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Soft and Hard Tissue Change of Class II Division 1 cases after Treated by FR-I Appliance

Liang Ming-chen

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Abstract

Objective To investigate the soft and hard tissue changes of Angle ClassⅡdivision 1 patients after treated by FR-I appliance. Methods Ten ClassⅡdivision 1 cases aged 9～11years were included in the study.Cephalometrics analysis was performed before and after treatment.18 hard tissue and 15 soft tissue measurements were included in the analysis.Results After treatment with FR-I, the mean values of SNA,NP-FH,FH-Ns-Pg',S-N'-B',FH-LL,UL-LL,Z angles and lower lip thickness increased significantly; while that of ANB,NA-PA,Ns-Sn-Pos angles and OJ decreased significantly.Upper incisors retroclined and lower incisors proclined slightly.Conclusion FR-I appliacne can effectively induce forward movement of mandible and improved esthetics on soft tissue profile.

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What this paper is about

Objective To investigate the soft and hard tissue changes of Angle ClassⅡdivision 1 patients after treated by FR-I appliance. Methods Ten ClassⅡdivision 1 cases aged 9～11years were included in the study.Cephalometrics analysis was performed before and after treatment.18 hard tissue and 15 soft tissue measurements were included in the analysis.Results After treatment with FR-I, the mean values of SNA,NP-FH,FH-Ns-Pg',S-N'-B',FH-LL,UL-LL,Z angles and lower lip thickness increased significantly; while that of ANB,NA-PA,Ns-Sn-Pos angles and OJ decreased significantly.Upper incisors retroclined and lower incisors proclined slightly.Conclusion FR-I appliacne can effectively induce forward movement of mandible and improved esthetics on soft tissue profile.

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Available abstract

Objective To investigate the soft and hard tissue changes of Angle ClassⅡdivision 1 patients after treated by FR-I appliance. Methods Ten ClassⅡdivision 1 cases aged 9～11years were included in the study.Cephalometrics analysis was performed before and after treatment.18 hard tissue and 15 soft tissue measurements were included in the analysis.Results After treatment with FR-I, the mean values of SNA,NP-FH,FH-Ns-Pg',S-N'-B',FH-LL,UL-LL,Z angles and lower lip thickness increased significantly; while that of ANB,NA-PA,Ns-Sn-Pos angles and OJ decreased significantly.Upper incisors retroclined and lower incisors proclined slightly.Conclusion FR-I appliacne can effectively induce forward movement of mandible and improved esthetics on soft tissue profile.

Key concepts: Medicine, Soft tissue, Hard tissue, Dentistry, Orthodontics, Mandible (arthropod mouthpart), Division (mathematics), Surgery

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