Sheats R D, Strauss R A, Rubenstein L K
Department of Restorative Dentistry, Medical College of Virginia, Richmond 23298.
J Oral Maxillofac Surg. 1991 Dec;49(12):1299-303; discussion 1304. doi: 10.1016/0278-2391(91)90307-8.
beta-Tricalcium phosphate ceramic, a resorbable synthetic bone material, was implanted into surgically created alveolar defects mesial to the mandibular first premolars of 12 adult male cats. Similar defects on the contralateral side were allowed to heal naturally. Six weeks later, nickel-titanium coiled springs were ligated between the mandibular canine and first premolar on both sides and activated to deliver 100 g of force. The distance between the canine and first premolar was measured with dial calipers at 0, 3, 6, and 9 weeks after appliance placement. Regression analysis of amount of tooth movement between the two teeth showed no significant difference between grafted and control sides. This suggests that placement of a resorbable synthetic bone material may have useful applications in situations where loss of alveolar width following extractions may compromise orthodontic tooth movement.
β-磷酸三钙陶瓷是一种可吸收的合成骨材料，被植入到12只成年雄性猫下颌第一前磨牙近中的手术造成的牙槽骨缺损处。对侧的类似缺损则任其自然愈合。六周后，在两侧的下颌尖牙和第一前磨牙之间结扎镍钛螺旋弹簧并激活，以施加100克的力。在矫治器放置后的0、3、6和9周，用游标卡尺测量尖牙和第一前磨牙之间的距离。对两颗牙齿之间牙齿移动量的回归分析表明，移植侧和对照侧之间没有显著差异。这表明，在拔牙后牙槽骨宽度丧失可能会影响正畸牙齿移动的情况下，放置可吸收的合成骨材料可能有有用的应用。
