Skeletal and dental changes induced by the Flip-Lock Herbst appliance in the treatment of Angle s class II division 1 malocclusion during active growth period: A preliminary study

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Iyer Sushmitha.R.; Premkumar Sridhar; Muruganandam Mangaleswari

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Journal Paper

Paper Information

Journal: JOURNAL OF DENTAL RESEARCH, DENTAL CLINICS, DENTAL PROSPECTS Year:2021 | Volume:15 | Issue:1 Page(s): 59-65

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Title

Skeletal and dental changes induced by the Flip-Lock Herbst appliance in the treatment of Angle s class II division 1 malocclusion during active growth period: A preliminary study

Author(s)

Iyer Sushmitha.R. | Premkumar Sridhar | Muruganandam Mangaleswari | Issue Writer Certificate

Keywords

Class II Functional treatment Herbst appliance

Abstract

Background. The Flip-Lock Herbst (TP Orthodontics Inc. ) is a fixed functional appliance, a variant of the Herbst appliance, introduced by Miller. It is claimed to have better patient tolerance due to its increased freedom for the mandible’ s lateral movements. There have been no studies on the flip lock Herbst till date. This study was undertaken to assess the efficiency of the Flip-Lock Herbst appliance in correcting Angle’ s class II division 1 malocclusion. Methods. Eight subjects in their active growth period with class II division 1 malocclusion due to a retrognathic mandible were included in the study. Standardized lateral cephalometric radiographs were used to evaluate skeletal and dental changes with the SO analysis. Paired samples t-test was used to assess statistical significance. Results. Statistically significant increases in mandibular length (pg/OLp) and effective mandibular length (ar/OLp + pg/OLp) were observed. There was a significant maxillary restraining effect. Dental effects were significant and exhibited class II correction features except for the position of lower incisors within the mandible (ii/OLp-pg/OLp). Skeletal changes accounted for 61% and dental changes for 39% of the total treatment for molar correction. For overjet correction, skeletal changes contributed to 63% and dental changes to 37% of the total treatment. Conclusion. The Flip-Lock Herbst appliance was efficient in correcting Angle’ s class II division 1 malocclusion due to a retrognathic mandible. Both skeletal and dental changes were evident, with the former predominating (60: 40).

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References

Reliability of growth indicators and efficiency of functional treatment for skeletal Class II malocclusion: current evidence and controversies

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APA: Copy

Iyer, Sushmitha.R., Premkumar, Sridhar, & Muruganandam, Mangaleswari. (2021). Skeletal and dental changes induced by the Flip-Lock Herbst appliance in the treatment of Angle s class II division 1 malocclusion during active growth period: A preliminary study. JOURNAL OF DENTAL RESEARCH, DENTAL CLINICS, DENTAL PROSPECTS, 15(1), 59-65. SID. https://sid.ir/paper/775483/en

Vancouver: Copy

Iyer Sushmitha.R., Premkumar Sridhar, Muruganandam Mangaleswari. Skeletal and dental changes induced by the Flip-Lock Herbst appliance in the treatment of Angle s class II division 1 malocclusion during active growth period: A preliminary study. JOURNAL OF DENTAL RESEARCH, DENTAL CLINICS, DENTAL PROSPECTS[Internet]. 2021;15(1):59-65. Available from: https://sid.ir/paper/775483/en

IEEE: Copy

Sushmitha.R. Iyer, Sridhar Premkumar, and Mangaleswari Muruganandam, “Skeletal and dental changes induced by the Flip-Lock Herbst appliance in the treatment of Angle s class II division 1 malocclusion during active growth period: A preliminary study,” JOURNAL OF DENTAL RESEARCH, DENTAL CLINICS, DENTAL PROSPECTS, vol. 15, no. 1, pp. 59–65, 2021, [Online]. Available: https://sid.ir/paper/775483/en

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