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Abstract：
BACKGROUND: This study aims to evaluate the prevalence of malocclusion and orthodontic features among schoolchildren in the West Bank, Palestine.
METHODS: A stratified cluster sample of 1278 schoolchildren (620 males, 658 females, mean age 12 years and 5 months (± 0.5)) were examined. Candidates who had not received any previous orthodontic treatment were only included. Dental anomalies like missing and ectopic teeth were recorded. The anteroposterior occlusal relationship was assessed based on Angle classification. Overjet and overbite were measured. Crowding and spacing were recorded subjectively. In addition, crossbite, openbite, and midline displacement were recorded. The chi-square test and descriptive analysis were used statistically.
RESULTS: The study found Angle Class I molar relationship in 65%, Class II div 1 in 17%, Class II div 2 in 6%, and Class III in 12% of the sample. An overjet (OJ) of more than 4 mm was present in 17%, and 4% had OJ of more than 6 mm; an OJ of at least 0 mm or less in 36%, and 6% had a reverse OJ. A normal overbite was observed in 53%, while 28% had an increase and 19% had a decreased overbite. An anterior openbite (AOB) was present in 9%, and a scissor bite or anterior crossbite in 6% and 14%, respectively. A posterior crossbite was observed in 12% (9% unilateral and 3% bilateral). Midline displacement was found in (9%). Crowding was observed in 35% and 31% and spacing in 24% and 15% of the maxillary and mandibular arches, respectively. A statistically significant relationship between gender and midline shift, a diastema, spacing in the upper arch, and most dental anomalies was found; males were more affected (p < 0.05).
CONCLUSIONS: This study reported a high prevalence of malocclusion among schoolchildren in Palestine. A collaborative effort should be directed to obtain more monitoring and surveillance of malocclusion more frequently to prevent and control the exacerbation of the problem.
METHODS: A stratified cluster sample of 1278 schoolchildren (620 males, 658 females, mean age 12 years and 5 months (± 0.5)) were examined. Candidates who had not received any previous orthodontic treatment were only included. Dental anomalies like missing and ectopic teeth were recorded. The anteroposterior occlusal relationship was assessed based on Angle classification. Overjet and overbite were measured. Crowding and spacing were recorded subjectively. In addition, crossbite, openbite, and midline displacement were recorded. The chi-square test and descriptive analysis were used statistically.
RESULTS: The study found Angle Class I molar relationship in 65%, Class II div 1 in 17%, Class II div 2 in 6%, and Class III in 12% of the sample. An overjet (OJ) of more than 4 mm was present in 17%, and 4% had OJ of more than 6 mm; an OJ of at least 0 mm or less in 36%, and 6% had a reverse OJ. A normal overbite was observed in 53%, while 28% had an increase and 19% had a decreased overbite. An anterior openbite (AOB) was present in 9%, and a scissor bite or anterior crossbite in 6% and 14%, respectively. A posterior crossbite was observed in 12% (9% unilateral and 3% bilateral). Midline displacement was found in (9%). Crowding was observed in 35% and 31% and spacing in 24% and 15% of the maxillary and mandibular arches, respectively. A statistically significant relationship between gender and midline shift, a diastema, spacing in the upper arch, and most dental anomalies was found; males were more affected (p < 0.05).
CONCLUSIONS: This study reported a high prevalence of malocclusion among schoolchildren in Palestine. A collaborative effort should be directed to obtain more monitoring and surveillance of malocclusion more frequently to prevent and control the exacerbation of the problem.
摘要：
背景：本研究旨在评估西岸学童错牙合畸形和正畸特征的患病率，巴勒斯坦。
方法：对1278名学童(620名男性，658名女性，检查平均年龄12岁5个月(±0.5))。仅包括先前未接受过任何正畸治疗的候选人。记录牙齿异常，例如缺失和异位牙齿。基于角度分类评估前后咬合关系。测量了过喷和过咬。主观记录拥挤和间距。此外,交叉咬合,开口咬伤,并记录了中线位移。采用卡方检验和描述性分析进行统计学处理。
结果：研究发现I类角磨牙关系为65%，II类div1占17%，6%的II类div2，和III类在12%的样品中。超过4毫米的超喷（OJ）占17％，4%的OJ超过6毫米；36%的OJ至少为0毫米或更小，6%的人有反向OJ。在53％中观察到正常的过咬伤，而28%的人有增加，19%的人有减少的过咬。9％的患者出现前开口咬伤（AOB），6%和14%的剪刀咬伤或前交叉咬伤，分别。在12％（单侧9％和双侧3％）中观察到后交叉咬伤。在（9％）中发现了中线位移。在上颌和下颌弓的35％和31％中观察到拥挤，在24％和15％中观察到间距，分别。性别和中线移位之间有统计学意义的关系，舒张，上拱的间距，发现大多数牙齿异常；男性受影响更大（p<0.05）。
结论：这项研究报告了巴勒斯坦学童的错牙合畸形患病率很高。应共同努力，以更频繁地对咬合不正进行更多的监测和监视，以预防和控制问题的恶化。
方法：对1278名学童(620名男性，658名女性，检查平均年龄12岁5个月(±0.5))。仅包括先前未接受过任何正畸治疗的候选人。记录牙齿异常，例如缺失和异位牙齿。基于角度分类评估前后咬合关系。测量了过喷和过咬。主观记录拥挤和间距。此外,交叉咬合,开口咬伤,并记录了中线位移。采用卡方检验和描述性分析进行统计学处理。
结果：研究发现I类角磨牙关系为65%，II类div1占17%，6%的II类div2，和III类在12%的样品中。超过4毫米的超喷（OJ）占17％，4%的OJ超过6毫米；36%的OJ至少为0毫米或更小，6%的人有反向OJ。在53％中观察到正常的过咬伤，而28%的人有增加，19%的人有减少的过咬。9％的患者出现前开口咬伤（AOB），6%和14%的剪刀咬伤或前交叉咬伤，分别。在12％（单侧9％和双侧3％）中观察到后交叉咬伤。在（9％）中发现了中线位移。在上颌和下颌弓的35％和31％中观察到拥挤，在24％和15％中观察到间距，分别。性别和中线移位之间有统计学意义的关系，舒张，上拱的间距，发现大多数牙齿异常；男性受影响更大（p<0.05）。
结论：这项研究报告了巴勒斯坦学童的错牙合畸形患病率很高。应共同努力，以更频繁地对咬合不正进行更多的监测和监视，以预防和控制问题的恶化。
