口腔内垂直側面骨切り術(IVRO)と矢状分割側面骨切り術(SSRO)の下顎境界運動に対する効果の違い

The different effects of intraoral vertical ramus osteotomy (IVRO) and sagittal split ramus osteotomy (SSRO) on mandibular border movement.

• Hiroki Komori
• Noriaki Kawanabe
• Tomoki Kataoka
• Yui Kato
• Atsuro Fujisawa
• Takashi Yamashiro
• Hiroshi Kamioka

抄録

目的:

本研究では、口腔内垂直側面骨切り術（IVRO）と矢状分割側面骨切り術（SSRO）が下顎骨境界運動に及ぼす影響の違いを検討した。

OBJECTIVES: This study investigated the different effects of intraoral vertical ramus osteotomy (IVRO) and sagittal split ramus osteotomy (SSRO) on mandibular border movement.

方法:

岡山大学病院で治療を受けたIVROを受けた患者22名とSSROを受けた患者22名が参加しました。下顎境界の動きを光学記録システムを用いて6°の自由度で3次元的に評価した。

METHODS: The participants included 22 patients receiving IVRO and 22 patients receiving SSRO who were treated at Okayama University Hospital. Their mandibular border movement was evaluated in three dimensions with 6° of freedom using an optical recording system.

結果:

最大顎前突時と後突時のコンディラーと下切歯の動きには強い相関関係が認められた。矯正手術後、IVRO群では最大顎前突時および後突時、SSRO群では最大顎前突時にコンディラーおよび下切歯運動の有意な改善が認められた。

RESULTS: A strong correlation between condylar and lower incisor movement was observed during maximum jaw protrusion and laterotrusion. Significant improvements in condylar and lower incisor movement were detected after orthognathic surgery during maximum jaw protrusion and laterotrusion in the IVRO group and during maximum jaw protrusion in the SSRO group.

DISCUSSION:

IVROはSSROよりも顎の動きを改善する可能性が高い。したがって、側頭顎関節の問題を特徴とする顎変形症の患者の治療にIVROの適用が検討される可能性があります。

DISCUSSION: IVRO likely achieves greater improvement in jaw movement than SSRO. Therefore, the application of IVRO could be considered in the treatment of patients with jaw deformities featuring temporomandibular joint problems.