Fracture resistance of calcium hydroxide-treated teeth filled with water- and PBS-mixed MTA
type: CreativeWork
description: Background: Traumatic dental injuries and dental caries are the main reasons why permanent teeth with immature, thin-walled roots lose their vitality and require endodontic treatment. Currently there are three endodontic treatment options to treat teeth with irreversibly damaged dental pulps and incomplete root formation. These are: pulp preservation, pulp regeneration and apical barrier induction with calcium hydroxide (CH) or production by placement of calcium silicate materials e.g. Mineral Trioxide Aggregate (MTA) in the apical part of the root canal.MTA apexification can be undertaken as a one-visit treatment or two-visit treatment with a short-term CH pre-medication. The majority of in vitro studies on influence of CH on fracture strength showed reduction in the mechanical properties of radicular dentine after 5 weeks exposure (Yassen & Platt 2013). MTA may increase the resistance to vertical root fracture of endodntically treated teeth treated in one-visit (EL-Ma'aita et al. 2014). Aim: To test, in vitro, the fracture strength of extracted human teeth restored with 5 mm apical plugs of MTA mixed with either water or Ca- and Mg-free Phosphate Buffered Saline (PBS), to establish whether these materials strengthen the root, and if an initial CH dressing has any effect on the fracture strength. Materials and methods: One hundred and eighty freshly extracted human permanent single-rooted teeth were used. The crowns of these teeth were removed and 10 mm long roots were prepared until a Largo Peeso drill of a size 150 ISO could be inserted 1 mm beyond the apical root-end, to resemble thin-walled incompletely formed roots. The roots were randomly allocated to nine groups (n=20). All samples were irrigated with equal volume of 5.25% sodium hypochlorite and 10% citric acid using a standardised protocol. Group Irrigation only - control group, received irrigation only; Group 2/52 CH - control group, dressed with calcium CH for 2 weeks; Group 12/52 CH - control group, dre…
abstract: Background: Traumatic dental injuries and dental caries are the main reasons why permanent teeth with immature, thin-walled roots lose their vitality and require endodontic treatment. Currently there are three endodontic treatment options to treat teeth with irreversibly damaged dental pulps and incomplete root formation. These are: pulp preservation, pulp regeneration and apical barrier induction with calcium hydroxide (CH) or production by placement of calcium silicate materials e.g. Mineral Trioxide Aggregate (MTA) in the apical part of the root canal.MTA apexification can be undertaken as a one-visit treatment or two-visit treatment with a short-term CH pre-medication. The majority of in vitro studies on influence of CH on fracture strength showed reduction in the mechanical properties of radicular dentine after 5 weeks exposure (Yassen & Platt 2013). MTA may increase the resistance to vertical root fracture of endodntically treated teeth treated in one-visit (EL-Ma'aita et al. 2014). Aim: To test, in vitro, the fracture strength of extracted human teeth restored with 5 mm apical plugs of MTA mixed with either water or Ca- and Mg-free Phosphate Buffered Saline (PBS), to establish whether these materials strengthen the root, and if an initial CH dressing has any effect on the fracture strength. Materials and methods: One hundred and eighty freshly extracted human permanent single-rooted teeth were used. The crowns of these teeth were removed and 10 mm long roots were prepared until a Largo Peeso drill of a size 150 ISO could be inserted 1 mm beyond the apical root-end, to resemble thin-walled incompletely formed roots. The roots were randomly allocated to nine groups (n=20). All samples were irrigated with equal volume of 5.25% sodium hypochlorite and 10% citric acid using a standardised protocol. Group Irrigation only - control group, received irrigation only; Group 2/52 CH - control group, dressed with calcium CH for 2 weeks; Group 12/52 CH - control group, dre…
author: Zuk, Ewa
language: eng
date published: 2016
date modified: 2026-07-24T02:08:19Z
provider: University of Dundee
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Dundee