{"id":"https://openalex.org/W4213442001","doi":"https://doi.org/10.1007/s00784-022-04416-x","title":"Early extractions of premolars reduce age-related crowding of lower incisors: 50 years of follow-up","display_name":"Early extractions of premolars reduce age-related crowding of lower incisors: 50 years of follow-up","publication_year":2022,"publication_date":"2022-02-24","ids":{"openalex":"https://openalex.org/W4213442001","doi":"https://doi.org/10.1007/s00784-022-04416-x","pmid":"https://pubmed.ncbi.nlm.nih.gov/35201405","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/9203403"},"language":"en","primary_location":{"id":"doi:10.1007/s00784-022-04416-x","doi":"https://doi.org/10.1007/s00784-022-04416-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s00784-022-04416-x","pdf_url":"https://link.springer.com/content/pdf/10.1007/s00784-022-04416-x.pdf","source":{"id":"https://openalex.org/S103663982","display_name":"Clinical Oral Investigations","issn_l":"1432-6981","issn":["1432-6981","1436-3771"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319965","host_organization_name":"Springer Nature","host_organization_lineage":["https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Nature"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical Oral Investigations","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"https://link.springer.com/content/pdf/10.1007/s00784-022-04416-x.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5025566596","display_name":"Maurits Persson","orcid":"https://orcid.org/0000-0003-0584-4336","observed_orcids":["https://orcid.org/0000-0003-0584-4336"]},"institutions":[{"id":"https://openalex.org/I90267481","display_name":"Ume\u00e5 University","ror":"https://ror.org/05kb8h459","country_code":"SE","type":"education","lineage":["https://openalex.org/I90267481"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Maurits Persson","raw_affiliation_strings":["Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden"],"raw_orcid":"https://orcid.org/0000-0003-0584-4336","affiliations":[{"raw_affiliation_string":"Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden","institution_ids":["https://openalex.org/I90267481"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5042174162","display_name":"Nameer Al-Taai","orcid":"https://orcid.org/0000-0001-8512-5061","observed_orcids":["https://orcid.org/0000-0001-8512-5061"]},"institutions":[{"id":"https://openalex.org/I90267481","display_name":"Ume\u00e5 University","ror":"https://ror.org/05kb8h459","country_code":"SE","type":"education","lineage":["https://openalex.org/I90267481"]}],"countries":["SE"],"is_corresponding":true,"raw_author_name":"Nameer Al-Taai","raw_affiliation_strings":["Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden. nameer.al-taai@umu.se","Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden"],"raw_orcid":"https://orcid.org/0000-0001-8512-5061","affiliations":[{"raw_affiliation_string":"Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden. nameer.al-taai@umu.se","institution_ids":["https://openalex.org/I90267481"]},{"raw_affiliation_string":"Orthodontics, Department of Odontology, Ume\u00e5 University, 901 85, Ume\u00e5, Sweden","institution_ids":["https://openalex.org/I90267481"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083639932","display_name":"Karin Pihlgren","orcid":"https://orcid.org/0000-0003-2003-5051","observed_orcids":["https://orcid.org/0000-0003-2003-5051"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Karin Pihlgren","raw_affiliation_strings":["Department of Orthodontics, Public Dental Health Service, 631 88, Eskilstuna, Sweden"],"raw_orcid":"https://orcid.org/0000-0003-2003-5051","affiliations":[{"raw_affiliation_string":"Department of Orthodontics, Public Dental Health Service, 631 88, Eskilstuna, Sweden","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5045768692","display_name":"Anna Westerlund","orcid":"https://orcid.org/0000-0003-2438-8516","observed_orcids":["https://orcid.org/0000-0003-2438-8516"]},"institutions":[{"id":"https://openalex.org/I881427289","display_name":"University of Gothenburg","ror":"https://ror.org/01tm6cn81","country_code":"SE","type":"education","lineage":["https://openalex.org/I881427289"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Anna Westerlund","raw_affiliation_strings":["Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Box 450, 40530, Gothenburg, Sweden"],"raw_orcid":"https://orcid.org/0000-0003-2438-8516","affiliations":[{"raw_affiliation_string":"Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Box 450, 40530, Gothenburg, Sweden","institution_ids":["https://openalex.org/I881427289"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5042174162"],"corresponding_institution_ids":["https://openalex.org/I90267481"],"apc_list":{"value":4190,"currency":"USD","value_usd":4190},"apc_paid":{"value":4190,"currency":"USD","value_usd":4190},"fwci":2.338,"has_fulltext":true,"cited_by_count":11,"citation_normalized_percentile":{"value":0.86150148,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"26","issue":"6","first_page":"4525","last_page":"4535"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10356","display_name":"Orthodontics and Dentofacial Orthopedics","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3505","display_name":"Orthodontics"},"field":{"id":"https://openalex.org/fields/35","display_name":"Dentistry"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10356","display_name":"Orthodontics and Dentofacial Orthopedics","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3505","display_name":"Orthodontics"},"field":{"id":"https://openalex.org/fields/35","display_name":"Dentistry"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11919","display_name":"dental development and anomalies","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/3500","display_name":"General Dentistry"},"field":{"id":"https://openalex.org/fields/35","display_name":"Dentistry"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12367","display_name":"Dental Trauma and Treatments","score":0.0,"subfield":{"id":"https://openalex.org/subfields/3500","display_name":"General Dentistry"},"field":{"id":"https://openalex.org/fields/35","display_name":"Dentistry"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/premolar-extraction","display_name":"premolar extraction","score":0.9620000123977661},{"id":"https://openalex.org/keywords/space-deficiency","display_name":"space deficiency","score":0.9309999942779541},{"id":"https://openalex.org/keywords/class-i-malocclusion","display_name":"Class I malocclusion","score":0.9480000138282776},{"id":"https://openalex.org/keywords/long-term-follow-up","display_name":"long-term follow-up","score":0.6790000200271606},{"id":"https://openalex.org/keywords/incisor-alignment","display_name":"incisor alignment","score":0.5640000104904175},{"id":"https://openalex.org/keywords/early-orthodontic-treatment","display_name":"early orthodontic treatment","score":0.5450000166893005}],"concepts":[{"id":"https://openalex.org/C149333683","wikidata":"https://www.wikidata.org/wiki/Q5189188","display_name":"Crowding","level":2,"score":0.8762094974517822},{"id":"https://openalex.org/C2780641865","wikidata":"https://www.wikidata.org/wiki/Q839483","display_name":"Premolar","level":3,"score":0.8282837271690369},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.7666722536087036},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.6893396973609924},{"id":"https://openalex.org/C2776268601","wikidata":"https://www.wikidata.org/wiki/Q968808","display_name":"Occlusion","level":2,"score":0.6792493462562561},{"id":"https://openalex.org/C2778812414","wikidata":"https://www.wikidata.org/wiki/Q273543","display_name":"Incisor","level":2,"score":0.668056845664978},{"id":"https://openalex.org/C2780109367","wikidata":"https://www.wikidata.org/wiki/Q1320428","display_name":"Malocclusion","level":2,"score":0.6417986750602722},{"id":"https://openalex.org/C29694066","wikidata":"https://www.wikidata.org/wiki/Q118301","display_name":"Orthodontics","level":1,"score":0.5575801730155945},{"id":"https://openalex.org/C202271784","wikidata":"https://www.wikidata.org/wiki/Q189218","display_name":"Molar","level":2,"score":0.1632339060306549},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.11593955755233765},{"id":"https://openalex.org/C141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","level":1,"score":0.07639679312705994},{"id":"https://openalex.org/C169760540","wikidata":"https://www.wikidata.org/wiki/Q207011","display_name":"Neuroscience","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D000293","descriptor_name":"Adolescent","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001641","descriptor_name":"Bicuspid","qualifier_ui":"Q000601","qualifier_name":"surgery","is_major_topic":false},{"descriptor_ui":"D002508","descriptor_name":"Cephalometry","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D002648","descriptor_name":"Child","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005500","descriptor_name":"Follow-Up Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007180","descriptor_name":"Incisor","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D008310","descriptor_name":"Malocclusion","qualifier_ui":"Q000628","qualifier_name":"therapy","is_major_topic":true},{"descriptor_ui":"D008334","descriptor_name":"Mandible","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008875","descriptor_name":"Middle Aged","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":4,"locations":[{"id":"doi:10.1007/s00784-022-04416-x","doi":"https://doi.org/10.1007/s00784-022-04416-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s00784-022-04416-x","pdf_url":"https://link.springer.com/content/pdf/10.1007/s00784-022-04416-x.pdf","source":{"id":"https://openalex.org/S103663982","display_name":"Clinical Oral Investigations","issn_l":"1432-6981","issn":["1432-6981","1436-3771"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319965","host_organization_name":"Springer Nature","host_organization_lineage":["https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Nature"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical Oral Investigations","raw_type":"journal-article"},{"id":"pmid:35201405","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/35201405","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical oral investigations","raw_type":"Journal Article"},{"id":"pmh:oai:pubmedcentral.nih.gov:9203403","doi":null,"is_oa":true,"landing_page_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC9203403/","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clin Oral Investig","raw_type":"Text"},{"id":"pmh:oai:DiVA.org:umu-192890","doi":null,"is_oa":true,"landing_page_url":"http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-192890","pdf_url":null,"source":{"id":"https://openalex.org/S4306401559","display_name":"KTH Publication Database DiVA (KTH Royal Institute of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I86987016","host_organization_name":"KTH Royal Institute of Technology","host_organization_lineage":["https://openalex.org/I86987016"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.1007/s00784-022-04416-x","doi":"https://doi.org/10.1007/s00784-022-04416-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s00784-022-04416-x","pdf_url":"https://link.springer.com/content/pdf/10.1007/s00784-022-04416-x.pdf","source":{"id":"https://openalex.org/S103663982","display_name":"Clinical Oral Investigations","issn_l":"1432-6981","issn":["1432-6981","1436-3771"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319965","host_organization_name":"Springer Nature","host_organization_lineage":["https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Nature"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical Oral Investigations","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","score":0.9391000270843506,"display_name":"Good health and well-being"}],"study_designs":[{"id":"https://openalex.org/study-designs/observational-study","display_name":"Observational Study"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320323212","display_name":"G\u00f6teborgs Tandl\u00e4kare-S\u00e4llskap","ror":"https://ror.org/0570s7p64"},{"id":"https://openalex.org/F4320335552","display_name":"Medicinska fakulteten, Ume\u00e5 Universitet","ror":null}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W4213442001.pdf","grobid_xml":"https://content.openalex.org/works/W4213442001.grobid-xml"},"referenced_works_count":35,"referenced_works":["https://openalex.org/W81395931","https://openalex.org/W187527074","https://openalex.org/W1696677747","https://openalex.org/W1898152080","https://openalex.org/W1920003879","https://openalex.org/W1955552812","https://openalex.org/W1967396404","https://openalex.org/W1972501922","https://openalex.org/W1982222863","https://openalex.org/W1999149667","https://openalex.org/W2002935088","https://openalex.org/W2029570903","https://openalex.org/W2038590333","https://openalex.org/W2044656887","https://openalex.org/W2070512908","https://openalex.org/W2071064830","https://openalex.org/W2080437165","https://openalex.org/W2081575978","https://openalex.org/W2084969324","https://openalex.org/W2092410437","https://openalex.org/W2097800529","https://openalex.org/W2100289093","https://openalex.org/W2103642140","https://openalex.org/W2107318037","https://openalex.org/W2110038545","https://openalex.org/W2116280722","https://openalex.org/W2117086813","https://openalex.org/W2117189129","https://openalex.org/W2148322017","https://openalex.org/W2163265240","https://openalex.org/W2175414878","https://openalex.org/W2189948641","https://openalex.org/W2339827446","https://openalex.org/W3163736479","https://openalex.org/W3197847735"],"related_works":["https://openalex.org/W2339827446","https://openalex.org/W4283825189","https://openalex.org/W2143659368","https://openalex.org/W64058736","https://openalex.org/W2001467814","https://openalex.org/W2093916252","https://openalex.org/W2011082387","https://openalex.org/W4376134219","https://openalex.org/W2395647929","https://openalex.org/W2897949508"],"abstract_inverted_index":{"OBJECTIVES:":[0],"To":[1],"study":[2],"the":[3,15,55,114,153,156,163,167,175,181,188,218],"effects":[4],"of":[5,7,17,38,63,93,108,123,155,162,166,180,187],"extraction":[6,47,147],"four":[8],"premolars,":[9],"without":[10,74],"subsequent":[11,75],"orthodontic":[12,76],"treatment,":[13],"on":[14],"crowding":[16,68,135,228],"lower":[18,133,157,168,182,189],"incisors":[19,158,183],"in":[20,43,69,132,140,152,174,206,215,229],"subjects":[21,40,51,207],"between":[22],"early":[23],"adolescence":[24],"and":[25,103,110,119,127,142,159,184],"late":[26,171,194,204,252],"adulthood,":[27],"as":[28,138,217],"compared":[29],"to":[30,66,221,251],"untreated":[31,83],"subjects.":[32],"MATERIALS":[33],"AND":[34],"METHODS:":[35],"A":[36],"total":[37],"45":[39],"were":[41,98,136],"included":[42],"this":[44],"study.":[45],"The":[46,78,96,146],"group":[48,80,148],"comprised":[49],"24":[50],"who":[52,208],"had":[53,81],"all":[54,210],"first":[56,212],"premolars":[57,213],"removed":[58,214],"at":[59,89,105,120],"a":[60,70,86,90,230],"mean":[61,91,106,121],"age":[62,92],"11.5":[64],"years,":[65,112],"relieve":[67,222],"class":[71,231],"I":[72,232],"malocclusion":[73],"treatment.":[77],"control":[79,176],"21":[82],"subjects,":[84],"having":[85],"normal":[87],"occlusion":[88,233],"13.0":[94,111],"years.":[95],"participants":[97],"documented":[99],"with":[100,238,245],"dental":[101],"casts":[102],"cephalograms":[104],"ages":[107,122],"11.4":[109],"for":[113,242],"two":[115],"groups":[116],"respectively":[117],"(T1),":[118],"30.9":[124],"years":[125,129],"(T2)":[126],"61.7":[128],"(T3).":[130],"Changes":[131],"incisor":[134,198,248],"described":[137],"changes":[139,151],"\"irregularity\"":[141],"\"space":[143],"deficiency.\"":[144],"RESULTS:":[145],"showed":[149],"no":[150],"irregularity":[154,179],"significant":[160],"improvement":[161],"space":[164,185],"deficiency":[165,186],"teeth":[169,190,223],"into":[170,193,203],"adulthood.":[172,195,253],"While":[173],"group,":[177],"both":[178],"increased":[191],"significantly":[192],"CONCLUSION:":[196],"Lower":[197],"alignment":[199,249],"remains":[200],"mainly":[201],"unchanged":[202],"adulthood":[205],"have":[209],"their":[211],"childhood,":[216],"only":[219],"treatment":[220],"crowding.":[224],"CLINICAL":[225],"RELEVANCE:":[226],"Severe":[227],"can":[234],"be":[235],"solved":[236],"solely":[237],"premolar":[239],"extraction,":[240],"allowing":[241],"spontaneous":[243],"adjustments":[244],"more":[246],"stable":[247],"up":[250]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":1}],"updated_date":"2026-11-12T12:28:57.059296","created_date":"2022-02-25T00:00:00"}
