Treatment of a Class II Division 1 malocclusion with miniscrew anchorage

This case report describes the treatment of a 30-year-old woman with a Class II Division 1 malocclusion, characterized by a large overjet, a deep overbite, and a V-shaped maxillary dental arch. She had a convex profile with a retrognathic mandible and marked lip protrusion. Treatment involved extraction of 4 first premolars and miniscrew implant anchorage for space closure. The total treatment time was about 20 months. Ideal overjet and overbite relationships were established, and the facial profile was improved substantially. The 2-year follow-up records show a morphologically and functionally stable result.     

Mini-implant anchorage for a skeletal class II malocclusion with missing mandibular incisors: a case report

This case report describes the treatment of an adult female with a severe Class II malocclusion and congenitally missing mandibular incisors. It was decided to extract the maxillary first premolars and use mini-implants for en masse retraction of the maxillary anterior teeth. More than 13 mm of maxillary incisor retraction was obtained, with little change in the mandibular incisor inclination. The patient's facial esthetics showed dramatic improvement. The upper and lower lips were retracted by 6 mm and 7 mm, respectively. This helped reduce the mentalis strain and improve chin projection. In the mandibular arch, the canines were reshaped to substitute for lateral incisors and the first premolars were used as canines. After 25 months of retention, the results have been maintained. In this report, mini-implants proved to be an effective alternative to orthognathic surgery.     

Treatment of a class 2 skeletal malocclusion with degenerative arthritis of the condyles using custom-made temporomandibular joint replacements and genioplasty

This case report presents the use of custom-made temporomandibular joint prostheses in the treatment of a class 2 malocclusion secondary to juvenile idiopathic arthritis. The patient had degeneration of the mandibular condyles with associated arthropathy and dentofacial deformity. Conventional orthognathic treatment was considered, but would not address the arthropathy. The orthognathic movements were accounted for in the design of the prosthesis and the patient’s arthralgia, functional limitations and aesthetics were addressed.     

Treatment of Class II protrusion with severe crowding using indirect miniscrew anchorage

This report describes the nonsurgical treatment of a patient with skeletal Class II protrusion and severe crowding. A 20-year-old woman presented with the chief complaint of lip protrusion and crowding. To correct the Class II relationship, severe crowding, and lip protrusion, distal movement of the maxillary first molars using indirect miniscrew anchorage and nickel-titanium coil springs, along with extraction of the first premolars and maxillary second molars, was planned. After the distal molar movement phase was complete, the maxillary first molars had moved 8.0 mm to the distal, and the first premolars, which were splinted to the miniscrews, had moved 0.5 mm to the mesial. The results show that the distal molar movement mechanics were efficient and stable. After treatment, all of the patient's chief complaints were relieved and an esthetic facial profile was obtained.     

Asymmetric severe skeletal Class II division 1 patient with temporomandibular joint disorder treated with zygomatic anchorage devices and Ni-Ti alloy wires

Objective:To describe the orthodontic treatment of a nongrowing 30-year-old woman with asymmetric severe skeletal Class II malocclusions (asymmetric Angle Class II), large overjet (16 mm), large overbite (8 mm), two congenitally missing mandibular incisors (presenting a deciduous anterior tooth), and signs and symptoms of temporomandibular joint disorder (TMD).Materials and Methods:We used novel improved super-elastic Ni-Ti alloy wires (ISWs) combined with Ni-Ti alloy coil springs, power hooks, and a zygomatic implant as reinforced anchorage to provide a constant and continuous mild force to the dentition.Results:We successfully distalized maxillary molars, premolars, and retracted anterior teeth and corrected the asymmetric Angle Class II molar relationship using this system of zygomatic anchorage in conjunction with ISWs, Ni-Ti alloy open-coil springs, and crimpable power hook. The maxillary molars were distalized, and postero-occlusal relationships were improved to achieve Class I canine and molar relationships on both sides. Intrusion of the upper molars made the mandibular plane close. Ideal overbite and overjet relationships were established. Facial esthetics were improved with decreased upper and lower lip protrusion, and no symptoms of TMD were observed after treatment.Conclusion:The orthodontic treatment described here is a promising anchorage technique alternative to traditional techniques to improve severe skeletal Class II with TMD.     

微螺钉种植体支抗压低磨牙矫治前牙开（牙合）

近些年来各种骨性支抗系统被开发并应用于临床,来完成牙齿各种类型的运动.微型种植体用于垂直支抗控制方面比传统方法有着更多的优势.本文病例通过应用自攻型微钛钉种植体支抗压低上下颌后部牙齿槽,治疗严重的骨性前牙开（牙合）畸形,证明自攻型微钛钉种植体提供垂直支抗控制的能力.本文也提示通过简单有效的骨性支抗手段,可以提供一种治疗较复杂骨性开（牙合）畸形的全新方法.     

微螺钉种植体支抗压低磨牙矫治前牙开(牙合)

近些年来各种骨性支抗系统被开发并应用于临床,来完成牙齿各种类型的运动.微型种植体用于垂直支抗控制方面比传统方法有着更多的优势.本文病例通过应用自攻型微钛钉种植体支抗压低上下颌后部牙齿槽,治疗严重的骨性前牙开(牙合)畸形,证明自攻型微钛钉种植体提供垂直支抗控制的能力.本文也提示通过简单有效的骨性支抗手段,可以提供一种治疗较复杂骨性开(牙合)畸形的全新方法.     

Treatment of occlusal plane canting using miniscrew anchorage

Two patient therapies introduce the use of miniscrew anchorage in adult patients for the correction of mild to moderate occlusal plane canting without severe facial asymmetries. A miniscrew implanted in the infrazygomatic buttress was used as anchorage for intruding the overerupted maxillary quadrant. As unilateral intrusion of maxillary posterior teeth will develop a posterior unilateral open bite, box elastics were subsequently used to extrude the opposing teeth in the mandibular arch. These treatments show that miniscrew anchorage offers a simple, efficient method of correcting occlusal plane canting and mild facial asymmetries.     

Correction of a mandibular alveolar protrusion using maxillary miniscrew anchorage in the treatment of a Class II division 1 malocclusion

This article describes a relatively simple method of reducing a mandibular alveolar protrusion without compensatory extraction of mandibular bicuspids or advancement of anterior teeth in the treatment of a Class II division 1 malocclusion. The use of well-planned skeletal anchorage specifically adapted to each specific situation is also well elucidated.     

正畸治疗骨性Ⅲ类错(牙合)对下颌平面角小的成年女性患者颞下颌关节的影响

目的：分析正畸矫治前后成年女性骨性Ⅲ类错[牙合]低角患者颞下颌关节的变化，探讨非手术正畸治疗对成年骨性Ⅲ类错[牙合]低角患者颞下颌关节的影响。方法：选取16例成年女性骨性Ⅲ类错[牙合]低角患者，18～23岁，采用OPA-K滑动直丝弓技术矫治，矫治前后拍摄双侧闭口矫正许勒位片和头颅侧位X线片，进行颞下颌关节间隙测量和头影测量分析。对矫治前后的测量数据进行配对t检验。结果：与矫治前相比，矫治后关节前间隙线距和面积分别增加0．27mm（P〈0．001）、0．70mm^2（P〈0．01），关节后间隙线距和面积分别减小0．24mm、0.67mm^2（P〈0．001）,线性百分比由22．13％减少为9．64％（P〈0．001），关节后前间隙面积之比由1．56减小为1.19（P〈0.01），关节前间隙与关节后间隙趋于相等。头影测量发现，与矫治前相比，矫治后点Co、Ar、Go及Pg相对前颅底均明显后移（P〈0.05）。结论：成年骨性Ⅲ类错[牙合]低角患者非手术矫治后髁突由下前位向后向上移至中位，关节结构趋于协调和稳定，有利于颞下颌关节紊乱病症状的缓解。     

Treatment of end stage temporomandibular joint disorder using a temporomandibular joint total prosthesis: The Slovenian experience

Purpose

The aim of this study was to analyse treatment results after alloplastic temporomandibular joint replacement surgery.

Treatment of skeletal class II division 1 malocclusion with mandibular deficiency using myofunctional appliances in growing individuals

Class II division 1 malocclusion is the most common malocclusion seen in day-to-day practice. The majority of the patients with class II division 1 malocclusions have the presence of underlying skeletal discrepancy between maxilla and mandible. The treatment of skeletal class II division 1 depends upon the age of the patient, growth potential, severity of malocclusion, and compliance of patient with treatment. Myofunctional appliance can be successfully used to treat growing patients with class II division 1 malocclusion having retrusive mandible. This article presents a discussion on treatment of class II division 1 due to mandibular deficiency with growth modification approach using myofunctional appliances and a series of three case reports of treatment of skeletal class II division 1 malocclusion using myofunctional appliance followed by fixed mechanotherapy.