Chaitanya Penmatsa, Reddy Jampanapalli S, Suhasini Konda, Chandrika Inguva H, Praveen Dalavai
Reader, Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
Professor and Head, Department of Pedodontics and Preventive Dentistry Government Dental College and Hospital, Hyderabad Telangana, India.
Int J Clin Pediatr Dent. 2018 Jul-Aug;11(4):330-337. doi: 10.5005/jp-journals-10005-1534. Epub 2018 Aug 1.
Eruption of teeth is influenced by various factors. Very few studies were carried out in the past on the eruption time of teeth in the Indian population.
The aim of the study is to determine the time and sequence, gender differences, pattern of symmetry in the eruption of permanent teeth in Hyderabad children.
In this cross-sectional study, 1654 schoolchildren (806 girls and 848 boys) in the age group of 5 to 15 years from Hyderabad were examined for the status of eruption of permanent teeth.
Results were subjected to probit's regression analysis. The average age at eruption of permanent teeth, excluding third molars, was given as the mean [± standard deviation (SD)] in months for each gender. A table of percentiles of the eruption time was also determined.
Unlike most of the earlier studies which showed that girls are ahead of boys in permanent teeth emergence, no such pattern was observed. No significant difference was found in the eruption of permanent teeth in right and left arches. Eruption of all the mandibular teeth, with the exception of right first premolar (44) in both the genders, was earlier than their maxillary counterparts. There was overall delay in the eruption of permanent teeth and significant delay in the eruption of lower canines in both genders.
The significant delay in the eruption of permanent mandibular canines is relevant for orthodontic treatment planning. Chaitanya P, Reddy JS, Suhasini K, Chandrika IH, Praveen D. Time and Eruption Sequence of Permanent Teeth in Hyderabad Children: A Descriptive Cross-sectional Study. Int J Clin Pediatr Dent 2018;11(4):330-337.
牙齿萌出受多种因素影响。过去针对印度人群牙齿萌出时间的研究极少。
本研究旨在确定海得拉巴儿童恒牙萌出的时间和顺序、性别差异以及对称模式。
在这项横断面研究中，对海得拉巴5至15岁的1654名学童（806名女孩和848名男孩）进行了恒牙萌出状况检查。
结果采用概率回归分析。将除第三磨牙外恒牙萌出的平均年龄以月为单位给出各性别的均值[±标准差（SD）]。还确定了萌出时间的百分位数表。
与大多数早期研究显示女孩恒牙萌出早于男孩不同，本研究未观察到这种模式。左右牙弓恒牙萌出未发现显著差异。除两性的右侧第一前磨牙（44）外，所有下颌牙的萌出均早于其对应的上颌牙。恒牙萌出总体延迟，两性下颌尖牙萌出显著延迟。
下颌恒牙尖牙萌出的显著延迟与正畸治疗计划相关。Chaitanya P、Reddy JS、Suhasini K、Chandrika IH、Praveen D。海得拉巴儿童恒牙的萌出时间和顺序：一项描述性横断面研究。《国际临床儿科牙科学杂志》2018年；11（4）：330 - 337。
