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

Abstract

BackgroundImplants 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 alveolar ridge and buccal undercut dimension at the anterior maxilla to help develop treatment planning for immediate implant placement.MethodsCBCT scans were screened to include 51 subjects with full dentition at right maxilla. Measurements were taken at the cross sectional views in the middle of the maxillary right central incisor, lateral incisor, and canine 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 alveolar ridge. 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.ResultsAlveolar width increased from coronal to apical direction for each tooth. Mean alveolar widths (mm) were: central incisor, 9.55; lateral incisor, 8.30; canine, 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; canine, 5.11. Undercut depths (mm) were: central incisor, 0.76; lateral incisor, 0.87; canine, 0.73. The percentages of teeth with buccal undercuts were: central incisor, 41 %, lateral incisor, 77 %, and canine 33 %. Male demonstrate significant larger ridge width compared with females for all three teeth.ConclusionsAt anterior maxilla, the lateral incisor has the thinnest alveolar bone, and most frequently exhibits a buccal undercut which is the closest to alveolar ridge compared with other maxillary anterior teeth.

Quantitative and Qualitative Maxillary Jaw Bone Assessment Using Cone Beam Computed Tomography of a Diabetic Versus a Nondiabetic Sample of Egyptian Population.

“…Conversely, these results disagree with a study (Zhang et al, 2015)which found that males demonstrated significantly larger alveolar width compared to females for anterior maxilla.…”

“…This method for selecting the desired cross-sectional image was innovated by the researchers who performed this work. Alveolar Ridge Height:-On the selected cross-sectional cut, a line was plotted and measured perpendicular to another two lines drawn parallel and tangential to the alveolar crest and the nearest anatomical landmark (e.g., floor of the nasal cavity orthe maxillary sinus) (Zhang et al, 2015;Zheng et al, 2015) (Fig 7).…”

“…This line was drawn perpendicular to the line representing the alveolar ridge height and parallel to the other two lines drawn parallel and tangential to the alveolar crest and to the nearest anatomical landmark (Zhang et al, 2015) (Fig 8).…”

The Clinical Effectiveness of Alveolar Ridge Preservation in the Maxillary Anterior Esthetic Zone—A Retrospective Study

“…If the implant had not been inserted in a one‐stage procedure and ridge augmentation had been performed previously, the most recent CBCT before ridge augmentation was used. The alveolar ridge width was measured using a protocol of Zhang et al . An example of the measurement method is shown in the figure below (Figure ).…”

Presencia y Morfometría de Forámenes y Canales Linguales en Cone Beam CT de Mandíbulas de Individuos Chilenos: Correlación con Medición Directa en Hueso

“…Se ha descrito la normalidad y variaciones anatómi-cas para ambos huesos en distintas poblaciones (Cova et al 2003;Jacobs et al 2002;Katakami et al 2009;Kawashima et al 2015; Patil et al 2012;Zhang et al 2015). Este artículo se enfoca en la presencia y características del foramen lingual ubicado en la línea mediana, descrito en la tabla lingual del sector mandibular anterior.…”