Abduo Jaafar
Restorative Section, Melbourne Dental School, Melbourne University.
School of Computer Science and Software Engineering, University of Western Australia.
J Oral Sci. 2017;59(3):431-438. doi: 10.2334/josnusd.16-0610.
This study evaluated and compared the effect of conventional and digital wax-ups on three lateral occlusion variables: contact number, contact area, and steepness. Dental casts of 10 patients with Angle Class I relationship were included in the study. All patients required fixed prosthodontic treatment that would affect lateral occlusion. The casts of all patients received conventional and digital wax-ups. For pretreatment, conventional wax-up, and digital wax-up casts, contact number, contact area, and occlusion steepness were measured at four lateral positions, that is, at excursions of 0.5, 1.0, 2.0, and 3.0 mm from maximal intercuspation. Lateral occlusion scheme variables were affected by use of diagnostic wax-ups. For all types of casts, contact number decreased as excursion increased. The two types of wax-ups had similar contact number patterns, and contact number was significantly greater for these casts than for pretreatment casts in the earlier stages of excursion. Similarly, contact area gradually decreased with increasing excursion in the pretreatment and conventional and digital wax-up casts. There was only a minimal decrease in occlusion steepness as excursion increased. However, lateral occlusion was generally steeper for digital wax-up casts.
接触点数、接触面积和陡度。研究纳入了10例安氏I类关系患者的牙模。所有患者均需要进行会影响侧方咬合的固定义齿修复治疗。所有患者的牙模均制作了传统蜡型和数字化蜡型。对于治疗前、传统蜡型和数字化蜡型牙模，在四个侧方位置测量接触点数、接触面积和咬合陡度，即在从最大牙尖交错位偏移0.5、1.0、2.0和3.0 mm时进行测量。诊断蜡型的使用会影响侧方咬合方案变量。对于所有类型的牙模，接触点数随偏移增加而减少。两种蜡型具有相似的接触点数模式，并且在偏移早期，这些牙模的接触点数显著多于治疗前牙模。同样，在治疗前、传统蜡型和数字化蜡型牙模中，接触面积随偏移增加而逐渐减小。随着偏移增加，咬合陡度仅略有下降。然而，数字化蜡型牙模的侧方咬合通常更陡。
