TY - JOUR
T1 - Remaining dentin thickness in the apical 4 mm following four cleaning and shaping techniques
AU - Weller, Paul J.
AU - Svec, Timothy A.
AU - Powers, John M.
AU - Ludington, John R.
AU - Suchina, John A.
N1 - Funding Information:
The authors would like to thank Dr. Roberta Pileggi and Dr. Arthur H. Jeske for their contributions to editing, Dr. Terry E. Rives for his additional statistical assistance, and Gillian Rittman for her technical assistance with computer imaging. Instruments for this study were donated by Tulsa Dental, Sybron Endo, and Lightspeed Technology and the project was supported by a research fund of the Department of Endodontics and Periodontics, The University of Texas Dental Branch at Houston.
PY - 2005/6
Y1 - 2005/6
N2 - The aim of this study was to determine the remaining dentin thickness (RDT) in the apical 4 mm following four cleaning and shaping techniques. Sixty human adult extracted mandibular incisors and 60 mesial buccal canals of mandibular molars were assigned to five groups of 12 teeth for each tooth type: Step-down stainless steel hand instrumentation, Lightspeed, Profile GT and 0.4 taper, K3 "g pack," control group. After instrumentation the teeth were sectioned at 0.5, 1.5, 2.5, and 3.5 mm short of working length (WL) and evaluated for the minimum RDT at each level. ANOVA of RDT showed significant differences among levels and techniques. For incisors, no technique yielded greater RDT than the other techniques (p < 0.0001). For molars, K3 had greater RDT than the other techniques (p = 0.0006) at the 1.5, 2.5, and 3.5 mm levels. While there were significant statistical differences in RDT among techniques at different levels, further study would be required to determine any significant clinical difference in RDT.
AB - The aim of this study was to determine the remaining dentin thickness (RDT) in the apical 4 mm following four cleaning and shaping techniques. Sixty human adult extracted mandibular incisors and 60 mesial buccal canals of mandibular molars were assigned to five groups of 12 teeth for each tooth type: Step-down stainless steel hand instrumentation, Lightspeed, Profile GT and 0.4 taper, K3 "g pack," control group. After instrumentation the teeth were sectioned at 0.5, 1.5, 2.5, and 3.5 mm short of working length (WL) and evaluated for the minimum RDT at each level. ANOVA of RDT showed significant differences among levels and techniques. For incisors, no technique yielded greater RDT than the other techniques (p < 0.0001). For molars, K3 had greater RDT than the other techniques (p = 0.0006) at the 1.5, 2.5, and 3.5 mm levels. While there were significant statistical differences in RDT among techniques at different levels, further study would be required to determine any significant clinical difference in RDT.
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U2 - 10.1097/01.don.0000148150.40961.9d
DO - 10.1097/01.don.0000148150.40961.9d
M3 - Article
C2 - 15917689
AN - SCOPUS:20444482109
SN - 0099-2399
VL - 31
SP - 464
EP - 467
JO - Journal of endodontics
JF - Journal of endodontics
IS - 6
ER -