Class III Malocclusion: Surgery or Orthodontics?

1992 ◽  
Vol 19 (1) ◽  
pp. 21-24 ◽  
Author(s):  
W. J. S. Kerr ◽  
S. Miller ◽  
J. E. Dawber
Keyword(s):  
Orthognathic Surgery ◽  
The Other ◽  
Threshold Values ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Lower Incisor ◽  
Lateral Cephalograms ◽  
Pre Treatment ◽  
Incisor Inclination

The pre-treatment lateral cephalograms of two groups of 20 subjects with severe Class III malocclusions were compared. One group had been considered suitable for orthodontic correction by the diagnosing clinician and the other offered orthognathic surgery. The most significant differences between the groups were in angle ANB, M/M ratio (P < 0·001), lower incisor inclination and Holdaway angle (P < 0·01). Threshold values for angle ANB and lower incisor angulation below which surgery was almost always carried out were—4 and 83 degrees, respectively.

scholarly journals Tandem Traction Bow Appliance for the Treatment of Skeletal Class III Malocclusion

2018 ◽  
Vol 08 (01) ◽  
pp. 27-34
Author(s):  
Shetty Prajwal K. ◽  
Priyanka S Udeshi ◽  
Kuttappa M. N. ◽  
Nanda kishore P. ◽  
Ravi M. S. ◽  
...  
Keyword(s):  
Treatment Modalities ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Active Growth ◽  
Lower Incisor ◽  
Skeletal Class ◽  
Lateral Cephalograms ◽  
Incisor Retraction ◽  
Maxillary Deficiency

AbstractBackground and Objectives: Skeletal class III is a growth related discrepancy which continues and becomes more severe until active growth is completed. Approximately three percent of Indian population exhibits class III malocclusion. This can be due to a mid face deficiency, a large mandible or their combination. Various treatment modalities are available for correction of class III malocclusion in growing children, one of which is the Tandem Traction Bow Appliance (TTBA). This study was planned and designed to evaluate the dental and skeletal effects of TTBA used for the correction of skeletal Class III malocclusion with maxillary deficiency. Materials and Methods: An in-vivo study designed to study the effects of TTBA on class III malocclusion with maxillary deficiency. The study was carried out on ten patients (age 6-12 years). Pre and post lateral cephalograms were traced and analyzed. Paired t test was used to compare values. Result: The significant changes seen in the dental and skeletal parameters were upper and lower incisor retraction, Increase in ANB angulations and forward and downward movement of the maxillary arch. Conclusion: TTBA is effective in early treatment of Skeletal Class III malocclusion. Being intraoral, patient compliance is improved, thus making TTBA easier to use, both for the clinician as well as for the patient.

scholarly journals Comparison of Profile Attractiveness between Class III Orthodontic Camouflage and Predictive Tracing of Orthognathic Surgery

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Mohamad Nagi Bou Wadi ◽  
Karina Maria Salvatore Freitas ◽  
Daniel Salvatore Freitas ◽  
Rodrigo Hermont Cançado ◽  
Renata Cristina Gobbi de Oliveira ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Growth Patterns ◽  
Sample Population ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Subjective Analysis ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
The Mean

Objective. The aim of this study was to compare the profile attractiveness between orthodontic camouflage of the Class III malocclusion and the predictive tracing simulating orthognathic surgery evaluated by dentists and laypeople. Settings and sample population. The sample consisted of 21 patients (9 male; 12 female) with Class III malocclusion treated with orthodontic camouflage and Class III intermaxillary elastics. Material and Methods. The mean initial age of the patients was 24.38 years (SD 3.32), and the mean ANB angle was −1.91° (SD 0.83°). Patients presented skeletal Class III and normal growth patterns. Initial and final lateral cephalograms of each patient were used. The initial cephalogram was used to perform the treatment simulation of orthognathic surgery, and its silhouette was compared to the silhouette obtained from the final cephalogram after Class III orthodontic camouflage. A subjective analysis of profile attractiveness was performed by 47 laypeople and 60 dentists, with scores from 1 (less attractive) to 10 (most attractive). Mann–Whitney tests were used to compare profile attractiveness between the orthodontic treatment and the predictive tracing groups and between dentists and laypeople. Results. The predictive tracing of orthognathic surgery showed to be statistically significantly more attractive (mean score 4.57, SD 2.47) than that of the Class III camouflage orthodontic treatment (mean score 4.22, SD 2.40), with a mean numerical but significant difference of 0.35 (SD 2.01) (P<0.001). Laypeople were more critical than dentists in evaluating profile attractiveness, but numerical difference between the groups was also small. Conclusion. The profile silhouette of predictive tracing simulating orthognathic surgery showed to be more attractive than that of Class III camouflage orthodontic treatment; however, differences were small but statistically significant. Laypeople showed to be more critical than dentists.

scholarly journals Lower incisor changes following non-extraction orthodontic decompensation in Class III surgical cases

2021 ◽  
Vol 28 ◽  
pp. 15-22
Author(s):  
Nor Nadia Zakaria ◽  
Yasmin Kamarudin ◽  
Kah Shin Ong ◽  
Zi Qing Koo
Keyword(s):  
Strong Predictor ◽  
Linear Regression Analysis ◽  
P Value ◽  
Class Iii ◽  
Weak Correlation ◽  
Lower Incisor ◽  
Lateral Cephalograms ◽  
Pre Treatment ◽  
Moderate Positive Correlation ◽  
Lower Incisors

The amount of incisor decompensation during pre-surgical orthodontics may affect the outcome of Class III orthognathic cases. The purpose of this study was to assess the lower incisor changes post-orthodontic decompensation in Class III surgical cases and to investigate the amount of crowding as a predictive factor. This was a retrospective study reporting on 22 Class III orthognathic cases. The lower incisor angulation (LIA) and distance of the lower incisor edge to the A-Pogonion line (Li-APo) were measured on pre-treatment and pre-surgical lateral cephalograms whereas crowding was measured on digitised pre-treatment study models. Pearson’s correlation (p <0.05) was used to assess the correlation of crowding with LIA and Li-APo changes, and prediction of the lower incisor decompensation was conducted using linear regression analysis. Results showed lower incisors were retroclined at 79.84° ± 7.08° and positioned ahead of APo line by 6.52 mm ± 2.97 mm at the start of treatment. Pre-surgical LIA and Li-APo were found to increase following orthodontic decompensation to 90.43° ± 5.96° and 10.34 mm ± 3.25 mm, respectively. There was a moderate positive correlation (r = 0.592) between crowding and Li-APo changes which was statistically significant, p value = 0.004, and had a strong predictor with 31.8% predictability. However, LIA showed a weak correlation (r = 0.329) with crowding and was not statistically significant (p = 0.135). Li-APo changes during orthodontic decompensation can be predicted with 31.8% predictability using the formula; Li-APo change = 2.064 + 0.503 (crowding).

scholarly journals Orthodontic camouflage of skeletal Class III malocclusion with miniplate: a case report

2016 ◽  
Vol 21 (4) ◽  
pp. 89-98 ◽  
Author(s):  
Marcel Marchiori Farret ◽  
Milton M. Benitez Farret ◽  
Alessandro Marchiori Farret
Keyword(s):  
Orthognathic Surgery ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Lower Lip ◽  
Facial Profile ◽  
Skeletal Class ◽  
Mandibular Teeth ◽  
One Year ◽  
Angle Class Iii Malocclusion

ABSTRACT Introduction: Skeletal Class III malocclusion is often referred for orthodontic treatment combined with orthognathic surgery. However, with the aid of miniplates, some moderate discrepancies become feasible to be treated without surgery. Objective: To report the case of a 24-year-old man with severe skeletal Angle Class III malocclusion with anterior crossbite and a consequent concave facial profile. Methods: The patient refused to undergo orthognathic surgery; therefore, orthodontic camouflage treatment with the aid of miniplates placed on the mandibular arch was proposed. Results: After 18 months of treatment, a Class I molar and canine relationship was achieved, while anterior crossbite was corrected by retraction of mandibular teeth. The consequent decrease in lower lip fullness and increased exposure of maxillary incisors at smiling resulted in a remarkable improvement of patient's facial profile, in addition to an esthetically pleasing smile, respectively. One year later, follow-up revealed good stability of results.

scholarly journals Stability of bimaxillary surgery on Class III malocclusion treatment

2012 ◽  
Vol 17 (6) ◽  
pp. 41-51 ◽  
Author(s):  
Fernando Antonio Gonçalves ◽  
Vânia Célia Vieira de Siqueira
Keyword(s):  
Muscle Adaptation ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Mandibular Setback ◽  
Skeletal Malocclusion ◽  
Lateral Cephalograms ◽  
Maxillary Surgery ◽  
Bimaxillary Surgery ◽  
Student’S T ◽  
The Stability

OBJECTIVE: To evaluate the stability of bimaxillary surgery in patients with skeletal malocclusion, with the use of rigid internal fixation. METHODS: Lateral cephalograms from 20 patients, 11 males and 9 females, mean age of 26 years and 1 month, were evaluated before surgery, immediately post-operative and at least 6 months after surgery. Nineteen cephalometric measurements were evaluated, and the results were statistically analyzed by means of the Student's t test and the Kruskal-Wallis test. RESULTS: The Le Fort I maxillary advancement surgery showed almost no relapse. There was lack of stability of mandibular setback, with relapse of 37.33% on point B, due to counterclockwise rotation of the mandible between post-operative periods, occurred by better intercuspation after surgery and muscle adaptation. The results showed the same tendencies for both genders. CONCLUSION: It was concluded that on the bimaxillary surgery treatment of Class III malocclusion, the maxillary surgery was very stable, but the mandibular setback recurred. No statistical differences were found in surgical stability between genders.

Sign in / Sign up

Export Citation Format

Share Document