Restorative Dentistry & Endodontics

A survey of experience-based preference of Nickel-Titanium rotary files and incidence of fracture among general dentists: WooCheol Lee, Minju Song, Euiseong Kim, Hyojin Lee, Hyeon-Cheol Kim; Restor Dent Endod 2012;37(4):201-206. Published online November 21, 2012; DOI: https://doi.org/10.5395/rde.2012.37.4.201

Abstract PDF PubReader ePub: Objectives
The purpose was to investigate the preference and usage technique of NiTi rotary instruments and to retrieve data on the frequency of re-use and the estimated incidence of file separation in the clinical practice among general dentists.
Materials and Methods
A survey was disseminated via e-mail and on-site to 673 general dentists. The correlation between the operator's experience or preferred technique and frequency of re-use or incidence of file fracture was assessed.
Results
A total of 348 dentists (51.7%) responded. The most frequently used NiTi instruments was ProFile (39.8%) followed by ProTaper. The most preferred preparation technique was crown-down (44.6%). 54.3% of the respondents re-used NiTi files more than 10 times. There was a significant correlation between experience with NiTi files and the number of reuses (p = 0.0025). 54.6% of the respondents estimated experiencing file separation less than 5 times per year. The frequency of separation was significantly correlated with the instrumentation technique (p = 0.0003).
Conclusions
A large number of general dentists in Korea prefer to re-use NiTi rotary files. As their experience with NiTi files increased, the number of re-uses increased, while the frequency of breakage decreased. Operators who adopt the hybrid technique showed less tendency of separation even with the increased number of re-use.

24 View
0 Download

The relationship of radiographic lesion size and characteristics to diagnosis of periapical cysts and granulomas: Ho-Sik Choi, Woo-Cheol Lee, Won-Jun Shon, Kee-Yeon Kum, Kwang-Shik Bae, Seung-Ho Baek; J Korean Acad Conserv Dent 2010;35(1):24-29. Published online January 31, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.1.024

The purpose of this study was to find out the relationship of radiographic lesion size, gender, age of patients and radiographic character to the diagnosis of periapical cyst and granuloma.

The data was collected from 187 periapical lesions of 167 patients who undergone apical surgery at Department of Conservative Dentistry, Seoul National University Dental Hospital from 2003 to 2005. The lesion were surgically removed and send for biopsy to the Oral Pathology Laboratory. From the initial radiograph, lesion size was calculated using PiViewSTAR® (INFINITT, Korea) program. The obtained data were statistically evaluated using SPSS (p < 0.05).

The result were as followings:

From 187 biopsy samples, the incidence of periapical cyst was 28.34% and granuloma was 65.24%.

There was a significant correlation between periapical cyst and the size of radiographic lesion (p < 0.01).

There were no significant correlations between age, gender, location of lesion and the final diagnosis (p > 0.05).

There was a significant correlation between the non-demarcation of the lesion and the incidence of periapical granuloma (p < 0.01).

17 View
0 Download

Endodontic flare-ups incidence and related factors: Hye-Young Jung, Sang-Hyuk Park, Gi-Woon Choi; J Korean Acad Conserv Dent 2005;30(2):102-111. Published online March 31, 2005; DOI: https://doi.org/10.5395/JKACD.2005.30.2.102

Abstract PDF PubReader ePub

The purpose of this study was to assess the incidence of flare-ups among patients who received endodontic treatment and to examine the correlation with pre-operative and operative variables.

Analysis was in two aspects (a) overall incidence of flare-ups as expressed by a percentage of all patients visits and (b) percentage of flare-ups that occurred as related to various factors such as patient demographics, diagnosis, and treatment procedures.

1. From the 840 teeth which were examined in this study, the total number of flare-ups was 13.

2. As to gender of patients, there was no significant difference in flare-ups.

3. As to tooth groups, there was no significant difference in flare-ups.

4. In the teeth with pre-operative symptom, there was a statistically significant higher incidence of flare-ups than the teeth without it.

5. In the teeth with apical periodontitis, there was a statistically significant higher incidence of flare-ups.

6. As to pulp and periapical status, non-vital teeth had a higher incidence as compared with vital teeth, irreversible pulpitis.

7. Multi-visit treatment resulted in the higher incidence of flare-ups than one visit treatment.

8. Re-treatment procedures had a statistically significant higher incidence of flare-ups than root canal treatment.

In this study, overall percentages of flare-ups was 1.55%. It showed a statistically significant higher incidence related to pre-operative symptom, apical periodontitis, and re-treatment. There was no significant difference in flare-ups related to gender, tooth groups, and fistula.

19 View
0 Download

Search