Effects of Presurgical Mandibular Incisor Decompensation on Long-Term Outcomes of Class III Surgical Orthodontic Treatment

This research aimed to evaluate the effects of presurgical mandibular incisor decompensation on long-term outcomes of Class III surgical orthodontic treatment. Thirty-five patients with skeletal Class III malocclusion who received conventional surgical orthodontic treatment were included. Mandibular incisor brackets with −6° of inclination were placed normally in 18 patients (NB group) and inversely in 17 patients (RB group). Between-group differences and relationships between incisal and skeletal variables were analyzed based on lateral cephalograms at pretreatment, presurgery, postsurgery, posttreatment, and retention. Mandibular incisors were more labially inclined in the RB group than in the NB group from presurgery to retention. No significant between-group differences were observed in presurgical and postsurgical skeletal relationships. The NB group exhibited a larger overjet with deficient interincisal contact at postsurgery than the RB group. Skeletal Class III relationship was also more severe in the NB group at retention. More lingually inclined mandibular incisors at presurgery and larger overjet at postsurgery were correlated with a more severe skeletal Class III relationship at retention. Thus, establishing appropriate postsurgical overjet by sufficient presurgical mandibular incisor decompensation may play a significant role in postsurgical stability of Class III surgical orthodontic treatment.

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Periodontal consequences of mandibular incisor proclination during presurgical orthodontic treatment in Class III malocclusion patients

The Angle Orthodontist ◽

10.2319/021414-110.1 ◽

2014 ◽

Vol 85 (3) ◽

pp. 427-433 ◽

Cited By ~ 11

Author(s):

Yoon Jeong Choi ◽

Chooryung J. Chung ◽

Kyung-Ho Kim

Keyword(s):

Orthodontic Treatment ◽

Alveolar Bone ◽

Minimal Change ◽

Class Iii ◽

Mandibular Incisor ◽

Factors Affecting ◽

Crown Length ◽

Attached Gingiva ◽

Lateral Cephalograms ◽

Mandibular Incisors

ABSTRACT Objective: To test the hypothesis that periodontal changes are similar between proclined and minimal-changed mandibular incisor position groups during presurgical orthodontic treatment for Class III orthognathic surgery. Materials and Methods: The following measurements were performed before and after presurgical orthodontic treatment of 75 patients (proclination group, 39 subjects; minimal-change group, 36 subjects): clinical crown length, sulcus and bone probing depths, and width of attached gingiva from clinical examination; infradentale-to-MP (perpendicular distance of infradentale to mandibular plane) from examination of lateral cephalograms; and the distance between the cementoenamel junction and alveolar crest from examination of periapical radiographs. Data were compared between the two groups, and a regression analysis was performed to investigate factors affecting the periodontal changes. Results: In both groups, clinical crown length and bone probing depth increased during presurgical orthodontics (P < .05). Infradentale-to-MP and the width of attached gingiva decreased more in the proclination group than in the minimal-change group (P < .05). Proclination and protrusion of the mandibular incisors, and treatment duration affected the periodontal changes. Conclusions: The null hypothesis was rejected. Proclination of the mandibular incisors for decompensation in Class III surgery patients seems to result in labial alveolar bone recession and a decrease in width of attached gingiva. However, the amount of the periodontal recession appeared to be clinically insignificant.

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Long-term stability of surgical-orthodontic treatment for skeletal Class III malocclusion with mild asymmetry

Journal of Oral Science ◽

10.2334/josnusd.16-0004 ◽

2017 ◽

Vol 59 (1) ◽

pp. 161-164 ◽

Cited By ~ 3

Author(s):

Seden Akan ◽

Ilken Kocaderelı ◽

Gokhan Tuncbılek

Keyword(s):

Orthodontic Treatment ◽

Class Iii ◽

Class Iii Malocclusion ◽

Skeletal Class ◽

Term Stability ◽

Long Term Stability

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Bimaxillary Surgical Orthodontic Treatment Combined with Bimaxillary Anterior Segmental Osteotomy of Skeletal Class III Malocclusion Patient: Case Report

Clinical Journal of Korean Association of Orthodontists ◽

10.33777/cjkao.2020.10.1.55 ◽

2020 ◽

Vol 10 (1) ◽

pp. 55-67

Author(s):

Keunoh Lim ◽

Ji-Hoon Park ◽

Jung-Sub An

Keyword(s):

Case Report ◽

Orthodontic Treatment ◽

Class Iii ◽

Class Iii Malocclusion ◽

Patient Case ◽

Skeletal Class

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Skeletal Class III Malocclusion with Lateral Open Bite and Facial Asymmetry Treated with Asymmetric Lower Molar Extraction and Lingual Appliance: A Case Report

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18105381 ◽

2021 ◽

Vol 18 (10) ◽

pp. 5381

Author(s):

Vo Truong Nhu Ngoc ◽

Nguyen Thi Thu Phuong ◽

Nguyen Viet Anh

Keyword(s):

Case Report ◽

Open Bite ◽

Class Iii ◽

Class Iii Malocclusion ◽

Skeletal Class ◽

Facial Esthetics ◽

Lingual Appliance ◽

Lower Incisors ◽

Mandibular Incisors ◽

Molar Extraction

A skeletal Class III malocclusion with open bite tendency is considered very difficult to treat orthodontically without surgery. This case report describes the lingual orthodontic treatment of an adult skeletal Class III patient with mandibular deviation to the left side, lateral open bite, unilateral posterior crossbite, zero overbite and negative overjet. The lower incisors were already retroclined to compensate with the skeletal discrepancy. The patient was treated by asymmetric molar extraction in the mandibular arch to retract the lower incisors and correct the dental midline, with the help of intermaxillary elastics. Lingual appliance was used with over-torqued lower anterior teeth’s brackets to control the torque of mandibular incisors. After a 30-month treatment, satisfactory smile and facial esthetics and good occlusion was achieved. A 12-month follow-up confirmed that the outcome was stable. Asymmetric molar extraction could be a viable option to retract mandibular incisors in Class III malocclusion with lower dental midline deviation.

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Sexual dimorphism in the long-term stability (10 years) of skeletal Class III treatment

Progress in Orthodontics ◽

10.1186/s40510-021-00360-w ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Natalia Tejedor ◽

Conchita Martín ◽

José Antonio Alarcón ◽

María Dolores Oteo-Calatayud ◽

Juan Carlos Palma-Fernández

Keyword(s):

Sexual Dimorphism ◽

Class Iii ◽

Class Iii Malocclusion ◽

Skeletal Class ◽

Term Stability ◽

Long Term Stability ◽

Fixed Appliances ◽

Males And Females ◽

Class Iii Treatment

Abstract Background Class III malocclusion is associated with high sexual dimorphism, especially in individuals older than 13 years of age, with significant differences in growth between males and females during the pubertal and postpubertal stages, and in adulthood. The aim of this research was to examine differences between males and females in long-term stability (10 years) of treatment for skeletal Class III malocclusion. Methods Thirty patients (15 males and 15 females) with skeletal Class III malocclusion, who had been treated with rapid maxillary expansion (RME) combined with face mask protraction followed by fixed appliances, were selected sequentially. Thirty patients (15 males and 15 females) with skeletal Class I and mesofacial patterns treated only with fixed appliances for dental problems served as the control group. Differences between groups and sexes were evaluated using lateral cephalograms taken at the start of treatment (T0), immediately after the end of treatment (T1), and after 10 years (T2). The long-term treatment success rate was calculated. Results Ten years after Class III treatment, overjet and overbite relapse occurred similarly in females (− 0.68 ± 0.7 mm; − 0.38 ± 0.75 mm, respectively) and males (− 1.09 ± 1.47 mm; − 0.64 ± 0.9 mm, respectively); the ANB angle and Wits appraisal became significantly more negative in males (− 1.37 ± 1.06°; − 2.7 ± 2.53 mm) than in females (− 0.18 ± 1.26°; − 0.46 ± 1.94 mm). The success rate was 73.3% in males and 80% in females. Conclusions Significant differences in the long-term stability of Class III treatment outcomes have been found between males and females, with a larger skeletal Class III relapse and lower long-term success rates in males.

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Analysis of facial features and prediction of lip position in skeletal class III malocclusion adult patients undergoing surgical-orthodontic treatment

Clinical Oral Investigations ◽

10.1007/s00784-021-03830-x ◽

2021 ◽

Cited By ~ 1

Author(s):

Wenhsuan Lu ◽

Guangying Song ◽

Qiannan Sun ◽

Liying Peng ◽

Yunfan Zhang ◽

...

Keyword(s):

Orthodontic Treatment ◽

Adult Patients ◽

Facial Features ◽

Class Iii ◽

Class Iii Malocclusion ◽

Skeletal Class

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Interceptive Orthodontics with Resin Turbos for Pseudo-Class III Malocclusions

Case Reports in Dentistry ◽

10.1155/2019/1909063 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Neal D. Kravitz

Keyword(s):

Orthodontic Treatment ◽

Gingival Recession ◽

Mixed Dentition ◽

Gingival Tissue ◽

Common Finding ◽

Orthodontic Appliances ◽

Class Iii ◽

Class Iii Malocclusion ◽

Practical Implications ◽

Mandibular Incisors

Background and Overview. Lingual eruption of the permanent maxillary central incisors in the early mixed dentition can result in a traumatic anterior crossbite, causing mobility and gingival recession to the opposing mandibular incisors.Case Description. This case report presents a common finding of a 7-year-old boy with a dental crossbite and pseudo-Class III malocclusion caused by lingual eruption of the maxillary central incisors. An interceptive phase of orthodontic treatment was provided by bonding a beveled resin turbo on the mandibular incisors. The crossbite was corrected in 3 months without any orthodontic appliances. In the absence of the traumatic occlusion, the mandibular incisors stabilized and the gingival tissue was expected to regenerate.Conclusions and Practical Implications. Dentists and orthodontists can place beveled resin turbos on the mandibular incisors to jump an anterior dental crossbite conservatively, without the use of orthodontic brackets and wires.

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Comparison of skeletal anchorage and tooth-borne maxillary protraction followed by fixed appliance in Class III malocclusion

European Journal of Orthodontics ◽

10.1093/ejo/cjz086 ◽

2019 ◽

Vol 42 (2) ◽

pp. 193-199 ◽

Cited By ~ 1

Author(s):

Sang-Hoon Lee ◽

Sang-Duck Koh ◽

Dong-Hwa Chung ◽

Jin-Woo Lee ◽

Sang-Min Lee

Keyword(s):

Phase Ii ◽

Class I ◽

Skeletal Anchorage ◽

Class Iii ◽

Class Iii Malocclusion ◽

Fixed Appliance ◽

Skeletal Class ◽

Maxillary Protraction ◽

Lateral Cephalograms ◽

Residual Growth

Summary Objectives The purpose of this study was to compare the results of skeletal anchorage (SAMP) and tooth- borne (TBMP) maxillary protraction followed by fixed appliance in growing skeletal Class III patients. Materials and methods Patients treated with maxillary protraction were selected and classified into two groups (SAMP: n = 19, mean age = 11.19 years; TBMP: n = 27, mean age = 11.21 years). Lateral cephalograms taken before treatment (T0), after the maxillary protraction (T1), and after the fixed appliance treatment (T2) were analysed and all variables were statistically tested to find difference between the two groups. Results Compared to the TBMP, the SAMP showed significant forward growth of maxilla (Co-A point and SN-Orbitale) and improvement in intermaxillary relationship (ANB, AB to mandible plane, and APDI) after the overall treatment (T0–T2), with no significant sagittal changes in maxilla or mandible throughout the fixed appliance treatment (T1–T2). Limitations In maxillary protraction, effects of skeletal anchorage were retrospectively compared with those of dental anchorage, not with Class I or III control. Conclusions and implications After maxillary protraction, skeletal and tooth-borne anchorage did not cause significant differences in the residual growth of maxilla throughout the phase II treatment. Orthopaedic effects with skeletal anchorage showed appropriate stability in maxilla and intermaxillary relationship even after fixed appliance treatment.

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