{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/79999"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/79999","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Upper Airway Dimensions in Adult African American Patients Treated with Four First Premolar Extraction","abstract":"M.S.","abstract_html":"M.S.","abstract_has_math":false,"creators":["Tawila, Sami"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Al-Jewair, Thikriat","Orthodontics"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-07-30T15:11:44Z","date_published":"2019-07-30T15:11:44Z","updated_at":"2026-07-27T19:05:21Z","subjects":["dentistry"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/79999","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Al-Jewair, Thikriat","Orthodontics"]},{"key":"dc:creator","label":"Author","values":["Tawila, Sami"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-07-30T15:11:44Z","2019","2019-05-16 22:56:37"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["dentistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/79999"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["M.S.","Objectives: To evaluate the effects of fixed orthodontic treatment with first-premolar extraction on upper airway dimensions in African American adults compared to those treated without premolar extraction. Materials and Methods: This retrospective study was based on 50 adults with bimaxillary dentoalveolar protrusion who received full fixed orthodontic treatment with or without (n=25 per group) extraction of four first premolars. Lateral cephalometric records were obtained from the department of Orthodontics, University at Buffalo School of Dental Medicine and the Division of Orthodontics and Dentofacial Orthopedics, University of Rochester Eastman Institute for Oral Health. The inclusion criteria were healthy females and males, ages 18 and above, presenting with bimaxillary dentoalveolar protrusion. Cephalometric tracings and analyses were conducted by one investigator using Dolphin imaging software at two time points, T1= Pre-treatment, and T2= Post-comprehensive orthodontic treatment. Changes in dentoskeletal variables and upper airway dimensions were compared between the extraction and non-extraction groups using independent sample t-test. Results: The mean age of the sample was 28.9 (SD 7.7) years. Changes from T1 to T2 were found to be significant in both groups for U1-SN, IMPA, Upper lip to E-Plane, and Lower lip to E-Plane. The changes in the upper airway dimensions within the extraction and non-extraction groups, respectively were as follows: Superior posterior airway space (SPAS), 0.21mm (SD 3.21) vs 0.69mm (SD 2.51) (p - value < 0.05 ); Middle airway space, -0.10mm (SD 3.31) vs 0.54mm (SD 2.79); Inferior airway space, 0.46mm (SD 4.2) vs 0.19mm (SD 3.32). Between group comparisons showed that there was non-significant difference in all skeletal measurement when the means between the non-extraction and extraction groups were compared. Dentoalveolar measurements showed that lower and upper incisors were more retroclined in the extraction group. IMPA, and U1-SN measurements were reduced more in the extraction group by a mean of 4.8 degrees (P < 0.001) and 5.9 degrees (P = 0.021), respectively. Treatment changes for all airway dimensions were not significantly different between the extraction and non-extraction groups. Conclusion: This study found no statically significant difference in upper airway dimensions between the extraction and the non-extraction groups. Additionally, there was no statistically significant difference in upper airway measurements before and after premolar extraction. Premolar extraction does not influence the upper airway in adult African American populations. Key words: Bimaxillary proclination; Airway dimension; Bimaxillary protrusion; Cephalometrics; premolar extraction; African America."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Upper Airway Dimensions in Adult African American Patients Treated with Four First Premolar Extraction"]}]}],"canonical_facts":{"dc:contributor":["Al-Jewair, Thikriat","Orthodontics"],"dc:creator":["Tawila, Sami"],"dc:date":["2019-07-30T15:11:44Z","2019","2019-05-16 22:56:37"],"dc:description":["M.S.","Objectives: To evaluate the effects of fixed orthodontic treatment with first-premolar extraction on upper airway dimensions in African American adults compared to those treated without premolar extraction. Materials and Methods: This retrospective study was based on 50 adults with bimaxillary dentoalveolar protrusion who received full fixed orthodontic treatment with or without (n=25 per group) extraction of four first premolars. Lateral cephalometric records were obtained from the department of Orthodontics, University at Buffalo School of Dental Medicine and the Division of Orthodontics and Dentofacial Orthopedics, University of Rochester Eastman Institute for Oral Health. The inclusion criteria were healthy females and males, ages 18 and above, presenting with bimaxillary dentoalveolar protrusion. Cephalometric tracings and analyses were conducted by one investigator using Dolphin imaging software at two time points, T1= Pre-treatment, and T2= Post-comprehensive orthodontic treatment. Changes in dentoskeletal variables and upper airway dimensions were compared between the extraction and non-extraction groups using independent sample t-test. Results: The mean age of the sample was 28.9 (SD 7.7) years. Changes from T1 to T2 were found to be significant in both groups for U1-SN, IMPA, Upper lip to E-Plane, and Lower lip to E-Plane. The changes in the upper airway dimensions within the extraction and non-extraction groups, respectively were as follows: Superior posterior airway space (SPAS), 0.21mm (SD 3.21) vs 0.69mm (SD 2.51) (p - value < 0.05 ); Middle airway space, -0.10mm (SD 3.31) vs 0.54mm (SD 2.79); Inferior airway space, 0.46mm (SD 4.2) vs 0.19mm (SD 3.32). Between group comparisons showed that there was non-significant difference in all skeletal measurement when the means between the non-extraction and extraction groups were compared. Dentoalveolar measurements showed that lower and upper incisors were more retroclined in the extraction group. IMPA, and U1-SN measurements were reduced more in the extraction group by a mean of 4.8 degrees (P < 0.001) and 5.9 degrees (P = 0.021), respectively. Treatment changes for all airway dimensions were not significantly different between the extraction and non-extraction groups. Conclusion: This study found no statically significant difference in upper airway dimensions between the extraction and the non-extraction groups. Additionally, there was no statistically significant difference in upper airway measurements before and after premolar extraction. Premolar extraction does not influence the upper airway in adult African American populations. Key words: Bimaxillary proclination; Airway dimension; Bimaxillary protrusion; Cephalometrics; premolar extraction; African America."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/79999"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["dentistry"],"dc:title":["Upper Airway Dimensions in Adult African American Patients Treated with Four First Premolar Extraction"],"dc:type":["Text","Thesis"]},"updated_at":"2026-07-27T19:05:21Z"}