Relationship between the Space Loss in the Both Jaws according to the Position and the Number of the Premature Extracted Teeth

There is a difference depending on the number and the position of the prematurely extracted teeth in the dental arch. The aim of the study is to determine the relationship between space loss in the both dental aches according to the number and the position of the extracted teeth. Material and methods We studied 90 children 6 to 9 years old with premature loss of one or more primary teeth divided into three groups according to the severity of the orthodontic deformation. We used two biometric methods for the purpose of the study - the Moyers method and measured the mesial and distal movement of the adjustment teeth by drawing perpendicular lines towards the middle line. Results We determined that the average amount of space lost is 1, 31 mm for the upper and 1, 44 for the lower jaw. The lack of space is more significant when second primary molars are extracted, because of the movement of the first permanent molars. According to the position and the combination of extracted teeth in each jaw in the distal area, the results show that the greatest space loss occur when there are two adjacent tooth lost on the lower jaw. There is also statistically difference when contralateral teeth in the lower jaw absent.