Apical Gauging, zinvol of zinloos bij het gebruik van de WaveOne?

Buurma, K.G.D. (2012) Apical Gauging, zinvol of zinloos bij het gebruik van de WaveOne? thesis, Dentistry.

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Abstract

Aim: determination of contact area and the contact length of the Wave One file with the root canal walls after apical gauging. Methodology: 34 root canals of mandibular second molars were selected and were sliced at the cement enamel junction. After standardized coronal preflaring with a ProTaper SX file a K-flexofile was inserted into each root canal until the working length, the apical foramen was reached. According to the K-flexofile that binds at the working length a corresponding WaveOne file was chosen. A K-flexofile 15 corresponds to WaveOne file yellow; K-flexofiles 15 and 20 correspond to WaveOne red; K-flexofiles 30 and 35 correspond to WaveOne black. Complete root canal preparation was carried out with the corresponding WaveOne file. Following preparation the files were fixated in the coronal part of the root canals using light-cured composite. Cross sections were made at two levels 3 and 6 mm from the apical foramen, and these cross sections were digitally photographed. The cross sectional photographs were used to measure the perimeters of the root canal and file, and the non-filled area was calculated. The non-contact area of the file with the root canal walls was evaluated by calculating the perimeter of the root canal and the perimeter of the file contacting the root canal walls. The number of tangent places between the file and root canal walls was recorded. The data were analyzed in SPSS with the one-sample and the two-sample t-test with a critical significance level of 0.05. Results: at the level of 3 and 6 mm from the apical foramen the non-filled area was 20.3% (p < 0.05) and 19.2% (p < 0.05). There was no significant difference between the two levels. The non-contact areas at 3 and 6 mm from the apical foramen were 35.5% (p < 0.05) and 40.7% (p < 0.05). No significance difference was found between the two levels. In both groups (3 mm and 6 mm) the most frequent observation is that at least half of the circumference of the WaveOne file covers the root canal walls (i.e. there are five or more contact points). Conclusion: the apical gauging technique is not a precise method to define the corresponding WaveOne file. At both levels in the root canal there is no full contact with the root canal walls.

Item Type:	Thesis (Thesis)
Supervisor name:	Facultaire begeleider: and Vogels, Drs. M.P.J.M
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 10:59
Last Modified:	25 Jun 2020 10:59
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/1907

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