Intrabony Schwannoma of the Mandible: Case Report and Review of Literature

This paper focuses on the case of intrabony mandibular schwannoma in a 39 yrs healthy male who was addressed by his dentist for an asymptomatic radiolucency of the left mandibular corpus. Computed Tomography Dentascan showed a soft tumour continuous to the path of the inferior alveolar nerve. Confirmation was made after surgical excision and careful histological examination. Radiolucent images of the mandible are frequently met by dentists and oro-facial surgeons, and suggest first odontogenic cysts because of their high frequency. But even if sheath nerve tumours are very rare, this case report reminds the necessity to keep them in mind.

Waning of Anti-Spike IgG Antibody Titer after COVID-19 Vaccination: Myth or Reality?

This observational prospective study was conducted on 25 patients who had received a full 3-dose COVID-19 vaccination scheme with a follow-up ranging from 12 to 19 months after the last injection. The aim of the study was focused on a single biological indicator the anti-spike IgG antibody titer. The age of the patients ranged from 51 to 85 years old. 15 out 25 patients (60%) presented a comorbidity. Our data showed a persistent positive anti-spike IgG antibodies titer ranging from 105 to 5680 BAU/mL (mean: 2661 BAU/mL) in all patients. In view of these results, systematic administration of a SARS-CoV-2 vaccine booster is questionable and should be individually tailored according to the patient medical condition and the anti-spike IgG antibody level.

下颌骨牵引成骨术治疗儿童小下颌畸形伴阻塞性睡眠呼吸暂停综合征

目的探讨和评价下颌骨牵引成骨技术在治疗儿童小下颌畸形伴阻塞性睡眠呼吸暂停综合征(obstructivesleepapneasyndrome,OSAS)中的应用价值。方法6例先天性小下颌发育不全畸形伴重度OSAS,年龄4个月至9岁。每例患者术前术后均行X射线头影测量及睡眠多导图仪检查。用牵引成骨技术牵引双侧下颌骨,带动舌和口底肌肉组织前移,使口咽腔通畅,达到治疗小下颌畸形患者OSAS的目的。结果6例12侧下颌骨牵引成骨,最大牵引延长距离为25mm,最小15mm,平均19.2mm。后气道间隙由平均4.5mm增至10.1mm。牵引时间最短10d,最长20d,平均14.5d。所有病例在截骨、牵引器固定过程中均未损伤下牙槽神经血管束。牵引过程顺利,牵引区成骨良好。随访2至11个月。1例需要进行继续治疗,5例均恢复正常呼吸,去除鼻咽导气管和气管切开导管。结论下颌骨牵引成骨术是治疗OSAS重要的有效治疗手段,能够有效地矫正口咽腔气道狭窄,改善呼吸,可在年幼儿童应用。随着应用例数的增多会更详尽阐明其所发挥的作用。

婴幼儿颅缝早闭的额眶畸形矫正

目的 探讨手术治疗婴幼儿颅缝早闭引起的额眶骨畸形的手术方法和手术时机。方法 采用额骨上眶骨联合截骨塑形前移的手术方法。连续收治了 11名患儿 ,2名女性 ,9名男性 ,年龄 6～ 9个月。其中 ,额缝早闭 6例 ,非综合征性单侧冠状缝早闭 2例 ,多骨缝早闭 1例 ,Apert综合征和Saethre Chotzen综合征累及冠状缝等骨缝早闭各 1例。结果 随访 2～ 11个月 ,均取得满意的矫正效果。其中 1例术后发现颅骨顶部 (非术区 )局部隆起 ,经戴头盔 3个月得以控制。未发生明显并发症。结论 额骨上眶骨联合截骨塑形前移方法能够安全、有效地矫正颅缝早闭引起的额眶发育不良。

面中部牵引成骨术矫正综合征性面中部后缩畸形

目的 探讨牵引成骨术治疗面中部后缩畸形的可行性。方法 2 0 0 1至 2 0 0 2年对 4例Crouzon、Apert和Marfan综合征 ,并伴面中部后缩畸形的患者 ,分别行LeFortIII内置式延长器 (2例 )、LeFortIII水平外置式延长器 (1例 )、monobloc水平内置式延长器 (1例 )治疗 ,于截骨后 4d开始牵引延长 ,速度为每天 1mm。结果 按计划完成牵引 ,面中部前移 8～ 2 0mm。面中部后缩畸形明显减轻 ,双侧对称 ,尤其眶、鼻根部效果更佳 ,随访 4个月至 1年 ,效果稳定。结论 骨牵引成骨术具有传统的植骨加坚强内固定的方法所无法比拟的优点 ,能较大范围前移面中部 ,是矫正各种发育不良造成的严重面中部后缩畸形的有效而可行的方法。