Case report: orthopedic treatment of the maxillopalatal complex using RAMPA combined with a novel hybrid intraoral appliance

Yasushi Mitani; Mohammad Moshfeghi; Noriyuki Kumamoto; Takahisa Shimazaki; Yuko Okai-Kojima; Morio Tonogi; Shouhei Ogisawa; Bumkyoo Choi

doi:10.1080/10255842.2025.2609650

Case report: orthopedic treatment of the maxillopalatal complex using RAMPA combined with a novel hybrid intraoral appliance

Yasushi Mitani
, Mohammad Moshfeghi
, Noriyuki Kumamoto
, Takahisa Shimazaki
, Yuko Okai-Kojima
, Morio Tonogi
, Shouhei Ogisawa
, Bumkyoo Choi

School of Dentistry

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports on a clinical case of craniofacial displacement from treatment with a Right Angle Maxillary Protraction Appliance (RAMPA). A seven-year-old girl was treated over 17 months using VomPress (4 months) and Hybrid (13 months) intraoral devices with RAMPA. Finite Element Analysis (FEA) simulations of a skull model with all sutures and validated material properties supported clinical findings. RAMPA produced an anterosuperior maxillary shift, counterclockwise mandibular rotation (−1.0°), and a 2.9° clockwise decrease in RAMUS angle. Both clinical and FEA results show RAMPA with Hybrid enhances maxillary protraction while minimizing downward displacement of the mid-palatine suture.

Original language	English
Journal	Computer Methods in Biomechanics and Biomedical Engineering
DOIs	https://doi.org/10.1080/10255842.2025.2609650
Publication status	Accepted/In press - 2025

Keywords

class III malocclusion
FEA
hybrid
RAMPA
sRME

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10.1080/10255842.2025.2609650

Cite this

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title = "Case report: orthopedic treatment of the maxillopalatal complex using RAMPA combined with a novel hybrid intraoral appliance",

abstract = "This paper reports on a clinical case of craniofacial displacement from treatment with a Right Angle Maxillary Protraction Appliance (RAMPA). A seven-year-old girl was treated over 17 months using VomPress (4 months) and Hybrid (13 months) intraoral devices with RAMPA. Finite Element Analysis (FEA) simulations of a skull model with all sutures and validated material properties supported clinical findings. RAMPA produced an anterosuperior maxillary shift, counterclockwise mandibular rotation (−1.0°), and a 2.9° clockwise decrease in RAMUS angle. Both clinical and FEA results show RAMPA with Hybrid enhances maxillary protraction while minimizing downward displacement of the mid-palatine suture.",

keywords = "class III malocclusion, FEA, hybrid, RAMPA, sRME",

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T2 - orthopedic treatment of the maxillopalatal complex using RAMPA combined with a novel hybrid intraoral appliance

AU - Mitani, Yasushi

AU - Moshfeghi, Mohammad

AU - Kumamoto, Noriyuki

AU - Shimazaki, Takahisa

AU - Okai-Kojima, Yuko

AU - Tonogi, Morio

AU - Ogisawa, Shouhei

AU - Choi, Bumkyoo

PY - 2025

Y1 - 2025

N2 - This paper reports on a clinical case of craniofacial displacement from treatment with a Right Angle Maxillary Protraction Appliance (RAMPA). A seven-year-old girl was treated over 17 months using VomPress (4 months) and Hybrid (13 months) intraoral devices with RAMPA. Finite Element Analysis (FEA) simulations of a skull model with all sutures and validated material properties supported clinical findings. RAMPA produced an anterosuperior maxillary shift, counterclockwise mandibular rotation (−1.0°), and a 2.9° clockwise decrease in RAMUS angle. Both clinical and FEA results show RAMPA with Hybrid enhances maxillary protraction while minimizing downward displacement of the mid-palatine suture.

AB - This paper reports on a clinical case of craniofacial displacement from treatment with a Right Angle Maxillary Protraction Appliance (RAMPA). A seven-year-old girl was treated over 17 months using VomPress (4 months) and Hybrid (13 months) intraoral devices with RAMPA. Finite Element Analysis (FEA) simulations of a skull model with all sutures and validated material properties supported clinical findings. RAMPA produced an anterosuperior maxillary shift, counterclockwise mandibular rotation (−1.0°), and a 2.9° clockwise decrease in RAMUS angle. Both clinical and FEA results show RAMPA with Hybrid enhances maxillary protraction while minimizing downward displacement of the mid-palatine suture.

KW - class III malocclusion

KW - FEA

KW - hybrid

KW - RAMPA

KW - sRME

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JO - Computer Methods in Biomechanics and Biomedical Engineering

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ER -

Case report: orthopedic treatment of the maxillopalatal complex using RAMPA combined with a novel hybrid intraoral appliance

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Keywords

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