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Root resorption of self-ligating and conventional preadjusted brackets in severe anterior crowding Class I patients: a longitudinal retrospective study.

Chen W, Haq AA, Zhou Y - BMC Oral Health (2015)

Bottom Line: Quantitative measurements of crown and root lengths for the maxillary and the mandibular central and lateral incisors were compared.No statistically significant difference in root resorption between the two appliance systems was found.There was no significant difference in root resorption between self-ligating brackets and conventional brackets in severe crowding incisors subjects.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, China. weiting163@163.com.

ABSTRACT

Background: To test the hypothesis that there is no difference in the apical root resorption seen after orthodontic treatment with the conventional brackets and the self-ligating brackets.

Methods: Pre-treatment and post-treatment periapical radio-graphs of 70 patients, (35 treated with the Damon3 0.022" bracket and 35 with the 0.022" 3 M bracket) were studied. The long cone paralleling technique was used for all the radio-graphs. Any image distortion between the pre-treatment and post-treatment radio-graph was calculated and compensated for by using the crown length measurements, on the assumption that the crown length remains unaltered during the treatment period. Quantitative measurements of crown and root lengths for the maxillary and the mandibular central and lateral incisors were compared. Means and standard deviations for the percentage root resorption per tooth group were calculated. A paired t-test and non paired t-test analysis was performed to determine whether there was an appliance, treatment time, or initial age effect on the amount of root resorption seen after treatment.

Result: No statistically significant difference in root resorption between the two appliance systems was found. The patient's degree of root resorption were graded as grade 1 and grade 2 in the self-ligating group which is more than the conventional group.

Conclusions: There was no significant difference in root resorption between self-ligating brackets and conventional brackets in severe crowding incisors subjects.

No MeSH data available.


Related in: MedlinePlus

Flow diagram of participants through each stage of the trial
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Fig1: Flow diagram of participants through each stage of the trial

Mentions: For this retrospective study, 359 participants were screened in the Department of orthodontic, hospital of stomatology, Wenzhou Medical University. 289 participants were excluded because they did not meet the inclusion criteria. At last, 70 patients were enrolled in this study, for further details see Fig. 1. They were divided into two groups: Group I (n = 35; 18 female and 17 male subjects using passive self-ligating brackets with a 0.022 × 0.028 in. slot (Damon 3, OMRCO, USA) and Group II (n = 35; 19 female and 16 male subjects using conventional pre-adjusted brackets with a 0.022 × 0.028 in. slot (3 M Unitek, California, USA).Fig 1


Root resorption of self-ligating and conventional preadjusted brackets in severe anterior crowding Class I patients: a longitudinal retrospective study.

Chen W, Haq AA, Zhou Y - BMC Oral Health (2015)

Flow diagram of participants through each stage of the trial
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4590271&req=5

Fig1: Flow diagram of participants through each stage of the trial
Mentions: For this retrospective study, 359 participants were screened in the Department of orthodontic, hospital of stomatology, Wenzhou Medical University. 289 participants were excluded because they did not meet the inclusion criteria. At last, 70 patients were enrolled in this study, for further details see Fig. 1. They were divided into two groups: Group I (n = 35; 18 female and 17 male subjects using passive self-ligating brackets with a 0.022 × 0.028 in. slot (Damon 3, OMRCO, USA) and Group II (n = 35; 19 female and 16 male subjects using conventional pre-adjusted brackets with a 0.022 × 0.028 in. slot (3 M Unitek, California, USA).Fig 1

Bottom Line: Quantitative measurements of crown and root lengths for the maxillary and the mandibular central and lateral incisors were compared.No statistically significant difference in root resorption between the two appliance systems was found.There was no significant difference in root resorption between self-ligating brackets and conventional brackets in severe crowding incisors subjects.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, China. weiting163@163.com.

ABSTRACT

Background: To test the hypothesis that there is no difference in the apical root resorption seen after orthodontic treatment with the conventional brackets and the self-ligating brackets.

Methods: Pre-treatment and post-treatment periapical radio-graphs of 70 patients, (35 treated with the Damon3 0.022" bracket and 35 with the 0.022" 3 M bracket) were studied. The long cone paralleling technique was used for all the radio-graphs. Any image distortion between the pre-treatment and post-treatment radio-graph was calculated and compensated for by using the crown length measurements, on the assumption that the crown length remains unaltered during the treatment period. Quantitative measurements of crown and root lengths for the maxillary and the mandibular central and lateral incisors were compared. Means and standard deviations for the percentage root resorption per tooth group were calculated. A paired t-test and non paired t-test analysis was performed to determine whether there was an appliance, treatment time, or initial age effect on the amount of root resorption seen after treatment.

Result: No statistically significant difference in root resorption between the two appliance systems was found. The patient's degree of root resorption were graded as grade 1 and grade 2 in the self-ligating group which is more than the conventional group.

Conclusions: There was no significant difference in root resorption between self-ligating brackets and conventional brackets in severe crowding incisors subjects.

No MeSH data available.


Related in: MedlinePlus