The flush terminal plane in the primary dentition is the most predominant primary molar relation followed by mesial and distal step [5, 6,11,13-18] and similar trend was noticed in our study.
Type of molar relationship Sex Total Male Female Flush terminal Count 916 916 1832 plane--bilateral % within SEX 81.6% 79.0% 80.3% Distal step--bilateral Count 97 148 245 % within SEX 8.6% 12.8% 10.7% Mesial step--bilateral Count 43 39 82 % within SEX 3.8% 3.4% 3.6% Unilateral flush terminal Count 37 30 67 plane with distal step % within SEX 3.3% 2.6% 2.9% Unilateral flush terminal Count 28 25 53 plane with mesial step % within SEX 2.5% 2.2% 2.3% Unilateral mesial step with Count 0 0 0 distal step % within SEX 0.0% 0.0% 0.0% Posterior cross-bite Count 1 1 2 % within SEX 0.1% 0.1% 0.1% Total Count 1122 1159 2281 % within SEX 100.0% 100.0% 100.0% [chi square] = 11.179, P = 0.025, significant.
In terms of the molar relationship; flush terminal plane was present in 75% of the children followed by mesial step (13.9%) and distal step (11.1%).
Kabue et al9 found that the straight terminal plane of the deciduous second molars was presented in 53% of the Kenyan children, mesial step in 43% and distal step occlusion in one percent; he concluded that more than half of the children were found to have some form of malocclusion.
In a study conducted by Abu Alhaija, and Qudeimat14 among 3-6 years Jordanian children, mesial step molar relationship was found in 47.7% of children followed by flush terminal molar relationship in 37% and distal step in 3.7%.
Nanda et al4 and Bishara et al16 found high percentage of children with distal step in primary dentition proceed to develop Class II molar relation.
* Distal step: The distal surface of the mandibu-lar primary second molar is distal to the distal surface of the maxillary primary second molar in centric occlusion.
In the determination of the occlusal relationship of both primary second molars and primary canines, the chil-dren with mesial step on one side and distal step on the other were left out of assessment.
Out of the 323 children examined, 75% had flush terminal plane, 11.1% distal step and 13.9% mesial step molar relation.
Age###Flush Terminal Distal Step (30) Mesial Step (40) Total###P-value