Background: Zygomatic fracture is one of the most prevalent one among facial fractures caused by vehicle accident, motorcycle accident, fighting, fall and sport injuries. Materials & Methods: This study was a retr...Background: Zygomatic fracture is one of the most prevalent one among facial fractures caused by vehicle accident, motorcycle accident, fighting, fall and sport injuries. Materials & Methods: This study was a retrospective study of our patients during past 6 years. Results: We had 1277 facial fractures, of whom 9 patients had blindness. We had 193 patients with Zygomatic fracture. 98 patients had pure zygomatic fracture and other had complicated fractures. Frequency of blindness due to zygomatic fracture in a period of six years was 4.7% in all and in pure zygomatic fractures was 2.04%. Blindness was most prevalent in age group 20 - 29 years old (55.6%). The most prevalent cause of zygomatic fracture which causes blindness, was motor vehicle accident (77.8%). Blindness was more common in males (77.8%) than females (22.2%). Discussion and Conclusions: One of the most disastrous complication of zygomatic fracture is transection of optic nerve. Very careful examination of fractured bones careful examination of optic nerve and visual acuity and urgent operation and decompression of optic nerve must be performed. About 4% - 5% will have blindness purely due to fracture.展开更多
Extra-articular ankylosis resulting from bony union between the coronoid process and the zygoma is very rare. It may result from facial fractures caused by gunshots, treated or untreated facial fractures or may arise ...Extra-articular ankylosis resulting from bony union between the coronoid process and the zygoma is very rare. It may result from facial fractures caused by gunshots, treated or untreated facial fractures or may arise as an extension of intracapsular ankylosis. We report a case of ankylosis between the coronoid process and the zygomatic arch in a 33-year-old Black male. The bony ankylosis was the result of a 2 year old untreated zygomatic arch fracture. Ankylosis developed secondary to heterotopic bone formation following trauma. The patient was treated by intra-oral coronoidectomy, followed by physiotherapy for three months. He returned for review one year later with a mouth-opening of 40 mm and a stable occlusion.展开更多
Purpose: Solitary bone plasmacytoma [SBP] is a localised variant of plasma cell tumor which commonly affects the axial skeleton but rarely found in the maxillofacial region. We hereby report an unusual case of solitar...Purpose: Solitary bone plasmacytoma [SBP] is a localised variant of plasma cell tumor which commonly affects the axial skeleton but rarely found in the maxillofacial region. We hereby report an unusual case of solitary plasmacytoma of the right zygomatic bone in a 70-year-old Nigerian. Case Report: The patient presented with a painless right zygomatic swelling of 2 years duration. Examination showed that the swelling was of mixed consistency [mostly bony but firm in some areas] and it measured about 8 × 8 cm. Radiographic examination revealed an osteolytic lesion over the right zygoma with involvement of the apex and lateral wall of the antrum. An initial working diagnosis of ossifying fibroma was made and the patient was scheduled for surgery. Histological staining with H & E and immunohistochemistry of the surgical specimen however confirmed a diagnosis of SBP. Serum monoclonal protein and Bence Jones proteinuria was negative throughout the follow up period. Conclusion: SBP of the maxillofacial region is amenable to surgery combined with postoperative radiotherapy. However, prognosis can be worsened with tumor recurrence or dissemination into MM. Thus patients with SBP must be closely followed up after treatment so that immediate therapeutic steps can be taken if recurrence or systemic dissemination is encountered.展开更多
目的:探讨如何使用Simplant软件对上颌骨骨量不足的患者进行颧种植体设计,并在手术导航中实施。方法:5例上颌后牙区骨量不足的患者使用Simplant软件基于CBCT数据进行种植体设计,并在导航下实行手术。结果:5例患者植入种植体后,位置与术...目的:探讨如何使用Simplant软件对上颌骨骨量不足的患者进行颧种植体设计,并在手术导航中实施。方法:5例上颌后牙区骨量不足的患者使用Simplant软件基于CBCT数据进行种植体设计,并在导航下实行手术。结果:5例患者植入种植体后,位置与术前设计方案比较发现,种植体与Fankfort平面所成角度(angle,A)偏差小于1°,颧骨内种植体的长度(length in zygoma,LZ)距眶壁距离(distance to orbit wall,D)、牙槽骨内种植体长度(length in alveolar bone,LA)的偏差均小于2mm,术后12个月随访无种植体失败。结论:通过Simplant软件进行颧种植体设计,可以使种植方案更加完善,与手术导航系统的联合使用可以实现精准手术,大大提升了复杂颧种植手术的安全性和准确性。展开更多
文摘Background: Zygomatic fracture is one of the most prevalent one among facial fractures caused by vehicle accident, motorcycle accident, fighting, fall and sport injuries. Materials & Methods: This study was a retrospective study of our patients during past 6 years. Results: We had 1277 facial fractures, of whom 9 patients had blindness. We had 193 patients with Zygomatic fracture. 98 patients had pure zygomatic fracture and other had complicated fractures. Frequency of blindness due to zygomatic fracture in a period of six years was 4.7% in all and in pure zygomatic fractures was 2.04%. Blindness was most prevalent in age group 20 - 29 years old (55.6%). The most prevalent cause of zygomatic fracture which causes blindness, was motor vehicle accident (77.8%). Blindness was more common in males (77.8%) than females (22.2%). Discussion and Conclusions: One of the most disastrous complication of zygomatic fracture is transection of optic nerve. Very careful examination of fractured bones careful examination of optic nerve and visual acuity and urgent operation and decompression of optic nerve must be performed. About 4% - 5% will have blindness purely due to fracture.
文摘Extra-articular ankylosis resulting from bony union between the coronoid process and the zygoma is very rare. It may result from facial fractures caused by gunshots, treated or untreated facial fractures or may arise as an extension of intracapsular ankylosis. We report a case of ankylosis between the coronoid process and the zygomatic arch in a 33-year-old Black male. The bony ankylosis was the result of a 2 year old untreated zygomatic arch fracture. Ankylosis developed secondary to heterotopic bone formation following trauma. The patient was treated by intra-oral coronoidectomy, followed by physiotherapy for three months. He returned for review one year later with a mouth-opening of 40 mm and a stable occlusion.
文摘Purpose: Solitary bone plasmacytoma [SBP] is a localised variant of plasma cell tumor which commonly affects the axial skeleton but rarely found in the maxillofacial region. We hereby report an unusual case of solitary plasmacytoma of the right zygomatic bone in a 70-year-old Nigerian. Case Report: The patient presented with a painless right zygomatic swelling of 2 years duration. Examination showed that the swelling was of mixed consistency [mostly bony but firm in some areas] and it measured about 8 × 8 cm. Radiographic examination revealed an osteolytic lesion over the right zygoma with involvement of the apex and lateral wall of the antrum. An initial working diagnosis of ossifying fibroma was made and the patient was scheduled for surgery. Histological staining with H & E and immunohistochemistry of the surgical specimen however confirmed a diagnosis of SBP. Serum monoclonal protein and Bence Jones proteinuria was negative throughout the follow up period. Conclusion: SBP of the maxillofacial region is amenable to surgery combined with postoperative radiotherapy. However, prognosis can be worsened with tumor recurrence or dissemination into MM. Thus patients with SBP must be closely followed up after treatment so that immediate therapeutic steps can be taken if recurrence or systemic dissemination is encountered.
文摘目的:探讨如何使用Simplant软件对上颌骨骨量不足的患者进行颧种植体设计,并在手术导航中实施。方法:5例上颌后牙区骨量不足的患者使用Simplant软件基于CBCT数据进行种植体设计,并在导航下实行手术。结果:5例患者植入种植体后,位置与术前设计方案比较发现,种植体与Fankfort平面所成角度(angle,A)偏差小于1°,颧骨内种植体的长度(length in zygoma,LZ)距眶壁距离(distance to orbit wall,D)、牙槽骨内种植体长度(length in alveolar bone,LA)的偏差均小于2mm,术后12个月随访无种植体失败。结论:通过Simplant软件进行颧种植体设计,可以使种植方案更加完善,与手术导航系统的联合使用可以实现精准手术,大大提升了复杂颧种植手术的安全性和准确性。
