الفهرس 
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Abstract
Aim: The current study was conducted for assessment of arch dimensions among children with
surgically repaired unilateral cleft lip and palate.
Methodology: This Observational (cross-sectional) study was conducted on 233 unilateral cleft lip
and palate patients aged from 8-10 years and had been operated with lip and palate closure. They were
selected from Orthodontics Department at Faculty of Dentistry, Cairo University, and from Pediatric
Dentistry Department at Faculty of Dentistry, Cairo University, and from Pediatric Surgery Clinic for
Orofacial Clefts, Abu El Reesh Children’s Hospital, Cairo University. After an informed consent was
taken by their parents, Extra and intra-oral examination was done by the main investigator then
impressions of the upper and lower arches of all participating children were performed. The impressions
were poured immediately. Dental arch dimensions were measured using digital caliper “Caliper 6”
(Mitutoyo Corporation, Kawasaki, Japan) directly on the dental casts by a single examiner. Data was
analyzed using IBM SPSS program.
Results: Mean of children age was (8.721). There was significant strong positive correlation between
maxillary and mandibular inter-deciduous canine width measurements, and significant strong positive
correlation between maxillary and mandibular inter first deciduous molars width measurements. There
was significant weak positive correlation between maxillary and mandibular inter second deciduous
molars width measurements, there was significant weak positive correlation maxillary and mandibular
inter first permanent molar width measurements.
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All measurements of dimensions of girls were more deficient than boys, with significant difference
between boys and girls for distance between the two mandibular first primary molars (P-value= 0.0053),
significant difference for distance between mandibular inter second deciduous molars (P-value =
0.0001), significant difference for distance between the two maxillary first permanent molars (Pvalue=
0.0123), significant difference for distance between the two mandibular first permanent molars
(P-value= 0.0001).Most of children enrolled in the study (62.66%) performed lip surgery repair from 3
to 6 months, most of the mean of measurements of children performed lip surgery at that interval were
less deficient than those performed before 3 months but more deficient than those performed after 6
months. Most of children enrolled in the study (78.12%) performed palate surgery repair from 9 to 18
months, most of the mean of measurements for those performed palate surgery repair at that interval were
less deficient than those performed before 9 months but more deficient than those performed after 18
Months.
Conclusions: There was positive relation between growth of maxilla and mandible. Deficiency of
measurements in girls more than boys. Deficiency of most of jaws measurements in children had early
surgical repair were more than measurements of children had late surgical repair.