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Assessing bone volume for orthodontic miniplate fixation below the maxillary frontal process.
T M Präger1, H G Brochhagen, R Mischkowski
1Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Charité - University Medicine Berlin, Assmannshauser Str. 4-6, 14197, Berlin, Germany, thomas-michael.praeger@charite.de.
Summary
This study measured maxillary bone thickness for orthodontic miniplate placement. Results indicate suitable screw lengths for stable anchorage in treating Class III malocclusions and deep bites.
Area of Science:
- Orthodontic research
- Maxillofacial surgery
- Dental implantology
Background:
- The maxillary bone below the frontal process is a key site for orthodontic anchorage.
- Indications include Class III malocclusion treatment and deep bite correction via skeletal anchorage.
Purpose of the Study:
- To evaluate the bone dimensions in the maxillary anterior region prior to miniplate insertion.
- To determine the feasibility of using this area for orthodontic anchorage.
Main Methods:
- Analysis of 51 thin-slice computed tomography scans from adult patients.
- Measurement of total bone thickness, facial cortical plate thickness, and nasal maxillary buttress width at various levels.
Main Results:
- Maxillary bone volume is greatest at the basal level near the piriform aperture.
- Mean basal bone thickness: 7.8 mm (total), 1.9 mm (cortical), 9.2 mm (buttress width).
- Bone dimensions decrease significantly at cranial levels.
Conclusions:
- Screw lengths of 7 mm are suitable for the piriform aperture base.
- Screw lengths of 5 mm are recommended for the cranial portion of this maxillary region.
