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Rotary Instrumentation (rotary + instrumentation)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Improved quality of root fillings provided by general dental practitioners educated in nickel,titanium rotary instrumentation

INTERNATIONAL ENDODONTIC JOURNAL, Issue 4 2007
A. Molander
Abstract Aim, To test the hypothesis that an increased utilization of nickel,titanium rotary instrumentation (NTRI) by general dental practitioners will lead to an increased frequency of good quality root fillings. A second aim was to determine whether the educational format would exert influence on the quality. Methodology, Dentists were assigned at random to three intervention groups: a 4-h lecture (L-group, n = 40); a 4-h lecture plus a full day hands-on course (LH-group, n = 40); or a control group receiving no instruction (n = 68). The control group received education later on in the study. Radiographs of two root filled molar teeth per dentist were selected at random before the start of the education program and after a 6-month clinical learning period. Using length, seal and shape of root-fillings a 5-level variable was created. Results, The rate of good quality root fillings increased after the introduction of NTRI. Calculated over all types of roots the frequency of excellent (score 1) root fillings increased from 31% to 51% (P = 0.006) in the L-group and from 27% to 47% (P = 0.016) in the LH-group. The frequency of low quality root-fillings (score 5) dropped in the L-group from 22% to 16% (P = 0.29) and in the LH-group from 13% to 9% (P = 0.48). No statistically significant difference was seen among the controls. Conclusions, When NTRI technology replaced manual stainless steel techniques the rate of good quality root fillings increased. A significant drop in the rate of low quality root fillings was not found. [source]

An in vitro comparison of pH changes in root dentine following canal dressing with calcium hydroxide points and a conventional calcium hydroxide paste

INTERNATIONAL ENDODONTIC JOURNAL, Issue 3 2002
S. M. Ardeshna
Abstract Aim This study aimed to measure and compare pH changes at apical and cervical sites on the external root surface of extracted teeth dressed with calcium hydroxide in two different formulations. Methodology Root canals of 45 single-rooted extracted human teeth were accessed and shaped using a step-down technique with rotary instrumentation. Standard cavities were prepared on the external root surface at specific apical and cervical sites. The teeth were randomly allocated to three groups. Teeth in group A were dressed with calcium hydroxide points, those in group B were dressed with an aqueous calcium hydroxide paste and teeth in group C were left unfilled. Following storage in humid conditions, the pH of the dentine at apical and cervical sites was measured at baseline and then at 24 h, 72 h, 1 week, 10 days, 2 weeks and 3 weeks. Results The pH of the root dentine at both apical and cervical sites was significantly greater (P < 0.001) in teeth dressed with aqueous calcium hydroxide paste compared with those dressed with calcium hydroxide points, when averaged out across all time periods. For all groups, there was a significant difference between the mean apical and cervical pH values for each tooth with lower values for the apical sites (P < 0.001). Conclusion The results of this study indicate that an aqueous calcium hydroxide paste was more effective than calcium hydroxide points at raising the pH on the external root surface of extracted teeth. [source]

Endodontic management of a fused mandibular third molar and distomolar: A case report

AUSTRALIAN ENDODONTIC JOURNAL, Issue 1 2010
Ali Zeylabi dds
Abstract Careful management of fused teeth is essential as abnormal morphology can predispose a tooth to caries and periodontal disease. In this paper, a rare case of successful endodontic management of unilateral mandibular third molar fused to a distomolar is reported. Caries was removed from the tooth complex under local anaesthesia. The pulp chambers of the third molar and supernumerary tooth were accessed and the root canals were prepared using rotary instrumentation and copious irrigation with 2.5% sodium hypochlorite. Obturation using the lateral condensation technique with gutta-percha and AH26 sealer was subsequently performed. A 1-year recall showed a good treatment result. [source]