A clinical radiographic retrospective assessment of the success rate of single-visit root canal treatment

AIM: To determine retrospectively the clinical and radiographic success rate of single-visit root canal treatment performed in a busy endodontic practice using contemporary techniques of canal cleaning, shaping and obturation. SUMMARY: Seven hundred and sixty-eight single-visit cases, of which 223 presented for a re-examination appointment ranging from 6 months to 4 years from the day of treatment, were considered. Four endodontists provided examinations for both root canal treatment and re-examinations. Clinical and radiographic data were used to form an overall impression of the outcomes for each case at the time of re-examination. Available demographics and treatment information of these 223 cases were compiled for comparison. The number of treatment visits was not determined by a pretreatment diagnosis or a re-assessment of the pulp status upon entry into the tooth; therefore both vital and necrotic cases, as well as those with and without periradicular pathosis, were included. Statistical analysis was carried out using Chi-square tests and considered variations in failure rates based on gender, provider, tooth type, position and arch. A t-test was used to evaluate data on age. The overall success rate was 89.2%. No statistically significant differences were seen based on gender, age, arch or provider. Statistically, anterior teeth were more successful than posterior teeth.     

一次根管治疗术与两次根管治疗术术后短期临床疗效的比较

目的比较一次根管治疗术与两次根管治疗术术后短期临床疗效,并分析不同因素对疗效的影响。方法将96例需行根管治疗的患者随机分成2组,分别进行一次根管治疗术（一次治疗组）和两次根管治疗术（两次治疗组）,并在术后的1、3d和1周进行随访,记录其疼痛情况,术后3个月行影像学检查,评估分析其短期疗效。结果一次治疗组和两次治疗组在术后短期疼痛和影像学检查方面的差异均无统计学意义;患者的性别及患牙术前根尖周指数（PAI）对根管治疗的术后疗效有一定影响,而患者年龄、患牙解剖牙位、患牙牙髓情况（未出现根尖周病损）的差异对根管治疗术术后疗效影响意义不大。结论一次性根管治疗在术后短期的疼痛发生率较低,在临床可根据实际情况推广应用;患者性别及术前PAI会影响根管治疗的术后疗效。     

Effect of QMix as final irrigation protocol on periapical healing after single-visit root canal treatment: A randomised controlled clinical trial

The aim of this study was to evaluate radiographic periapical repair after endodontic treatment using QMix or NaOCl irrigation in single-rooted teeth with apical periodontitis. In this randomised clinical trial, 60 patients were selected and randomised into two groups (n = 30). After instrumentation of root canals, QMix or NaOCl was used as a final irrigation and the canals obturated with gutta-percha and AH Plus sealer. All the participants were recalled after 12 months and 15 patients were lost to the study so 45 patients were evaluated radiographically according to periapical index (PAI) scores. A significant decrease was seen in PAI scores after 1 year in all patients (p < 0.001). In the QMix and NaOCl group, absence or reduction of radiolucency was observed in 23 of 25 teeth (92%) and 20 of 20 teeth (100%), respectively. There was no significant difference between two groups according to the decrease in PAI score (p = 0.508). Root canal treatments with or without QMix irrigation contributed equally to periapical healing.     

前牙髓腔完全钙化的临床研究

目的：探讨完全钙化根管行根管治疗术的可行性。方法：对26例完全钙化前牙根管行根管治疗术,进行术前术后X线片对比研究。结果：24例顺利完成根管治疗术,2例因根管口完全钙化行根尖手术。结论：完全钙化的前牙根管X线片上显示为根管闭锁,临床上可通过寻找根管口,逐步扩大根管完成根管治疗术,以避免根尖手术或牙拔除术。     

热塑牙胶充填根管临床观察

目的：观察连续波热塑牙胶注射法充填根管的临床效果.方法：选择360例根管治疗患者,共380颗牙,其中240颗牙用热塑牙胶注射充填仪做连续波热塑牙胶充填根管,140颗牙用常规冷牙胶侧方加压充填根管,通过X线片比较两组病例的充填质量并比较两组病例间每根管根充需用时间.结果：X线片显示连续波热塑牙胶充填组欠填率1.67％,超填率2.91％,恰填率95.41％,冷牙胶侧压充填组欠填率8.57％,超填率2.85％,恰填率88.57％,比较两组间欠填率与恰填率有统计学差异（P＜0.05）,连续波热塑牙胶充填组平均每根管根充时间8 min.冷牙胶侧压组充填平均每根管根充时间12 min.连续波热塑牙胶充填组缩短根充时间30％.结论：连续波热塑牙胶充填术比冷牙胶侧方加压充填术根管充填质量更高且节约根充时间,提高了工作效率.     

Prognosis of large cyst-like periapical lesions following nonsurgical root canal treatment: a clinical review

AIM: To evaluate clinically and radiographically the long-term clinical outcome of nonsurgical root canal treatment using calcium hydroxide in teeth with large cyst-like periapical lesions. SUMMARY: A total of 42 mature anterior teeth with large periapical lesions ranging in size from 7 to 18 mm in diameter were included in this study. Fluid samples from the lesions contained cholesterol crystals, which were identified by light microscopy. After adequate draining, the teeth were treated endodontically using calcium hydroxide as the intracanal medicament. All cases were followed up for a period of 2-10 years. Complete healing was observed in 73.8% and incomplete healing in a further 9.5% of cases. KEY LEARNING POINTS: Root canal treatment using calcium hydroxide as an antibacterial dressing was successful in healing large cyst-like periapical lesions. This study suggests that the size of a periapical lesion is not a major determining factor in the decision to perform conventional root canal treatment or surgical removal of the lesion. Even large cyst-like periapical lesions containing cholesterol crystals can heal following nonsurgical root canal treatment.     

根尖周炎根管渗液中前列腺素E2水平的研究

本文用纸捻收集３５例根尖周炎的根管渗液，用放射免疫法测前列腺素Ｅ２含量。结果显示，根管渗液中前列腺素Ｅ２水平随根尖周炎的严重程度而显著增加（Ｐ＜０．０１）；急性期最高，慢性期次之，恢复期最低。     

两种根充糊剂在根管治疗术一次法中的应用

目的:观察Cortisomol糊剂和AH plus糊剂在慢性尖周炎的根管治疗术一次法后的反应及远期疗效.方法:门诊需要做根管治疗的102例110个牙随机分为Cortisornol糊剂组54个牙和AH plus糊剂组56个牙.常规根管预备后,两组分别用Cortisomol糊剂和AH plus糊剂根管治疗术一次法根管充填.结果:治疗后1～7 d Cortisomol糊剂组术后反应率较AH plus糊剂组要低(P＜0.05),远期疗效两组无明显差异(P＞0.05).结论:Cortisomol糊剂用于一次性根管治疗术后反应较轻,且疗效可靠.     

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目的观察急慢性牙髓炎、无根尖症状的慢性根尖周炎行一次性根管治疗的临床疗效。方法选择2000—2005年于大连大学附属中山医院口腔科门诊就诊的急慢性牙髓炎、慢性根尖周炎患者患牙173颗,随机分成两组,分别进行一次性根管治疗与多次治疗,并于2年后复诊。通过X线和临床检查评价两组患牙愈合情况以及疗效上的差异。结果一次性根管治疗组的治愈率为92.86%,多次治疗组的治愈率为89.89%,χ2检验结果显示P>0.05,两组疗效差异无统计学意义。结论一次性根管治疗组的治愈率与多次治疗组差异并无统计学意义,可以认为一次性根管治疗与多次治疗的疗效相同,临床上可以广泛应用。     

超声冲洗联合镍钛器械一次性根管治疗慢性根尖周炎的临床疗效评价

目的 对超声冲洗与镍钛机动器械联合应用于慢性根尖周炎一次性根管治疗的临床疗效进行评价。方法 对77例患者81颗牙按就诊顺序随机分为实验组和对照组。2组均采用镍钛根管预备后,实验组:43颗患牙进行超声根管冲洗,一次法完成根管充填治疗。对照组:38颗患牙进行注射器冲洗,一次法完成根管充填治疗。冲洗液均为0.9%生理盐水。观察根管充填1周后的术后疼痛反应及1年后的根管充填疗效。结果 1周后复诊2组术后疼痛反应有显著性差异(P<0.05)。术后1年复诊,2组疗效无明显差异(P>0.05)。结论 超声冲洗与镍钛器械联合应用,对于治疗慢性根尖周炎一次法完成根管充填,可减少患者复诊次数,缩短疗程,同时提高根管充填质量,值得临床推广使用。