Background

Bone resorption of the jaw leads to challenging implant placement. Frequently, augmentation of the jaw is necessary. Is calvarian split bone an alternative to other extraoral donor sites and what volume of bone is harvestable? The aim was to evaluate the spatial distribution and the total amount of harvestable calvarian split bone.

Material and Methods

Computerized tomographies of 600 patients were divided into four groups (male and female: ≤45 years and >45 years). The skull was segmented and cut into the harvestable compartments (Os frontale, Ossa parietalia). The volume and thickness of the harvestable bone were calculated.

Results

The overall harvestable bone was 110.644 ± 25.429 cm³. The bone from the Os frontale was significantly less than harvestable bone from the Os parietale (p < 0.001). More bone could be harvested from the right Os parietale. In younger males, significantly more bone could be harvested than in females (females ≤45 years: p = 0.001; females >45 years: p = 0.003). A weak negative correlation existed between the participants’ age and the harvestable bone volume of the left Os parietale (r = −0.087; p = 0.033). The thickness of the harvestable bone from the Ossa parietalia is greater in females than in males.

Conclusion

A great amount of calvarian bone can be harvested to augment the jaw. Surgeons must acknowledge that more bone is harvestable from males than females while the female bone is thicker. Calculating the volume leads to accurate results of the available bone.

中文翻译：

---

可收获的颅骨分裂骨的空间分布和总量的横截面分析

背景

颌骨的骨吸收导致植入物放置具有挑战性。通常，需要增大下颌。颅骨劈开骨是其他口外供体部位的替代品吗？可以收获多少骨量？目的是评估空间分布和可收获的颅骨分裂骨的总量。

材料与方法

600名患者的计算机断层扫描被分为四组（男性和女性：≤45岁和>45岁）。将头骨分割并切成可收获的隔室（Os frontale，Ossa parietalia）。计算可收获骨的体积和厚度。

结果

整体可收获骨为 110.644 ± 25.429 cm³。来自 Os 额叶的骨骼明显少于来自 Os 顶叶的可收获骨骼 ( p < 0.001)。可以从正确的 Os parietale 中收获更多的骨头。在年轻男性，显著多个骨可能比女性（：雌性≤45年收获p ;：雌性> 45岁= 0.001 p = 0.003）。参与者的年龄与左顶骨的可收获骨量之间存在弱负相关（r = -0.087；p = 0.033）。从 Ossa 顶骨可收获的骨头的厚度在女性中比在男性中要大。

结论

可以采集大量的颅骨来增大下巴。外科医生必须承认，男性比女性可收获的骨头更多，而女性的骨头更厚。计算体积可得出可用骨骼的准确结果。