L V Taques, J C Chidoski-Filho, B O Ávila, R T Jitumori, J C Gomes, G M Gomes
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After 1 week, the standard preparation of the canals was carried out, and the roots were divided into three groups (n=16), according to the use of different restorative techniques (control: prefabricated glass fiber post [PFP], direct anatomical glass fiber post [AFP], and CAD/CAM milled glass fiber post [MFP]). After luting procedures using Single Bond Universal and RelyX Ultimate (3M ESPE), for eight teeth in each group, six specimens were obtained (two slices from each root third: cervical, middle, and apical). For the remaining eight roots of each group, standardized preparations for metal-free crowns, milling of 5 mol% yttria-stabilized tetragonal zirconia polycrystalline, cementation of the crowns, and periodontal ligament simulation were performed. Then, for each group, the BS was evaluated through the push-out test, and the FR was evaluated in compression. The data obtained from BS were submitted to two-way analysis of variance (ANOVA; group vs root region) and Tukey (α=0.05) and from FR to one-way ANOVA (group) and Tukey (α=0.05).</p><p><strong>Results: </strong>For the BS test, the MFP group was statistically superior to the PFP group in all root regions and was statistically superior to the AFP group only in the cervical region, being statistically similar in the middle and apical root regions. For the FR test, the MFP group was statistically superior to the PFP and AFP groups.</p><p><strong>Conclusion: </strong>The milled fiber post technique can be a legitimate alternative in the restoration of weakened roots with flared root canals.</p>","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluation of Bond Strength and Fracture Load of Teeth With Flared Root Canals Restored With Prefabricated, Anatomical, and Computer-aided Design and Computer-aided Manufacturing Fiber Posts.\",\"authors\":\"L V Taques, J C Chidoski-Filho, B O Ávila, R T Jitumori, J C Gomes, G M Gomes\",\"doi\":\"10.2341/22-083-L\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>This study compared the use of anatomical glass fiber posts using bulk-fill composite resin with computer-aided design and computer-aided manufacturing (CAD/CAM) milled glass fiber post in oversized root canals, through bond strength (BS) and fracture resistance (FR) tests (fracture load).</p><p><strong>Methods and materials: </strong>A total of 48 mandibular premolars were selected, half of them had their crowns removed at the cemento-enamel junction (CEJ) and the other half were sectioned 2 mm above the CEJ. Subsequently, teeth were endodontically treated. After 1 week, the standard preparation of the canals was carried out, and the roots were divided into three groups (n=16), according to the use of different restorative techniques (control: prefabricated glass fiber post [PFP], direct anatomical glass fiber post [AFP], and CAD/CAM milled glass fiber post [MFP]). After luting procedures using Single Bond Universal and RelyX Ultimate (3M ESPE), for eight teeth in each group, six specimens were obtained (two slices from each root third: cervical, middle, and apical). For the remaining eight roots of each group, standardized preparations for metal-free crowns, milling of 5 mol% yttria-stabilized tetragonal zirconia polycrystalline, cementation of the crowns, and periodontal ligament simulation were performed. Then, for each group, the BS was evaluated through the push-out test, and the FR was evaluated in compression. The data obtained from BS were submitted to two-way analysis of variance (ANOVA; group vs root region) and Tukey (α=0.05) and from FR to one-way ANOVA (group) and Tukey (α=0.05).</p><p><strong>Results: </strong>For the BS test, the MFP group was statistically superior to the PFP group in all root regions and was statistically superior to the AFP group only in the cervical region, being statistically similar in the middle and apical root regions. 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引用次数: 0
摘要
目的:本研究通过结合强度(BS)和断裂抗力(FR)测试(断裂载荷),比较使用体积填充复合树脂的解剖玻璃纤维桩与计算机辅助设计和计算机辅助制造(CAD/CAM)的磨铣玻璃纤维桩在超大根管中的应用。方法和材料:选择48颗下颌前磨牙,其中一半在牙髓-牙釉质交界处(CEJ)取冠,另一半在CEJ上方2mm处切片。随后进行牙髓治疗。1周后进行根管标准预备,根据使用不同修复技术将根管分为三组(n=16)(对照组:预制玻璃纤维桩[PFP]、直接解剖玻璃纤维桩[AFP]和CAD/CAM磨铣玻璃纤维桩[MFP])。使用Single Bond Universal和RelyX Ultimate (3M ESPE)对每组8颗牙进行修复后,获得6个标本(每个根三分之一:颈、中、尖各2片)。对于每组剩余的8个根,进行无金属冠的标准化制备、5 mol%钇稳定的四方氧化锆多晶研磨、冠胶结和牙周韧带模拟。然后,对每组通过推出试验评估BS,并在压缩中评估FR。从BS获得的数据进行双向方差分析(ANOVA);组vs根区)和Tukey (α=0.05),从FR到单因素方差分析(组)和Tukey (α=0.05)。结果:在BS测试中,MFP组在所有根区均优于PFP组,仅在颈椎区优于AFP组,在中根区和根尖区差异有统计学意义。对于FR测试,MFP组在统计学上优于PFP和AFP组。结论:粉状纤维桩技术可作为一种合理的替代方法,用于扩展根管的弱根修复。
Evaluation of Bond Strength and Fracture Load of Teeth With Flared Root Canals Restored With Prefabricated, Anatomical, and Computer-aided Design and Computer-aided Manufacturing Fiber Posts.
Purpose: This study compared the use of anatomical glass fiber posts using bulk-fill composite resin with computer-aided design and computer-aided manufacturing (CAD/CAM) milled glass fiber post in oversized root canals, through bond strength (BS) and fracture resistance (FR) tests (fracture load).
Methods and materials: A total of 48 mandibular premolars were selected, half of them had their crowns removed at the cemento-enamel junction (CEJ) and the other half were sectioned 2 mm above the CEJ. Subsequently, teeth were endodontically treated. After 1 week, the standard preparation of the canals was carried out, and the roots were divided into three groups (n=16), according to the use of different restorative techniques (control: prefabricated glass fiber post [PFP], direct anatomical glass fiber post [AFP], and CAD/CAM milled glass fiber post [MFP]). After luting procedures using Single Bond Universal and RelyX Ultimate (3M ESPE), for eight teeth in each group, six specimens were obtained (two slices from each root third: cervical, middle, and apical). For the remaining eight roots of each group, standardized preparations for metal-free crowns, milling of 5 mol% yttria-stabilized tetragonal zirconia polycrystalline, cementation of the crowns, and periodontal ligament simulation were performed. Then, for each group, the BS was evaluated through the push-out test, and the FR was evaluated in compression. The data obtained from BS were submitted to two-way analysis of variance (ANOVA; group vs root region) and Tukey (α=0.05) and from FR to one-way ANOVA (group) and Tukey (α=0.05).
Results: For the BS test, the MFP group was statistically superior to the PFP group in all root regions and was statistically superior to the AFP group only in the cervical region, being statistically similar in the middle and apical root regions. For the FR test, the MFP group was statistically superior to the PFP and AFP groups.
Conclusion: The milled fiber post technique can be a legitimate alternative in the restoration of weakened roots with flared root canals.
期刊介绍:
Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts.
One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use.
The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity