단근 소구치의 근관계 형태에 따른 치근단부 확대기구의 크기
The Apical File Size according to the Root Canal System of Premolars with Single Root
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Purpose: to investigate the discrepancies between the apical root canal diameter and initial apical file according to the shape of apical foramen. Materials and Methods: Sixty extracted premolars were assigned to three groups according to the root canal system (type 1, 2, 3) of 20 teeth each. After chamber opening, the initial apical file (IAF) was inserted into root canal until the file tip was just visible through apical foramen under the microscope and fixed with methaacrylate in the root canal. The root tip was cut horizontally 1 mm from the anatomical apex and the apical cross-section was visualized using microscope (BX60MF, OLYMPUS OPTICAL Co., LTD. Japan) at ⨯50 magnification. Result:1. Mean diameter of IAF was 0.36 mm in type 1, 0.34 mm in type 2, and 0.29 mm in type 3. There were no significant differences among groups. 2. The ratio between the area of apical root canal and IAF was 40.05% in type 1, 27.05% in type 2, and 34.63% in type 3. There was a significant difference between group 1 and 2 (p<0.05). Conclusion: The IAF of premolar was more than size 30 regardless the root canal system, and it was much smaller than real apical canal size in view of the ratio between the area of apical root canal and IAF.
Abstract
Purpose: to investigate the discrepancies between the apical root canal diameter and initial apical file according to the shape of apical foramen. Materials and Methods: Sixty extracted premolars were assigned to three groups according to the root canal system (type 1, 2, 3) of 20 teeth each. After chamber opening, the initial apical file (IAF) was inserted into root canal until the file tip was just visible through apical foramen under the microscope and fixed with methaacrylate in the root canal. The root tip was cut horizontally 1 mm from the anatomical apex and the apical cross-section was visualized using microscope (BX60MF, OLYMPUS OPTICAL Co., LTD. Japan) at ⨯50 magnification. Result:1. Mean diameter of IAF was 0.36 mm in type 1, 0.34 mm in type 2, and 0.29 mm in type 3. There were no significant differences among groups. 2. The ratio between the area of apical root canal and IAF was 40.05% in type 1, 27.05% in type 2, and 34.63% in type 3. There was a significant difference between group 1 and 2 (p<0.05). Conclusion: The IAF of premolar was more than size 30 regardless the root canal system, and it was much smaller than real apical canal size in view of the ratio between the area of apical root canal and IAF.
참고문헌 (27)
- Card SJ, "The effectiveness of increased apical enlargement in reducing intracanal bacteria", J Endod, 28, pp.779~783 (2002)
- Chai WL, "Cross-sectional morphology and minimum canal wall widths in C-shaped roots of mandibular molars", J Endod, 30, pp.509~512 (2004)
- Contreras MA, "Comparison of the first file that fits at the apex, before and after early flaring", J Endod, 27, pp.113~116 (2001)
- Hecker H, "Determining the apical preparation size in premolars: part III", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 110, pp.118~124 (2010)
- 황호길, "Coronal flaring 전, 후 초기근관장 파일크기의 분석", Restorative Dentistry and Endodontics, 28(1), pp.64~71 (2003), 대한치과보존학회
- Ingle JI, "Endodontics" (1985), Lea & Febiger
- 정은주, "제2형 근관의 확대에 따른 최종근관장파일 크기의 비교", Restorative Dentistry and Endodontics, 33(5), pp.435~442 (2008), 대한치과보존학회
- Lambrianidis T, "Evaluation of periapical radiographs in the recognition of C-shaped mandibular second molars", Int Endod J, 34, pp.458~462 (2001)
- Lyroudia K, "3D reconstruction of two C-shape mandibular molars", J Endod, 23, pp.101~104 (1997)
- Manning SA:Root canal anatomy of mandibular second molars.Part II, "Root canal anatomy of mandibular second molars. Part II. C-shaped canals", Int Endod J, 23, pp.40~45 (1990)
- Melton DC, "Anatomical and histological features of C-shaped canals in mandibular second molars", J Endod, 17, pp.384~388 (1991)
- Mickel AK, "The role of apical size determination and enlargement in the reduction of intracanal bacteria", J Endod, 33, pp.21~23 (2007)
- Mizutani T, "Anatomical study of the root apex in the maxillary anterior teeth", J Endod, 18, pp.344~347 (1992)
- Paqué F, "Effects of root canal preparation on apical geometry assessed by micro-computed tomography", J Endod, 35, pp.1056~1059 (2009)
- Paqué F, "Apical fit of initial K-files in maxillary molars assessed by micro-computed tomography", Int Endod J, 43, pp.328~335 (2010)
- Pecora JD, "Influence of cervical preflaring on apical sile size determination", Int Endod J, 38, pp.430~435 (2005)
- Peters OA, "Current challenges and concepts in the preparation of root canal systems: a review", J Endod, 30, pp.559~567 (2004)
- Ricucci D, "Long-term follow-up on C-shaped mandibular molars", J Endod, 22, pp.185~187 (1996)
- Tan BT, "The quality of apical canal preparation using hand and rotary instruments with specific criteria for enlargement based on initial apical file size", J Endod, 28, pp.658~664 (2002)
- Tennert C, "The effect of cervical preflaring using different rotary nickel-titanium systems on the accuracy of apical file size determination", J Endod, 36, pp.1669~1672 (2010)
- Walton RE, "Principles and Practice of Endodontics", pp.166~181 (2002), WB Saunders
- Weiger R, "A clinical method to determine the optimal apical preparation size. Part I", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 102, pp.686~691 (2006)
- Weine FS, "Endodontic Therapy", pp.210~211 (1982), CV Mosby
- Wheeler RC, "Dental Anatomy, Physiology and Occlusion" (1974), WB Saunders
- Wu MK, "Does the first file to bind correspond to the diameter of the canal in the apical region", Int Endod J, 35, pp.264~267 (2002)
- Wu MK, "Prevalence and extent of long oval canals in the apical third", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 89, pp.739~ (2000)
- Yang ZP, "C-shaped root canals in mandibular second molars in a Chinese population", Endod Dent Traumatol, 4, pp.160~163 (1988)