Mandibular Prognathism and Anterior Open Bite: Treatment by Orthodontic Molar Intrusion and Two-jaw Surgery

2006 ◽  
Vol 18 (4) ◽  
pp. 296-302
Author(s):  
Hiromi Yoshitake ◽  
Eri Oki ◽  
Kazuhiro Ichikawa ◽  
Takatoshi Itoh ◽  
Takami Itoh ◽  
...  
Keyword(s):  
Open Bite ◽  
Anterior Open Bite ◽  
Mandibular Prognathism ◽  
Molar Intrusion ◽  
Jaw Surgery

scholarly journals Optimization of Loading Condition for Maxillary Molar Intrusion with Midpalatal Miniscrews by Using Finite Element Analysis

2021 ◽  
Vol 11 (24) ◽  
pp. 11749
Author(s):  
Ornnicha Pooktuantong ◽  
Takeshi Ogasawara ◽  
Masayoshi Uezono ◽  
Pintu-on Chantarawaratit ◽  
Keiji Moriyama
Keyword(s):  
Finite Element ◽  
Open Bite ◽  
Unit Load ◽  
Anterior Open Bite ◽  
Element Analysis ◽  
Molar Intrusion ◽  
Apical Direction ◽  
Root Injury ◽  
Maxillary Molar ◽  
Transpalatal Arch

An anterior open bite is one of the most difficult malocclusions in orthodontic treatment. For such malocclusion, orthodontic miniscrew insertion into both buccal and palatal alveolar regions has been indicated for molar intrusion, but it involves a risk of tooth root injury. To solve the problem, a midpalatal miniscrew-attached extension arm (MMEA) is adopted. However, this method causes palatal tipping of the molar because intrusive loads were applied only from the palatal side. Currently, a transpalatal arch is added to avoi0d tipping movement, but it induces the patient’s discomfort. Hence, the objective of this study was to evaluate the loading conditions for maxillary molar intrusion without tipping movement, only by MMEA through finite element (FE) analysis. FE models of maxillary right first molar and surrounding tissues were created. Three hook positions of MMEA were set at 6.0 mm perpendicular intervals in the occluso-apical direction along the mucosal contour. An intrusive unit load was applied from the palatal side of the molar, and various counter loads were applied from the buccal side. An optimal counter load for molar intrusion without palatal tipping was observed in each hook position. In conclusion, an ideal maxillary molar intrusion can be achieved only by MMEA with an optimal counter load.

scholarly journals A case of severe open bite malocclusion with crowding and short roots treated by two-jaw surgery including four-piece LeFort I osteotomy

2021 ◽  
Author(s):  
Mitsuhiro Hoshijima ◽  
Naoki Oka ◽  
Tatsushi Matsumura ◽  
Seiji Iida ◽  
Hiroshi Kamioka
Keyword(s):  
Orthodontic Treatment ◽  
Operative Procedure ◽  
Open Bite ◽  
Mandibular Advancement ◽  
Anterior Open Bite ◽  
Skeletal Deformity ◽  
Sagittal Split Ramus Osteotomy ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Jaw Surgery

Abstract BackgroundAppropriate operations in severe anterior open bite (AOB) cases are extremely complicated to perform because of the multiple surgical procedures involved, difficulty of predicting posttreatment aesthetics and high relapse rate.Case reportWe herein report a 16-year-old girl with skeletal Class II, severe AOB malocclusion and crowding with short roots and aesthetic and functional problems. Four-piece segmental LeFort I osteotomy combined with a posterior horseshoe-like osteotomy was performed for maxillary intrusion, and sagittal split ramus osteotomy (SSRO) and genioplasty were performed for mandibular advancement. The malocclusion and skeletal deformity were significantly improved by the surgical orthodontic treatment. Functional and aesthetic occlusion with an improved facial profile was established, and no further root shortening was observed. Acceptable occlusion and dentition were maintained after a two-year retention period.ConclusionThis strategy of surgical orthodontic treatment with a complicated operative procedure might be effective for managing severe AOB malocclusion.

scholarly journals Change of the upper airway after mandibular setback surgery in patients with mandibular prognathism and anterior open bite

2019 ◽  
Vol 41 (1) ◽  
Author(s):  
Kyungjin Lee ◽  
Soon Jung Hwang
Keyword(s):  
Hyoid Bone ◽  
Vertical Displacement ◽  
Cross Sectional Area ◽  
Open Bite ◽  
Sectional Area ◽  
Anterior Open Bite ◽  
Cross Sectional ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Significant Difference

Abstract Purpose It has been reported before that the amount of pharyngeal airway space (PAS) significantly decreases following mandibular setback (MS) surgery in patients with mandibular prognathism (MP). Further, MP patients with an anterior open-bite (AOB) presentation may show a larger decrease in PAS compared with those without AOB. However, studies on postoperative PAS changes in MP patients with AOB remain rare. This study sought to evaluate changes in PAS and hyoid bone positioning following MS surgery in MP patients with and without AOB. Patients and methods Twenty patients who underwent two jaw surgery involving MS movement were included. Patients were divided into a non-AOB group (n = 10; overbite > 2 mm) and an AOB group (n = 10; overbite < − 4 mm). Three-dimensional changes in PAS and hyoid bone positioning were compared and statistically evaluated pre- and postoperatively using computed tomography (CT). Results The mean magnitude of MS was 6.0 ± 2.8 mm and 5.6 ± 3.2 mm in the non-AOB group and AOB group, respectively. The oropharyngeal volume and upper hypopharyngeal volume were significantly reduced after surgery in both the groups (p = 0.006 and p = 0.003), while the retroglossal cross-sectional area was significantly reduced only in the AOB group (p = 0.028). Although the AOB group showed a larger decrease in PAS, the difference was not statistically significant between the groups. The position of the hyoid bone showed significant posterior and inferior displacement only in the AOB group, while the vertical displacement of the hyoid bone showed a statistically significant difference between the two groups. Conclusion PAS was significantly decreased after MS in both the groups, while only the AOB group presented a statistically significant reduction in the retroglossal cross-sectional area. Vertical displacement of the hyoid bone showed a statistically significant difference between the groups, while the PAS change was not. Surgeons should be aware of potential postoperative airway problems that may arise when performing MS surgeries.

scholarly journals Treatment of adult patient with hyperdivergent retrognathic phenotype and anterior open bite: report of a case with non-surgical orthodontic approach

2020 ◽  
Vol 25 (4) ◽  
pp. 75-84
Author(s):  
Marinho Del Santo Jr
Keyword(s):  
Young Adult ◽  
Adult Patient ◽  
Orthognathic Surgery ◽  
Clinical Case ◽  
Open Bite ◽  
Therapeutic Result ◽  
Anterior Open Bite ◽  
Young Adult Patient ◽  
Molar Intrusion

ABSTRACT Adult patients with anterior open bite and hyperdivergent retrognathic phenotype demand complex treatments, as premolar extractions, molar intrusion or orthognathic surgery. In the present clinical case, a young adult patient without significant growth, with Class I and anterior open bite, was treated with four premolar extractions. The therapeutic result shows good intercuspation, good facial esthetic, good function balance, and stability in a two-year post-fixed treatment follow-up.

Molar Intrusion using TADs in the Management of an Anterior Open Bite: A Case Report

Dental Update ◽  
2021 ◽  
Vol 48 (3) ◽  
pp. 193-199
Author(s):  
Ariane Sampson ◽  
Ali Payam Sattarzadeh
Keyword(s):  
Orthodontic Treatment ◽  
Open Bite ◽  
Orthodontic Appliances ◽  
Anterior Open Bite ◽  
Temporary Anchorage Devices ◽  
Molar Intrusion ◽  
Fixed Orthodontic Appliances ◽  
Skeletal Change ◽  
Non Surgical Treatment ◽  
Risk Of Relapse

The prevalence of an anterior open bite ranges in the literature from 1.5% to 11%, with great racial variance. Stable non-surgical treatment of an anterior open bite is notoriously unpredictable, with a high risk of relapse and an uncertainty of true skeletal change. Temporary anchorage devices (TADs) are increasingly used to enhance and simplify orthodontic biomechanics, enabling clinicians to push the boundaries of orthodontic treatment. In anterior open bite cases, TADs may be used predictably for molar intrusion and improvement of the overbite. We describe a 16-year-old male with a Class I incisal relationship on a skeletal I base and increased vertical proportions, complicated by a 4-mm anterior open bite secondary to a previous digit sucking habit. Treatment involved fixed orthodontic appliances on an extraction basis, and molar intrusion using TADs. TADs provide a safe and effective alternative to reducing an anterior bite in a patient whose growth is complete. CPD/Clinical Relevance: Understanding the options for the treatment of an anterior open bite and the limits of orthodontic camouflage will help clinicians provide their patients with the necessary information with which to make informed decisions.

scholarly journals Effect of molar intrusion with temporary anchorage devices in patients with anterior open bite: a systematic review

2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Ahmad Saleem Alsafadi ◽  
Mohannad M. Alabdullah ◽  
Humam Saltaji ◽  
Anas Abdo ◽  
Mohamed Youssef
Keyword(s):  
Systematic Review ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Temporary Anchorage Devices ◽  
Molar Intrusion

scholarly journals Nonsurgical treatment of skeletal anterior open bite in adult patients: Posterior build-ups

2016 ◽  
Vol 87 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Arturo Vela-Hernández ◽  
Rocio López-García ◽  
Verónica García-Sanz ◽  
Vanessa Paredes-Gallardo ◽  
Felicidad Lasagabaster-Latorre
Keyword(s):  
Open Bite ◽  
Anterior Open Bite ◽  
Retention Period ◽  
Term Stability ◽  
Long Term Stability ◽  
Skeletal Changes ◽  
Molar Intrusion ◽  
Mandibular Plane ◽  
Lateral Cephalograms

ABSTRACT Objective: To (1) evaluate the efficacy of build-ups in the correction of anterior open bite in adults, (2) evaluate their efficacy in producing molar intrusion, (3) analyze skeletal and dental changes, and (4) assess the long-term stability. Materials and Methods: The sample consisted of 93 lateral cephalograms from 31 patients with skeletal and dental anterior open bite. The patients had received orthodontic treatment consisting of bonded resin blocks on the maxillary molars combined with Tip-Edge Plus bracket appliances. Cephalometric measurements were performed on radiographs taken before treatment (T1), after treatment (T2), and after a retention period (T3), which were analyzed and compared. Results: Significant dental and skeletal changes were observed after treatment. Molar intrusion averaging 1 mm; 1.44 and 1.57 mm extrusion of mandibular and maxillary incisors, respectively; and a mean of 3.98 mm overbite increase were observed. The mandibular plane angle showed a mean closure of 1.19°, and there was a mean decrease in anterior facial height of 0.7 mm. A mild relapse tendency was observed, but long-term stability was acceptable. Conclusions: Build-ups are an effective treatment alternative for anterior open bite in adults. Outcomes remain significantly stable during the retention period.

scholarly journals Outcomes and Stability of Anterior Open Bite Treatment with Skeletal Anchorage in Non-Growing Patients and Adults Compared to the Results of Orthognathic Surgery Procedures: A Systematic Review

2021 ◽  
Vol 10 (23) ◽  
pp. 5682
Author(s):  
Piotr Malara ◽  
Susanne Bierbaum ◽  
Beata Malara
Keyword(s):  
Systematic Review ◽  
Orthognathic Surgery ◽  
Data Extraction ◽  
Open Bite ◽  
Long Term Results ◽  
Published Data ◽  
Skeletal Anchorage ◽  
Anterior Open Bite ◽  
Molar Intrusion ◽  
Molar Teeth

The objective of this review is to evaluate, on the basis of the available literature, if anterior open bite (AOB) can be successfully treated with the intrusion of molar teeth using skeletal anchorage in non-growing patients and adults and if this treatment modality provides comparable results to those obtained by orthognathic surgery procedures. Methods: A systematic review of published data in major databases from 2000 to 2021 was performed. Results: In total, 92 articles were included in title and abstract screening, and only 16 articles (11 concerning AOB correction by molar intrusion with skeletal anchorage, and five considering AOB treatment by orthognathic surgical intervention) qualified for thorough data extraction and analysis. Conclusions: On the basis of this review, it seems to be possible to obtain successful results for AOB treatment in non-growing patients and adults by means of the intrusion of molar teeth with skeletal anchorage. However, due to the different methods of assessing treatment outcomes used by different authors, it is not possible to state conclusively whether the treatment of AOB by means of molar intrusion with skeletal anchorage provides long-term results that are comparable to orthognathic surgery procedures.

Sign in / Sign up

Export Citation Format

Share Document