Ulusoy N, Denli N, Atakul F, Nayyar A
Ankara University, Faculty of Dentistry, Turkey.
J Prosthet Dent. 1992 Apr;67(4):450-3. doi: 10.1016/0022-3913(92)90071-h.
The objective of the present investigation was to determine whether injurious thermal changes occur in the pulp chamber if a twist drill is used 10 times, and to find whether there is a correlation between temperature rise and distance between a drilled channel and the pulp chamber. Twenty caries-free, human, premolar teeth were randomly distributed to two dentists. With a new 2 mm twist drill, each dentist prepared 10 pinholes (one hole per tooth). Intrapulpal temperature change during the drilling procedure was recorded. The data were statistically analyzed by the Spearman rank order correlation coefficient. The results showed that twist drills should not be used for more than five pinholes (p less than 0.001). The distance between the pin channel and the pulp chamber does not influence heat generation in the pulp chamber.
本研究的目的是确定如果使用麻花钻钻10次，牙髓腔内是否会发生有害的热变化，并找出温度升高与钻孔通道和牙髓腔之间距离之间是否存在相关性。将20颗无龋的人前磨牙随机分配给两位牙医。每位牙医使用一支新的2毫米麻花钻制备10个针孔（每颗牙一个孔）。记录钻孔过程中的牙髓腔内温度变化。数据采用Spearman等级相关系数进行统计学分析。结果表明，麻花钻钻孔不应超过5个针孔（p小于0.001）。针道与牙髓腔之间的距离不影响牙髓腔内的热量产生。
