Haghi Ashtiani G, Davies J A, Liversidge H M
Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London, E1 2AD, UK.
Eur Arch Paediatr Dent. 2025 Jun;26(3):483-491. doi: 10.1007/s40368-024-00996-2. Epub 2025 Jan 30.
The aim of this study was to assess symmetry of developmental stage of permanent teeth between the left and right side of the jaw, as well as between the maxilla and the mandible.
A sample of 150 panoramic radiographs of individuals aged 6-20 years (69 males, 81 females) were selected from an open-access radiographic collection (Maxwell Museum of Anthropology's orthodontic collection, Albuquerque, USA). All developing immature permanent teeth (n = 489) were scored by the first author using Moorrees and Demirjian tooth stages. Symmetry of developing teeth was assessed between the left and right sides of the jaw, as well as between the maxilla and the mandible using McNemar test with p < 0.05 considered significant.
No significant differences were found comparing left and right sides within the maxilla (n = 489), (McNemar, p = 0.759 M, p = 0.736 D), or within the mandible (McNemar, p = 0.262 M, p = 0.707 D) using either tooth scoring method. Percentage agreement for individual teeth between left and right sides was least for third molars. Significant differences were observed comparing maxillary and mandibular teeth for both tooth scoring methods (n = 978), (McNemar, p = 0.00 M, p < 0.001 D). Percentage agreement for individual teeth between the maxilla and mandible was least for incisors.
In the present sample, differences in tooth formation were not significantly different in left and right side of the jaw while a significant difference (p = 0.00 M, p < 0.001 D) was observed between maxilla and mandible.
本研究旨在评估颌骨左右两侧以及上颌骨与下颌骨之间恒牙发育阶段的对称性。
从一个开放获取的放射影像集（美国阿尔伯克基市麦克斯韦人类学博物馆的正畸影像集）中选取了150例6至20岁个体（69名男性，81名女性）的全景X线片。第一作者使用穆里斯和德米尔坚牙齿发育阶段对所有发育中的未成熟恒牙（n = 489颗）进行评分。使用McNemar检验评估颌骨左右两侧以及上颌骨与下颌骨之间发育中牙齿的对称性，p < 0.05被视为具有显著性差异。
使用两种牙齿评分方法时，上颌骨内（n = 489）左右两侧比较（McNemar，p = 0.759 M，p = 0.736 D）或下颌骨内（McNemar，p = 0.262 M，p = 0.707 D）均未发现显著差异。左右两侧单个牙齿的百分比一致性在第三磨牙中最低。两种牙齿评分方法在上颌牙与下颌牙比较时均观察到显著差异（n = 978），（McNemar，p = 0.00 M，p < 0.001 D）。上颌骨与下颌骨之间单个牙齿的百分比一致性在切牙中最低。
在本样本中，颌骨左右两侧牙齿形成的差异不显著，而上颌骨与下颌骨之间观察到显著差异（p = 0.00 M，p < 0.001 D）。
