正中離開(Median diastema):有病率、新規分類およびエビデンスに基づく調査
Mohammad Khursheed Alam1,2,3, Nawadir Hamoud Alanazi4, Tethkar Mukhlef Alanzi4
1Department of Preventive Dentistry, Orthodontic Division, College of Dentistry, Jouf University, Sakaka, Saudi Arabia.
Journal of orthodontic science
|January 12, 2026
まとめ
上顎正中離開(MMD)はサウジアラビアの成人の25%に影響を与え、男性により一般的です。主な原因は正中シフトと小歯症であり、臨床治療の指針となります。
背景:
- 上顎正中離開(MMD)は、審美的および心理社会的な問題を引き起こす一般的な歯の隙間である。唇側小帯、小歯症、遺伝、口腔習慣など、多因子的な原因が含まれる。
結論:
- MMDは多因子遺伝を示す。新しい形状ベースの分類は診断に役立つ。正中シフトと小歯症はMMDの主要な素因である。
関連する概念動画
Mitral Stenosis II: Clinical features and Diagnostic Tests
209
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
209
Mitral Valve Prolapse II: Assessment and Management
399
IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
399
Aneurysm II: Clinical Manifestations and Diagnostic Studies
261
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
261


