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논문 기본 정보

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학술저널
저자정보
Quan Shi (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China) Yang Huang (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China) Na Huo (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China) Yi Jiang (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China) Tong Zhang (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China) Juncheng Wang (Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China)
저널정보
대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics Vol.16 No.4
발행연도
2024.8
수록면
212 - 220 (9page)
DOI
https://doi.org/10.4047/jap.2024.16.4.212

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Purpose. This cone-beam computed tomography (CBCT) study aimed to analyze the anatomical characteristics of alveolar bone at mandibular first molar (MFM) and their implications for immediate implant placement surgery. Materials and methods. 100 patients with 140 MFMs were reviewed retrospectively. We first performed a 3D reconstruction of the patient’s CBCT data to determine a reference plane with ideal implant placement and orientation. The following parameters of MFM region were analyzed: mesial-distal socket size (MD-SS), buccal-lingual socket size (BL-SS), root furcation fornix to inferior alveolar nerve (IAN) distance (RF-I), interradicular bone thickness (IRB), mesial/distal root apex to the IAN distance (MRA-I/DRA-I), thickness of the buccal/lingual bone of the mesial root (MR-B/MR-L), thickness of the buccal/lingual bone of the distal root (DR-B/DR-L). Results. The MD-SS of MFM was 8.74 ± 0.76 mm, and the BL-SS was 8.26 ± 0.72 mm. The MR-B, DR-B was 1.01 ± 0.40 mm and 1.14 ± 0.50 mm, and the difference was statistically significant (P = .001). The values of the MR-L, DR-L were 2.71 ± 0.78 mm and 3.09 ± 0.73 mm, and the difference was also statistically significant (P < .001). The mean distance of RF-I was 15.68 ± 2.13 mm, and the MRA-I was 7.06 ± 2.22 mm, which was greater than that of DRA-I (6.48 ± 2.30 mm, P < .001). The IRB at 2 mm, 4 mm apical from the furcation fornix, and at apex level was 2.81 ± 0.50 mm, 3.30 ± 0.62 mm, and 4.44 ± 1.02 mm, respectively. Conclusion. There is relatively sufficient bone mass in interradicular bone in height, but an adequate width is lacking for the bone between the mesial and distal root after the extraction of the MFM for immediate implantation. The thickness of the MFM buccal bone is relative thin, especially for the mesial root.

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