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Type: Artigo de periódico
Title: Effect Of Sonic And Ultrasonic Retrograde Cavity Preparation On The Integrity Of Root Apices Of Freshly Extracted Human Teeth: Scanning Electron Microscopy Analysis.
Author: Gondim, Eudes
Gomes, Brenda Paula Figueiredo Almeida de
Ferraz, Caio Cesar Randi
Teixeira, Fabricio Batista
Souza-Filho, Francisco José de
Abstract: Sonic and ultrasonic root-end preparation devices permit the preparation of conservative and straight cavities. However, microfractures and marginal chipping can occur due to the vibratory action of such instruments. The purpose of this study was to evaluate the effect of retrograde preparations by using sonic and ultrasonic tips on the integrity of root-end surfaces. Eighty, human anterior teeth were grouped according to size and treated as follows: treatment 1: root-end resection (RR) and root-end cavity preparation (RP) with KIS ultrasonic retrotip; treatment 2: RR and RP with Satelec S12/90 (no diamond coating) ultrasonic retrotip; treatment 3: RR and RP with a diamond-coated retrotip attached to a sonic device (Sonics); treatment 4: RR and RP with Satelec S12/90D (diamond coated) ultrasonic retrotip. The root-end surface topographies were assayed by means of polyvinylsiloxane impressions and epoxy resin replicas. SEM pictures of each sample were taken before and after preparation, and the images were evaluated by using an image processing and analysis system. The parameters evaluated were shape quality, presence of cracks, and marginal chipping. The results showed no statistically significant differences among anatomic groups, treatments, or tooth sizes (p > 0.05). Because treatment 3 removed more dental structure than the others did, its use on small teeth is inadvisable.
Subject: Apicoectomy
Dental Cementum
Dental Impression Materials
Dental Pulp Cavity
Epoxy Resins
Equipment Design
Image Processing, Computer-assisted
Microscopy, Electron, Scanning
Replica Techniques
Root Canal Preparation
Statistics As Topic
Surface Properties
Tooth Apex
Citation: Journal Of Endodontics. v. 28, n. 9, p. 646-50, 2002-Sep.
Rights: fechado
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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