Inflammatory root resorption in primary molars: prevalence and associated factors

Abstract

This study aimed at determining the prevalence of inflammatory root resorption and associated factors in 1068 primary mandibular molars in 453 children 3 to 12 years of age. Age, dental history and medical history were recorded using a questionnaire administered to the children's parents/caregivers. Previously trained and calibrated examiners assessed radiographic images of the primary molars by direct observation, with the aid of a viewing box. Root resorption (physiological or inflammatory), dental crown status (healthy, carious with no pulp involvement, carious with pulp involvement and evidence of restoration), and pulpotomy or pulpectomy were determined. Data analysis involved descriptive statistics, the chi-square test and a multiple logistic regression (p < 0.05). The prevalence of inflammatory root resorption was 16.2% (n = 173). The male gender (OR: 1.4; 95% CI), the 3-to-7-years age bracket (OR: 1.5; 95% CI), an unhealthy dental crown (OR: 8.7; 95% CI), caries with pulp involvement (OR: 7.4; 95% CI), pulpotomy (OR: 3.1; 95% CI), and pulpectomy (OR: 5.4; 95% CI) were risk factors for the occurrence of inflammatory root resorption in primary molars. In conclusion, the prevalence of inflammatory root resorption in the present sample was 16.2%. Gender, age, an unhealthy tooth, caries with pulp involvement, pulpotomy, pulpectomy, and the absence of a restoration were associated with a higher occurrence of inflammatory root resorption in primary molars.

Finite element analysis of rapid canine retraction through reducing resistance and distraction

“…Furthermore, the pattern of force distribution in the PDL and root of the first molar showed that high stress concentration is observed on the root surface at the furcation level, which is in contrast to the canine, which displayed a greater apical concentration. This may explain the high incidence of apical root resorption 25 that appears to occur in the maxillary molar on the root surface at the furcation level, which is difficult to see radiographically in orthodontic treatment.…”

Asymmetrical root resorption in primary mandibular molars: Prevalence and determinants factors

“…[10] Studies have reported that root resorption in primary teeth depends on the germ of permanent successor as well as other factors. [1,[5][6][7][8] Furthermore, the morphological relationship between the roots of the primary teeth and the crowns of the permanent successors should be considered. [2] In this study, a situation in which the germ of the permanent successor completely occupied only one of the roots of the primary tooth was considered atypical resorption, which may explain the greater prevalence of asymmetrical root resorption in the primary molars of children aged 8-12 years, as primary molars undergo a natural exfoliation process in this period, in comparison to those aged 3-7 years.…”

“…These situations of root resorption were associated with areas of periradicular bone rarefactions and tooth decay with pulp involvement, which is in agreement with fi ndings described in previous studies. [1,6,7] It is not possible to identify the initial moment of root resorption clinically or through radiographs. Only advanced stages of root resorption are seen in radiographic exams.…”

“…[2][3][4] The main predictors of root resorption in primary molars are occlusal trauma, necrotic pulp, tumor, child's age, caries with pulp involvement, the absence of restoration, presence of pulpotomy or pulpectomy. [5][6][7] Other aspects, such as the separation of primary roots and the position and size of follicles of the permanent successor crowns, may also be related factors. [8,9] Asymmetric resorption can cause a delay in exfoliation due to an extended retention of the primary tooth in the oral cavity, which could consequently lead to occlusal problems.…”

Case Report: Root resorption caused after pulp death of adjacent primary molar

“…Inflammatory root resorption is not a rare finding in the pediatric community, with spread of infection from a carious tooth as a main cause 2, 3 . In the present case, the interesting finding is that root resorption did not only occur in the carious, necrotic tooth but also occurred in the adjacent vital tooth.…”