Clinical ramifications of posterior and anterior facial height changes between treated and untreated Class II samples

James L. Vaden, Edward Harris, Peter M. Sinclair

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Some clinicians have suggested that one primary difference between successful and unsuccessful Class II treatment outcomes is the relative change of anterior and posterior facial heights. Successfully treated cases are claimed to exhibit greater increases in posterior facial height (PFH, articulare to gonion) than in the anterior facial height (AFH, menton to palatal plane). This conjecture was tested here by recalling a treated Class I sample and a treated Class II sample and by comparing the differences found in these samples to an untreated Class II sample at the same ages. The PFH/AFH ratio increased significantly more in the treated Class I and Class II samples during the active phase of treatment than in the untreated Class II sample at the same ages. During the years from posttreatment to recall (mean = 6 yrs), there was a significant increase in the PFH/AFH ratio in the treated Class II sample due to a greater increase in PFH than AFH. This ratio continued to improve after all appliance therapy had been discontinued, and it did not occur in the treated Class I sample nor in the untreated Class II sample. The conclusion was that the patient with a Class II malocclusion, if treated, continues to change favorably over time. This favorable change, in turn, helps maintain the Class II correction. (AM J ORTHOD DENTOFAC ORTHOP 1994;105:438-43.).

Original languageEnglish (US)
Pages (from-to)438-443
Number of pages6
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume105
Issue number5
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

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Malocclusion
Therapeutics

All Science Journal Classification (ASJC) codes

  • Orthodontics

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Clinical ramifications of posterior and anterior facial height changes between treated and untreated Class II samples. / Vaden, James L.; Harris, Edward; Sinclair, Peter M.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 105, No. 5, 01.01.1994, p. 438-443.

Research output: Contribution to journalArticle

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