Arch length preservation, and maintenance of the leeway space in the mixed dentition can often provide an adequate space to resolve lower incisor crowding. Yet, the frequency of this occurrence is not known. To obtain this information, lingual arches
were placed in the mandibular arches of 107 consecutive mixed dentition patients with incisor crowding to preserve arch length and make the leeway space available to resolve the crowding. Arch length decreased by only 0.44mm, whereas the intercanine, interpremolar, and intermolar dimensions increased by0.72-2.27mm. There was an adequate space to resolve the crowding in 65 out of 107 patients(60%). If perfect arch length preservation occurred, there would bean adequate space to resolve the crowding in 73 out of 107 patients(68%)
Malocclusion is considered one of the most prevalent dental problems .This research aimed to study the prevalence of malocclusion states in the Syrian coast community.
The sample of study consists of 1200 patients in mixed dentition stage (569 male
s – 631 females) with mean age (8.65 ± 1.4 years for male, 8.64 ±1.36 years for females).
The study showed a prevalence of malocclusion in about 84.8% of the sample, with about 58.33% for vertical plane malocclusion and 84% for sagittal plane malocclusion, and 37.8% for transversal plane malocclusion.
We concluded that it is very important to improve the hygiene awareness between our community population for better prevention and treatment of these problems.
