Three-dimensional evaluation of the mandibular symphyseal region in block graft harvesting for dental implants using cone-beam computed tomography

Abstract

Purpose: The purpose of this study was to analyze the quantity and quality of the mandibular anterior alveolar bone in terms of alveolar width, density, and total alveolar height (TAH) based on dental status, gender, and age. Additionally, this study aimed to quantitatively evaluate the available alveolar height for graft harvesting (AHGH) and examine its variability based on the aforementioned factors. Materials and Methods: This retrospective cone-beam computed tomographic study included a total of 100 subjects. On the basis of gender, dental status, and age, the scans were divided into 3 primary groups and 8 subgroups. The mandibular alveolar width and density were measured 5 mm mesial to the mental foramen bilaterally and at the midline. The TAH was measured at the midline, and the AHGH was measured as the midline distance between 5 mm apical to the root of the canines and 5 mm superior to the lower border. Results: The mandibular alveolar width was statistically similar between dentulous and edentulous patients (P>0.05). A significantly greater density was observed at the midline in edentulous patients (P<0.05). The TAH was significantly greater in edentulous male patients than in edentulous female patients (P<0.05). Dentulous and male patients had significantly greater AHGH than edentulous and female patients, respectively (P<0.05). Conclusion: Based on the data evaluated in this study, it can be concluded that the mandibular symphyseal area has adequate bone quality and quantity for bone graft harvesting for dental implant therapy.

Evaluation of Alveolar Bones in the Context of Orthodontic Single-Tooth Space Closure: A Retrospective Cone Beam Computed Tomography-Based Analysis

“…Studies on the relationship between alveolar bone width and gender have reached different results. Some reported that gender had no effect, while others showed that the width of the alveolar bone in the edentulous regions in men was less than the symmetrical toothed side [20,21]. This study, on the other hand, found that the alveolar bone width in edentulous areas did not differ according to gender, and the bone width in incisor, premolar, and molar edentulous spaces was less than the toothed side.…”

Bone quality and quantity of the mandibular symphyseal region in autogenous bone grafting using cone-beam computed tomography: a cross-sectional study

“…Recommending a safety zone for bone harvesting was not the purpose of this study; however, according to the results of the current study and those of Gandhi V et al, who suggested conservative safe margins of 5mm away from vital structures and inferior cortex of the mandible for bone harvesting [ 11 ], bone length and height of 38 and 10 mm, respectively, could be considered for safe bone harvesting. Attention should be paid to the incisive canal in this safe zone to prevent injury to the mandibular incisive nerve and the associated vasculature in the process of bone harvesting.…”

“…According to the results of a previous study [ 11 , 12 ], the sample size was calculated to be 78 CBCT scans, using the following formula (α = 0.05, β = 0.2, d = 0.65, =4) …”