A new look at the treatment of Class II Division 2 malocclusions

Yousefian, Joseph; Trimble, Douglas; Folkman, Gary

doi:10.1016/j.ajodo.2005.07.016

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…15 Nevertheless Pans still appear to be widely used for diagnosis of TMJ space deficiencies and bone disorders. [16][17][18] Since 1982, digital radiography has enabled the electronic storage of panoramic images for easy recall.…”

Section: Introductionmentioning

confidence: 99%

An assessment of the accuracy of a panoramic radiograph as compared with cone-beam tomography in TMJ imaging

Soni

Buch

2017

S. Afr. dent. j.

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The articular disc of the temporomandibular joint (TMJ) cannot be seen on plain x-ray examination but an accurate assessment of the space between the glenoid fossa and the head of the condyle may provide the clinician with a clue to a possible pathological problem. Measurements of the TMJ space seen on panoramic radiographs (PAN) and on cone beam computerised tomographic scans (CBCT) were carried out on films taken of of left and right TMJs of forty-six patients. On each image a vertical line was drawn digitally from the highest point of the condylar head to the glenoid fossa of the temporal bone. The lengths of the lines were recorded on Galileo software and compared using the Bland-Altman statistical test (total sample size 92 joints). Bias was achieved at mean differences of 1.03mm with a p-value of <0.001 which was statistically significant. Left and right TMJ mean values showed a 0.09 mm difference. Age was insignificant at p=0.40. The Levels of Agreement indicated workable concord between the methods although a wide range was evident.

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Section: Introductionmentioning

confidence: 99%

An assessment of the accuracy of a panoramic radiograph as compared with cone-beam tomography in TMJ imaging

Soni

Buch

2017

S. Afr. dent. j.

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“…The former is characterized by labially inclined maxillary incisors and an excessive overjet, 1 while the latter is characterized by a Class II molar relationship with retroclined maxillary incisors. 2 According to McNamara and Brudon, 3 one of the most important causes of Class II malocclusion is maxillary constriction. Relative constriction of the maxilla leads to mandibular retrusion.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional assessment of the temporomandibular joint and mandibular dimensions after early correction of the maxillary arch form in patients with Class II division 1 or division 2 malocclusion

Coşkuner

Ciğer

2015

Korean J Orthod

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ObjectiveThis study aimed to assess three-dimensional changes in the temporomandibular joint positions and mandibular dimensions after correction of dental factors restricting mandibular growth in patients with Class II division 1 or division 2 malocclusion in the pubertal growth period.MethodsThis prospective clinical study included 14 patients each with Class II division 1 (group I) and Class II division 2 (group II) malocclusions. The quad-helix was used for maxillary expansion, while utility arches were used for intrusion (group I) or protrusion and intrusion (group II) of the maxillary incisors. After approximately 2 months of treatment, an adequate maxillary arch width and acceptable maxillary incisor inclination were obtained. The patients were followed for an average of 6 months. Intraoral and extraoral photographs, plaster models, and cone-beam computed tomography (CBCT) images were obtained before and after treatment. Lateral cephalometric and temporomandibular joint measurements were made from the CBCT images.ResultsThe mandibular dimensions increased in both groups, although mandibular positional changes were also found in group II. There were no differences in the condylar position within the mandibular fossa or the condylar dimensions. The mandibular fossa depth and condylar positions were symmetrical at treatment initiation and completion.ConclusionsClass II malocclusion can be partially corrected by achieving an ideal maxillary arch form, particularly in patients with Class II division 2 malocclusion. Restrictions of the mandible in the transverse or sagittal plane do not affect the temporomandibular joint positions in these patients because of the high adaptability of this joint.

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“…[2][3][4] In cases involving Class II division 2 malocclusion, a nonextraction approach is often chosen when the patient shows a tendency toward a short face because the extraction of premolars can exacerbate a deep bite. 5 In nonextraction cases, resolution of the discrepancy is generally achieved through lateral expansion of the dentition, labial movement of the incisors, and molar distalization. However, the use of these techniques is limited by the patient's maxillofacial morphology and stability.…”

Section: Introductionmentioning

confidence: 99%

Extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and changes in stomatognathic function

Nagayama

Tomonari

Kitashima

et al. 2015

The Angle Orthodontist

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This case report describes the successful extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and a congenitally missing maxillary lateral incisor on the left side. The posterior space in the mandibular arch was small, and the mandibular second molars were impacted, with distal tipping. The discrepancies in the maxillary and mandibular arches were resolved by extraction of the maxillary lateral incisor on the right side and the mandibular second premolars on both sides. The mesial movement of the mandibular first molars occurred appropriately, with the second molars moving into an upright position. A lip bumper was used with a preadjusted edgewise appliance in the maxillary dentition to reinforce molar anchorage and labial movement of the retroclined incisors. Despite the extraction treatment, a deep bite could be corrected without aggravation as a result of the lip bumper and utility arch in the mandibular dentition. Thus, an Angle Class I molar relationship and an ideal overbite were achieved. The occlusal contact area and masticatory muscle activities during maximum clenching increased after treatment. The maximum closing velocity and the maximum gape during chewing increased, and the chewing pattern changed from the chopping to grinding type. The findings in the present case suggest that the correction of a deep bite might be effective for improving stomatognathic function. (Angle Orthod. 2015;85:314-321.)

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A new look at the treatment of Class II Division 2 malocclusions

Cited by 8 publications

References 2 publications

An assessment of the accuracy of a panoramic radiograph as compared with cone-beam tomography in TMJ imaging

An assessment of the accuracy of a panoramic radiograph as compared with cone-beam tomography in TMJ imaging

Three-dimensional assessment of the temporomandibular joint and mandibular dimensions after early correction of the maxillary arch form in patients with Class II division 1 or division 2 malocclusion

Extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and changes in stomatognathic function

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