Analysis of mechanical effect of Hotz plate on maxillary growth in cleft children using finite element method

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K10160
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 57060:Surgical dentistry-related
• Research Institution: Okayama University
• Principal Investigator: Iida Seiji 岡山大学, 医歯薬学域, 教授 (40283791)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 口唇裂・口蓋裂 / Hotz床 / 顎発育誘導 / PNAM装置 / 哺乳床 / 口唇形成術

Outline of Final Research Achievements

The purpose of this study is to obtain evidence of the influence of the palatal molding shape of Hotz plate which is the first treatment in the treatment of cleft lip and palate, on jaw growth, which is affected by tongue pressure. We hypothesized that an anterior palatal protuberance would induce forward growth due to tongue pressure. Prior to conducting finite element analysis, we compared jaw development with each device using a dental model. It was found that the effect of forward pressure on the tongue was low, indicating that the hypothesis was false. Therefore, it was considered necessary to demonstrate the effect on the lateral side in future mathematical studies.

Free Research Field

口腔外科学

Academic Significance and Societal Importance of the Research Achievements

口唇裂口蓋裂治療では、形態的機能的問題の解消のため様々な工夫が行われているがその形態的側面から効果を検証することは少ない。今回は力学的な変化について言及を行うべきところであるが、結果として臨床で得られる顎発育について、口蓋の形態の関与は少なく、哺乳改善の効果を目的とすることが明らかとなり、前方への発育誘導を目的とし意図的な形態の変更は意味が少ないことが示され、臨床で有用な常歩として還元できると考えている。