Influence of conventional and skeletal anchorage system supported fixed functional appliance on maxillo-mandibular complex and temporomandibular joint: A preliminary comparative cone beam computed tomography study.

Autor: Gandedkar NH; Cleft and Craniofacial Centre and Dental Service, KK Women's and Children's Hospital, 100, Bukit Timah road, 229899 Singapore. Electronic address: gandedkar.naru@gmail.com., Shrikantaiah S; Department of Orthodontics and Dentofacial Orthopaedics, SDM College of Dental Sciences and Hospital, Dharwad, Karantaka, India., Patil AK; Department of Orthodontics and Dentofacial Orthopaedics, SDM College of Dental Sciences and Hospital, Dharwad, Karantaka, India., Baseer MA; Department of Preventive Dentistry, Division of Community Dentistry, Annamuthjiya Campus, Riyadh Colleges of Dentistry and Pharmacy, 11681 Riyadh, Saudi Arabia., Chng CK; Cleft and Craniofacial Centre and Dental Service, KK Women's and Children's Hospital, 100, Bukit Timah road, 229899 Singapore., Ganeshkar SV; Department of Orthodontics and Dentofacial Orthopaedics, P.M.N.M Dental College and Hospital, Bagalkot, Karnataka, India., Kambalyal P; Department of Orthodontics and Dentofacial Orthopaedics, Darshan Dental College and Hospital, Udaipur, Rajasthan, India.
Jazyk: angličtina
Zdroj: International orthodontics [Int Orthod] 2019 Jun; Vol. 17 (2), pp. 256-268. Date of Electronic Publication: 2019 Apr 22.
DOI: 10.1016/j.ortho.2019.03.008
Abstrakt: Aim: Fixed functional appliance (FFA) used in the treatment of Class II malocclusion, lead to mandibular anterior teeth proclination, thus limiting the skeletal effects of the appliance. To counter this side effect, FFA is anchored in the lower anterior region of the mandible using the skeletal anchorage system. This pilot study was done to evaluate treatment and one-year post-treatment maxillo-mandibular, and temporomandibular joint (TMJ) effects of conventional fixed functional appliance (FFA) and skeletal anchorage system supported fixed functional appliance (SAS-FFA) using cone beam computed tomography (CBCT) images.
Material and Method: Sixteen Class II individuals were equally divided into Group I (FFA) (mean age 13.11±0.38 years) and Group II (SAS-FFA) (mean age 12.96±0.38 years). CBCT scans taken, before treatment (T0), at the end of comprehensive treatment (T1), and after one-year post-treatment (T2), were evaluated for changes in maxillo-mandibular complex and TMJ. Intraclass correlation coefficient and independent "t" test were used for repeated measures, and inter-group (mean) changes respectively.
Results: After one-year post-comprehensive treatment, SAS-FFA showed significant maxillary restriction (SNA, -1.93°, P<0.05) with significant increase in mandibular length (Go-Pog, 3.25mm, P<0.001) (Co-Gn, 7.87mm, P<0.001). SAS-FFA groups showed significant upward and backward increase in condylar volume (571 mm 3 , P<0.001) with anterior translation of glenoid fossa. FFA group showed significant lower dentition and vertical relationship relapse, along with non-significant changes at TMJ.
Conclusion: SAS-FFA is an effective combination, which brings favourable changes on maxillo-mandibular complex and temporomandibular joint with non-significant relapse in comparison to FFA at one-year post-treatment.
(Copyright © 2019. Published by Elsevier Masson SAS.)
Databáze: MEDLINE
Externí odkaz: