Bishara S E, Treder J E, Damon P, Olsen M
University of Iowa, College of Dentistry, Department of Orthodontics, 200 Dental Science S., Iowa City 52242-1001, USA.
Angle Orthod. 1996;66(6):417-22. doi: 10.1043/0003-3219(1996)066<0417:CITDAA>2.3.CO;2.
The purpose of this longitudinal investigation was to study changes in the dental arches and dentition that occur in midadulthood in an untreated, normal sample. The subjects had Class I molar and canine relationships with less than 4.0 mm of overjet and less than 50% overbite. None had undergone previous orthodontic treatment. Evaluations and measurements were made from dental casts and periapical radiographic surveys of 15 females and 15 males from approximately 25 years to 46 years. The findings indicate that over the span of the study, significant changes occur in the maxillary and mandibular dental arches and dentition in both males and females, including a clinically significant increase in tooth size-arch length (circumference) discrepancy. These changes should be considered part of the normal maturational process and should be taken into consideration when planning treatment and retention options for adolescent and adult patients.
这项纵向研究的目的是研究未经治疗的正常样本在中年期牙弓和牙列的变化。受试者磨牙和尖牙关系为I类，覆盖小于4.0毫米，覆牙合小于50%。均未接受过正畸治疗。对15名女性和15名男性从大约25岁到46岁的石膏模型和根尖X线片进行了评估和测量。研究结果表明，在研究期间，男性和女性的上颌和下颌牙弓及牙列均发生了显著变化，包括牙齿大小与牙弓长度（周长）差异在临床上显著增加。这些变化应被视为正常成熟过程的一部分，在为青少年和成年患者制定治疗和保持方案时应予以考虑。
