{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T10:42:45Z","timestamp":1776940965447,"version":"3.51.4"},"reference-count":25,"publisher":"SLACK, Inc.","issue":"12","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Orthopedics"],"published-print":{"date-parts":[[2013,12]]},"abstract":"<jats:p>Tapered cementless femoral components have been used in total hip arthroplasty constructs for more than 20 years. In the past 5 to 10 years, these stems have gained popularity in the United States. The purpose of this study was to evaluate the results of the authors\u2019 initial experience using a contemporary tapered, proximally porous-coated, titanium femoral component at 4 to 6 years of follow-up. Eighty-eight patients underwent 100 total hip arthroplasties using the Summit stem (DePuy, Warsaw, Indiana) and a cementless acetabular component. Average age at the time of surgery was 61.6 years. Patients were prospectively followed for 4 to 6 years or until death. Patients were evaluated clinically using Harris Hip Scores and the need for revision. Radiographs were evaluated for femoral loosening and osteolysis. At final follow-up, no hips had been revised for femoral or acetabular loosening. Two hips required revision for dislocation and 1 for early femoral fracture. Bony ingrowth was seen in all but 2 femoral components. There was 1 instance of proximal femoral osteolysis and none distally on radiographs (cross-linked polyethylene was used in 73% of cases). There were 2 cases of severe stress shielding. One percent of cases had an early fracture (too tight) and 1% subsided without ingrowth (too loose). One patient reported significant thigh pain that did not limit activity. At final follow-up, the Summit femoral component demonstrated durable results at 4 to 6 years. Stability of the implant without femoral fracture is paramount.<\/jats:p>","DOI":"10.3928\/01477447-20131120-16","type":"journal-article","created":{"date-parts":[[2014,2,18]],"date-time":"2014-02-18T18:08:58Z","timestamp":1392746938000},"source":"Crossref","is-referenced-by-count":9,"title":["Four- to Six-year Follow-up of Primary THA Using Contemporary Titanium Tapered Stems"],"prefix":"10.3928","volume":"36","author":[{"given":"Devon D.","family":"Goetz","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arun","family":"Reddy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John J.","family":"Callaghan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David W.","family":"Hennessy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicholas A.","family":"Bedard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Steve S.","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2308","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200306000-00015"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200112000-00016"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-009-0906-7"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.00297"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0568-x"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-007-0337-6"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199711000-00018"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199608000-00012"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199072020-00002"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-196951040-00012"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199008000-00022"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.62B4.7430222"},{"key":"e_1_3_2_14_2","first-page":"17","article-title":"\u201cModes of failure\u201d of cemented stem-type femoral components: a radiographic analysis of loosening","volume":"141","author":"Gruen TA","year":"1979","unstructured":"Gruen TA, McNeice GM, Amstutz HC. \u201cModes of failure\u201d of cemented stem-type femoral components: a radiographic analysis of loosening. 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