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Case Reports
. 2025 Apr 23;29(6):123.
doi: 10.3892/etm.2025.12873. eCollection 2025 Jun.

Customized CAD/CAM coral hydroxyapatite block for horizontal ridge augmentation in severe bone defects: A case report

Shuai Jiang  1 , Wenxue Wang  2 , Chen Zhou  3 , Xiaojing Li  1 , Xin Li  1 , Baodong Zhao  1
Affiliations
Case Reports

Customized CAD/CAM coral hydroxyapatite block for horizontal ridge augmentation in severe bone defects: A case report

Shuai Jiang et al. Exp Ther Med. .

Abstract

Limited data are available on the application of customized bone blocks for horizontal ridge augmentation, particularly those fabricated using coral hydroxyapatite (CHA). The present case report describes a technique for bone augmentation using a customized CHA bone block. The efficacy and clinical feasibility of the technique were evaluated in a 21-year-old man with missing mandibular central incisors and a severe bone defect, with a horizontal bone width of only 2-3 mm. A customized CHA bone block for guided bone regeneration was designed using preoperative cone-beam computed tomography (CBCT) data and computer-aided design and fabricated using a computer-aided manufacturing technique. Following augmentation surgery using the CHA bone block, the soft tissue healed well without dehiscence or infection. After 10 months, CBCT showed that the bone width had increased to 4-8 mm and the implant was inserted. When assessed 7 months later, the value of the implant stability quotient was 70, and the definitive restoration was completed. The customized CHA bone block simplified the surgical procedure, reduced surgical time and minimized postoperative reactions. Therefore, it may serve as a potential alternative to the autogenous bone graft. However, enhancement of the osteoinductive and osteogenic properties of the CHA block would be beneficial, and further studies are required to achieve this.

Keywords: alveolar ridge augmentation; computer-aided design; computer-aided manufacturing; customized; dentistry; hydroxyapatite; implant; oral surgery.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Figure 1
Figure 1
Preoperative clinical presentation of the bone defect. (A) Frontal and (B) occlusal views.
Figure 2
Figure 2
Preoperative bone width assessment by cone-beam computed tomography. (A) Three-dimensional reconstruction, (B) horizontal view and (C) sagittal view.
Figure 3
Figure 3
Customized coral hydroxyapatite bone block. (A) Frontal and (B) occlusal views of the block in its intended position and (C) the bone block model in the design software. (D) Photograph of the customized bone block.
Figure 4
Figure 4
Augmentation surgery. (A) Bone defect with cortical bone perforations. (B) Tenting screw fitted into the pre-designed hole. (C) Bone block fixed with the tenting screw. (D) Bone powder, (E) resorbable membrane and (F) sutured flap covering the block.
Figure 5
Figure 5
Implant surgery. (A) Removal of the tenting screw. (B-D) Drilling and implant insertion. (E) Bone powder and resorbable membrane covering the implant site and (F) sutured flap.
Figure 6
Figure 6
Definitive restoration. (A) Dental implant abutment and (B) crown.
Figure 7
Figure 7
Bone width assessment by cone-beam computed tomography after augmentation surgery. (A) Immediately, (B) 6 months and (C) 10 months after the surgery.
Figure 8
Figure 8
Bone width assessment by cone-beam computed tomography after implant insertion. (A) Immediately and (B) 6 months after implant insertion.
See this image and copyright information in PMC

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