Corona TMG, Figueroa CTM, Bonilla lDO, López CAG, Díaz PR

Language: Spanish
References: 0
Page: 1310-1315
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ABSTRACT

Introduction. 1n o root canal treotment is basic anotomical knowledge and the variables that ma y a rise in the dentol organs to ensure and effective therapy. The theories thot exploin the existence of number of highly root thon normal, reefer's the hyperactivity ond morphological chonge in one oreo of the Hertwig's Epithelial root sheoth, which causes dental papilla invagination forming on accessory roat. Target. Evaluate the most effedive method of instrumentation for the maxillary first premolar complicated anatomy. Methodology. Universe: 1500 dental organs. Sample: 83 maxillary first premolars (MFP), clossified by the number of roots; 19 with one root, 48 two roots, 17 three roots. Study: Experimental, descriptive, transversal. Biomechonicol instrumentotionwas performed using threetechniques: Step Back, Crown Down and Circumferential. Results. Circ:umferential: optimum 5.55 %, 27.77% acceptable, questionable 66.66%. Crown Down: Optimum 16.66%44.44% acceptable, questionable 38.88%. Step Back: Optimum 70.96%29.03% occeptoble, questionoble O%. Conclusion. In the MFP three roots biomechonicol instrumentotion is compromising, becouse the buccol roots ore usuolly very narrow, winding curves. There is no ideal technique; howeverthe Step Backthrow excellent results in all tests, Crown Down in MFP Circumferential two roots and the leost recommended to presentíng more operative accidents.