Bimaxillary Protrusion, Dental Malocclusion
Conditions
Keywords
Flapless laser corticotomy, Canine retraction
Brief summary
This study is conducted to evaluate the effects of flapless laser corticotomy on the rate of canine retraction.
Interventions
OTHERFlapless laser corticotomy
The flapless laser corticotomy will be done by Er, Cr: YSGG laser as a series of circular holes will be made along with the planned position. The depth of laser cutting will be measured and controlled continuously during the operation by the periodontal probe with stopper read to each 3mm depth in addition to a few parts of a millimetre depth into the medullary bone to enhance bleeding. Canine retraction will be started after this procedure.
OTHERCanine retraction
canine retraction will be done on 17x25 stst archwire using coil spring adjusted to 150 gm, and miniscrews will be used as an indirect method of anchorage reinforcement
Sponsors
Suez Canal University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
single-blind
Intervention model description
The 14 patients maxillary and mandibular arches will be allocated into a split-mouth design, so the sample will be set up each patient to act as his/her own control
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Full complement of teeth with no congenitally missing teeth except 3rd molars. * Minor or no crowding cases requires four premolars extraction, canine retraction & maximum anchorage with bimaxillary dentoalveolar protrusion. * No history of previous orthodontic treatment * Clinically healthy patients with no history of drug intake and\\or no history for any systemic illness, syndromes, craniofacial deformities. * Vital teeth with normal periodontium and no root resorption. * Adequate oral hygiene; probing depth values not exceeding 3 mm across the entire dentition; adequate thickness of the attached gingiva (1-2 mm). * No radiographic evidence of bone loss.
Exclusion criteria
* Systemic disease that might have affected bone formation or density, such as osteoporosis, hyperparathyroidism, or vitamin D deficiency. * Presence of any local or systemic surgical contraindication. * Extracted or missing permanent tooth/teeth except for 3rd molars. * Facial asymmetry
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Rate of canine retraction. | 3 months of canine retraction , distance (mm) moved by the canine distally per month | distal movement of the canine , measurement unit mm divided by time unit month , using scanned digital models |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Canine rotation | 3 months, assessed at the beginning of treatment (base line ), and at the end of 3 months of canine retraction | rotation of canine measured in degrees , after 3 months of canine retraction using scanned digital models |
| First molar anchorage loss | 3 months, assessed immediately before canine retraction and at the end of 3 months of canine retraction | mesial movement of first molar measured in mm , after 3 months of canine retraction using scanned digital models |
| Root resorption | 3 months , assessed at the beginning of treatment (base line ), and at the end of 3 months of canine retraction | canine root length measured in mm using cone beam CT scans |
| Periodontal condition | 3 months , immediately before canine retraction , and at the end of 3 months of canine retraction | assessed using periodontal probe to measure : probing depth in mm |
| Pulp vitality | 3 months, assessed immediately before canine retraction , and at the end of 3 months of canine retraction | assessed using thermal (Cold ) test , by application of dry cotton sprayed with ethyl chloride |
Countries
Egypt
Outcome results
None listed