Three-dimensional assessment of condylar position and joint spaces after maxillary first premolar extraction in skeletal Class II malocclusion

2017 ◽  
Vol 20 (2) ◽  
pp. 71-78 ◽  
Author(s):  
M. S. Alhammadi ◽  
M. S. Fayed ◽  
A. Labib
Keyword(s):  
Three Dimensional ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
Skeletal Class Ii ◽  
Condylar Position ◽  
Dimensional Assessment

scholarly journals Three-dimensional study of the upper airway in different skeletal Class II malocclusion patterns

2018 ◽  
Vol 89 (1) ◽  
pp. 93-101
Author(s):  
Fernando C. Brito ◽  
Daniel P. Brunetto ◽  
Matilde C. G. Nojima
Keyword(s):  
Linear Regression Analysis ◽  
Three Dimensional ◽  
Upper Airway ◽  
Class Ii ◽  
Class I ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Intergroup Comparison ◽  
Reconstruction Software

ABSTRACT Objectives: To characterize upper airway volume and morphology in patients with different skeletal patterns of Class II malocclusion compared to Class I. Materials and Methods: A total of 197 individuals who had cone-beam computed tomography were allocated into groups according to ANB, SNA, and SNB angles (Class I, Class II maxillary protrusion, Class II mandibular retrusion), each subdivided into hypodivergent, normal, and hyperdivergent. Nasopharynx (NP), oropharynx (OP), and hypopharynx (HP) were assessed with three-dimensional image reconstruction software. Results: Intergroup comparison did not detect significant differences in volume and morphology of NP, OP, and HP. The males displayed larger OP and HP volume than the females. Positive correlations between age and NP, OP, HP volume and between craniocervical angle and OP and HP volume were observed. Linear regression analysis detected a tendency for OP and HP volume to increase as maxillary and mandibular length increased. Conclusions: Upper airway volume and morphology were similar in different skeletal patterns of Class II malocclusion. Actual upper and lower jaw lengths were more closely related to upper airway volume and morphology than the angles that reflected their position relative to the cranial base.

scholarly journals Correlation Analysis between Three-Dimensional Changes in Pharyngeal Airway Space and Skeletal Changes in Patients with Skeletal Class II Malocclusion following Orthognathic Surgery

2022 ◽  
Vol 2022 ◽  
pp. 1-15
Author(s):  
Moonhwan Kim ◽  
Chung-Ju Hwang ◽  
Jung-Yul Cha ◽  
Sang-Hwy Lee ◽  
Young Joon Kim ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Three Dimensional ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Sectional Area ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Skeletal Changes ◽  
Skeletal Class Ii ◽  
Anterior Posterior

Introduction. Studies on the pharyngeal airway space (PAS) changes using three-dimensional computed tomography (CT) have shed more light on patients with Class III than Class II malocclusion. This paper focuses on analyzing the long-term changes in the PAS and evaluating the postoperative association between these PAS and skeletal changes in patients with skeletal Class II malocclusion who have undergone orthognathic surgery. Methods. The records of 21 patients with skeletal Class II malocclusion who had undergone orthognathic surgery were included. The anatomical modifications in both jaws, changes in volume, sectional area (SA), minimum sectional area (MSA), and anterior-posterior (AP) and transverse (TV) width in the airway at one month before surgery ( T 0 ), and one month ( T 1 ) and one year ( T 2 ) after surgery were analyzed using CT images. The association between the skeletal and airway changes was evaluated between T 0 , T 1 , and T 2 . Results. After surgery, the ANS, A point, and PNS demonstrated significant posterior and superior movement. The B point and the pogonion exhibited substantial anterior and superior movement. The total and inferior oropharyngeal volumes (vol 3, vol 4) notably increased, while the nasopharyngeal volume (vol 1) decreased. The anterior-posterior movement at the ANS and PNS after surgery was significantly associated with the total volume, vol 2, vol 3, SA 1, MSA, and TV width 1, while substantial association with the total volume was found at the pogonion. Conclusion. Thus, an ideal treatment plan can be formulated for patients with skeletal Class II malocclusion by considering the postoperative PAS changes.

The Effect Of Facial Vertical Dimension Changes On The Value Of Facial Harmony In Malocclusion Class II Skeletal In RSGM USU

2020 ◽  
Vol 23 (2) ◽  
pp. 39-44
Author(s):  
Muslim Yusuf ◽  
Siti Bahirrah ◽  
Bernadetta Sembiring
Keyword(s):  
Soft Tissues ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
Skeletal Class Ii ◽  
Significant Difference ◽  
The Face ◽  
Facial Harmony ◽  
Significant Change

Treatment of Class II malocclusion have impact in relation to the vertical dimensions of the skeletal and facial soft tissues mainly to the facial balancing and proportion which relate to patient facial harmony. The aim of this study was to determine the changes and differences in facial vertical dimensions to the total value of facial harmony in skeletal Class II after treatment with extraction and non-extraction of the maxillary first premolar based on Arnett and Bergmann at the Orthodontic Specialist Clinic of RSGM, Universitas Sumatera Utara. The sample consisted of initial and final cephalometry of 36 patients with age 18-35 years old, skeletal Class II malocclusion ANB > 4o, divided into extraction of maxillary first premolar and non-extraction group. Cephalometric tracing with the required points, then the photos are processed into image J software. Then the data that obtained is tested statistically with Pearson’s Correlation Test and T-Test Independent. There was a significant change between MP-SN and Pog-Imd (P=0,036) in the first premolar extraction group, but there was not a significant change in the non-extraction first premolar group. There was a significant difference in the face harmony value at point G-A between the extraction and non-extraction groups (P=0,038). There was a significant difference on the face harmony value in the treatment of malocclusion Class II orthodontic with maxillary first premolar extraction. 

scholarly journals Comparative cone-beam computed tomography evaluation of temporomandibular joint position and morphology in female patients with skeletal class II malocclusion

2019 ◽  
Vol 48 (2) ◽  
pp. 030006051989238
Author(s):  
Min Lin ◽  
Yifei Xu ◽  
Hao Wu ◽  
Haixia Zhang ◽  
Shuang Wang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Temporomandibular Joint ◽  
Cone Beam Computed Tomography ◽  
Class Ii ◽  
Cone Beam ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Female Patients ◽  
Skeletal Class Ii ◽  
Condylar Position

Objective This study was performed to evaluate the position and morphology of the temporomandibular joint in female patients with skeletal class II malocclusion and to investigate the association between temporomandibular joint disorders and facial types using cone-beam computed tomography. Methods A lateral cephalogram was taken to determine the skeletal class of each participant. Sixty female patients aged 16 to 28 years were divided into high-angle, low-angle, and control groups. The shape of the condyle–fossa was measured and assessed on cone-beam computed tomography images of the 120 temporomandibular joints. Results Some condylar shape measurements displayed statistically significant differences among the groups. No significant differences were found in the length of the condyle, width of the glenoid fossa, or height of the articular eminence among the three groups. The posterior condylar position was more frequently observed in the low-angle group, whereas the anterior condylar position was more prevalent in the high-angle group. Conclusion The present study revealed differences in the condyle–fossa morphology and position in female patients with skeletal class II malocclusion with different vertical facial types.

scholarly journals Combination of forsus fatigue resistant device and premolar extraction for the management of a skeletal class II malocclusion

2021 ◽  
Vol 7 (3) ◽  
pp. 251-254
Author(s):  
Rithika Joseph ◽  
Nausheer Ahmed ◽  
Aravinda V N
Keyword(s):  
Case Report ◽  
Treatment Planning ◽  
Class Ii ◽  
Accurate Diagnosis ◽  
Class Ii Malocclusion ◽  
Successful Management ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
Skeletal Class Ii ◽  
Forsus Fatigue Resistant Device

Treatment of class II malocclusion requires accurate diagnosis and treatment planning. This case report outlines the successful management of a growing skeletal class II using Forsus fatigue resistant device for correction of skeletal parameters and premolar extractions for correction of dental parameters. The patient’s profile improved significantly with a 4° reduction in ANB angle. An ideal overjet, overbite and molar relation were also attained.

scholarly journals Penggunaan trans palatal arch untuk mengatasi penjangkaran pada kasus maloklusi kelas II skeletal disertai crowding yang parahThe use of trans palatal arch as anchorage control for skeletal class II malocclusion with severe crowding

2020 ◽  
Vol 32 (2) ◽  
pp. 119
Author(s):  
Jenny Augusta Arnis ◽  
Haru Setyo Anggani
Keyword(s):  
Case Report ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
Skeletal Class Ii ◽  
Dental Hospital ◽  
Dental Crowding ◽  
Proper Consideration

Pendahuluan: Maloklusi kelas II skeletal disertai crowding yang parah dapat menambah kompleksitas perawatan ortodontik. Umumnya dibutuhkan pencabutan gigi premolar sehingga dibutuhkan upaya untuk mempertahankan ruangan yang telah diperoleh karena kebutuhan ruangan yang cukup besar. Tujuan penulisan laporan kasus ini adalah menjelaskan perawatan ortodontik kasus maloklusi kelas II skeletal disertai crowding yang parah dengan penjangkaran trans palatal arch (TPA). Laporan kasus: Pasien laki-laki 34 tahun datang ke klinik Ortodonti RSGM FKG UI dengan keluhan gigi berjejal. Hasil diagnosis memperlihatkan adanya maloklusi kelas II skeletal disertai dengan crowding yang parah pada lengkung gigi atas dan bawah, serta profil muka cembung. Kasus ini dirawat dengan pencabutan gigi premolar pertama di rahang atas maupun bawah di kedua sisi menggunakan peranti ortodontik cekat sistem breket pre-adjusted edgewise MBT, dan ditambahkan TPA di rahang atas. Hasil perawatan menunjukkan crowding pada lengkung gigi atas dan bawah terkoreksi setelah 20 bulan perawatan. Simpulan: Penatalaksanaan maloklusi kelas II yang kompleks memerlukan pertimbangan dan perencanaan yang seksama terutama dalam hal penjangkaran. Perawatan ortodontik konvensional menggunakan penjangkaran tambahan berupa TPA terbukti efektif dalam mengoreksi crowding yang parah, mengubah hubungan molar dan kaninus menjadi kelas I, serta memperoleh oklusi yang baik secara merata di regio atas dan bawah di kedua sisi.Kata kunci: Trans palatal arch, crowding, maloklusi kelas II skeletal. ABSTRACTIntroduction: Skeletal class II malocclusion with severe crowding may contribute to the complexity level of orthodontic treatment. During the treatment with premolar extraction, space created needs to be maintained due to the more substantial space requirement. The purpose of this case report was to determine the orthodontic treatment of class II malocclusion with severe crowding using a trans palatal arch (TPA) to reinforce the anchorage. Case report: A 34-year man came to Orthodontic Clinics of the Faculty of Dentistry University of Indonesia Dental Hospital with a chief complaint of dental crowding. Diagnosis result showed the skeletal class II malocclusion along with severe maxillary and mandibular crowding and a convex face profile. Treatment with four first premolar extraction was performed with a pre-adjusted edgewise MBT system with TPA in the upper arch. The treatment results showed that severe crowding was corrected after 20 months of treatment. Conclusion: Due to the complexity of class II malocclusion, arrangement and implementation of this case need proper consideration and strategic planning, especially regarding anchorage control. Conventional orthodontic treatment using TPA is proven to be effective to eliminate severe crowding, obtain bilateral class I canine and molar relationship, and to achieve a right balance and occlusal function in the upper and lower regions of both sides.Keywords: Trans palatal arch, dental crowding, skeletal class II malocclusion.

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