{"id":"https://openalex.org/W1985386887","doi":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","title":"Hypodontia and hyperdontia of permanent teeth in Hong Kong schoolchildren","display_name":"Hypodontia and hyperdontia of permanent teeth in Hong Kong schoolchildren","publication_year":1987,"publication_date":"1987-08-01","ids":{"openalex":"https://openalex.org/W1985386887","doi":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","mag":"1985386887","pmid":"https://pubmed.ncbi.nlm.nih.gov/3476247"},"language":"en","primary_location":{"id":"doi:10.1111/j.1600-0528.1987.tb00524.x","doi":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","is_oa":false,"landing_page_url":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","pdf_url":null,"source":{"id":"https://openalex.org/S52877392","display_name":"Community Dentistry And Oral Epidemiology","issn_l":"0301-5661","issn":["0301-5661","1600-0528"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","doyens","jufo-2","ki-jl-2","medline","norway-2","poland-100","russia-white-list-1"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Community Dentistry and Oral Epidemiology","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5008574480","display_name":"P. Jane Davis","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I2801367772","display_name":"Prince Philip Dental Hospital","ror":"https://ror.org/011p8xd65","country_code":"CN","type":"healthcare","lineage":["https://openalex.org/I2801367772"]},{"id":"https://openalex.org/I889458895","display_name":"University of Hong Kong","ror":"https://ror.org/02zhqgq86","country_code":"HK","type":"education","lineage":["https://openalex.org/I889458895"]}],"countries":["CN","HK"],"is_corresponding":true,"raw_author_name":"P. Jane Davis","raw_affiliation_strings":["Department of Children's Dentistry & Orthodontics, University of Hong Kong, The Prince Philip Dental Hospital, Hong Kong","Department of Children's Dentistry and Orthodontics, University of Hong Kong, The Prince Philip Dental Hospital, Hong Kong"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Children's Dentistry & Orthodontics, University of Hong Kong, The Prince Philip Dental Hospital, Hong Kong","institution_ids":["https://openalex.org/I2801367772","https://openalex.org/I889458895"]},{"raw_affiliation_string":"Department of Children's Dentistry and Orthodontics, University of Hong Kong, The Prince Philip Dental Hospital, Hong Kong","institution_ids":["https://openalex.org/I2801367772","https://openalex.org/I889458895"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5008574480"],"corresponding_institution_ids":["https://openalex.org/I2801367772","https://openalex.org/I889458895"],"apc_list":{"value":4230,"currency":"USD","value_usd":4230},"apc_paid":null,"fwci":1.1901,"has_fulltext":false,"cited_by_count":289,"citation_normalized_percentile":{"value":0.76076646,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":96,"max":100},"biblio":{"volume":"15","issue":"4","first_page":"218","last_page":"220"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11919","display_name":"dental development and anomalies","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T11919","display_name":"dental development and anomalies","score":1.0,"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"}},{"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"}},{"id":"https://openalex.org/T10368","display_name":"Dental Health and Care Utilization","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/tooth-agenesis","display_name":"tooth agenesis","score":0.9990000128746033},{"id":"https://openalex.org/keywords/supernumerary-teeth","display_name":"supernumerary teeth","score":0.9959999918937683},{"id":"https://openalex.org/keywords/permanent-dentition","display_name":"permanent teeth","score":0.8180000185966492},{"id":"https://openalex.org/keywords/fourth-molar","display_name":"fourth molar","score":0.8100000023841858},{"id":"https://openalex.org/keywords/mandibular-incisors","display_name":"mandibular incisors","score":0.7649999856948853},{"id":"https://openalex.org/keywords/prevalence","display_name":"prevalence","score":0.8870000243186951},{"id":"https://openalex.org/keywords/elementary-school-students","display_name":"elementary school students","score":0.8730000257492065},{"id":"https://openalex.org/keywords/hong-kong","display_name":"Hong Kong","score":0.5920000076293945},{"id":"https://openalex.org/keywords/southern-chinese","display_name":"Southern Chinese","score":0.7129999995231628}],"concepts":[{"id":"https://openalex.org/C2779385247","wikidata":"https://www.wikidata.org/wiki/Q1549421","display_name":"Hypodontia","level":2,"score":0.9364634156227112},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.9244189858436584},{"id":"https://openalex.org/C2780610479","wikidata":"https://www.wikidata.org/wiki/Q7644068","display_name":"Supernumerary","level":2,"score":0.7999017238616943},{"id":"https://openalex.org/C2780641865","wikidata":"https://www.wikidata.org/wiki/Q839483","display_name":"Premolar","level":3,"score":0.6959494352340698},{"id":"https://openalex.org/C202271784","wikidata":"https://www.wikidata.org/wiki/Q189218","display_name":"Molar","level":2,"score":0.6622243523597717},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.6499607563018799},{"id":"https://openalex.org/C2776594236","wikidata":"https://www.wikidata.org/wiki/Q1094885","display_name":"Permanent teeth","level":2,"score":0.5824759602546692},{"id":"https://openalex.org/C29694066","wikidata":"https://www.wikidata.org/wiki/Q118301","display_name":"Orthodontics","level":1,"score":0.5432360172271729},{"id":"https://openalex.org/C2779767645","wikidata":"https://www.wikidata.org/wiki/Q5281607","display_name":"Mandible (arthropod mouthpart)","level":3,"score":0.5375342965126038},{"id":"https://openalex.org/C157369684","wikidata":"https://www.wikidata.org/wiki/Q34740","display_name":"Genus","level":2,"score":0.0},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0}],"mesh":[{"descriptor_ui":"D000848","descriptor_name":"Anodontia","qualifier_ui":"Q000208","qualifier_name":"ethnology","is_major_topic":false},{"descriptor_ui":"D000848","descriptor_name":"Anodontia","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true},{"descriptor_ui":"D002648","descriptor_name":"Child","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006723","descriptor_name":"Hong Kong","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":"Q000002","qualifier_name":"abnormalities","is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D014096","descriptor_name":"Tooth, Supernumerary","qualifier_ui":"Q000208","qualifier_name":"ethnology","is_major_topic":false},{"descriptor_ui":"D014096","descriptor_name":"Tooth, Supernumerary","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true}],"locations_count":2,"locations":[{"id":"doi:10.1111/j.1600-0528.1987.tb00524.x","doi":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","is_oa":false,"landing_page_url":"https://doi.org/10.1111/j.1600-0528.1987.tb00524.x","pdf_url":null,"source":{"id":"https://openalex.org/S52877392","display_name":"Community Dentistry And Oral Epidemiology","issn_l":"0301-5661","issn":["0301-5661","1600-0528"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-c","doyens","jufo-2","ki-jl-2","medline","norway-2","poland-100","russia-white-list-1"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Community Dentistry and Oral Epidemiology","raw_type":"journal-article"},{"id":"pmid:3476247","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/3476247","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":"Community dentistry and oral epidemiology","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Good health and well-being","id":"https://metadata.un.org/sdg/3","score":0.9537000060081482}],"study_designs":[{"display_name":"Observational Study","id":"https://openalex.org/study-designs/observational-study"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320322170","display_name":"University of Hong Kong","ror":"https://ror.org/02zhqgq86"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":16,"referenced_works":["https://openalex.org/W28598359","https://openalex.org/W121759800","https://openalex.org/W1950330933","https://openalex.org/W1972239460","https://openalex.org/W1978841437","https://openalex.org/W1983205776","https://openalex.org/W1989717372","https://openalex.org/W2008268860","https://openalex.org/W2090317804","https://openalex.org/W2104727331","https://openalex.org/W2105699348","https://openalex.org/W2402031491","https://openalex.org/W2408431297","https://openalex.org/W2417052533","https://openalex.org/W2465401881","https://openalex.org/W2473205375"],"related_works":["https://openalex.org/W1855090353","https://openalex.org/W2008268860","https://openalex.org/W148703317","https://openalex.org/W2118698803","https://openalex.org/W3001028993","https://openalex.org/W2895933584","https://openalex.org/W2266550525","https://openalex.org/W2804300676","https://openalex.org/W2187905160","https://openalex.org/W7132362671"],"abstract_inverted_index":{"This":[0],"study":[1],"was":[2,34,45,63,72,114],"performed":[3],"to":[4],"determine":[5],"the":[6,59,73,79,98,128],"prevalence":[7,37],"of":[8,12,25,38,78,93,110,120],"hypodontia":[9,126],"and":[10,52,107,125],"hyperdontia":[11],"permanent":[13],"teeth":[14,41],"amongst":[15],"Southern":[16],"Chinese":[17],"children":[18,28,80,84,103],"in":[19,47,50,95,127],"Hong":[20],"Kong.":[21],"The":[22,36,67],"sample":[23],"consisted":[24],"1093":[26],"12-yr-old":[27],"on":[29],"whom":[30],"a":[31,90,111,121],"panoramic":[32],"radiograph":[33],"taken.":[35],"congenitally":[39],"missing":[40,64],"(third":[42],"molars":[43,106],"excluded)":[44],"6.1%":[46],"boys,":[48],"7.7%":[49],"girls,":[51],"6.9%":[53],"for":[54],"both":[55],"sexes":[56],"combined.":[57],"On":[58],"average,":[60],"each":[61],"child":[62],"1.5":[65],"teeth.":[66],"most":[68],"commonly":[69],"absent":[70],"tooth":[71,99,124],"mandibular":[74],"incisor,":[75],"affecting":[76],"58.7%":[77],"with":[81,89],"hypodontia.":[82],"Thirty":[83],"(2.7%)":[85],"had":[86,100,104],"supernumerary":[87,123],"teeth,":[88],"male:female":[91],"ratio":[92],"6.5:1;":[94],"four":[96],"cases":[97,119],"erupted.":[101],"Three":[102],"fourth":[105],"one":[108],"case":[109],"supplemental":[112],"premolar":[113],"recorded":[115],"(all":[116],"unerupted).":[117],"Four":[118],"maxillary":[122],"mandible":[129],"were":[130],"seen.":[131]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":6},{"year":2024,"cited_by_count":8},{"year":2023,"cited_by_count":10},{"year":2022,"cited_by_count":14},{"year":2021,"cited_by_count":12},{"year":2020,"cited_by_count":12},{"year":2019,"cited_by_count":11},{"year":2018,"cited_by_count":11},{"year":2017,"cited_by_count":14},{"year":2016,"cited_by_count":14},{"year":2015,"cited_by_count":17},{"year":2014,"cited_by_count":13},{"year":2013,"cited_by_count":15},{"year":2012,"cited_by_count":17}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}