• Title/Summary/Keyword: Parietal bone

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REGIONAL THICKNESS OF PARIETAL BONE IN KOREAN ADULTS (한국인 성인에서 두정골의 부위별 두께에 대한 연구)

  • Cha, In-Ho;Kim, Hee-Jin;Jeong, Young-Soo;Yi, Choong-Kook;Chung, In-Hyuk
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.20 no.3
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    • pp.269-273
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    • 1998
  • To clarify the clinical utility of the calvarial bone graft in the maxillofacial reconstruction, we performed on anatomical study by measuring the regional thickness of the parietal bone on 17 Korean adult dry skulls. Before the sectioning the calvarium, the anatomical landmarks were marked on each specimens. And then we measured the total thickness of the parietal bone, the thickness of the outer and inner cortical plates on various points in each sections of parietal bones using a digital caliper under the stereomicroscope. The total thickness of the parietal bone was ranged from 5.17mm to 7.50mm, and there were no statistical difference in the total thickness of the parietal bone on the same points bilaterally. But there was a tendency that the thickness of the parietal bone was thicker toward to the lambda point than the coronal suture area. At the other hand, the thickness of the outer and inner plate of the parietal bone was the thickest at the first point of the right aspect on the line 1, the first point of the left aspect on the line 5, respectively. In conclusion, this study showed that the donor site of the parietal bone for the maxillofacial reconstruction should be located at more posterior and medial area of the parietal bone than the prevalent known donor site.

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Benign Osteoblastoma Located in the Parietal Bone

  • Lee, Yong-Gun;Cho, Chang-Won
    • Journal of Korean Neurosurgical Society
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    • v.48 no.2
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    • pp.170-172
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    • 2010
  • Benign osteoblastoma is an uncommon primary bone tumor, extremely rare in calvarium. We present a case of a 25-year-old female with an osteoblastoma of parietal bone which was totally resected. The authors discussed the clinical presentation, radiographic finding, differential diagnosis and management of the benign calvarial osteoblastoma with a review of the literature.

The Effects of Tetracycline-loaded Silk Fibroin Membrane on Guided Bone Regeneration in a Rabbit Calvarial Defect Model (가토 두개골 결손부 모델에서 테트라사이클린 함유 실크 파이브로인 차폐막의 골유도 재생 효과)

  • Lee, Sang-Woon;Park, Yong-Tae;Kim, Seong-Gon;Kweon, HaeYong;Jo, You-Young;Lee, Heui Sam
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.34 no.5
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    • pp.293-298
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    • 2012
  • Purpose: The aim of this study was to evaluate the bone regeneration ability of 1% tetracycline (TC)-loaded silk fibroin membrane (SFM), in a rabbit calvarial defect model. Methods: Twenty New Zealand white rabbits were used for this study. Bilateral round defects were made on the rabbit parietal bone, using trephine bur with an 8 mm diameter. TC-loaded SFM or SFM was covered on the right parietal bone defect, and the left parietal bone defects were uncovered for the control. The animals were humanely sacrificed at 4 or 8 weeks postoperatively. A micro-computerized tomography (${\mu}$-CT) of each specimen was taken for analysis of bone regeneration. Hematoxylin and Eosin stain were done to observe histological findings. Results: From the ${\mu}$-CT results, regenerated bone volume ($mm^3$) of 1% TC-loaded SFM, SFM, and control were $7.80{\pm}5.87$, $8.79{\pm}3.44$, and $10.61{\pm}5.3$ at 4 weeks postoperatively, respectively (P>0.05). Regenerated bone volume ($mm^3$) of 1% TC-loaded SFM, SFM, and control were $36.56{\pm}8.50$, $25.86{\pm}8.17$, and $19.09{\pm}5.07$ at 8 weeks postoperatively, respectively (P<0.05). Conclusion: The 1% TC-loaded SFM showed more bone regeneration than the SFM and the uncovered control, in guided bone regeneration.

Stereotactic Hematoma Removal of Spontaneous Intracerebral Hemorrhage through Parietal Approach

  • Kim, Jeong Hoon;Cho, Tack Geun;Moon, Jae Gon;Kim, Chang Hyun;Lee, Ho Kook
    • Journal of Korean Neurosurgical Society
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    • v.58 no.4
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    • pp.373-378
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    • 2015
  • Objective : To determine the advantages of parietal approach compared to Kocher's point approach for spontaneous, oval-shaped intracerebral hemorrhage (ICH) with expansion to the parietal region. Methods : We divided patients into two groups : group A had burr holes in the parietal bone and group B had burr holes at Kocher's point. The hematoma volume, Glasgow coma scale (GCS) score, and modified Barthel Index (mBI) score were calculated. At discharge, we evaluated the patients' Glasgow outcome scale (GOS) score, modified Rankin Scale (mRS) score, motor grade, and hospitalization duration. We evaluated the patients' mBI scores and motor grades at 6 months after surgery. Results : The hematoma volume in group A was significantly less than that in group B on postoperative days 1, 3, 5, 7, 14, and 21. Group A had significantly higher GCS scores than did group B on postoperative days 1 and 3. Group A had higher mBI scores postoperatively than did group B, but the scores were not significantly different. No differences were observed for the GOS score, mRS score, motor grade at discharge, or duration of hospitalization. The mBI score of group A at 6 months after surgery was significantly higher, and more patients in group A showed muscle strength improvement. Conclusion : In oval-shaped ICH with expansion to the parietal region, the parietal approach is considered to improve the clinical symptoms at the acute phase by removing the hematoma more effectively in the early stages. The parietal approach might help promote the long-term recovery of motor power.

Epidural Hematoma after Minor Trauma on Patient with Biparietal Osteodystrophy

  • Yilmaz, Muhammet Bahadir;Egemen, Emrah;Ozbakir, Bora;Tekiner, Ayhan
    • Journal of Korean Neurosurgical Society
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    • v.53 no.1
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    • pp.57-58
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    • 2013
  • Thinning of parietal bone bilaterally is extremely rare but well known phenomenon. Approximate prevalence is 0.4-0.5% according to radiological scans, case reports and anthropologic researches. Even though biparietal osteodystrophy occurs mostly in over 60-year-old women, it shows no special association with race or geographical area tendency. Current definition was changed by understanding that is a pathological situation, not an anatomical variety or result of growing old in time. Biparietal osteodystrophy may have an unusual presentation and treatment still remains unclear. We aim to present a patient with biparietal osteodystrophy associated with minor head trauma that caused parietal fracture and epidural hematoma underneath.

Multilobular Tumor of Skull in a Maltese Dog (말티즈 견의 두개골에서 발생한 다엽성 종양)

  • Yang, Cheol-ho;Kang, Min-hee;Kim, Seung-gon
    • Journal of Veterinary Clinics
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    • v.33 no.1
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    • pp.48-50
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    • 2016
  • A 10-year-old spayed female Maltese dog weighting 3.4 kg was referred with growing firm mass at the parietal bone region from 2 weeks ago. A firm, partially calcified mass ($1.9cm{\times}4.4cm$) was palpated in the region of the frontal and parietal skulls but had no neurologic signs. Computed tomography (CT) characteristics of mass were round to oval shape, fine granular appearance, and well defined margins. Mass involving the calvarial bones had invasion into the cranial vault with a significant intracranial portion. Histologically, the tumor was characterized by the presence of multiple lobules containing osteoid or cartilage in the center that were separated by anastomosing fibrous septae. This is case report described the clinical and histopathological features of multilobular tumor of skull in a Maltese dog.

Evaluation of bone formation and membrane degradation in guided bone regeneration using a 4-hexylresorcinol-incorporated silk fabric membrane

  • Lee, Sang-Woon;Um, In Chul;Kim, Seong-Gon;Cha, Min-Sang
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.37
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    • pp.32.1-32.5
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    • 2015
  • Background: The aims of present study were (1) to evaluate new bone formation among the 4-hexylresorcinol (4HR)-incorporated silk fabric membrane (SFM), conventional SFM, and uncovered control groups and (2) to compare the amount of residual membrane between the 4HR-incorporated SFM and conventional SFM in a rabbit parietal defect model. Methods: Nine New Zealand white rabbits were used for this animal study. After the formation of a bilateral parietal bone defect (diameter 8.0 mm), either 4HR-incorporated SFM or conventional SFM was grafted into the defect. The defect in the control was left uncovered. New bone formation and the amount of residual membrane were evaluated by histomorphometry at 8 weeks after the operation. Results: The total amount of new bone was $37.84{\pm}8.30%$ in the control, $56.64{\pm}15.74%$ in the 4HR-incorporated SFM group, and $53.35{\pm}10.52%$ in the conventional SFM group 8 weeks after the operation. The differences were significant between the control and 4HR-incorporated SFM group (P = 0.016) and between the control and conventional SFM group (P = 0.040). The residual membrane was $75.08{\pm}10.52%$ in the 4HR-incorporated SFM group and $92.23{\pm}5.46%$ in the conventional SFM group 8 weeks after the operation. The difference was significant (P = 0.039). Conclusions: The 4HR-incorporated SFM and conventional SFM groups showed more bone regeneration than the control group. The incorporated 4HR accelerated the partial degradation of the silk fabric membrane in a rabbit parietal defect model 8 weeks after the operation.

Efficacy Study of Osteradionecrosis Using Fibrin and SDF-1 (피브린과 SDF-1을 사용한 방사성뼈괴사의 효용성연구)

  • Hong-Moon, Jung
    • Journal of the Korean Society of Radiology
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    • v.16 no.6
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    • pp.799-805
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    • 2022
  • Radiation therapy of human tissues, including bone tissue, is accompanied by side effects on normal tissues. It has a more lethal effect on stem cells, which play an essential role in tissue regeneration, including the basal cells constituting the tissue. In this study, the mouse parietal model, which implemented an artificial osteoradionecrosis model on the parietal region of the mouse, was artificially defected and then the bone regeneration was tested. In order to overcome the implemented osteoradionecrosis, a fibrin scaffold, widely used as a biomaterial, and stromal cell-derived factor-1 (SDF-1), which is used as a long-term treatment for damaged, were mixed to verify the osteoradionecrosis regeneration effect on the parietal of mouse. In order to expect a synergistic effect in the fibrin scaffolds, a fibrin scaffolds was prepared after maintaining the concentration of SDF-1 (1 ㎍/ml) in the fibrinogen solution. In this study, after artificially creating a osteoradionecrosis model in the parietal region of mouse, fibrin scaffolds were incorporated to analyze the effect of bone regeneration within 4 weeks, the initial stage of bone regeneration. In conclusion, the combined use of these two substances did not show a dramatic regenerative effect in inducing the regeneration of osteoradionecrosis in the parietal region of mouse. However, positive results were obtained that can be maintain the bone regeneration effect environment at the initial stage. Therefore, the combined use of the fibrin scaffold and SDF-1 is considered to be a suitable candidate for the effect of overcoming osteoradionecrosis.

AN EXPERIMENTAL STUDY ON THE OSTEOGENESIS BY FREEZE-DRIED DEMINERALIZED ALLOGENEIC BONE AND BIOGLASS (냉동 건조 탈회 동종골과 Bioglass의 골형성에 관한 실험적 연구)

  • Min, Seung-Ki;Lee, Dong-Keun;Um, In-Woong;Moon, Cheol;Lee, Eun-Yeong
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.17 no.2
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    • pp.137-152
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    • 1995
  • This study was designed to evaluate the bone formation capability of the bone substitute when compared with autogenic bone, freeze-dried demineralized allogeneic bone and bioglass into parietal bone of the rats. We made the parietal bone defects in $7{\times}7mm$ size on rats and has performed the bone graft in each experimental groups. Postoperatively 1, 2, 4, 6, 8, weeks, each specimen stained with H & E, Masson's trichrome methods. We evaluated the osteogensis capability in each groups. The result were as follow : 1. Inflammatory cell infiltration approached at 1 week and disappeared at 4 weeks in all experimental group, expecially severe in freeze-dried demineralized allogeneic bone group. 2. New capillry proliferation was increased in autogeneic bone graft group than any other groups and was increased till 2 weeks and decreased in freeze-dried demineralized allogeneic bone group and was few in bioglass group. 3. Osteoblastic activity increased in autogeneic bone and freeze-dried demineralized allogeneic bone groups till 4 weeks, and decreased in 6 weeks which no difference between these groups. But, few occurred in bioglass group till 6 weeks. 4. Initial osteoclastic activity was prominent in freeze-dried demineralized allogeneic bone group and few in autogeneic bone group. 5. New bone formation bega at 1 week in autograft and freeze-dried demineralized allogenic bone groups, but, mild new bone formation at 8 weeks in bioglass.

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Solitary Skull Metastasis as the Initial Sign of Follicular Thyroid Cancer - A Case Report - (갑상선 여포암의 초기 증상으로서의 단발성 두개골 전이 1예)

  • Choi, Su-Yun;Cha, Jin-Woo;Song, Sun-Chun;Jang, Hea-Kim;Soh, Euy-Yong
    • Korean Journal of Head & Neck Oncology
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    • v.23 no.1
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    • pp.41-45
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    • 2007
  • A 60 years old female patient presented with $8{\times}6\;cm$ sized painless oval mass in the left parietal region. She had left lobectomy of thyroid gland 10 years ago. Cranial CT, MRI, FGD PET-CT showed a solid mass which invaded left parietal bone. After embolization, craniectomy with tumor excision was performed. Histological examination revealed metastatic follicular cancer originated thyroid gland, with vascular and dura invasion. Postoperatively, neck CT showed right thyroid multiple nodules and right level III multiple lymph node enlargement. Thyroid function test was normal, but level of thyroglobulin was high (72ng/ml). So she had right lobectomy of thyroid gland with lymph node dissection under a diagnosis of follicular carcinoma. But histological examination revealed adenomatous hyperplasia and not lymph node metastasis. After operation, she received radioiodine therapy of 150mCi and then the level of thyroglobulin normalized (8.4ng/ml). The patient is under follow-up since she had operation 4 months ago.