Clinical trial NCT06502886: Evaluation of The Stability of Orthodontic Treatment After First Premolar Extraction Using Combined Retention Protocol
Official title: Evaluation of The Stability of Orthodontic Treatment After First Premolar Extraction in Adult Patients Using Bonded Retainer Versus Bonded Retainer Combined With Vacuum Formed Retainer : A Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: NA
Conditions: Orthodontic Appliance Complication
Lead sponsor: Cairo University
Sponsor class: OTHER
First posted: 2024-07-16
Enrollment: 24
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The aim of this study is to compare between the stability of anterior and posterior segments in both arches using bonded lingual retainers versus a combined protocol of retention (bonded lingual retainer and vacuum formed retainers). The effect of different treatment changes achieved on the post-treatment stability will be studied in both groups.

Hypothesis: No difference between BR and BR+VFR regarding the stability of anterior segment alignment and posterior segment alignment and interdigitation

Detailed description: Retention is necessary to be done after orthodontic treatment. It aids to prevent the tendency for relapse of teeth toward their pretreatment position. Fixed or removable retention appliances can reduce the risk of relapse, but to date there is still limited evidence on treatment protocols, wearing time and duration. However, long-term retention with bonded lingual retainers is commonly recommended and often considered the gold standard (method of first choice) in orthodontic retention. Regardless of the expected benefits concerning tooth stabilization, aesthetic appearance and independency from the patient's compliance, there have been increasing numbers of reports on undesirable changes in tooth position in the presence of retainers. Since "active" lingual retainers are able to exert forces to teeth, they have been suspected of causing torque changes of adjacent incisors ("X-effect"). Therefore, several authors recommend to insert removable and fixed in both arches for maximum relapse prevention.

Eligibility criteria: Inclusion Criteria:

1. Adult patients at the end of comprehensive orthodontic treatment after extraction of upper and lower first premolars and requiring subsequent application of a lingual and palatal bonded retainers
2. Good oral hygiene
3. Patients whom the pre-treatment records (models) are available
4. Good finishing criteria (ABO grading system)

Exclusion Criteria:

1. Non-extraction orthodontic treatment
2. Poor oral hygiene
3. Dental/congenital anomalies ex: Missing laterals, transposed canines, Cleft lip and palate/craniofacial syndromes
4. Poor finishing criteria (ABO grading system)

Primary outcomes:
measure: Mandibular anterior segment alignment
timeFrame: 6 months
Secondary outcomes:
measure: Maxillary anterior segment alignment
timeFrame: 6 months
Other outcomes:
Locations:
city: Cairo
country: Egypt
facility: Faculty of oral and dental medicine, Cairo university
Study officials:
References: