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The goal of this randomized clinical study is to assess the factors associated with the failure rate of infra-zygomatic crest orthodontic mini-screws used for anchorage reinforcement during orthodontic treatment.
Researchers will evaluate the influence of mini-screw length, diameter, oral hygiene status, age, sex, and loading time on the failure rate of infra-zygomatic mini-screws. Mini-screw failure will be assessed clinically by the presence of mobility or loss of stability.
Participants will:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Immediate loading mini-screw group | Active Comparator | A 10 mm length and 1.8 mm diameter infra-zygomatic mini-screw will be placed on one side of the maxillary arch and loaded immediately with orthodontic force. |
|
| Delayed loading mini-screw group | Active Comparator | A 12 mm length and 2.0 mm diameter infra-zygomatic mini-screw will be placed on the contralateral side of the maxillary arch and loaded after a delayed period. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Immediate loading infra-zygomatic mini-screw | Procedure | A 10 mm length and 1.8 mm diameter infra-zygomatic mini-screw will be placed on one side of the maxillary arch and loaded immediately with orthodontic force. |
| Measure | Description | Time Frame |
|---|---|---|
| To assess the failure rate of infra-zygomatic orthodontic mini-screws over a three-month follow-up period. Failure will be defined as any degree of clinical mobility or loss of stability of the mini-screw. | This is a split-mouth randomized clinical study in which each participant will receive infra-zygomatic mini-screws bilaterally. One side will receive a 10 mm × 1.8 mm mini-screw with immediate loading, while the contralateral side will receive a 12 mm × 2.0 mm mini-screw with delayed loading. The failure rate will be assessed clinically over a three-month follow-up period.Mini-screw failure will be assessed clinically by the presence of mobility or loss of stability. | over a three-month follow-up period |
| Measure | Description | Time Frame |
|---|---|---|
| To assess the failure rate of infra-zygomatic orthodontic mini-screws over a three-month follow-up period. Failure will be defined as any degree of clinical mobility or loss of stability of the mini-screw |
|
| Measure | Description | Time Frame |
|---|---|---|
| Factors Associated with the Failure Rate of Infra-Zygomatic Orthodontic Mini-Screws | This randomized clinical study will assess the factors associated with the failure rate of infra-zygomatic crest orthodontic mini-screws used for anchorage reinforcement during orthodontic treatment. Researchers will evaluate the influence of mini-screw length, diameter, oral hygiene status, age, sex, and loading time on the failure rate of infra-zygomatic mini-screws. Mini-screw failure will be assessed clinically by the presence of mobility or loss of stability. Participants will receive:
|
Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Mahmood Sajedeen, BDS,FCPS | Bangladesh Medical University (BMU) | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Bangladesh Medical University (BMU), Dhaka,1000 | Dhaka | 1000 | Bangladesh |
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This is a split-mouth randomized clinical study in which each participant will receive infra-zygomatic mini-screws bilaterally. One side will receive a 10 mm × 1.8 mm mini-screw with immediate loading, while the contralateral side will receive a 12 mm × 2.0 mm mini-screw with delayed loading. The failure rate will be assessed clinically over a three-month follow-up period.
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| Delayed loading infra-zygomatic mini-screw | Procedure | A 12 mm length and 2.0 mm diameter infra-zygomatic mini-screw will be placed on the contralateral side of the maxillary arch and loaded after a delayed period |
|
| Over a three-month follow-up period. |
| From October 25 to September 26 |