Lynch C D, Burke F M
Department of Restorative Dentistry, National University of Ireland, Cork, Ireland.
Eur J Dent Educ. 2006 May;10(2):67-72. doi: 10.1111/j.1600-0579.2006.00397.x.
Root canal therapy is an accepted and successful form of tooth conservation. Educational guidelines require dental schools to ensure that their graduates are competent on graduation at performing root canal therapy. The aim of this investigation was to assess the technical quality of root canal fillings placed by undergraduate students in single-rooted teeth.
A total of 100 radiographs of root canal fillings placed by undergraduate students in single-rooted teeth were examined under even illumination in a darkened room using x2 magnification. These were graded as 'adequate', where the root canal filling was within 2 mm of the radiographic apex, 'under-filled', where the root canal filling was >2 mm from the radiographic apex, and 'over-filled', where the root canal filling was extruded beyond the radiographic apex. The presence of voids, fractured instruments, and root perforations were also noted.
All teeth were obturated with gutta-percha and sealer (Roth Cement), using a cold lateral condensation technique. Of 100 teeth, 10% (n = 10) had voids. Of the remainder, 70% (n = 63) were judged to be 'acceptable', 21% (n = 19) were 'under-filled', and 9% (n = 8) were 'over-filled'. There was no evidence of fractured instruments or root perforations in any root filling examined.
The quality of root canal fillings placed in single-rooted teeth by undergraduate dental students at the University Dental School and Hospital, Cork was acceptable (63% of root fillings placed in single rooted teeth were graded as 'adequate'). The probable reasons for this are multi-factorial, but may be linked to the amount of pre-clinical and clinical teaching in endodontics at the University Dental School and Hospital, Cork. It should be remembered that factors other than radiographic quality/evidence must be considered when determining the outcome of root canal therapy.
根管治疗是一种被认可且成功的牙齿保存方法。教育指南要求牙科学院确保其毕业生在毕业时能够胜任根管治疗操作。本研究的目的是评估本科生在单根牙上进行的根管充填的技术质量。
在暗室中均匀照明条件下，使用2倍放大率对本科生在单根牙上进行的100张根管充填X线片进行检查。这些根管充填情况被分为“合适”，即根管充填物距X线根尖2mm以内；“欠填”，即根管充填物距X线根尖超过2mm；以及“超填”，即根管充填物超出X线根尖。还记录了是否存在空隙、器械折断和根管穿孔情况。
所有牙齿均采用冷侧方加压技术用牙胶尖和封闭剂（Roth水门汀）进行充填。100颗牙齿中，10%（n = 10）存在空隙。其余牙齿中，70%（n = 63）被判定为“可接受”，21%（n = 19）为“欠填”，9%（n = 8）为“超填”。在所检查的任何根管充填中均未发现器械折断或根管穿孔的证据。
科克大学牙科学院和医院的本科牙科学生在单根牙上进行的根管充填质量是可接受的（单根牙根管充填中63%被评为“合适”）。其原因可能是多方面的，但可能与科克大学牙科学院和医院牙髓病学的临床前和临床教学量有关。应当记住，在确定根管治疗结果时，除了X线质量/证据外，还必须考虑其他因素。
