Journal of Prevention and Treatment for Stomatological Diseases ›› 2016, Vol. 24 ›› Issue (8): 473-476.doi: 10.12016/j.issn.2096-1456.2016.08.008

• Cinical Study • Previous Articles     Next Articles

The application of dental microscope in root canal treatment and retreatment of maxillary first molar

Zheng-yu PENG1,Jie-ru HUANG1,Zhi-fang LI2(),Fei-li WEN2,Sui MAI3   

  1. 1. Department of Stomatology, Meizhou Hospital of Traditional Chinese Medicine, Meizhou 514011, China
    2. Zeshan Stomatological Hospital, Meizhou 514000, China
    3. Hospital of Stomatology, Sun Yet-sen University, Guangzhou 510055, China
  • Received:2016-04-22 Revised:2016-06-08 Online:2016-08-20 Published:2016-08-20
  • Contact: Zhi-fang LI E-mail:731807132@qq.com

Abstract:

Objective To evaluatethe detection rate, typing, and therapeutic effect of second mesiobuccal canals(MB2) of first molars under dental operating microscope.Methods 88 maxillary molars with the presence of MB2 through cone beam computed tomography (CBCT) were collected, in which 68 were received root canal treatment and 20 were received root canal retreatment because of the missing canal of MB2 respectively. The type of mesiobuccal root canal in the former 68 maxillary molars were analyzed under CBCT. The 68 maxillary molars were divided into 2 groups, with 34 in each group. The experienment group received treatment under dental operating microscope, while the control group under naked eyes. MB2 detection rate, treatment and retreatment effect between two groups were compared. The latter 20 maxillary molars were also seperated into 2 groups, in which 10 cases were treated under microscope and 10 cases were treated under naked eye. The effect of retreatment was observed.Results The type of mesiobuccal root canal in 68 maxillary molars under CBCT were mainlytypeⅡand typeⅢ, with the proportion of 77.9% (53 cases) and 22.1% (15 cases) respectively. The detection rate of MB2 in the experimental group was 100%, and 91.2% (30 cases) in the control group, a statistical difference can be found between 2 groups (P < 0.05). 97.5% (33 cases) of the experimental group was successfully treated, and 79.4% (27 cases) for the control group (P < 0.05). The success rate of retreatment under microscope was 60% (6 cases), which was significantly higher than that of the naked eye (P < 0.05). In 3-month and 6-month follow-up, the treatment effect in experimental group was significantly better than the control group (P < 0.05).Conclusion Dental microscope can help to increase MB2 detection rate and improve treatment and retreatment effect.

Key words: Microscope, MB2, Detection, Root canal treatment, Root canal retreatment

CLC Number: 

  • R781.05

Figure 1

Images of typeⅡ under microscope and X-ray"

Figure 2

Images of typeⅢ under microscope and X-ray"

Table 1

Evaluation of MB2 under microscope"

组别 n MB2 疏通情况 效果
检出 未检出 疏通 未疏通 满意 尚可 失败
试验组 34 34 0 34 0 33 1 0
对照组 34 31 3 30 4 27 7 0
χ2 4.25 1.01 5.10
P 0.03 0.31 0.03

Table 2

Effect of root canal treatment in 3-month and 6-month follow-up"

组别 3个月 6个月
成功 改善 失败 成功 改善 失败
试验组 32 2 0 31 3 0
对照组 25 8 1 22 10 2
χ2 6.60 7.30
P 0.04 0.03
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