Title
Comparison of the dentoskeletal and soft tissue changes with the cervical headgear and Jones Jig followed by fixed appliances in Class II malocclusion patients: A retrospective study
Date Issued
01 September 2020
Access level
metadata only access
Resource Type
journal article
Author(s)
Fontes F.P.H.
Bellini-Pereira S.A.
Patel M.P.
Freitas M.R.d.
Henriques J.F.C.
Janson G.
University of São Paulo
Publisher(s)
Elsevier Masson SAS
Abstract
Objective: To retrospectively compare the dentoskeletal and soft tissue changes of patients with Class II malocclusion treated with cervical headgear and Jones Jig appliances, followed by fixed appliances. Material and methods: The sample comprised 46 Class II malocclusion patients divided into two groups. Patients with Class II malocclusion based on the ANB angle and plaster model analyses, needing non-extraction orthodontic treatment, absence of mandibular crowding and no previous orthodontic treatment were eligible to be selected. Group 1 consisted of 25 patients treated with cervical headgear (CH) followed by fixed appliances for a mean period of 3.26 years and group 2 consisted of 21 patients treated with the Jones Jig (JJ) appliance for a mean of 4.29 years. Lateral cephalograms were evaluated at the beginning and at the end of orthodontic treatment. For intergroup comparisons, t and Mann-Whitney tests were performed. Results: The cervical headgear group produced significantly greater maxillary anterior displacement restriction (SNA; CH: −0.97° ± 1.33; JJ: 0.07° ± 1.73; P = 0.025), apical base discrepancy improvement (ANB; CH: −1.52° ± 1.25; JJ: 0.36° ± 1.46; P = 0.006), FMA reduction (CH: −0.78° ± 2.68; JJ: 1.07° ± 2.84; P = 0.028) and distal mandibular molar angulation (Md6.PM; CH: 6.97° ± 3.66; JJ: 2.77° ± 6.87; P = 0.013) than the Jones Jig group. Conclusions: Both distalizers followed by fixed appliances were effective to correct Class II malocclusion. The cervical headgear group presented skeletal effects with less treatment time and there were no significant intergroup differences regarding soft tissue changes.
Start page
424
End page
435
Volume
18
Issue
3
Language
English
OCDE Knowledge area
Odontología, Cirugía oral, Medicina oral
Scopus EID
2-s2.0-85083019563
PubMed ID
Source
International Orthodontics
ISSN of the container
17617227
Sources of information: Directorio de Producción Científica Scopus