Anterior maxilla XXXX dimension and morphology measurement by cone beam computerized tomography (CBCT) for immediate implant treatment planning.

@entity235 @entity1347 @entity604 @entity133 @entity4265
BACKGROUND: Implants have been widely used to restore missing teeth. Limited information on applied anatomy at the anterior maxilla compromises the clinical outcome for implant placement in this region. In the current study, Cone Beam Computerized Tomography (CBCT) was used to measure @entity133 and buccal undercut dimension at the anterior maxilla to help develop treatment planning for immediate implant placement. METHODS: CBCT scans were screened to include 51 subjects with full dentition at @entity4265 . Measurements were taken at the cross sectional views in the middle of the maxillary right central incisor, lateral incisor, and @entity235 regions. Alveolar height was measured from the alveolar crest to floor of nasal fossa. Alveolar width was measured from the buccal to palatal cortical plate at the coronal, middle, and apical third of the distance from the alveolar crest to floor of the nasal fossa. Buccal undercut location was measured from where the buccal cortical plate started dipping to a line extending at the alveolar crest that was perpendicular to the long axis of the @entity133 . The buccal undercut depth was measured from the deepest point of the undercut at the buccal plate to a line tangent to the buccal plate paralleling the long axis of ridge. RESULTS: Alveolar width increased from coronal to apical direction for each tooth. Mean alveolar widths (mm) were: central incisor, 9.55; lateral incisor, 8.30; @entity235 , 9.62. The lateral incisor had a significantly smaller alveolar width than the other anterior teeth. No significant difference in ridge height was noted among the teeth. Undercut locations from the alveolar crest (mm) were: central incisor, 5.84; lateral incisor, 3.59; @entity235 , 5.11. Undercut depths (mm) were: central incisor, 0.76; lateral incisor, 0.87; @entity235 , 0.73. The percentages of teeth with buccal undercuts were: central incisor, 41%, lateral incisor, 77%, and @entity235 33%. Male demonstrate significant larger ridge width compared with females for all three teeth. CONCLUSIONS: At anterior maxilla, the lateral incisor has the @entity604 , and most frequently exhibits a buccal undercut which is the closest to @entity133 compared with other @entity1347 .
