Cariology and Endodontics, Section of Clinical Oral Microbiology, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Specialist Clinic for Endodontics, Public Dental Service, Lund, Sweden.
Int Endod J. 2021 Jun;54(6):826-833. doi: 10.1111/iej.13478. Epub 2021 Feb 6.
To investigate the 5-year frequency of additional treatments in relation to the number of reported root filled canals in molar teeth in Sweden.
The cohort included first and second molars in adult individuals who were registered with a root filling performed in 2009. Treatment codes corresponding to root fillings of teeth with from one up to four root filled canals were identified in the Swedish Social Insurance Agency database. The studied additional treatments were extraction, non-surgical root canal retreatment and endodontic surgery during the subsequent 5 years, identified by corresponding codes for these treatments registered on these specific teeth. Differences in the frequency of additional treatments based on the number of root filled canals were analysed using chi-square test and considered statistically significant at P < 0.05.
In 2009, root fillings on a first or second molar tooth were registered in 100 720 individuals. The study included 32 901 maxillary first molars (6.4% with four root filled canals), 12 763 maxillary second molars (3.3% with four root filled canals), 37 703 mandibular first molars (19.2% with four root filled canals) and 17 353 mandibular second molars (3.7% with four root filled canals). The total frequency of additional treatments was 14.3% (n = 14 425) during the 5-year observational period. Additional treatments were more frequent in teeth with 1-3 root filled canals compared to teeth with four root filled canals for maxillary first molars (15.2% vs. 12.7%, P = 0.002), maxillary second molars (13.8% vs. 9.1%, P = 0.007) and mandibular first molars (14.0% vs. 10.7%, P < 0.001) but not mandibular second molars (15.6% vs. 13.7%, P = 0.200).
Over 5 years, 85.7% of the included teeth were not registered with any additional treatments. Maxillary first and second molars and mandibular first molar teeth had a greater frequency of additional treatments when ≤3 root canals were filled compared to four canals.
研究瑞典磨牙根管治疗后 5 年内与报告的根管数量相关的附加治疗频率。
该队列包括在 2009 年接受根管治疗的成人第一和第二磨牙。在瑞典社会保险局数据库中，识别出与一颗牙至四颗牙的根管填充治疗相对应的治疗代码。在随后的 5 年内，通过对应于这些特定牙齿的这些治疗的登记的相应代码，确定了后续的拔牙、非手术根管再治疗和牙髓手术等附加治疗。使用卡方检验分析基于根管数量的附加治疗频率差异，并认为 P 值<0.05 具有统计学意义。
2009 年，共登记了 100720 名患者的第一或第二磨牙根管治疗。该研究包括 32901 颗上颌第一磨牙（6.4%有四颗根管），12763 颗上颌第二磨牙（3.3%有四颗根管），37703 颗下颌第一磨牙（19.2%有四颗根管）和 17353 颗下颌第二磨牙（3.7%有四颗根管）。在 5 年的观察期内，附加治疗的总频率为 14.3%（n=14425）。上颌第一磨牙、上颌第二磨牙和下颌第一磨牙中，1-3 个根管的牙齿比 4 个根管的牙齿更频繁地接受附加治疗（上颌第一磨牙：15.2% vs. 12.7%，P=0.002；上颌第二磨牙：13.8% vs. 9.1%，P=0.007；下颌第一磨牙：14.0% vs. 10.7%，P<0.001），但下颌第二磨牙没有差异（15.6% vs. 13.7%，P=0.200）。
在 5 年内，85.7%的纳入牙齿未接受任何附加治疗。上颌第一和第二磨牙以及下颌第一磨牙的根管数量≤3 个的牙齿比根管数量为 4 个的牙齿接受附加治疗的频率更高。
