A prospective study of external apical root resorption through the course of orthodontic treatment

Author(s):  
JM. Llamas-Carreras ◽  
A. Amarilla ◽  
E. Espinar-Escalona ◽  
L. Castellanos-Cosano ◽  
J. Martin-Gonzalez ◽  
...  

2016 ◽  
Vol 6 (1) ◽  
pp. 45-48
Author(s):  
Gaurav Gupta ◽  
Raj Kumar Singh ◽  
Ashima Relhan ◽  
Gurkeerat Singh ◽  
Abhishek Goyal

External apical root resorption (EARR) is probably the most common iatrogenic sequel of orthodontic treatment. The present case series focuses on the incisor retraction using frictionless mechanics. Boot loop made up of .019x.025 Stainless steel or TMA archwire were used for maxillary incisor retraction. Retraction with stainless steel boot loop showed greater root resorption as compared to TMA boot loop.Orthodontic Journal of Nepal, Vol. 6 No. 1, June 2016, pp.45-48 


2019 ◽  
Vol 21 (5) ◽  
pp. 494-499
Author(s):  
Ângela Graciela Deliga Schroder ◽  
Mariana Gonzaga Erthal Ribeiro ◽  
Alyssa Sales dos Santos ◽  
Amaro Ilidio Vespasiano Silva ◽  
Flavio Ricardo Manzi

AbstractThe objective of this study was to evaluate the external apical root resorption in the lower incisors after orthodontic alignment and leveling using digital periapical radiographs. The sample consisted of periapical radiographs of 90 lower central incisors from 45 patients, 19 men and 26 women aged 12-36 years (mean 22.7 years). All the 90 lower central incisors were performed periapical radiographs in two phases: 1 - initial before orthodontic treatment and 2 - after alignment and dental leveling phase. The initial periapical radiographs were digitized through a transparency scanner. All patients were treated by the same orthodontist, the inclusion criteria were: never having been treated orthodontically; absence of exodontia, agenesis, malformation or defect in teeth, supernumerary teeth, endodontic treatment and impacted incisors. The time interval between the initial and post-leveling radiographs was from 6 to 12 months, with an average time of 9 months. It was observed that 47.8% of the incisors evaluated presented external apical root resorption, being most grade 1 (irregular contour up to 1 mm reabsorption). There was a positive association of external root resorption with the triangular root shape. There was no association between the severity of root resorption and the type of malocclusion.   An association was observed between age and resorption severity, that is, patients who have already reached bone maturation were more likely to develop apical external root resorption. Female patients were more likely, but when men developed external root resorption, it tended to be a more severe degree. Female adult patients, with a triangular root shape, anatomical apical pipette shape, regardless of malocclusion type are more likely to develop apical external root resorption in orthodontic treatment. Keywords: Radiography, Dental, Digital. Orthodontic. Root Resorption. Resumo Esse estudo teve como objetivo avaliar a reabsorção radicular apical externa nos incisivos inferiores após  alinhamento e nivelamento ortodôntico com radiografias periapicais digitais. A amostra consistiu de 90 radiografias periapicais de incisivos centrais inferiores de 45 pacientes, sendo 19 homens e 26 mulheres com idade entre 12 e 36 anos (média de 22,7 anos). As radiografias periapicais foram realizadas em dois momentos: 1 - inicial antes do tratamento ortodôntico e 2 - após fase de alinhamento e nivelamento dentário. Todas as radiografias foram digitalizadas através de um scanner de transparência. Todos os pacientes foram tratados pelo mesmo ortodontista e preenchiam os seguintes critérios de inclusão: não ter sido tratado ortodonticamente anteriormente; ausência de exodontia, agenesia, malformação ou defeito nos dentes, dentes supranumerários, tratamento endodôntico e incisivos impactados. O intervalo de tempo entre as radiografias inicial e pós-nivelamento foi de 6 a 12 meses, com tempo médio de 9 meses. Observou-se que 47,8% dos incisivos avaliados apresentaram reabsorção radicular apical externa, sendo a maioria de grau 1 (contorno irregular até reabsorção de 1 mm). Houve associação positiva da reabsorção radicular externa com a forma da raiz triangular. Não houve associação entre a gravidade da reabsorção radicular e o tipo de má oclusão. Observou-se associação entre idade e gravidade da reabsorção, ou seja, pacientes que já atingiram a maturação óssea apresentaram maior chance de desenvolver reabsorção radicular externa apical. Pacientes do sexo feminino foram mais frequentes, mas quando os homens desenvolveram reabsorção radicular externa, tenderam a ser mais graves. Um  paciente adulto, do sexo feminino, com formato de raiz triangular, região apical na forma anatômica de pipeta, independentemente do tipo de má oclusão, tem maior probabilidade de desenvolver reabsorção radicular externa no tratamento ortodôntico. Palavras-chave: Radiografia Dentária Digital. Ortodontia. Reabsorção da Raiz. 


2016 ◽  
Vol 46 (1) ◽  
pp. 17
Author(s):  
Eliane Maria Kreich ◽  
Ana Cláudia Chibinski ◽  
Ulisses Coelho ◽  
Letícia Stadler Wambier ◽  
Rosário de Arruda Moura Zedebski ◽  
...  

2021 ◽  
Vol 10 (18) ◽  
pp. 4166
Author(s):  
Agata Ciurla ◽  
Crystal Marruganti ◽  
Tiziana Doldo ◽  
Jolanta Szymańska

Orthodontic-induced external apical root resorption (EARR) is a severe condition affecting the roots of the teeth, whose genetic causes have been inconclusive to date. The aim of the present study was to assess the influence of selected single nucleotide polymorphisms (SNPs) IL-1β, TNFRSF11B, CASP1, and IL-6 genes on post-orthodontic EARR. A sample of 101 patients with clearly assessable orthopantomograms and lateral cephalometric radiographs taken before and at the end of the orthodontic treatment was used to evaluate the presence of EARR. The association between genetic polymorphisms and EARR was assessed with the Chi2 test. A binary logistic multi-level model was built to evaluate the ability of patient- and tooth-level variables to predict EARR occurrence. The overall prevalence of EARR resulted to be around 40%. Within the limitations of this study, a significant association was found between EARR presence and the SNP for the IL-1β gene but not for the TNFRSF11B, CASP1, and the IL-6 genes. The final multi-level model demonstrated that the SNP for the IL-1β gene increases the odds of developing EARR by around four times. Since there is currently no accurate method to determine which patients will develop EARR prior to orthodontic treatment, further studies are needed to investigate the predictive ability of further genetic variants on EARR development.


Author(s):  
Farnaz YOUNESSIAN ◽  
Mohammad BEHNAZ ◽  
Mohammadreza BADIEE ◽  
Kazem DALAIE ◽  
Arezou SARIKHANI ◽  
...  

ABSTRACT Objective: The current study investigated the correlation between pulpal sensitivity to the electric pulp tester (EPT) and external apical root resorption (EARR) in four types of maxillary anterior teeth of fixed orthodontic treatment patients. Methods: In this prospective cohort study, 232 anterior teeth of 58 patients (mean age 18.96 ± 6.13 years) treated with fixed orthodontic treatment were examined. The EPT readings were recorded at twelve time points immediately before archwire insertion. Root resorption of four maxillary incisors were measured by means of parallel periapical radiographs at three time intervals (six months interval from the start) through design-to-purpose software to optimize data collection. A multiple linear regression model and Pearson correlation coefficient were used to assess the association of EPT values and observed EARR (p< 0.05). Results: The highest level of EPT measurement was recorded at initial visit, and then there was a decreasing trend in EPT level during treatment for the next six and twelve months. There was another increasing trend after six months till the finishing time of the treatment. There was a significant correlation between changes in root length and time of recording the root length (p< 0.001). There was significant positive correlation between changes in EPT level and amount of observed root resorption (p< 0.001). Conclusion: The relative decrease in electric pulp test level could be a diagnostic sign of root resorption during orthodontic treatment. Further studies with longer follow up are needed to confirm the current results.


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