Dentoskeletal and soft tissue changes after treatment of crowding with premolar extractions: a 50-year follow-up

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MARC

Al-Taai, NameerUmeå universitet,Institutionen för odontologi (author)

Dentoskeletal and soft tissue changes after treatment of crowding with premolar extractions: a 50-year follow-up

Article/chapterEnglish2023

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2022-07-06
Oxford University Press (OUP),2023

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LIBRIS-ID:oai:gup.ub.gu.se/319009
https://gup.ub.gu.se/publication/319009URI
https://doi.org/10.1093/ejo/cjac035DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-199060URI

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Language:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Background The long-term effects on dentofacial morphology of interceptive treatment with premolar extractions, in the absence of subsequent orthodontic treatment, have not been fully explored. Objective The aim was to investigate the effects of premolar extractions (without subsequent orthodontic treatment) on the dentoskeletal and soft tissue profile of patients aged between 12 and 62 years with Class I malocclusion with severe crowding, as compared to untreated controls. Materials and methods The Extraction group (N = 30 with Class I crowding malocclusion) had their first premolars removed in early adolescence without subsequent orthodontic treatment. The Control group included 30 untreated subjects with Class I normal occlusion. Cephalograms were taken at 12 (T1), 15 (T2), 30 (T3), and 62 (T4) years of age. A superimposition-based cephalometric method was used to assess the dentoskeletal and soft tissue changes. Results There were no significant differences between the Extraction and Control groups in terms of skeletal sagittal relation, incisor inclination, and protrusion, or most of the soft tissue parameters throughout the observation period. However, significant differences were observed between the groups with respect to the vertical relations in T2-T3, such that the Extraction group showed more-pronounced decreases in the ML/NSL, ML/NL, and Gonial angles and more-pronounced increases in facial heights. Conclusions and implications Treatment for subjects with Class I malocclusion with severe crowding by the extraction of four premolars, without subsequent orthodontic treatment, does not affect the long-term dentoskeletal and soft tissue profile, as compared to an untreated Control group. The degree of crowding, rather than changes in dentofacial morphology, is crucial in deciding on extraction therapy.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Odontologi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Dentistry hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Kirurgi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Surgery hsv//eng
orthodontic treatment
vertical dimension
profile changes
therapy
Dentistry
Oral Surgery & Medicine
odontologi

Added entries (persons, corporate bodies, meetings, titles ...)

Persson, MauritsUmeå universitet,Institutionen för odontologi(Swepub:umu)mape0001 (author)
Ransjö, MariaUmeå universitet,Gothenburg University,Göteborgs universitet,Institutionen för odontologi, sektion 3,Institute of Odontology, Section 3,Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden(Swepub:umu)mara0001 (author)
Levring Jäghagen, Eva,DDS, PhDUmeå universitet,Institutionen för odontologi(Swepub:umu)evalen81 (author)
Westerlund, Anna,1970Gothenburg University,Göteborgs universitet,Institutionen för odontologi, sektion 3,Institute of Odontology, Section 3,Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden(Swepub:gu)xgoraa (author)
Umeå universitetInstitutionen för odontologi (creator_code:org_t)

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In:European Journal of Orthodontics: Oxford University Press (OUP)45:1, s. 79-870141-53871460-2210

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Dentistry

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