주근단공의 조건에 따른 Root ZX의 정확성 평가
An evaluation of the accuracy of Root ZX according to the conditions of major apical foramen
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초록
Objectives: The purpose of this study was to assess the accuracy of Root ZX (J. Morita Corp.) according to the location of major foramen and open apex. Materials and Methods: 81 mandibular premolars with mature apices were selected. After access preparation, 27 teeth were instrumented to simulate open apices. 54 teeth were classified according to location of major foramen under surgical microscope (x16). The file was fixed at the location of apical constriction by Root ZX using glass ionomer cement. The apical 4 mm of the apex was exposed and photo was taken and the distance from file tip to the major foramen was measured by calibrating metal ruler on graph paper. The results were statistically analyzed using ANOVA and Scheffe test at p <0.05 level. Results: Mean distance from file tip to major foramen was 0.308 mm in Tip foramen group (I), 0.519 mm in Lateral foramen group (II) and 0.932 mm in open apex group (III). Root ZX located apical constriction accurately within ± 0.5 mm in group I of 85.71%, in group II of 59.09%, and in group III of 33.33%. There was a statistically significant difference between group I and III (p < 0.05). Conclusion: Root ZX located apical constriction accurately regardless of location of major foramen. However, Root ZX couldn’t find it in open apex. Clinicians have to use a combination of methods to determine an appropriate working length at open apex. It may be more successful than relying on just electronic apex locator.
Abstract
Objectives: The purpose of this study was to assess the accuracy of Root ZX (J. Morita Corp.) according to the location of major foramen and open apex. Materials and Methods: 81 mandibular premolars with mature apices were selected. After access preparation, 27 teeth were instrumented to simulate open apices. 54 teeth were classified according to location of major foramen under surgical microscope (x16). The file was fixed at the location of apical constriction by Root ZX using glass ionomer cement. The apical 4 mm of the apex was exposed and photo was taken and the distance from file tip to the major foramen was measured by calibrating metal ruler on graph paper. The results were statistically analyzed using ANOVA and Scheffe test at p <0.05 level. Results: Mean distance from file tip to major foramen was 0.308 mm in Tip foramen group (I), 0.519 mm in Lateral foramen group (II) and 0.932 mm in open apex group (III). Root ZX located apical constriction accurately within ± 0.5 mm in group I of 85.71%, in group II of 59.09%, and in group III of 33.33%. There was a statistically significant difference between group I and III (p < 0.05). Conclusion: Root ZX located apical constriction accurately regardless of location of major foramen. However, Root ZX couldn’t find it in open apex. Clinicians have to use a combination of methods to determine an appropriate working length at open apex. It may be more successful than relying on just electronic apex locator.
참고문헌 (36)
- Ding J, "Investigation of apex locators and related morphological factors", J Endod, 36, pp.1399~1403 (2010)
- Riccuci D, "Apical limit of root canal instrumentation and obturation, part 2. a histological study", Int Endod J, 31, pp.394~409 (1998)
- Suzuki K, "Experimental study on iontophoresis", J Jpn Stomatol, 16, pp.411~417 (1942)
- Sunada I, "New method for measuring the length of the root canal", J Dent Res, 41, pp.375~387 (1962)
- Kobayashi C, "New electronic canal measuring device based on the ratio method", J Endod, 20, pp.111~114 (1994)
- Kobayashi C, "Electronic canal length measurement", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 79, pp.226~231 (1995)
- Green D, "Stereomicroscopic study of 700 root apices of maxillary and mandibular posterior teeth", Oral Surg Oral Med Oral Pathol, 13, pp.728~733 (1960)
- Dummer PM, "The position and topography of the apical canal constriction and apical foramen", Int Endod J, 17, pp.192~198 (1984)
- Kuttler Y, "Microscopic investigation of root apexes", J Am Dent Assoc, 50, pp.544~552 (1955)
- Torabinejad M, "Endodontics: principles and practice 4th ed", pp.29~34 (2009), Saunders Elsevier
- Herrera M, "Influence of apical constriction diameter on Root ZX apex locator precision", J Endod, 33, pp.995~998 (2007)
- Stein TJ, "Influence of the major and minor foramen diameters on apical electronic probe measurements", J Endod, 16, pp.520~522 (1990)
- Fouad AF, "Accuracy of the Endex with variations in canal irrigants and foramen size", J Endod, 19, pp.63~67 (1993)
- Huang L, "An experimental study of the principle of electronic root canal measurement", J Endod, 13, pp.60~64 (1987)
- Hachmeister DR, "The sealing ability and retention characteristics of mineral trioxide aggregate in a model of apexification", J Endod, 28, pp.386~390 (2002)
- 조재현, "4종 전자근관장측정기의 정확성과 일관성에 관한 in vitrro연구", Restorative Dentistry and Endodontics, 31(5), pp.390~397 (2006), 대한치과보존학회
- Ponce EH, "The cemento-dentinocanal junction, the apical foramen, and the apical constriction: evaluation by optical microscopy", J Endod, 29, pp.214~219 (2003)
- Sjögren U, "Factors affecting the long-term results of endodontic treatment", J Endod, 16, pp.498~504 (1990)
- Pagavino G, "A SEM study of in vivo accuracy of the Root ZX electronic apex locator", J Endod, 24, pp.438~441 (1998)
- Goldberg F, "In vitro measurement accuracy of an electronic apex locator in teeth with simulated apical root resorption", J Endod, 28, pp.461~463 (2002)
- Nguyen HQ, "Electronic length measurement using small and large files in enlarged canals", Int Endod J, 29, pp.359~364 (1996)
- Kim BH, "A study on the accuracy of the ROOT-ZX in the canal with mechanically formed constriction", J Korean Acad Cons Dent, 24, pp.628~632 (1999)
- Czerw RJ, "An in vitro testof a simplified model to demonstrate the operation of electronic root canal measuring devices", J Endod, 20, pp.605~606 (1994)
- 조영린, "하악 대구치 근심근관에 대한 전자근관장 측정기의 정확도", Restorative Dentistry and Endodontics, 30(6), pp.477~485 (2005), 대한치과보존학회
- "Clinical accuracy of a new apex locator with an automatic compensation circuit", JOURNAL OF ENDODONTICS, 28, pp.706~709 (2002)
- Ounsi HF, "In vitro evaluation of the reliability of the Root ZX electronic apex locator", Int Endod J, 32, pp.120~123 (1999)
- Mayeda DL, "In vivo measurement accuracy in vital and necrotic canals with the Endex apex locator", J Endod, 19, pp.545~548 (1993)
- Herrera M, "Influence of apical constriction diameter on Root ZX apex locator precision", J Endod, 33, pp.995~998 (2007)
- Shabahang S, "An in vivo evaluation of Root ZX electronic apex locator", J Endod, 22, pp.616~618 (1996)
- Tselnik M, "An evaluation of root ZX and elements diagnostic apex locators", J Endod, 31, pp.507~509 (2005)
- Meredith N, "Gulabivala K. Electrical impedance measurements of root canal length", Endod Dent Traumatol, 13, pp.126~131 (1997)
- Nekoofar MH, "The fundamental operating principles of electronic root canal length measurement devices", Int Endod J, 39, pp.595~609 (2006)
- Berman LH, "Evaluation of the accuracy of the Neosono-D electronic apex locator", J Endod, (10), pp.164~167 (1984)
- Saito T, "Electronic determination of root canal length by newly developed measuring device. Influences of the diameter of apical foramen, the size of K-file and the root canal irrigants", Dent Jpn (Tokyo), 27, pp.65~72 (1990)
- Huang L, "An experimental study of the principle of electronic root canal measurement", J Endod, 13, pp.60~64 (1987)
- ElAyouti A, "Frequency of overinstrumentation with an acceptable radiographic working length", J Endod, 27, pp.49~52 (2001)