Abstract
Introduction: Dentinal damage and cracks induced by orthograde preparation methods have been reported in studies using extracted teeth. The purpose of this. in situ investigation was to evaluate dentinal cracks in nonextracted teeth after final instrumentation. The null hypothesis is that orthograde root canal instrumentation will have no effect on crack initiation in teeth retained in the natural periodontium. Methods: Mandibular first and second premolars of pig jaws were selected. Forty single-rooted canals were divided into 5 groups (n = 8):. (1) WaveOne (Dentsply Tulsa Dental Specialties, Tulsa, OK) 25/08;. (2) ProTaper rotary S1, S2, F2 (25/08) (Dentsply Tulsa Dental Specialties);. (3) crown-down GT hand files 20/12, 20/10, 20/08 (Dentsply Tulsa Dental Specialties);. (4) positive control (purposefully cracked); and. (5) negative control (uninstrumented teeth). After instrumentation, superficial soft tissue was removed, and bone was carefully peeled away with surgical burs to the level of the root apices. Roots were resected 1 mm coronal to the working length, stained with caries indicator dye, and transilluminated; images were captured and viewed at 30× magnification to determine the presence or absence of dentinal cracks. Results: WaveOne, ProTaper rotary, and GT hand files produced no cracks. All positive controls had cracks; all negative controls had no cracks. Conclusions: Within the limits of this investigation, the presence of natural periodontal structures may prevent cracking or dentinal damage in teeth receiving orthograde root canal instrumentation.
| Original language | English (US) |
|---|---|
| Journal | Journal of Endodontics |
| DOIs | |
| State | Accepted/In press - 2015 |
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Keywords
- Crack
- Instrumentation
- Root canal
ASJC Scopus subject areas
- Dentistry(all)
Cite this
An Evaluation of Apical Cracks in Teeth Undergoing Orthograde Root Canal Instrumentation. / Rose, Elizabeth; Svec, Timothy.
In: Journal of Endodontics, 2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - An Evaluation of Apical Cracks in Teeth Undergoing Orthograde Root Canal Instrumentation
AU - Rose, Elizabeth
AU - Svec, Timothy
PY - 2015
Y1 - 2015
N2 - Introduction: Dentinal damage and cracks induced by orthograde preparation methods have been reported in studies using extracted teeth. The purpose of this. in situ investigation was to evaluate dentinal cracks in nonextracted teeth after final instrumentation. The null hypothesis is that orthograde root canal instrumentation will have no effect on crack initiation in teeth retained in the natural periodontium. Methods: Mandibular first and second premolars of pig jaws were selected. Forty single-rooted canals were divided into 5 groups (n = 8):. (1) WaveOne (Dentsply Tulsa Dental Specialties, Tulsa, OK) 25/08;. (2) ProTaper rotary S1, S2, F2 (25/08) (Dentsply Tulsa Dental Specialties);. (3) crown-down GT hand files 20/12, 20/10, 20/08 (Dentsply Tulsa Dental Specialties);. (4) positive control (purposefully cracked); and. (5) negative control (uninstrumented teeth). After instrumentation, superficial soft tissue was removed, and bone was carefully peeled away with surgical burs to the level of the root apices. Roots were resected 1 mm coronal to the working length, stained with caries indicator dye, and transilluminated; images were captured and viewed at 30× magnification to determine the presence or absence of dentinal cracks. Results: WaveOne, ProTaper rotary, and GT hand files produced no cracks. All positive controls had cracks; all negative controls had no cracks. Conclusions: Within the limits of this investigation, the presence of natural periodontal structures may prevent cracking or dentinal damage in teeth receiving orthograde root canal instrumentation.
AB - Introduction: Dentinal damage and cracks induced by orthograde preparation methods have been reported in studies using extracted teeth. The purpose of this. in situ investigation was to evaluate dentinal cracks in nonextracted teeth after final instrumentation. The null hypothesis is that orthograde root canal instrumentation will have no effect on crack initiation in teeth retained in the natural periodontium. Methods: Mandibular first and second premolars of pig jaws were selected. Forty single-rooted canals were divided into 5 groups (n = 8):. (1) WaveOne (Dentsply Tulsa Dental Specialties, Tulsa, OK) 25/08;. (2) ProTaper rotary S1, S2, F2 (25/08) (Dentsply Tulsa Dental Specialties);. (3) crown-down GT hand files 20/12, 20/10, 20/08 (Dentsply Tulsa Dental Specialties);. (4) positive control (purposefully cracked); and. (5) negative control (uninstrumented teeth). After instrumentation, superficial soft tissue was removed, and bone was carefully peeled away with surgical burs to the level of the root apices. Roots were resected 1 mm coronal to the working length, stained with caries indicator dye, and transilluminated; images were captured and viewed at 30× magnification to determine the presence or absence of dentinal cracks. Results: WaveOne, ProTaper rotary, and GT hand files produced no cracks. All positive controls had cracks; all negative controls had no cracks. Conclusions: Within the limits of this investigation, the presence of natural periodontal structures may prevent cracking or dentinal damage in teeth receiving orthograde root canal instrumentation.
KW - Crack
KW - Instrumentation
KW - Root canal
UR - http://www.scopus.com/inward/record.url?scp=84951753357&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84951753357&partnerID=8YFLogxK
U2 - 10.1016/j.joen.2015.08.023
DO - 10.1016/j.joen.2015.08.023
M3 - Article
JO - Journal of Endodontics
JF - Journal of Endodontics
SN - 0099-2399
ER -