An in vivo evaluation of different methods of working length determination. 2013

Jyoti Mandlik, and Nitin Shah, and Kalpana Pawar, and Paras Gupta, and Sarita Singh, and Shoaib Ali Shaik
Associate Professor, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Deemed University Dental College and Hospital, Pune, Maharashtra, India, e-mail: drjyoti8@gmail.com.

OBJECTIVE The purpose of this in vivo study was to compare the ability of digital tactile, digital radiographic and electronic methods to determine reliability in locating the apical constriction. METHODS Informed consent was obtained from patients scheduled for orthodontic extraction. The teeth were anesthetized, isolated and accessed. The canals were negotiated, pulp chamber and canals were irrigated and pulp was extirpated. The working length was then evaluated for each canal by digital tactile sensation, an electronic apex locator (The Root ZX) and digital radiography. The readings were then compared with post-extraction working length measurements. RESULTS The percentage accuracy indicated that EAL method (Root ZX) shows maximum accuracy, i.e. 99.85% and digital tactile and digital radiographic method (DDR) showed 98.20 and 97.90% accuracy respectively. CONCLUSIONS Hence, it can be concluded that the EAL method (Root ZX) produced most reliable results for determining the accurate working length.

UI MeSH Term Description Entries
D007180 Incisor Any of the eight frontal teeth (four maxillary and four mandibular) having a sharp incisal edge for cutting food and a single root, which occurs in man both as a deciduous and a permanent tooth. (Jablonski, Dictionary of Dentistry, 1992, p820) Incisors
D009811 Odontometry Measurement of tooth characteristics.
D003786 Dental Pulp Cavity The space in a tooth bounded by the dentin and containing the dental pulp. The portion of the cavity within the crown of the tooth is the pulp chamber; the portion within the root is the pulp canal or root canal. Pulp Canal,Pulp Chamber,Root Canal,Cavities, Dental Pulp,Cavity, Dental Pulp,Dental Pulp Cavities,Pulp Cavities, Dental,Pulp Cavity, Dental,Canal, Pulp,Canal, Root,Canals, Pulp,Canals, Root,Chamber, Pulp,Chambers, Pulp,Pulp Canals,Pulp Chambers,Root Canals
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001641 Bicuspid One of the eight permanent teeth, two on either side in each jaw, between the canines (CUSPID) and the molars (MOLAR), serving for grinding and crushing food. The upper have two cusps (bicuspid) but the lower have one to three. (Jablonski, Dictionary of Dentistry, 1992, p822) Premolar,Bicuspids,Premolars
D014096 Tooth, Supernumerary An extra tooth, erupted or unerupted, resembling or unlike the other teeth in the group to which it belongs. Its presence may cause malposition of adjacent teeth or prevent their eruption. Molar, Fourth,Teeth, Supernumerary,Fourth Molar,Fourth Molars,Molars, Fourth,Supernumerary Teeth,Supernumerary Tooth
D014110 Touch Sensation of making physical contact with objects, animate or inanimate. Tactile stimuli are detected by MECHANORECEPTORS in the skin and mucous membranes. Tactile Sense,Sense of Touch,Taction,Sense, Tactile,Senses, Tactile,Tactile Senses,Tactions,Touch Sense,Touch Senses
D055615 Electrical Equipment and Supplies Apparatus and instruments that generate and operate with ELECTRICITY, and their electrical components. Electronic Equipment and Supplies
D018915 Root Canal Preparation Various preparatory steps prior to ROOT CANAL THERAPY by extirpation of diseased pulp and preparation of access cavity to receive the sealing material. Access Cavity Preparation,Endodontics Access Cavity Preparation,Access Cavity Preparations,Preparation, Access Cavity,Preparation, Root Canal,Root Canal Preparations
D019227 Tooth Apex The tip or terminal end of the root of a tooth. (Jablonski, Dictionary of Dentistry, 1992, p62) Apical Foramen,Tooth Apices,Apex, Tooth,Apices, Tooth,Foramen, Apical

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