Treatment effects of the R-appliance and twin block in Class II division 1 malocclusion

Jamilian, Abdolreza; Showkatbakhsh, Rahman; Amiri, Shabnam Sheikholeslam

doi:10.1093/ejo/cjq082

Cited by 15 publications

(11 citation statements)

References 27 publications

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“…Among these, twin block appliance is a widely used myofunctional appliance to correct a skeletal discrepancy in growing individuals. [1][2][3][4][5] Twin block appliance consists of maxillary and mandibular acrylic plates with occlusal blocks inclined at 70 degrees to posture the mandible in the forward position. The treatment with the twin block is divided into twophases: 6 active phase and support phase.…”

Section: Introductionmentioning

confidence: 99%

Twin-layered Twin Block

Durgekar¹,

Kolur²,

Puttaraju³

2018

International Journal of Experimental Dental Science

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Background: Twin-block appliance is a widely used myofunctional appliance to correct a skeletal discrepancy in growing class II individuals. In patients with deep anterior bite and horizontal growth pattern, the posterior maxillary block has to be trimmed for the active eruption of lower molars to flatten the curve of spee. The upper block is trimmed 1-2 mm every appointment to encourage lower molar eruption. By keeping the minimal clearance between the lower molar and upper block the tongue is prevented from spreading laterally between the teeth. This might prevent the eruption of mandibular posterior teeth. We have modified the twin block appliance by incorporating two colors alternatively for the maxillary block. This modification acts as a guide for controlled trimming of the upper block. Conclusion: It is a simple and effective way to prevent the development of lateral open bite during the active phase of twin block therapy. Clinical significance: Prevents excessive trimming of the blocks hence reduces the risk of developing posterior open bite due to tongue spreading laterally between the teeth.

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Section: Introductionmentioning

confidence: 99%

Twin-layered Twin Block

Durgekar¹,

Kolur²,

Puttaraju³

2018

International Journal of Experimental Dental Science

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“…For more than a century, this deformity has been treated with various functional appliances. Many studies have shown the positive effects of different functional appliances such as the Activator, Bionator, Frän-kel-2, Herbst, Twin block, and R-appliance on the treatment of mandibular deficiency (3)(4)(5)(6)(7)(8)(9)(10)(11). Functional appliances can be classified into two groups: tooth-borne and tissue-borne.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bionator and Farmand Appliance on the Treatment of Mandibular Deficiency in Prepubertal Stage

et al. 2017

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Objective: The present study aimed to compare dentoskeletal changes in mandibular-deficient patients treated with Bionator and Farmand appliances.Methods: This study included 54 subjects treated for class II division I malocclusion. All subjects fulfilled the following criteria: ANB>5°, SNB<77°, and overjet >5 mm. The Bionator group consisted of 27 patients (15 girls, 12 boys) with the mean age of 11 (SD 1) years and the Farmand group consisted of 27 patients (17 girls, 10 boys) with the mean age of 11.1 (SD 1.4) years. Statistical analyses were performed using t-test, paired t-test, Wilcoxon, and Mann-Whitney test. Results:In the Farmand group, SNB significantly increased from 74.3° (SD 1.7) to 77.6° (SD 2.3) and ANB decreased by 3.2° (SD 1.7) (p<0.001). In the Bionator group, SNB significantly increased from 75.5° (SD 0.9) to 79° (SD 0.9), and ANB decreased by 3.3° (SD 1.3) (p<0.001). The increase in IMPA showed that the lower incisors were significantly tipped using both appliances. T-test did not show any significant differences between the two groups. Conclusion:Despite the different designs of the appliances, both were successful in the treatment of class II division 1 malocclusion in mandibular-deficient patients.

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“…3 Different removable functional appliances such as Activator, Bionator, Fränkel-2, Herbst, R-appliance, and Twin Block have been used to treat Class II division 1 malocclusions and mandibular deficiency. [4][5][6][7][8][9][10][11][12][13] Fränkel-2 (FR-2) is one of the appliances commonly used in the treatment of Class II division 1 malocclusion. This appliance was developed nearly 50 years ago by Rolf Fränkel as an orthopedic exercise device designed to reprogram the neuromuscular system of the orofacial complex.…”

Section: Introductionmentioning

confidence: 99%

Effects of Farmand and Fränkel-2 functional appliances on mandibular deficiency in late mixed dentition

Pakshir¹,

Jamilian²,

Mokhtar³

et al. 2017

EDUJ

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Cite this article:Pakshir HR, Jamilian A, Mokhtar A, Darnahal A, Kamali Z, Nucci L, Perillo L. Effects of Farmand and Fränkel-2 functional appliances on mandibular deficiency in late mixed dentition. Stoma Edu J. 2017;4(3):176-181.Introduction: The present study aimed to evaluate the cephalometric changes in Class II Division I mandibular deficient patients treated with the Fränkel 2 and Farmand appliances as a new functional appliance. Methodology: Fifty-five subjects treated for Class II Division I malocclusion and mandibular deficiency were selected for the study. Twenty-seven of the subjects (17 girls, 10 boys) with the mean age of 11.1 (SD 1.4) years were treated with the Farmand appliance and twenty-eight of them (15 girls, 13 boys) with the mean age of 11 (SD 1.5) years were treated with the FR-2 appliance. T-test, paired t-test, Wilcoxon and Mann-Whitney test were used to evaluate the data. Results: A skeletal Class I relationship and a marked reduction in overjet were achieved in both treatment groups. ANB decreased significantly by 3.2 (SD 1.7) degrees in the Farmand appliance group and it decreased significantly by 3.5 (SD 1.6) degrees in the Fränkel group. Conclusion: Both Farmand and Fränkel appliances were successful in the correction of mandibular deficiency in Class II Division 1 patients.

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Treatment effects of the R-appliance and twin block in Class II division 1 malocclusion

Cited by 15 publications

References 27 publications

Twin-layered Twin Block

Twin-layered Twin Block

Effect of Bionator and Farmand Appliance on the Treatment of Mandibular Deficiency in Prepubertal Stage

Effects of Farmand and Fränkel-2 functional appliances on mandibular deficiency in late mixed dentition

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