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한국인의 영구 하악 제2대구치의 C형 근관 빈도와 형태
문정본(Jung-Bon Moon),장주경(Ju-Kyong Jang),김현철(Hyeon-Cheol Kim),이효진(Hyojin Lee),박봉수(Bong-Soo Park),손성애(Sung-Ae Son) 대한치과의사협회 2012 대한치과의사협회지 Vol.50 No.4
Objective : The aim of this study was to investigate the incidence of the C-shaped canal of permanent mandibular second molar (PMSM) in Korean sub-population using Cone-Beam CT (CBCT) data and analyze the types of C-shaped canal. Materials & Methods : The protocol for this study was approved by the Institutional Review Board at the Pusan National University Hospital (E-2011039). Among the CBCT images taken of patients who visited the St. Bennedict Dental Hospital (Busan, Korea) from May 2008 to April 2011 for implant surgery and surgical removal of impacted teeth, high-quality CBCTs from 705 patients (361 male and 342 female) were screened and 607 PMSMs of 383 patients were evaluated retrospectively. All PMSMs were anatomically analyzed in detail by using image viewer software (EasyDent; Vatech). PMSMs were evaluated in the axial plane to investigate the shape of root and canals. The C-shaped canals were classified into five types. The total incidence, gender ratio, bilateral and unilateral appearance, and the correlation between right-side and left-side occurrences of C-shaped PMSMs were computed and compared statistically using the chi-square test. Results : Among the 607 PMSMs of 383 CBCTs of 187 females and 196 males, 198 PMSMs (32.6%) had C-shaped root and 158 PMSMs (26.0%) had C-shaped canals. The shape of C-shaped root canals at the furcation level did not have significant change at the level of mid root (P<0.0001). Female had more prevalence of C-shaped root canals than male (P<0.0001). The prevalence of bilateral occurrence of C-shaped root canals was higher than unilateral occurrence. Conclusions : The occurrence of C-shaped PMSMs among a Korean population was 32.6% and was higher than other countries and ethnicities. Understanding the prevalence of PMSMs with a C-shaped root and/or canal in a Korean population may be useful for successful endodontic treatments.
소병학 ( Byung Hak So ),이미진 ( Mi Jin Lee ),김현 ( Hyun Kim ),문정미 ( Jeong Mi Moon ),박경혜 ( Kyung Hye Park ),성애진 ( Ae Jin Sung ),염석란 ( Seok Ran Yeom ),오성범 ( Seong Beom Oh ),유지영 ( Ji Young You ),이경우 ( Kyung Wo 대한임상독성학회 2010 대한임상독성학회지 Vol.8 No.2
Purpose: The aim of this study was to investigate toxic exposures in emergency centers with using a toxic exposure surveillance system-based report form as a preliminary study. Methods: We retrospectively reviewed the medical records of toxic exposure patients who visited emergency centers from January to December 2008. Results: 3,157 patients from 11 emergency centers were enrolled. Males were involved in 47.9% of the total cases of exposure and in 60.1% of the cases of fatal exposure. Suicidal intent was the most common (61.0%) reason and most (87.4%) fatal exposures were suicidal. Pesticides were involved in 30.7% of the cases and sedative/hypnotics/ antipsychotics were involved in 20.5%. The substances most frequently involved in fatalities were pesticides, and a 48.4% fatality rate was recorded for paraquat exposure. Conclusion: The toxic exposure data showed the preliminary poisoning events in emergency centers. It is recommended that toxicology professionals should develop a toxic surveillance system and serial reporting should be performed.