Bone density assessment for mini-implants position

Marlon Sampaio BORGES, José Nelson MUCHA

Introduction: The cortical thickness the interradicular spaces width and bone density are the key factor for the efficiency of mini-implants as anchor of resources. The objective was to assess the alveolar and basal bone density in maxilla and mandible in Hounsfield units (HU). Method: Eleven files from adults computed tomography images, were obtained 660 measurements of bone density: alveolar(buccal and lingual cortical),cancellous bone and basal(maxilla and mandible). Values were obtained through the Mimics software version 10.0(Materialise, Belgium). Results: Maxilla: The density of buccal cortical alveolar ranged from 438 to 948 HU, and the lingual from 680 to 950 HU, and the cancellous bone ranged from 207 to 488 HU. The basal bone in buccal showed a variation from 672 to 1380 HU and cancellous bone from 186 to 402 HU. In the mandible: a variation in alveolar bone in the buccal cortical was 782 to 1610 HU, in the lingual cortical alveolar from 610 to 1301 HU, and cancellous bone from 224 to 538. The density in the basal area was from 1145 to 1363 in the buccal cortical and 184 to 485 in the cancellous bone. Conclusions: The greater bone density in the maxilla in the area was observed between the pre-molars in the buccal alveolar cortical. The maxillary tuberosity is the region with lower bone density. The bone density in the mandible was higher than in the maxilla and there was a progressive increase from anterior to posterior and from alveolar to basal bone.

Keywords: Bone Density. Orthodontic Anchorage Procedures. Orthodontics.

Thursday, April 25, 2024 20:07