{"id":{"repo_id":"utswmed","oai_identifier":"oai:utswmed-ir.tdl.org:2152.5/10627"},"canonical_url":"https://search.dev.ndltd.org/etd/utswmed/oai:utswmed-ir.tdl.org:2152.5/10627","repository":{"repo_id":"utswmed","name":"University of Texas Southwestern Medical Center","base_url":"https://utswmed-ir.tdl.org/server/oai/request"},"display":{"title":"The Role of Pelvic Tilt in Femoroacetabular Impingement Syndrome, Hip Dysplasia, and Osteoarthritis","abstract":"The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.","abstract_html":"The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.","abstract_has_math":false,"creators":["Thummala, Abhinav Reddy"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Wells, Joel","Chang, Mary","Chhabra, Avneesh"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-06-03T19:58:32Z","date_published":"2025-06-03T19:58:32Z","updated_at":"2026-07-24T05:52:26Z","subjects":["Femoracetabular Impingement","Hip Dislocation","Osteoarthritis, Hip","Arthroplasty, Replacement, Hip"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["1522122387"],"render_values":[{"text":"1522122387","href":null,"code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/2152.5/10627","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wells, Joel","Chang, Mary","Chhabra, Avneesh"]},{"key":"dc:creator","label":"Author","values":["Thummala, Abhinav Reddy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-06-03T19:58:32Z","2023-05","May 2023","2025-06-03T19:58:33Z"]},{"key":"dc:type","label":"Dc Type","values":["Thesis","text"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Femoracetabular Impingement","Hip Dislocation","Osteoarthritis, Hip","Arthroplasty, Replacement, Hip"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2152.5/10627","1522122387"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.","BACKGROUND: In femoroacetabular impingement syndrome (FAIS), pelvic tilt is believed to impact disease progression and symptomology by influencing impingement free range of motion, with similar associations observed in hip dysplasia through modification of acetabular coverage and osteoarthritis via alterations in joint movements. While the apparent role of pelvic tilt in hip pathology has been reported, the exact effects of many therapeutic interventions on pelvic tilt are unknown. OBJECTIVE: The primary purpose of these studies are two-fold: first, to investigate the relationship between preoperative pelvic tilt and change in postoperative outcomes in patients undergoing surgery for either FAIS or hip dysplasia. Second, to investigate the role of surgical intervention on pelvic tilt in FAIS, dysplasia, and osteoarthritis patients. METHODS: A prospective hip preservation registry of demographic, radiographic, and outcomes data for all patients operated on by the senior author between October 2016 and January 2020 were queried, and all patients who underwent surgery with a primary diagnosis of FAIS, hip dysplasia, or osteoarthritis were considered for inclusion. Pelvic tilt was assessed in the standing position on the AP radiograph with the PS-SI distance both pre and postoperatively, and the outcomes were assessed with the HOS, iHOT-12, UCLA Activity Score, EQ-VAS, and HHS. RESULTS: Regarding the first study question, the average PS-SI distance was 86.4±18.3 mm for the FAIS group and 96.2±15.1 mm for the dysplasia group. Analysis demonstrated a positive relationship between pelvic tilt and change in iHOT12 (rs = 0.262, p=0.019) for all 89 patients with hip pathology. No other significant relationships were observed. Regarding the second research question, the FAIS + dysplasia + OA cohort had an average preoperative PS-SI distance of 73.9±22.9 mm and an average postoperative PS-SI distance of 64.9±25.5 mm on the standing AP radiograph. The results from the linear regression revealed a significant negative predictive association between standing preoperative PS-SI distance and standing postoperative PS-SI distance for all 3 cohorts of patients (p<0.0001 for all groups). CONCLUSION: The improvement in iHOT12 was greater for patients with more anterior tilt and less for patients with posterior pelvic tilt regardless of underlying hip etiology. There is a statistically significant decrease in pelvic tilt from pre to postoperatively in FAIS, dysplasia, and OA patients undergoing hip surgery. These results confirm that surgical intervention alters the pelvic orientation and indicate that impact of hip surgery on pelvic tilt should be considered within the therapeutic plan in order to optimize pelvic orientation."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The Role of Pelvic Tilt in Femoroacetabular Impingement Syndrome, Hip Dysplasia, and Osteoarthritis"]}]}],"canonical_facts":{"dc:contributor":["Wells, Joel","Chang, Mary","Chhabra, Avneesh"],"dc:creator":["Thummala, Abhinav Reddy"],"dc:date":["2025-06-03T19:58:32Z","2023-05","May 2023","2025-06-03T19:58:33Z"],"dc:description":["The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.","BACKGROUND: In femoroacetabular impingement syndrome (FAIS), pelvic tilt is believed to impact disease progression and symptomology by influencing impingement free range of motion, with similar associations observed in hip dysplasia through modification of acetabular coverage and osteoarthritis via alterations in joint movements. While the apparent role of pelvic tilt in hip pathology has been reported, the exact effects of many therapeutic interventions on pelvic tilt are unknown. OBJECTIVE: The primary purpose of these studies are two-fold: first, to investigate the relationship between preoperative pelvic tilt and change in postoperative outcomes in patients undergoing surgery for either FAIS or hip dysplasia. Second, to investigate the role of surgical intervention on pelvic tilt in FAIS, dysplasia, and osteoarthritis patients. METHODS: A prospective hip preservation registry of demographic, radiographic, and outcomes data for all patients operated on by the senior author between October 2016 and January 2020 were queried, and all patients who underwent surgery with a primary diagnosis of FAIS, hip dysplasia, or osteoarthritis were considered for inclusion. Pelvic tilt was assessed in the standing position on the AP radiograph with the PS-SI distance both pre and postoperatively, and the outcomes were assessed with the HOS, iHOT-12, UCLA Activity Score, EQ-VAS, and HHS. RESULTS: Regarding the first study question, the average PS-SI distance was 86.4±18.3 mm for the FAIS group and 96.2±15.1 mm for the dysplasia group. Analysis demonstrated a positive relationship between pelvic tilt and change in iHOT12 (rs = 0.262, p=0.019) for all 89 patients with hip pathology. No other significant relationships were observed. Regarding the second research question, the FAIS + dysplasia + OA cohort had an average preoperative PS-SI distance of 73.9±22.9 mm and an average postoperative PS-SI distance of 64.9±25.5 mm on the standing AP radiograph. The results from the linear regression revealed a significant negative predictive association between standing preoperative PS-SI distance and standing postoperative PS-SI distance for all 3 cohorts of patients (p<0.0001 for all groups). CONCLUSION: The improvement in iHOT12 was greater for patients with more anterior tilt and less for patients with posterior pelvic tilt regardless of underlying hip etiology. There is a statistically significant decrease in pelvic tilt from pre to postoperatively in FAIS, dysplasia, and OA patients undergoing hip surgery. These results confirm that surgical intervention alters the pelvic orientation and indicate that impact of hip surgery on pelvic tilt should be considered within the therapeutic plan in order to optimize pelvic orientation."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2152.5/10627","1522122387"],"dc:language":["en"],"dc:subject":["Femoracetabular Impingement","Hip Dislocation","Osteoarthritis, Hip","Arthroplasty, Replacement, Hip"],"dc:title":["The Role of Pelvic Tilt in Femoroacetabular Impingement Syndrome, Hip Dysplasia, and Osteoarthritis"],"dc:type":["Thesis","text"]},"updated_at":"2026-07-24T05:52:26Z"}