Gentner M R, Meyers I A, Symons A L
Department of Dentistry, Dental School, The University of Queensland, Brisbane.
J Clin Pediatr Dent. 1991 Fall;16(1):20-4.
The purpose of this study was to investigate the incidence of pulpal floor damage caused by operator error in a standard pulpotomy exercise, and to determine if this damage produced significant changes in dentin morphology and thickness at the base of the pulp chamber. One hundred and fourteen primary molar teeth were utilized in this study, 61 having pulpotomies and the remainder untreated. The dentin thickness in the furcation was measured on all the teeth and the pulpal floor morphology was examined using both light and scanning electron microscopy. The difference in thickness of dentin in the furcation of pulpotomized and non-pulpotomized teeth was not statistically significant. Less than fourteen per cent of pulpotomized teeth showed damage to the pulpal floor and this damage was only minimal in all cases. This study therefore suggests that damage to the pulpal floor during preparation is unlikely to be a factor contributing to failure of pulpotomies.
本研究的目的是调查在标准的牙髓切断术操作中因术者失误导致的髓室底损伤的发生率，并确定这种损伤是否会使髓室底部的牙本质形态和厚度发生显著变化。本研究使用了114颗乳牙，其中61颗进行了牙髓切断术，其余未治疗。测量了所有牙齿根分叉处的牙本质厚度，并使用光学显微镜和扫描电子显微镜检查了髓室底形态。牙髓切断术治疗的牙齿和未治疗的牙齿在根分叉处的牙本质厚度差异无统计学意义。不到14%的牙髓切断术治疗的牙齿显示髓室底有损伤，而且在所有病例中这种损伤都很轻微。因此，本研究表明，在制备过程中髓室底的损伤不太可能是导致牙髓切断术失败的一个因素。
