Peshawar Dental College, Peshawar.
Abbottabad International Medical and Dental College, Abbottabad.
J Ayub Med Coll Abbottabad. 2022 Jul-Sep;34(Suppl 1)(3):S627-S631. doi: 10.55519/JAMC-03-S1-10132.
Knowledge of tooth morphology is obligatory for achieving success in dental treatment. The root canal configuration of maxillary first premolar (MFP) has been shown to be highly varying. The study was conducted to assess the canal configurations in the roots of upper first premolars within a sample population of Peshawar with the help of tooth cross-sectioning method.
The extracted 250 maxillary first premolars had undergone access cavity preparation after cleaning and pulp was removed from each individual tooth. The root canals were located in the pulp chamber floor and then India ink was injected in to their orifices. When the canals get stained the roots were cross sectioned at three levels to assess the configurations of root canals using a categorization method devised by Weine. SPSS version 19 was used to analyze the data. A p-value of less than 0.05 was considered statistically significant. .
Among 250 maxillary first premolars, the common root canal configuration was Weine's type-IV in 30.4% and type-III in 30.0% teeth. Weine's type-I and type II were observed in 24.8% and 8.8% premolars, respectively. Variable root canal configurations were seen in 6.0% teeth. Apical delta was found in 1 (0.4%) tooth. A highly statistically significant difference was observed when root canal configuration was compared with external root morphology.
Weine's type-IV and type-III root canal configurations were frequently observed in maxillary first bicuspids.
对牙体形态学的了解对于成功进行牙科治疗是必不可少的。上颌第一前磨牙（MFP）的根管形态已被证明存在高度变异性。本研究旨在通过牙体横截法评估巴基斯坦白沙瓦样本人群中上颌第一前磨牙的根管形态。
对 250 颗上颌第一前磨牙进行了开髓洞预备，然后从每颗牙中清除牙髓。根管位于牙髓室底部，然后将印度墨水注入其孔口。当根管染色后，将根部分别在三个水平进行横切，使用 Weine 设计的分类方法评估根管形态。使用 SPSS 版本 19 对数据进行分析。p 值小于 0.05 被认为具有统计学意义。
在 250 颗上颌第一前磨牙中，常见的根管形态为 Weine Ⅳ型占 30.4%，Ⅲ型占 30.0%。WeineⅠ型和Ⅱ型分别见于 24.8%和 8.8%的前磨牙。6.0%的牙齿存在可变根管形态。1 颗（0.4%）牙齿发现根尖 delta。根管形态与外部根形态比较时，差异具有统计学意义。
上颌第一双尖牙中常见的根管形态为 Weine Ⅳ型和Ⅲ型。
