Alexithymia Predicts Cognitive Deficits In Patients With Idiopathic Parkinson's Disease.
Fixed retainers
Orthodontic retention
Spiral wire
Journal
Journal of Ayub Medical College, Abbottabad : JAMC
ISSN: 1819-2718
Titre abrégé: J Ayub Med Coll Abbottabad
Pays: Pakistan
ID NLM: 8910750
Informations de publication
Date de publication:
Historique:
entrez:
15
3
2019
pubmed:
15
3
2019
medline:
2
5
2019
Statut:
ppublish
Résumé
Most of the orthodontic cases require a long period of retention which is usually carried out with the help of fixed retainers (FR). One of the downsides of FR is that these are prone to breakages. The aim of the present study was to identify the frequency and factors associated with failure of fixed spiral wire retainers.. A retrospective crosssectional study was conducted using orthodontic files and dental casts of 126 patients from dental clinics of a tertiary care hospital. Descriptive statistics were applied to calculate the frequency and most common site of breakages. Chi-square test was applied to compare the frequency of breakages among age groups and different retainer spans. Independent sample ttest was used to compare the mean overbite in retainer breakage and retainer intact groups. A p-value ≤0.05 was considered as statistically significant. The frequency of retainer breakage was found to be 53.1%. Maxillary retainer breakages were found in 41.3% subjects whereas mandibular retainer failed in 22.2% subjects. The mean survival time of retainer was 8.91±4.57 months. The detachment of the retainer from the tooth surface was the most common occurrence (86%). The most common site of retainer breakage was maxillary canine (32.5%) and mandibular central incisor (12.7%). All the subjects who had retainers extending till maxillary molars encountered breakages.. A longer retainer span is associated with a greater risk of breakage. Failure rate in the maxillary arch was higher than the mandibular arch. The most common sites were the maxillary canine and mandibular central incisor. The most common pattern was wire detachment.
Sections du résumé
BACKGROUND
BACKGROUND
Most of the orthodontic cases require a long period of retention which is usually carried out with the help of fixed retainers (FR). One of the downsides of FR is that these are prone to breakages. The aim of the present study was to identify the frequency and factors associated with failure of fixed spiral wire retainers..
METHODS
METHODS
A retrospective crosssectional study was conducted using orthodontic files and dental casts of 126 patients from dental clinics of a tertiary care hospital. Descriptive statistics were applied to calculate the frequency and most common site of breakages. Chi-square test was applied to compare the frequency of breakages among age groups and different retainer spans. Independent sample ttest was used to compare the mean overbite in retainer breakage and retainer intact groups. A p-value ≤0.05 was considered as statistically significant.
RESULTS
RESULTS
The frequency of retainer breakage was found to be 53.1%. Maxillary retainer breakages were found in 41.3% subjects whereas mandibular retainer failed in 22.2% subjects. The mean survival time of retainer was 8.91±4.57 months. The detachment of the retainer from the tooth surface was the most common occurrence (86%). The most common site of retainer breakage was maxillary canine (32.5%) and mandibular central incisor (12.7%). All the subjects who had retainers extending till maxillary molars encountered breakages..
CONCLUSIONS
CONCLUSIONS
A longer retainer span is associated with a greater risk of breakage. Failure rate in the maxillary arch was higher than the mandibular arch. The most common sites were the maxillary canine and mandibular central incisor. The most common pattern was wire detachment.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM