The initial stability of a primary femoral hip prosthesis is important to the long-term survivorship and efficacy of the prosthesis. In the absence of adequate initial stability, micromotion between the prosthesis and the proximal endosteal femoral bone will result in partial fibrous encapsulation of the prosthesis, rather than direct bony apposition. Long-term survivorship of the prosthesis may suffer as a result of the lack of long-term osteointegration due to early prosthesis instability. The present study demonstrates the effect of a medial collar on the initial stability of a triple-tapered, broach-only, proximally porous-coated primary cementless hip prosthesis using a computational analysis. In a computer model, collared and collarless prostheses are placed into six femora from six different patients and subjected to two separate loading conditions encountered daily. The presence of a medial collar was found to produce a significant reduction in the total micromotion and subsidence of the femoral hip prosthesis.
","abstract_html":"<p>The initial stability of a primary femoral hip prosthesis is important to the long-term survivorship and efficacy of the prosthesis. In the absence of adequate initial stability, micromotion between the prosthesis and the proximal endosteal femoral bone will result in partial fibrous encapsulation of the prosthesis, rather than direct bony apposition. Long-term survivorship of the prosthesis may suffer as a result of the lack of long-term osteointegration due to early prosthesis instability. The present study demonstrates the effect of a medial collar on the initial stability of a triple-tapered, broach-only, proximally porous-coated primary cementless hip prosthesis using a computational analysis. In a computer model, collared and collarless prostheses are placed into six femora from six different patients and subjected to two separate loading conditions encountered daily. The presence of a medial collar was found to produce a significant reduction in the total micromotion and subsidence of the femoral hip prosthesis.</p>","abstract_has_math":false,"creators":["Huff, Daniel N."],"institution":null,"degree_name":"M.S.","degree_level":"Masters Thesis","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Paul J. Rullkoetter"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-11-01T07:00:00Z","date_published":"2012-11-01T07:00:00Z","updated_at":"2026-07-24T02:01:25Z","subjects":["Femoral hip prosthesis","Stability","Bioengineering","Biological Engineering","Biomechanical Engineering","Biomedical Engineering and Bioengineering","Engineering","Mechanical Engineering"],"languages":["en"],"rights":["Copyright is held by the author. This work may only be accessed by members of the University of Denver community. The work is provided by permission of the author for individual research purposes only and may not be further copied or distributed. User is responsible for all copyright compliance.
"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.du.edu/restrictedetd/55","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Paul J. Rullkoetter"]},{"key":"dc:creator","label":"Author","values":["Huff, Daniel N."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_level","label":"Degree Level","values":["Masters Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Femoral hip prosthesis","Stability","Bioengineering","Biological Engineering","Biomechanical Engineering","Biomedical Engineering and Bioengineering","Engineering","Mechanical Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author. This work may only be accessed by members of the University of Denver community. The work is provided by permission of the author for individual research purposes only and may not be further copied or distributed. User is responsible for all copyright compliance.
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"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The Effect of a Medial Collar on the Initial Stability of a Cementless Primary Femoral Hip Prosthesis"]}]}],"canonical_facts":{"dc:contributor":["Paul J. Rullkoetter"],"dc:creator":["Huff, Daniel N."],"dc:description.abstract":["The initial stability of a primary femoral hip prosthesis is important to the long-term survivorship and efficacy of the prosthesis. In the absence of adequate initial stability, micromotion between the prosthesis and the proximal endosteal femoral bone will result in partial fibrous encapsulation of the prosthesis, rather than direct bony apposition. Long-term survivorship of the prosthesis may suffer as a result of the lack of long-term osteointegration due to early prosthesis instability. The present study demonstrates the effect of a medial collar on the initial stability of a triple-tapered, broach-only, proximally porous-coated primary cementless hip prosthesis using a computational analysis. In a computer model, collared and collarless prostheses are placed into six femora from six different patients and subjected to two separate loading conditions encountered daily. The presence of a medial collar was found to produce a significant reduction in the total micromotion and subsidence of the femoral hip prosthesis.
"],"dc:format":["application/pdf"],"dc:identifier":["https://digitalcommons.du.edu/restrictedetd/55"],"dc:language":["en"],"dc:rights":["Copyright is held by the author. This work may only be accessed by members of the University of Denver community. The work is provided by permission of the author for individual research purposes only and may not be further copied or distributed. User is responsible for all copyright compliance.
"],"dc:subject":["Femoral hip prosthesis","Stability","Bioengineering","Biological Engineering","Biomechanical Engineering","Biomedical Engineering and Bioengineering","Engineering","Mechanical Engineering"],"dc:title":["The Effect of a Medial Collar on the Initial Stability of a Cementless Primary Femoral Hip Prosthesis"],"thesis:degree_level":["Masters Thesis"],"thesis:degree_name":["M.S."]},"updated_at":"2026-07-24T02:01:25Z"}