Loss Of Primary Molars Research Articles

Assessment of space changes in the lower dental arch after the premature unit loss of a primary molar: A randomized clinical trial.

Premature loss of primary teeth presents a significant challenge in oral health, with conflicting views on using space maintainers. To assess mandibular arch space changes associated with premature lower primary molar (PM) loss with or without a space maintainer. A randomized clinical trial with children (6-9 years old) with premature loss of a lower PM divided into two groups: control group (CG), without a space maintainer, and intervention group (IG), with a space maintainer. Dental casts were measured at baseline, 3 months, and 6 months. Linear distance; intercanine width and length; and arch width, length, and perimeter were measured. ANOVA and t-test were applied (p = .05). Twenty-six patients (mean: 7.3 years; standard deviation [SD]: 0.92) were included: 14 in CG and 12 in IG. CG had a greater space loss (-0.9 mm; SD: 0.45) than IG (-0.4 mm; SD: 0.61) at 3 months (p < .05). No difference between the groups was observed after 6 months (p = .610). CG decreases space at 6 months, especially with the first permanent molars without intercuspation (-2 mm; SD: 0.71; p = .007). Premature lower PM loss resulted in reduced arch space loss after 6 months, regardless of a space maintainer use. CG showed more loss of space when the first permanent molars lacked intercuspal relationship.

Masticatory Performance and the Related Factors in Korean Children and Adolescents

This study aimed to evaluate the masticatory performance of Korean children and adolescents and to investigate related factors. Early loss of primary molars, degree of occlusion of first molars, occlusal relationship of first molars, and presence of anterior crossbite were considered. From March 2020 to July 2021, 56 children and adolescents between the ages of 6 and 12 were included. The mixing ability index (MAI) was calculated to evaluate the masticatory efficiency of children and adolescents. The subjects were classified into three groups according to the number of early lost primary molars; normal dentition, 1 - 2 teeth lost, more than 3 teeth lost. The number of participants are 23, 18, and 15, respectively. There was no difference in the MAI values between the normal dentition group and the group has 1 - 2 teeth lost. However, when 3 or more primary molars were lost, the MAI value decreased and a significant difference was observed. This study is the first study to evaluate the masticatory performance of children and adolescents in Korea, and it will be helpful to pediatric dentists who evaluate the masticatory performance of children and adolescents and strive to improve the masticatory efficiency of children and adolescents in clinical practice.

The effects of unilateral premature loss of maxillary primary molars on the dental arch dimensions

Background: The aim of the study was to evaluate the amount of changes in the horizontal and vertical maxillary arch dimensions measurements following the premature loss of primary molars. Materials and methods: The sample consist of (50) children with unilateral prematurely extracted either first or second primary molars at the mixed dentition stage. Results and Conclusions: Results shows that there was an increase in the vertical incisor to canine distance (A) with both premature loss of first & second primary molars due to distal movement of primary canines and at the same time there were a significant loss of space in the extraction space with premature loss of second primary molar due to a mesial movement of maxillary first permanent molars which at the same time tip lingually and this is clear obvious from the decrease in the inter-molars distances horizontally.