| Título: | A Comparative Study on Rotary Mtwo Versus Passive Step Back of Hand K-File in Preparation of Extracted Curved Root Canals |
| Autores: |
Laaya, Safi; Department of Endodontics, Dental School, Shiraz University of Medical Science, Shiraz, Iran Khojastehpour, Leila; Department of Oral Radiology, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran Layeghnejad, Abdol Hosein; General Practitioner. Layeghnejad, Abdol Hosein; General Practitioner, Shiraz, Iran |
| Fecha: | 2008-11-02 |
| Publicador: |
Iranian Endodontic Journal محله ایرانی اندودونتیکس |
| Fuente: |
Ver documento |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: | Hand K-File; Mtwo Rotary Instrumentation; Passive Step Back; Technique |
| Descripción: | INTRODUCTION: The preparation of the root canal space includes debridement, shaping and apical preparation. These procedures are challenging and constitute. The recent introduction of automated techniques for canal preparation has created considerable interest. The aim of this study was to test shaping ability of one hand instrumentation (passive step-back technique) and new rotary NiTi system (Mtwo instrumentation) in curved root canals. MATERIALS AND METHODS: A total number of 40 curved molars selected for this in vitro study, 20 canals for each group. The mean of canal curvature in studied groups was similar. After preparation of access cavity, samples were divided into two groups. A custom made block was used for standardization of radiograph beam angel before and after preparation. In group 1, samples instrumented with passive step-back technique using stainless steel K-file, Gates Glidden and Pesso reamers. Mtwo NiTi rotary file and Endo IT power driven motor were used for instrumentation of samples in group 2. Transportation of canals curvature (loss of primary curvature) after canal preparation was assessed for each sample with the aid of AutoCAD 2007 software. Stereomicroscope provided data for measurement of changes in working length after canal preparation. RESULTS: The mean of changes in canals curvature (canal transportation) and mean of working length changes in group 1 (passive step-back technique) were 11.77 degree and 0.202 mm (P<0.001) and in group 2 (rotary Mtwo) were 5.58 degree and 0.202 mm (P<0.001). According to the present results, the original canal curvature was maintained significantly better with automated Mtwo files than with hand instrumentation. CONCLUSION: These can be hypothesized that the instrumentation with Mtwo NiTi rotary file preserves the canal curvature adequately. |
| Idioma: | Inglés |
1 Effect of Different Luting Cements on Fracture Resistance in Endodontically Treated Teeth por Mohammadi, Narmin; Department of Operative Dentistry, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran,Ajami, Amir Ahmad; Department of Operative Dentistry, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran,Kimyai, Soodabeh; Department of Operative Dentistry, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran,Rezaei Aval, Mojdeh; Department of Operative Dentistry, Dental School, Babol University of Medical Sciences, Babol, Iran | 6 A Digital Stereomicroscopic Study of the Furcation Wall Thickness of Mesiobuccal Roots of Maxillary First and Second Molars por Shahravan, Arash; Department of Endodontics, Dental School, Kerman University of Medical Sciences, Kerman Oral and Dental Diseases Research Center, Kerman, Iran,Rekabi, Alireza; Department of Endodontics, Dental School, Kerman University of Medical Sciences, Kerman, Iran.,Shahabi, Hasan; Department of Endodontics, Dental School, Kerman University of Medical Sciences, Kerman, Iran.,Ashuri, Rezvan; Department of Endodontics, Dental School, Kerman University of Medical Sciences, Kerman, Iran.,Mirzazadeh, Ali; MPH in Epidemiology and Biostatistics, Physiology Research Center, Kerman University of Medical Sciences, Kerman, Iran.,Rad, Maryam; Department of Oral Medicine, Dental School, Kerman University of Medical Sciences, Kerman Oral and Dental Diseases Research Center, Kerman, Iran.,Haghani, Jahangir; Department of Radiology, Dental School, Kerman University of Medical Sciences, Kerman Oral and Dental Diseases Research Center, Kerman, Iran |
2 Surgical alternative for treatment of vertical root fracture: A case report por Silva, Emmanuel João Nogueira Leal da; Piracicaba Dental School - State University of Campinas,Santos, Gustavo Romão dos; UERJ,Krebs, Renato Liess; UERJ,Coutinho-Filho, Tauby de Souza; UERJ | 7 Repair of an Extensive Furcation Perforation with CEM Cement: A Case Study por Eghbal, Mohammad Jafar,Fazlyab, Mahta,Asgary, Saeed |
3 Particle size of a new endodontic cement compared to Root MTA and calcium hydroxide por Soheilipour, Elham; Researcher, Dental Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Kheirieh, Sanam; Researcher, Iranian Center for Endodontic Research, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Madani, Majid; Researcher, Sympatec Co., Tehran, Iran.,Akbarzadeh Baghban, Alireza; Department of Biostatistics, Paramedical School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Asgary, Saeed; Department of Endodontics, Iranian Center for Endodontic Research, Dental Research Center, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran. | 8 Sealing ability promoted by three different endodontic sealers por Silva, Graziele; State University of Southwest Bahia,Silva, Emmanuel João Nogueira Leal da; Piracicaba Dental School - State University of Campinas,Silva, Juliana Melo da; Federal University of Pará,Andrade-Júnior, Carlos Vieira; State University of Southwest Bahia,Ferraz, Caio César Randi; Piracicaba Dental School - State University of Campinas |
4 Spiral Computed Tomographic Evaluation and Endodontic Management of a Mandibular Second Molar with Four Roots. A Case Report and Literature Review por Purra, Aamir Rashid,Mushtaq, Mubashir,Farooq, Riyaz,Farooq, Riyaz | 9 Working Length Changes Following Straight-Line Access and Different Coronal Flaring Methods por Sadeghi, Shiva; Department of Endodontics, Dental School, Guilan University of Medical Sciences, Rasht, Iran,Doago, Zeinab; General Practitioner, Rasht, Iran |
5 A Comparison between the Raypex5 Apex Locator and Conventional Radiography for Determining Working Length of Straight and Curved Canals por Sadeghi, Shiva; Department of Endodontics, Dental School, Guilan University of Medical Sciences, Rasht, Iran,Abolghasemi, Masoomeh; Private practice, Rasht, Iran | 10 Effect of hydroxyapatite and bovine serum albumin on the antibacterial activity of MTA por Mohammadi, Zahed,Shalavi, Sousan; 2. Dental Student, Hamedan University of Medical Sciences, Hamedan, Iran |