Palatal implant anchorage reinforcement of posterior teeth: A prospective study
Palatal implant anchorage reinforcement of posterior teeth: A prospective study
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DOI：
10.1016/s0889-5406(99)70204-0
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发表时间：
1999-12-01
影响因子：
3
通讯作者：
Diedrich, P
中科院分区：
文献类型：
--
作者：
Wehrbein, H;Feifel, H;Diedrich, P
研制了一种新型正畸种植体锚固系统(Orthossystem)。这个由钛制成的一体式装置由螺纹型骨内段(长度分别为4 mm和6 mm)、圆柱形跨粘膜颈和基牙组成。带槽的夹帽可将正畸正畸钢丝(横腭杆)固定到种植体上。本前瞻性研究的目的是评估腭部植入的Orthossystem种植体对后牙支抗强化的支抗能力。样本包括9名牙科II类患者(年龄15-35岁)，他们的治疗计划包括拔除上颌第一前磨牙。每名患者均接受1颗种植体植入前腭部中心。在平均无负荷种植体愈合3个月后，插入横腭杆将后牙连接到种植体上。尖牙和门牙的后退是在没有使用依从性头盔或II类弹性材料的情况下完成的。通过测量管型和头颅侧位片，评估支抗丧失的程度以及尖牙和切牙的后退量。平均支抗丧失右侧为0.7 mm，左侧为1.1 mm(P<；0.05)。左右尖牙分别后退6.6 mm和6.4 mm，覆盖减少平均6.2 mm。由于临床评估和拔除后的组织学评估都显示短种植体的稳定性，所以小的支抗丧失很可能是由于正畸力使横腭杆变形造成的。然而，所有患者在没有使用依从性依赖的辅助设备的情况下都实现了治疗目标。介绍了种植体植入过程中和植入后的临床经验，积极的正畸治疗，种植体的回收，以及随后的伤口愈合。
A new orthodontic implant anchor system (Orthosystem) has been developed. This 1-piece device made from titanium consists of a screw-type endosseous section (lengths of 4 and 6 mm), a cylindrical transmucosal neck, and an abutment. Clamp caps with slots provide for attachment of square orthodontic wires (transpalatal bars) to the implant. The aim of the present prospective study was to evaluate the anchorage capacity of palatally inserted Orthosystem implants for anchorage reinforcement of posterior teeth. The sample consisted of 9 dental Class II patients (age 15 to 35 years) whose treatment plan included extraction of the maxillary first premolars. Each of the patients received 1 implant inserted into the center of the anterior palate. After a mean unloaded implant healing period of 3 months, transpalatal bars were inserted to connect the posterior teeth to the implant. Retraction of the canines and incisors was accomplished without the use of compliance-dependent headgear or Class II elastics. The degree of anchorage loss as well as the amount of canine and incisor retraction were evaluated by measurements of the casts and lateral cephalograms. The mean anchorage loss was 0.7 mm on the right side and 1.1 mm on the left (P < .05). The right and left canines were retracted 6.6 and 6.4 mm, respectively, and the mean overjet reduction was 6.2 mm. Because clinical assessment and postremoval histologic assessment both revealed stability of the short implant, the small anchorage loss was most likely from the deformation of the transpalatal bars by the orthodontic forces. Nevertheless, the treatment goal was achieved in all patients without the use of compliance-dependent auxiliaries. The clinical experience during and after implant insertion, active orthodontic treatment, retrieval of the implant, and subsequent wound healing are described.