Effects of premature loss of primary first molar on 4-8 years old children refer to faculty of dentistry of Qazvin University: 1387-1389

In some cases, deep caries incidence or trauma causes primary first deciduous teeth to loss prematurely which develops different complications such as space loss leading in delayed or urged eruption of permanent successors in turn. The objective of this study was to assess the effects of premature loss of primary first molars on 4-8 years old children referring to the Faculty of Dentistry of Qazvin University between the years 1387-1389. In this descriptive trial, 114 children (48 males, 66 females) subjected to the premature extraction of the primary first deciduous teeth were selected and underwent exact clinical examinations. The results were recorded in a questionnaire and the frequency and percent of different complications following premature loss of the primary first deciduous teeth were reported. In children with the premature loss of the primary first deciduous teeth, the mean space of canine distal and primary second molar mesial aspects was 6.34±1.96 mm in the extraction side and 8.28±0.82 in the control side. In 44 (38.6%) of the subjects, the primary second molar teeth drifted mesially and in 34 (29.8%) ones, the canine moved distally. In 36 (31.6%) individuals; the extracted teeth quickened the eruption of the permanent first premolars. The mean time passed from the teeth extractions was also 21.62 months. 25(21.9%) of subjects used space maintainers while the maintainer type was band and loop in the most cases (80%) and lingual arch in 20% of them. 28 (24.6%) individuals showed occlusal movement of the teeth in the opposite side of the extracted teeth and in 10 (8.8%) of cases, the permanent first premolar was rotated. 22 (19.3%) of cases showed spacing and 42 (36.8%) of them had crowding traits.Due to the different complications associated with the premature loss of the primary deciduous first molars, the development of suitable treatment and preventive cares will help children to achieve acceptable level of oral and dental health.