{"id":{"repo_id":"ankara","oai_identifier":"oai:dspace.ankara.edu.tr:20.500.12575/79698"},"canonical_url":"https://search.dev.ndltd.org/etd/ankara/oai:dspace.ankara.edu.tr:20.500.12575/79698","repository":{"repo_id":"ankara","name":"University of Ankara","base_url":"https://dspace.ankara.edu.tr/server/oai/request"},"display":{"title":"Eğri kanallarda farklı preparasyon tekniklerinin değerlendirilmesi ile ilgili bir araştırma","abstract":"Evaluation of Different Preparation Techniques in Curved Root Canals: an In Vitro Study In this study, the effects of Conventional Filing, Stepback, Stepdown, Crowndown, Roane, Ultrasonic and Sonic Instrumentation techniques were compared in curved canals in vitro. One hundred forty mesial root canals with curvatures of 25 to 50 degrees in freshly extracted human mandibular molars were randomly divided into seven instrumentation groups of 20 root canals each. After the roots were embedded in clear casting resin, the plastic blocks were sectioned horizontally at coronal, middle and apical levels and photographed before and after instrumentation. The amounts of dentin removed, the centering ratio, the directions and lengths of transportation and the final shapes of the instrumented canals were compared by using a computer with a digitized tablet. Conventional Filing Methods, Sonic Instrumentation and Roane Technique removed more dentin than the other techniques while Ultrasonic removed less dentin. In all seven techniques, the orijinal canals were transported mesially at coronal levels.distally in middle and mesially at apical level. There was a trend for Crowndown, Roane and Stepdown Techniques to remain centered in the canals.79 The greatest transportation was occured with Conventional Filing Methods and Sonic Instrumentation Techniques. The majority of canals in the Crowndown, Roane and Stepdown group were round whereas the majority in the Conventional Filing Methods were irregular.v","abstract_html":"Evaluation of Different Preparation Techniques in Curved Root Canals: an In Vitro Study In this study, the effects of Conventional Filing, Stepback, Stepdown, Crowndown, Roane, Ultrasonic and Sonic Instrumentation techniques were compared in curved canals in vitro. One hundred forty mesial root canals with curvatures of 25 to 50 degrees in freshly extracted human mandibular molars were randomly divided into seven instrumentation groups of 20 root canals each. After the roots were embedded in clear casting resin, the plastic blocks were sectioned horizontally at coronal, middle and apical levels and photographed before and after instrumentation. The amounts of dentin removed, the centering ratio, the directions and lengths of transportation and the final shapes of the instrumented canals were compared by using a computer with a digitized tablet. Conventional Filing Methods, Sonic Instrumentation and Roane Technique removed more dentin than the other techniques while Ultrasonic removed less dentin. In all seven techniques, the orijinal canals were transported mesially at coronal levels.distally in middle and mesially at apical level. There was a trend for Crowndown, Roane and Stepdown Techniques to remain centered in the canals.79 The greatest transportation was occured with Conventional Filing Methods and Sonic Instrumentation Techniques. The majority of canals in the Crowndown, Roane and Stepdown group were round whereas the majority in the Conventional Filing Methods were irregular.v","abstract_has_math":false,"creators":["Atalay, Recep"],"institution":"Fen Bilimleri Enstitüsü","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Diş Hekimliği","school":null,"contributors":[],"advisors":["Dalat, Dilek"],"committee_chairs":[],"committee_members":[],"year":1994,"date_issued":"1994","date_published":"1994","updated_at":"2026-07-24T00:54:26Z","subjects":["Dental pulpa boşluğu"],"languages":["tr"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/20.500.12575/79698","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Dalat, Dilek"]},{"key":"dc:contributor.department","label":"Department","values":["Diş Hekimliği"]},{"key":"dc:creator","label":"Author","values":["Atalay, Recep"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2022-04-28T08:19:59Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2022-04-28T08:19:59Z"]},{"key":"dc:date.issued","label":"Date","values":["1994"]},{"key":"dc:publisher","label":"Institution","values":["Fen Bilimleri Enstitüsü"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Dental pulpa boşluğu"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["tr"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/20.500.12575/79698"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Evaluation of Different Preparation Techniques in Curved Root Canals: an In Vitro Study In this study, the effects of Conventional Filing, Stepback, Stepdown, Crowndown, Roane, Ultrasonic and Sonic Instrumentation techniques were compared in curved canals in vitro. One hundred forty mesial root canals with curvatures of 25 to 50 degrees in freshly extracted human mandibular molars were randomly divided into seven instrumentation groups of 20 root canals each. After the roots were embedded in clear casting resin, the plastic blocks were sectioned horizontally at coronal, middle and apical levels and photographed before and after instrumentation. The amounts of dentin removed, the centering ratio, the directions and lengths of transportation and the final shapes of the instrumented canals were compared by using a computer with a digitized tablet. Conventional Filing Methods, Sonic Instrumentation and Roane Technique removed more dentin than the other techniques while Ultrasonic removed less dentin. In all seven techniques, the orijinal canals were transported mesially at coronal levels.distally in middle and mesially at apical level. There was a trend for Crowndown, Roane and Stepdown Techniques to remain centered in the canals.79 The greatest transportation was occured with Conventional Filing Methods and Sonic Instrumentation Techniques. The majority of canals in the Crowndown, Roane and Stepdown group were round whereas the majority in the Conventional Filing Methods were irregular.v"]},{"key":"dc:title","label":"Title","values":["Eğri kanallarda farklı preparasyon tekniklerinin değerlendirilmesi ile ilgili bir araştırma"]}]}],"canonical_facts":{"dc:contributor.advisor":["Dalat, Dilek"],"dc:contributor.department":["Diş Hekimliği"],"dc:creator":["Atalay, Recep"],"dc:date.accessioned":["2022-04-28T08:19:59Z"],"dc:date.available":["2022-04-28T08:19:59Z"],"dc:date.issued":["1994"],"dc:description.abstract":["Evaluation of Different Preparation Techniques in Curved Root Canals: an In Vitro Study In this study, the effects of Conventional Filing, Stepback, Stepdown, Crowndown, Roane, Ultrasonic and Sonic Instrumentation techniques were compared in curved canals in vitro. One hundred forty mesial root canals with curvatures of 25 to 50 degrees in freshly extracted human mandibular molars were randomly divided into seven instrumentation groups of 20 root canals each. After the roots were embedded in clear casting resin, the plastic blocks were sectioned horizontally at coronal, middle and apical levels and photographed before and after instrumentation. The amounts of dentin removed, the centering ratio, the directions and lengths of transportation and the final shapes of the instrumented canals were compared by using a computer with a digitized tablet. Conventional Filing Methods, Sonic Instrumentation and Roane Technique removed more dentin than the other techniques while Ultrasonic removed less dentin. In all seven techniques, the orijinal canals were transported mesially at coronal levels.distally in middle and mesially at apical level. There was a trend for Crowndown, Roane and Stepdown Techniques to remain centered in the canals.79 The greatest transportation was occured with Conventional Filing Methods and Sonic Instrumentation Techniques. The majority of canals in the Crowndown, Roane and Stepdown group were round whereas the majority in the Conventional Filing Methods were irregular.v"],"dc:identifier.uri":["http://hdl.handle.net/20.500.12575/79698"],"dc:language.iso":["tr"],"dc:publisher":["Fen Bilimleri Enstitüsü"],"dc:subject":["Dental pulpa boşluğu"],"dc:title":["Eğri kanallarda farklı preparasyon tekniklerinin değerlendirilmesi ile ilgili bir araştırma"],"dc:type":["doctoralThesis"]},"updated_at":"2026-07-24T00:54:26Z"}