Moaleem Mohammed Al
Assistant Professor, Department of Prosthodontic, College of Dentistry, Jazan, Jizan, Saudi Arabia.
J Clin Diagn Res. 2017 Mar;11(3):ZC55-ZC59. doi: 10.7860/JCDR/2017/23604.9577. Epub 2017 Mar 1.
Partial edentulism is a prime indicator of overall oral health in a given country. Khat chewing habit in the south region of Saudi Arabia is widely practiced by a majority of the population.
To determine the frequency of Kennedy's classes in each arch among different age groups, gender and to find out the relationship between khat chewing and the pattern of partial edentulism.
The data was collected from 780 subjects reporting to the College of Dentistry, Jazan University, who required removable partial dentures. Clinical intra-oral and radiographic examinations were done. The study subjects were divided into five age groups, 20-29, 30-39, 40-49, 50-59 and ≥ 60 years respectively. Khat chewing hours/day and type of Kennedy's classes were recorded. The data were entered into a Statistical Package for Social Sciences program and analysed accordingly using Fisher-Exact test.
Class III was the highest in all middle age groups followed by Class I. Class III was the highest in males, while in females, Class I was the highest in both arches. Class IV was the lowest in all age groups, both arches, and genders. Among khat chewers Class III was the highest followed by class I in both arches. Class IV was the highest in >12 hours duration in maxilla but in the mandible, Class I and II were the highest in 1-6 hours duration. The obtained p-values were statistically significant (p<0.001) in all tested variables and age groups.
Kennedy's Class III was the highest followed by Class I, while Kennedy's Class IV was the lowest in all age groups and both arches regardless of khat chewing durations. In males Class III, was the highest, while in females Class I was the highest in both arches.
牙列缺损是一个国家整体口腔健康的主要指标。沙特阿拉伯南部地区的大多数人都有广泛的咀嚼恰特草的习惯。
确定不同年龄组、性别的每个牙弓中肯尼迪分类的频率，并找出咀嚼恰特草与牙列缺损模式之间的关系。
数据收集自780名前往吉赞大学牙科学院就诊、需要可摘局部义齿的受试者。进行了临床口腔内检查和影像学检查。研究对象分为五个年龄组，分别为20 - 29岁、30 - 39岁、40 - 49岁、50 - 59岁和≥60岁。记录每天咀嚼恰特草的时长和肯尼迪分类的类型。数据录入社会科学统计软件程序，并使用费舍尔精确检验进行相应分析。
在所有中年组中，Ⅲ类最高，其次是Ⅰ类。Ⅲ类在男性中最高，而在女性中，两个牙弓中Ⅰ类最高。Ⅳ类在所有年龄组、两个牙弓和两种性别中都是最低的。在咀嚼恰特草者中，两个牙弓中Ⅲ类最高，其次是Ⅰ类。在上颌中，Ⅳ类在咀嚼时长>12小时时最高，但在下颌中，Ⅰ类和Ⅱ类在咀嚼时长1 - 6小时时最高。在所有测试变量和年龄组中，获得的p值具有统计学意义（p<0.001）。
无论咀嚼恰特草的时长如何，在所有年龄组和两个牙弓中，肯尼迪Ⅲ类最高，其次是Ⅰ类，而肯尼迪Ⅳ类最低。在男性中Ⅲ类最高，而在女性中两个牙弓中Ⅰ类最高。
