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 - 20/08/20
, Silvio Augusto Bellini-Pereira , Aron Aliaga-Del-Castillo , Mayara Paim Patel , Marcos Roberto de Freitas , José Fernando Castanha Henriques , Guilherme Janson Bienvenue sur EM-consulte, la référence des professionnels de santé.
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Summary |
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.
Le texte complet de cet article est disponible en PDF.Keywords : Malocclusion, Angle Class II, Extraoral Traction Appliances, Orthodontics, Corrective, Cephalometry
Plan
Vol 18 - N° 3
P. 424-435 - septembre 2020 Retour au numéro
Article précédent
- Comparison of rate of orthodontic tooth movement in adolescent patients undergoing treatment by first bicuspid extraction and en-mass retraction, associated with low level laser therapy in passive self-ligating and conventional brackets: A randomized controlled trial
- Hmar Lalnunpuii, Puneet Batra, Karan Sharma, Amit Srivastava, Sreevatsan Raghavan
- Teeth angulations after class II treatment with the Jones Jig followed by fixed appliances: A retrospective panoramic analysis
- Silvio Augusto Bellini-Pereira, Gabriel Querobim Sant’Anna, Maria Claudia Wagner, Aron Aliaga-DelCastillo, Mayara Paim Patel, José Fernando Castanha Henriques, Guilherme Janson
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