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Dentine removal in the coronal portion of root canals following two preparation techniques
Author(s) -
Plotino G.,
Grande N. M.,
Falanga A.,
Di Giuseppe I. L.,
Lamorgese V.,
Somma F.
Publication year - 2007
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2007.01284.x
Subject(s) - coronal plane , molar , dentistry , root canal , crown (dentistry) , materials science , significant difference , orthodontics , mathematics , medicine , anatomy , statistics
Aim To measure the root canal area and the reduction of the mesial and buccal/lingual wall thickness at the level of the coronal interference in mesial roots of mandibular molars after instrumentation with a crown‐down or a simultaneous root canal preparation technique. Methodology Twenty mesial roots of first mandibular molars with a moderate root canal curvature were embedded in resin and sectioned horizontally at the level of the coronal interference, using a modification of the Bramante technique. After scanning and processing, the sections were reassembled. One root canal of each root was prepared using ProTaper instruments, while M two instruments were used in the other root canal of the same mesial root. After scanning and processing, the data obtained were analysed for two parameters: changes in root canal area after instrumentation (ΔA) and reduction of the mesial and buccal/lingual wall thickness (ΔT). The data were subjected to Student's t ‐tests for statistical analysis at a significance level of P < 0.05. Results No statistically significant differences were found between the two groups with respect to the changes in the areas (ΔA) at the level considered ( P = 0.410). No statistically significant differences were noticed between the two groups for dentine thickness (ΔT) of both the mesial wall ( P = 0.077) and the buccal or lingual wall ( P = 0.171). Conclusions There was no difference between the ProTaper and M two groups for the amount of dentine removed.