: The BTR Pen was effective for both rotary file systems. The location of the fractured instrument influenced the removal time, with faster results in the coronal third due to better access and visibility. Additionally, the type of fractured NiTi rotary instrument also impacted the time required for successful removal, with rotary instruments in the middle third taking significantly longer.

 Objective: This study aimed to compare the removability of fractured nickel-titanium rotary instruments with different working principles in the middle and coronal thirds of the canal using ultrasonic tips and the BTR pen. Method: Thirty-two mandibular molars were selected from recently extracted teeth that met the inclusion criteria. Teeth had to have a closed apex, no root caries, anomalies, fractures, cracks, or signs of internal or external resorption. The mesiobuccal roots were intentionally fractured, and the root inclination was confirmed to be 20 using Schneiders method. Teeth with a higher inclination angle were excluded. Access cavities were opened traditionally to allow direct canal access, and apical patency was verified with 10 K files. Canal lengths were measured, and teeth were embedded in acrylic blocks for easier handling. The teeth were divided into four study groups n8 based on the working principle of the instrument and the location of the fractured instrument coronal or middle third. NiTi instruments with the same taper 0.6 and heat treatment blue were selected. A 4 mm mark was made on each file, and files were thinned to half their thickness at the designated breaking point using a diamond bur. A stage platform was created with Gates Glidden burs to improve the visibility of the broken instruments. After creating the platform, dentin around the broken files was removed by 2 mm with ultrasonic tips, and the broken pieces were extracted using a BTR Pen with a 0.3 mm thin wire loop. Results: When analyzed by working principle, the removal time for fractured instruments in the middle third was significantly higher p0.0001. Within the coronal third, the removal time for reciprocal files was significantly longer p0.021. Similarly, in the middle third, the removal time for reciprocal files was statistically longer p0.004. Conclusion: The BTR Pen was effective for both rotary file systems. The location of the fractured instrument influenced the removal time, with faster results in the coronal third due to better access and visibility. Additionally, the type of fractured NiTi rotary instrument also impacted the time required for successful removal, with rotary instruments in the middle third taking significantly longer.

 Objective: This study aimed to compare the removability of fractured nickel-titanium rotary instruments with different working principles in the middle and coronal thirds of the canal using ultrasonic tips and the BTR pen. Method: Thirty-two mandibular molars were selected from recently extracted teeth that met the inclusion criteria. Teeth had to have a closed apex, no root caries, anomalies, fractures, cracks, or signs of internal or external resorption. The mesiobuccal roots were intentionally fractured, and the root inclination was confirmed to be 20 using Schneiders method. Teeth with a higher inclination angle were excluded. Access cavities were opened traditionally to allow direct canal access, and apical patency was verified with 10 K files. Canal lengths were measured, and teeth were embedded in acrylic blocks for easier handling. The teeth were divided into four study groups n8 based on the working principle of the instrument and the location of the fractured instrument coronal or middle third. NiTi instruments with the same taper 0.6 and heat treatment blue were selected. A 4 mm mark was made on each file, and files were thinned to half their thickness at the designated breaking point using a diamond bur. A stage platform was created with Gates Glidden burs to improve the visibility of the broken instruments. After creating the platform, dentin around the broken files was removed by 2 mm with ultrasonic tips, and the broken pieces were extracted using a BTR Pen with a 0.3 mm thin wire loop. Results: When analyzed by working principle, the removal time for fractured instruments in the middle third was significantly higher p0.0001. Within the coronal third, the removal time for reciprocal files was significantly longer p0.021. Similarly, in the middle third, the removal time for reciprocal files was statistically longer p0.004. Conclusion: The BTR Pen was effective for both rotary file systems. The location of the fractured instrument influenced the removal time, with faster results in the coronal third due to better access and visibility. Additionally, the type of fractured NiTi rotary instrument also impacted the time required for successful removal, with rotary instruments in the middle third taking significantly longer.

 Objective: This study aimed to compare the removability of fractured nickel-titanium rotary instruments with different working principles in the middle and coronal thirds of the canal using ultrasonic tips and the BTR pen. Method: Thirty-two mandibular molars were selected from recently extracted teeth that met the inclusion criteria. Teeth had to have a closed apex, no root caries, anomalies, fractures, cracks, or signs of internal or external resorption. The mesiobuccal roots were intentionally fractured, and the root inclination was confirmed to be 20 using Schneiders method. Teeth with a higher inclination angle were excluded. Access cavities were opened traditionally to allow direct canal access, and apical patency was verified with 10 K files. Canal lengths were measured, and teeth were embedded in acrylic blocks for easier handling. The teeth were divided into four study groups n8 based on the working principle of the instrument and the location of the fractured instrument coronal or middle third. NiTi instruments with the same taper 0.6 and heat treatment blue were selected. A 4 mm mark was made on each file, and files were thinned to half their thickness at the designated breaking point using a diamond bur. A stage platform was created with Gates Glidden burs to improve the visibility of the broken instruments. After creating the platform, dentin around the broken files was removed by 2 mm with ultrasonic tips, and the broken pieces were extracted using a BTR Pen with a 0.3 mm thin wire loop. Results: When analyzed by working principle, the removal time for fractured instruments in the middle third was significantly higher p0.0001. Within the coronal third, the removal time for reciprocal files was significantly longer p0.021. Similarly, in the middle third, the removal time for reciprocal files was statistically longer p0.004. Conclusion: The BTR Pen was effective for both rotary file systems. The location of the fractured instrument influenced the removal time, with faster results in the coronal third due to better access and visibility. Additionally, the type of fractured NiTi rotary instrument also impacted the time required for successful removal, with rotary instruments in the middle third taking significantly longer.

Article Details

Comparison of the Removability of Different Niti Rotary File Systems from Root Canals

Authors:

Bengi Gülgü | Leyla Benan Ayrancı | Didem Odabaşı

Publisher:

Ordu University

Main Topics:

Endodontics

Journal:

Middle Black Sea Journal of Health Science Vol.11 Issue 2, pp.83-96

Document Type:

Article

Publication Date:

5/2025

Document Language:

English

Document ID (Org No.):

2001349537

pISSN:

2149-7796

Broken file

Broken file removal

NiTi rotary instruments

ultrasonic

BTR Pen

Issues

Article Details

Comparison of the Removability of Different Niti Rotary File Systems from Root Canals

Authors: Bengi Gülgü | Leyla Benan Ayrancı | Didem Odabaşı

Publisher: Ordu University

Main Topics: Endodontics

Journal: Middle Black Sea Journal of Health Science Vol.11 Issue 2, pp.83-96

Document Type: Article

Publication Date: 5/2025

Document Language: English

Document ID (Org No.): 2001349537

pISSN: 2149-7796

Broken file

Broken file removal

NiTi rotary instruments

ultrasonic

BTR Pen

Issues

Authors:

Bengi Gülgü | Leyla Benan Ayrancı | Didem Odabaşı

Publisher:

Ordu University

Main Topics:

Endodontics

Journal:

Middle Black Sea Journal of Health Science Vol.11 Issue 2, pp.83-96

Document Type:

Article

Publication Date:

5/2025

Document Language:

English

Document ID (Org No.):

2001349537

pISSN:

2149-7796