自攻型微钛钉种植体增强磨牙支抗的临床应用研究

目的　介绍自攻型微钛钉种植体用于正畸支抗的临床经验 ,评价该型种植体作为强支抗的有效性。方法　在 6 7例采用自攻型微钛钉种植体作为支抗的临床病例中 ,选择 5例II类骨型、上牙弓前突或双牙弓前突患者 ,矫治设计上颌均为减数双侧第一前磨牙 ,支抗设计为磨牙强支抗。内收前牙阶段的治疗应用自攻型微钛钉支抗种植体 ,种植体植入上颌第一恒磨牙与第二前磨牙颊侧根尖部之间的牙槽间隔 ,以每侧 15 0～ 2 0 0g力滑动法内收前牙。比较内收前后头颅X线侧位片 ,测量前牙内收情况和磨牙支抗的变化。结果　 5例牙弓突度均得到明显改善 ,切牙切缘平均内收 6 4mm ,支抗磨牙平均前移 0 3mm ,均获得磨牙强支抗的效果。治疗过程中种植体均保持了稳定 ,种植体周围软组织健康。结论　自攻微型钛钉种植体能作为稳定的骨性正畸支抗 ,代替口外力的使用 ,起到磨牙强支抗的效能。该型种植体具有操作简单灵活 ,可即刻加力 ,不依赖患者合作的优点

Clinical application of miniscrew implant for maximum anchorage cases

Objective The purpose of this study was to evaluate the efficiency of the self-drilling miniscrew implant for maximum anchorage cases Methods The study comprised 5 patients whose ages ranged from 14 to 31 years All patients presented with Class II skeletal pattern, maxillary protrusion or bimaxillary protrusion Maximum molar anchorage and first premolar extraction were required In the stage of anterior teeth retraction, self-drilling miniscrew implants were inserted into the buccal alveolar bone between maxillary second premolar and first molar Sliding mechanics with 150-200 g force was used to retract anterior teeth The cephalometric films before and after retraction were measured Results Dental protrusion and facial profile were improved significantly in all patients The edge of upper incisors was retracted 6 4mm and anchor molar moved anteriorly 0 3mm averagely All miniscrew implants remained stable during treatment and peri-implant soft tissue remained healthy Conclusions Self-drilling minisrcew implant could be used as an efficient method for anchorage control and an alternative choice of extra-oral forces