The Effect of a Condylar Repositioning Plate on Condylar Position and Relapse in Two-Jaw Surgery

Background and objectives: The need to evaluate the condylar remodeling after orthognathic surgery, using three-dimensional (3D) images and volume rendering techniques in skeletal Class III patients has been emphasized. The study examined condylar positional, structural, and volumetric changes after bimaxillary or single-jaw maxillary orthognathic surgeries in skeletal Class III patients using the cone-beam computed tomography. Materials and Methods: Presurgical, postsurgical, and one-year post-surgical full field of view (FOV) cone-beam computed tomography (CBCT) images of 44 patients with skeletal Class III deformities were obtained. Group 1 underwent a bimaxillary surgery (28 patients: 24 females and 4 males), with mean age at the time of surgery being 23.8 ± 6.0 years, and Group 2 underwent maxillary single-jaw surgery (16 patients: 8 females and 8 males), with mean age at the time of surgery being 23.7 ± 5.1 years. After the orthognathic surgery, the CBCT images of 88 condyles were evaluated to assess their displacement and radiological signs of bone degeneration. Three-dimensional (3D) condylar models were constructed and superimposed pre- and postoperatively to compare changes in condylar volume. Results: Condylar position was found to be immediately altered after surgery in the maxillary single-jaw surgery group, but at the one-year follow-up, the condyles returned to their pre-surgical position. There was no significant difference in condylar position when comparing between pre-surgery and one-year follow-up in any of the study groups. Condylar rotations in the axial and coronal planes were significant in the bimaxillary surgery group. No radiological signs of condylar bone degeneration were detected one year after the surgery. Changes in condylar volume after surgery were found to be insignificant in both study groups. Conclusions: At one year after orthognathic surgery, there were no significant changes in positional, structural, or volumetric statuses of condyles.

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A STUDY OF CONDYLAR POSITION IN CENTRIC RELATION AND MAXIMAL INTERCUSPATION USING CONEBEAM TOMOGRAPHY

Journal of Medicine and Pharmacy ◽

10.34071/jmp.2019.2.14 ◽

2019 ◽

pp. 84-92

Author(s):

Anh Chi Phan ◽

Xuan Anh Ngoc Ho

Keyword(s):

Dental Students ◽

Cone Beam ◽

Test Results ◽

Reference Position ◽

Centric Relation ◽

Temporomandibular Joints ◽

Significant Difference ◽

Mandibular Fossa ◽

Condylar Position ◽

Cone Beam Tomography

Background: The condylar position discrepancy between centric relation and maximal intercuspation has been still a controversial issue. Aims: To compare the condylar position between centric relation and maximal intercuspation using cone-beam tomography in patients without temporomandibular joints disorder. Materials and methods: To assess the condylar position in centric relation and maximal intercuspation using cone-beam tomography on 40 fifth-year and sixth-year dental students of Hue University of Medicine and Pharmacy without temporomandibular joints disorder. The condylar positions are assessed following Sener classification (2009) and are compared between centric relation and maximal intercuspation using pairedsamples t-test and Mann-Whitney U-test. Results: Among 480 condye-to-fossa measurement pairs, there are 91.2% pairs having difference between two reference position but there is no significant difference. The condylar position at the superior of mandibular fossa has the greatest percentage in both centric relation and maximal intercuspation (43.8% in centric relation and 51.2% in maximal intercuspation). This greatest percentage is followed by the condylar position at posterior of mandibular fossa (32.5% in centric relation and 36.3% in maximal intercuspation). Lastly, the condylar position at the anterior of mandibular fossa has the fewest percentage (23.7% in centric relation and 12.5% in maximal intercuspation). Conclusion: There is no significant difference of condylar position between centric relation and maximal intercuspation in patients without temporomandibular joints disorder. Key words: Condylar position, centric relation, maximal intercuspation, cone-beam tomography

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The Short-Term Effect of Active Skeletonized Sutural Distractor Appliance on Temporomandibular Joint Morphology of Class III Malocclusion Subjects

European Journal of Dentistry ◽

10.1055/s-0040-1722483 ◽

2021 ◽

Author(s):

Mohamed Zahoor Ul Huqh ◽

Rozita Hassan ◽

Roselinda Abdul Rahman ◽

Asilah Yusof ◽

Ida Bagus Narmada ◽

...

Keyword(s):

Temporomandibular Joint ◽

Term Effect ◽

Class Iii ◽

Class Iii Malocclusion ◽

Short Term ◽

Short Term Effect ◽

Condylar Position ◽

Joint Morphology ◽

The Right ◽

Condylar Volume

Abstract Objectives The purpose of this study was to evaluate the short-term effect of active skeletonized sutural distractor (ASSD) appliance on temporomandibular joint morphology of class III malocclusion subjects. Materials and Methods This was a prospective interventional study. Cone-beam computerized tomography (CBCT) images of 22 patients were taken before and after treatment by using Planmeca Promax 3D CBCT machine version 2.9.2 (Planmeca OY Helsinki, Finland). The condylar width, height, length, roof of glenoid fossa thickness, and all joint spaces were measured. The condylar position was determined based on Pullinger and Hollander formula. The condylar shape was determined as per Kinzinger et al. The condylar volume was calculated by using Mimics software (Materialize, Belgium). Statistical Analysis Data analysis was performed by using SPSS software version 24. Wilcoxon paired signed-rank test was used to compare the difference in temporomandibular joint morphology and condylar volume between pre- and post-treatment measurements. Chi-square test was used to compare the condylar position and shape. Results The superior (p = 0.000 on the right side, p = 0.005 on the left side) and posterior joint spaces (p = 0.000 on both sides) were decreased after the treatment, respectively. The condyles were rotated upward and backward, thereby increasing the anterior joint spaces (p = 0.000 on both sides) after the treatment. The condylar volume increases after treatment, but no significant differences were observed (p = 0.903 on the right side, p = 0.062 on the left side). Conclusion The significant changes were observed in joint spaces. The condyles were more anteriorly placed before treatment. Condylar position and shape alter in response to ASSD treatment. The condylar volume did not show any significant change.

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Condylar Changes in Children with Posterior Crossbite after Maxillary Expansion: Tridimensional Evaluation

Children ◽

10.3390/children8010038 ◽

2021 ◽

Vol 8 (1) ◽

pp. 38

Author(s):

Rosamaria Fastuca ◽

Helga Turiaco ◽

Fausto Assandri ◽

Piero A. Zecca ◽

Luca Levrini ◽

...

Keyword(s):

Rapid Maxillary Expansion ◽

3D Analysis ◽

Maxillary Expansion ◽

3D Slicer ◽

Palatal Expansion ◽

Posterior Crossbite ◽

Rapid Palatal Expansion ◽

Before And After ◽

Condylar Position ◽

Caucasian Patients

(1) Background: To investigate condylar position in subjects with functional posterior crossbite comparing findings before and after rapid maxillary expansion (RME) treatment through 3D analysis; (2) Methods: Thirty-two Caucasian patients (14 males, mean age 8 y 8 m ± 1 y 2 m; 18 females mean age 8 y 2 m ± 1 y 4 m) with functional posterior crossbite (FPXB) diagnosis underwent rapid palatal expansion with a Haas appliance banded on second deciduous upper molars. Patients’ underwent CBCT scans before rapid palatal expansion (T0) and after 12 months (T1). The images were processed through 3D slicer software; (3) Results: The condylar position changes between T1 and T0 among the crossbite and non-crossbite sides were not statistically significant, except for the transversal axis. At T1, the condyles moved forward (y axis) and laterally (x axis), they also moved downward (z axis) but not significantly; (4) Conclusions: Condilar position in growing patients with functional posterior crossbite did not change significantly after rapid maxillary expansion.

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Skeletal stability and condylar position related to fixation method following mandibular setback with bilateral sagittal split ramus osteotomy

Journal of Cranio-Maxillofacial Surgery ◽

10.1016/j.jcms.2014.08.008 ◽

2014 ◽

Vol 42 (8) ◽

pp. 1958-1963 ◽

Cited By ~ 20

Author(s):

Young-Chea Roh ◽

Sang-Hun Shin ◽

Seong-Sik Kim ◽

George K. Sandor ◽

Yong-Deok Kim

Keyword(s):

Fixation Method ◽

Sagittal Split Ramus Osteotomy ◽

Mandibular Setback ◽

Condylar Position ◽

Skeletal Stability

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A methodology to have a reliable condylar position during CBCT scans

CRANIO® ◽

10.1080/08869634.2017.1355609 ◽

2017 ◽

Vol 35 (5) ◽

pp. 271-273

Author(s):

Raffaele Schiavoni ◽

Rossella Contrafatto ◽

Biagio Pacella

Keyword(s):

Condylar Position

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Internal derangements of the temporomandibular joint: An assessment of condylar position in centric occlusion

Journal of Prosthetic Dentistry ◽

10.1016/0022-3913(83)90511-5 ◽

1983 ◽

Vol 49 (2) ◽

pp. 250-254 ◽

Cited By ~ 76

Author(s):

Richard W. Katzberg ◽

David A. Keith ◽

William R. Ten Eick ◽

Walter C. Guralnick

Keyword(s):

Temporomandibular Joint ◽

Condylar Position ◽

Centric Occlusion

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Efficacy of Selective Grinding Guided by an Occlusal Splint in Management of Myofascial Pain: A Prospective Clinical Trial

The Open Dentistry Journal ◽

10.2174/1874210601711010301 ◽

2017 ◽

Vol 11 (1) ◽

pp. 301-311

Author(s):

Felipe J. Fernández-González ◽

Jorge Cabero-López ◽

Aritza Brizuela ◽

Ivan Suazo ◽

Esteban Pérez-Pevida ◽

...

Keyword(s):

Temporomandibular Joint ◽

Myofascial Pain ◽

Vertical Displacement ◽

Occlusal Splint ◽

Significant Difference ◽

Before And After ◽

Skeletal Pattern ◽

Condylar Position ◽

The Stability ◽

Facial Types

Background:For patients whose centric relation (CR) has not been considered at the start and during treatment, the task of achieving an occlusal scheme that works together with the temporomandibular joint, the muscles, and the structures of the stomatognathic apparatus becomes a major concern.Objective:This study aims to describe a reproducible, predictable and to date unreported procedure of selective grinding guided by an occlusal splint and to analyze condylar position (CP) based on the skeletal pattern.Methods:A total of 72 symptomatic patients (38 females and 34 males) were classified into three groups: hyperdivergent, intermediate and hypodivergent. CP was quantified by mounted casts on a measures condyle displacement (MCD) device. Helkimo index was also performed in order to assess the severity of the temporomandibular joint (TMJ) disorders attending to clinical dysfunction, occlusal state and anamnestic dysfunction. Once the stability had been obtained, the splint was progressively reduced until the maximum intercuspation (MIC) was achieved.Results:The vertical displacement was found to be significantly different between the hyperdivergent and other two groups (p<0.01). Comparisons of MCD analysis before and after the selective grinding procedure identified a statistically significant difference in the horizontal and vertical CP (p<0.01) between the different groups whereas the Helkimo Index showed a clear improvement of TMJ disorders.Conclusion:All facial types, specially the hyperdivergent face type, showed a reduction in condylar displacement (CD) and less craniomandibular symptoms using this procedure, making it an excellent technique for clinicians.

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