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Erschienen in: Clinical Oral Investigations 2/2015

01.03.2015 | Original Article

Supplementary sampling of obturation materials enhances microbial analysis of endodontic treatment failures: a proof of principle study

verfasst von: L. Karygianni, A. C. Anderson, C. Tennert, K. Kollmar, M. J. Altenburger, E. Hellwig, A. Al-Ahmad

Erschienen in: Clinical Oral Investigations | Ausgabe 2/2015

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Abstract

Objectives

Root canal treatment failures often correlate with persistent biomaterial-associated endodontic infections. The aim of the present study was to assess the impact of endodontic obturation material sampling from root canals with posttreatment apical periodontitis on improving standard study protocols.

Materials and methods

Samples from previously filled root canals and their corresponding endodontic filling materials were obtained from five root-filled teeth with posttreatment periradicular lesions. After cultivation, the isolated microorganisms were quantified and biochemically identified. Moreover, clone libraries were constructed after the amplification of bacterial 16S ribosomal DNA (rDNA) from the same samples. DNA from selected clones was sequenced to identify microbial species. Transmission electron microscopy (TEM) aided visualization of the detected bacteria.

Results

Overall, 22 taxa of the phyla Firmicutes, Actinobacteria, and Bacteroidetes were detected in both obturation and root canal samples by culture-dependent and culture-independent methods. Root canal fillings sheltered 17 species (3.30–7.50 × 103 CFU/ml). Of these, nine were detected solely in the retrieved obturation materials. The reinfected root canals harbored 13 taxa (3.48–7.36 × 103 CFU/ml). Obligate and facultative anaerobic bacteria prevailed. The number of different species ranged from 1 to 5 within a single sample. Fungi were not detected.

Conclusions

Bacteria can colonize both root canals and endodontic fillings in vivo.

Clinical relevance

Integrating the sampling of obturation materials with standard root canal sample collection offers a clearer insight into the actual microbial flora of reinfected root canals and improves the study protocols of secondary/persistent endodontic infections.
Literatur
1.
Zurück zum Zitat Siqueira JF Jr, Rôças IN (2005) Uncultivated phylotypes and newly named species associated with primary and persistent endodontic infections. J Clin Microbiol 43:3314–3319CrossRefPubMedCentralPubMed Siqueira JF Jr, Rôças IN (2005) Uncultivated phylotypes and newly named species associated with primary and persistent endodontic infections. J Clin Microbiol 43:3314–3319CrossRefPubMedCentralPubMed
2.
Zurück zum Zitat Rôças IN, Siqueira JF Jr (2012) Characterization of microbiota of root canal-treated teeth with posttreatment disease. J Clin Microbiol 50:1721–1724CrossRefPubMedCentralPubMed Rôças IN, Siqueira JF Jr (2012) Characterization of microbiota of root canal-treated teeth with posttreatment disease. J Clin Microbiol 50:1721–1724CrossRefPubMedCentralPubMed
3.
Zurück zum Zitat Cheung GS, Ho MW (2001) Microbial flora of root canal-treated teeth associated with asymptomatic periapical radiolucent lesions. Oral Microbiol Immunol 16:332–337CrossRefPubMed Cheung GS, Ho MW (2001) Microbial flora of root canal-treated teeth associated with asymptomatic periapical radiolucent lesions. Oral Microbiol Immunol 16:332–337CrossRefPubMed
4.
Zurück zum Zitat Rocas IN, Jung IY, Lee CY, Siqueira JF Jr (2004) Polymerase chain reaction identification of microorganisms in previously root-filled teeth in a South Korean population. J Endod 30:504–508CrossRefPubMed Rocas IN, Jung IY, Lee CY, Siqueira JF Jr (2004) Polymerase chain reaction identification of microorganisms in previously root-filled teeth in a South Korean population. J Endod 30:504–508CrossRefPubMed
5.
Zurück zum Zitat Siqueira JF Jr, Rocas IN (2004) Polymerase chain reaction-based analysis of microorganisms associated with failed endodontic treatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 97:85–94CrossRefPubMed Siqueira JF Jr, Rocas IN (2004) Polymerase chain reaction-based analysis of microorganisms associated with failed endodontic treatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 97:85–94CrossRefPubMed
6.
Zurück zum Zitat Anderson AC, Hellwig E, Vespermann R, Wittmer A, Schmid M, Karygianni L, Al-Ahmad A (2012) Comprehensive analysis of secondary dental root canal infections: a combination of culture and culture-independent approaches reveals new insights. PLoS One 7:e49576CrossRefPubMedCentralPubMed Anderson AC, Hellwig E, Vespermann R, Wittmer A, Schmid M, Karygianni L, Al-Ahmad A (2012) Comprehensive analysis of secondary dental root canal infections: a combination of culture and culture-independent approaches reveals new insights. PLoS One 7:e49576CrossRefPubMedCentralPubMed
7.
Zurück zum Zitat Pinheiro ET, Gomes BP, Ferraz CC, Sousa EL, Teixeira FB, Souza-Filho FJ (2003) Microorganisms from canals of root-filled teeth with periapical lesions. Int Endod J 36:1–11CrossRefPubMed Pinheiro ET, Gomes BP, Ferraz CC, Sousa EL, Teixeira FB, Souza-Filho FJ (2003) Microorganisms from canals of root-filled teeth with periapical lesions. Int Endod J 36:1–11CrossRefPubMed
8.
Zurück zum Zitat Siqueira JF Jr, Rôças IN, Paiva SS, Magalhães KM, Guimarães-Pinto T (2007) Cultivable bacteria in infected root canals as identified by 16S rRNA gene sequencing. Oral Microbiol Immunol 22:266–271CrossRefPubMed Siqueira JF Jr, Rôças IN, Paiva SS, Magalhães KM, Guimarães-Pinto T (2007) Cultivable bacteria in infected root canals as identified by 16S rRNA gene sequencing. Oral Microbiol Immunol 22:266–271CrossRefPubMed
9.
Zurück zum Zitat Rolph HJ, Lennon A, Riggio MP, Saunders WP, MacKenzie D et al (2001) Molecular identification of microorganisms from endodontic infections. J Clin Microbiol 39:3282–3289CrossRefPubMedCentralPubMed Rolph HJ, Lennon A, Riggio MP, Saunders WP, MacKenzie D et al (2001) Molecular identification of microorganisms from endodontic infections. J Clin Microbiol 39:3282–3289CrossRefPubMedCentralPubMed
10.
Zurück zum Zitat Young G, Turner S, Davies JK, Sundqvist G, Figdor D (2007) Bacterial DNA persists for extended periods after cell death. J Endod 33:1417–1420CrossRefPubMed Young G, Turner S, Davies JK, Sundqvist G, Figdor D (2007) Bacterial DNA persists for extended periods after cell death. J Endod 33:1417–1420CrossRefPubMed
11.
Zurück zum Zitat Sakamoto SM, Siqueira JF Jr, Rocas IN, Benno Y (2008) Molecular analysis of the root canal microbiota associated with endodontic treatment failures. Oral Microbiol Immunol 23:275–281CrossRefPubMed Sakamoto SM, Siqueira JF Jr, Rocas IN, Benno Y (2008) Molecular analysis of the root canal microbiota associated with endodontic treatment failures. Oral Microbiol Immunol 23:275–281CrossRefPubMed
12.
Zurück zum Zitat Subramanian K, Mickel A (2009) Molecular analysis of persistent periradicular lesions and root ends reveals a diverse microbial profile. J Endod 35:950–957CrossRefPubMed Subramanian K, Mickel A (2009) Molecular analysis of persistent periradicular lesions and root ends reveals a diverse microbial profile. J Endod 35:950–957CrossRefPubMed
13.
Zurück zum Zitat Paiva SS, Siqueira JF Jr, Rôças IN, Carmo FL, Leite DC, Ferreira DC, Rachid CT, Rosado AS (2013) Molecular microbiological evaluation of passive ultrasonic activation as a supplementary disinfecting step: a clinical study. J Endod 39:190–194CrossRefPubMed Paiva SS, Siqueira JF Jr, Rôças IN, Carmo FL, Leite DC, Ferreira DC, Rachid CT, Rosado AS (2013) Molecular microbiological evaluation of passive ultrasonic activation as a supplementary disinfecting step: a clinical study. J Endod 39:190–194CrossRefPubMed
14.
Zurück zum Zitat Sundqvist G, Figdor D, Persson S, Sjogren U (1998) Microbiologic analysis of teeth with failed endodontic treatment and the outcome of conservative retreatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 85:86–93CrossRefPubMed Sundqvist G, Figdor D, Persson S, Sjogren U (1998) Microbiologic analysis of teeth with failed endodontic treatment and the outcome of conservative retreatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 85:86–93CrossRefPubMed
15.
Zurück zum Zitat Senges C, Wrbas KT, Altenburger M, Follo M, Spitzmüller B, Wittmer A, Hellwig E, Al-Ahmad A (2011) Bacterial and Candida albicans adhesion on different root canal filling materials and sealers. J Endod 37:1247–1252CrossRefPubMed Senges C, Wrbas KT, Altenburger M, Follo M, Spitzmüller B, Wittmer A, Hellwig E, Al-Ahmad A (2011) Bacterial and Candida albicans adhesion on different root canal filling materials and sealers. J Endod 37:1247–1252CrossRefPubMed
16.
Zurück zum Zitat George S, Basrani B, Kishen A (2010) Possibilities of gutta-percha-centered infection in endodontically treated teeth: an in vitro study. J Endod 36:1241–1244CrossRefPubMed George S, Basrani B, Kishen A (2010) Possibilities of gutta-percha-centered infection in endodontically treated teeth: an in vitro study. J Endod 36:1241–1244CrossRefPubMed
17.
Zurück zum Zitat Love RM (2002) The effect of tissue molecules on bacterial invasion of dentine. Oral Microbiol Immunol 17:32–37CrossRefPubMed Love RM (2002) The effect of tissue molecules on bacterial invasion of dentine. Oral Microbiol Immunol 17:32–37CrossRefPubMed
18.
Zurück zum Zitat Takemura N, Noiri Y, Ehara A, Kawahara T, Noguchi N, Ebisu S (2004) Single species biofilm-forming ability of root canal isolates on gutta-percha points. Eur J Oral Sci 112:523–529CrossRefPubMed Takemura N, Noiri Y, Ehara A, Kawahara T, Noguchi N, Ebisu S (2004) Single species biofilm-forming ability of root canal isolates on gutta-percha points. Eur J Oral Sci 112:523–529CrossRefPubMed
19.
Zurück zum Zitat Nawal RR, Parande M, Sehgal R, Rao NR, Naik A (2011) A comparative evaluation of 3 root canal filling systems. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 111:387–393CrossRefPubMed Nawal RR, Parande M, Sehgal R, Rao NR, Naik A (2011) A comparative evaluation of 3 root canal filling systems. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 111:387–393CrossRefPubMed
20.
Zurück zum Zitat Gomes BP, Vianna ME, Matsumoto CU, Rossi Vde P, Zaia AA, Ferraz CC, Souza Filho FJ (2005) Disinfection of gutta-percha cones with chlorhexidine and sodium hypochlorite. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 100:512–517CrossRefPubMed Gomes BP, Vianna ME, Matsumoto CU, Rossi Vde P, Zaia AA, Ferraz CC, Souza Filho FJ (2005) Disinfection of gutta-percha cones with chlorhexidine and sodium hypochlorite. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 100:512–517CrossRefPubMed
21.
Zurück zum Zitat Farzaneh M, Abitbol S, Friedman S (2004) Treatment outcome in endodontics: the Toronto study. Phases I and II: Orthograde retreatment. J Endod 30:627–633CrossRefPubMed Farzaneh M, Abitbol S, Friedman S (2004) Treatment outcome in endodontics: the Toronto study. Phases I and II: Orthograde retreatment. J Endod 30:627–633CrossRefPubMed
22.
Zurück zum Zitat Schirrmeister JF, Liebenow AL, Braun G, Wittmer A, Hellwig E et al (2007) Detection and eradication of microorganisms in root-filled teeth associated with periradicular lesions: an in vivo study. J Endod 33:536–540CrossRefPubMed Schirrmeister JF, Liebenow AL, Braun G, Wittmer A, Hellwig E et al (2007) Detection and eradication of microorganisms in root-filled teeth associated with periradicular lesions: an in vivo study. J Endod 33:536–540CrossRefPubMed
23.
Zurück zum Zitat Schirrmeister JF, Liebenow AL, Pelz K, Wittmer A, Serr A et al (2009) New bacterial compositions in root-filled teeth with periradicular lesions. J Endod 35:169–174CrossRefPubMed Schirrmeister JF, Liebenow AL, Pelz K, Wittmer A, Serr A et al (2009) New bacterial compositions in root-filled teeth with periradicular lesions. J Endod 35:169–174CrossRefPubMed
24.
Zurück zum Zitat Frank JA, Reich CL, Sharma S, Weisbaum JS, Wilson BA et al (2008) Critical evaluation of two primers commonly used for amplification of bacterial 16S rRNA genes. Appl Environ Microbiol 74:2461–2470CrossRefPubMedCentralPubMed Frank JA, Reich CL, Sharma S, Weisbaum JS, Wilson BA et al (2008) Critical evaluation of two primers commonly used for amplification of bacterial 16S rRNA genes. Appl Environ Microbiol 74:2461–2470CrossRefPubMedCentralPubMed
25.
Zurück zum Zitat Vianna ME, Conrads G, Gomes BPFA, Horz HP (2006) Identification and quantification of archaea involved in primary endodontic infections. J Clin Microbiol 44:1274–1282CrossRefPubMedCentralPubMed Vianna ME, Conrads G, Gomes BPFA, Horz HP (2006) Identification and quantification of archaea involved in primary endodontic infections. J Clin Microbiol 44:1274–1282CrossRefPubMedCentralPubMed
26.
Zurück zum Zitat Gardes M, Bruns TD (1993) ITSprimers with enhanced specificity for basidiomycetes — application to the identification of mycorrhizae and rusts. Mol Ecol 2:113–118CrossRefPubMed Gardes M, Bruns TD (1993) ITSprimers with enhanced specificity for basidiomycetes — application to the identification of mycorrhizae and rusts. Mol Ecol 2:113–118CrossRefPubMed
27.
Zurück zum Zitat Altschul SF, Madden TL, Schäffer AA, Zhang J, Zhang Z et al (1997) Gapped BLAST and PSI-BLAST: a new generation of protein database search programs. Nucleic Acids Res 25:3389–3402CrossRefPubMedCentralPubMed Altschul SF, Madden TL, Schäffer AA, Zhang J, Zhang Z et al (1997) Gapped BLAST and PSI-BLAST: a new generation of protein database search programs. Nucleic Acids Res 25:3389–3402CrossRefPubMedCentralPubMed
28.
Zurück zum Zitat Ashelford KE, Chuzhanova NA, Fry JC, Jones AJ, Weightman AJ (2005) At least 1 in 20 16S rRNA sequence records currently held in public repositories is estimated to contain substantial anomalies. Appl Environ Microbiol 71:7724–7736CrossRefPubMedCentralPubMed Ashelford KE, Chuzhanova NA, Fry JC, Jones AJ, Weightman AJ (2005) At least 1 in 20 16S rRNA sequence records currently held in public repositories is estimated to contain substantial anomalies. Appl Environ Microbiol 71:7724–7736CrossRefPubMedCentralPubMed
29.
Zurück zum Zitat Hall TA (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symp Ser 41:95–98 Hall TA (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symp Ser 41:95–98
30.
Zurück zum Zitat Cole JR, Wang Q, Cardenas E, Fish J, Chai B et al (2009) The ribosomal database project: improved alignments and new tools for rRNA analysis. Nucleic Acids Res (Database issue) 37:D141–D145CrossRef Cole JR, Wang Q, Cardenas E, Fish J, Chai B et al (2009) The ribosomal database project: improved alignments and new tools for rRNA analysis. Nucleic Acids Res (Database issue) 37:D141–D145CrossRef
31.
Zurück zum Zitat Chen T, Yu WH, Izard J, Baranova OV, Lakshmanan A, Dewhirst FE (2010) The human oral microbiome database: a web accessible resource for investigating oral microbe taxonomic and genomic information. Database (Oxford) Jul 6;2010:baq013 Chen T, Yu WH, Izard J, Baranova OV, Lakshmanan A, Dewhirst FE (2010) The human oral microbiome database: a web accessible resource for investigating oral microbe taxonomic and genomic information. Database (Oxford) Jul 6;2010:baq013
32.
Zurück zum Zitat Wahab R, Mishra A, Yun SI, Kim YS, Shin HS (2010) Antibacterial activity of ZnO nanoparticles prepared via non-hydrolytic solution route. Appl Microbiol Biotechnol 87:1917–1925CrossRefPubMed Wahab R, Mishra A, Yun SI, Kim YS, Shin HS (2010) Antibacterial activity of ZnO nanoparticles prepared via non-hydrolytic solution route. Appl Microbiol Biotechnol 87:1917–1925CrossRefPubMed
33.
Zurück zum Zitat Hirai VH, da Silva Neto UX, Westphalen VP, Perin CP, Carneiro E, Fariniuk LF (2010) Comparative analysis of leakage in root canal fillings performed with gutta-percha and resilon cones with AH plus and epiphany sealers. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 109:e131–e135CrossRefPubMed Hirai VH, da Silva Neto UX, Westphalen VP, Perin CP, Carneiro E, Fariniuk LF (2010) Comparative analysis of leakage in root canal fillings performed with gutta-percha and resilon cones with AH plus and epiphany sealers. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 109:e131–e135CrossRefPubMed
34.
Zurück zum Zitat Teixeira CS, Alfredo E, Thomé LH, Gariba-Silva R, Silva-Sousa YT, Sousa-Neto MD (2009) Adhesion of an endodontic sealer to dentin and gutta-percha: shear and push-out bond strength measurements and SEM analysis. J Appl Oral Sci 17:129–135CrossRefPubMed Teixeira CS, Alfredo E, Thomé LH, Gariba-Silva R, Silva-Sousa YT, Sousa-Neto MD (2009) Adhesion of an endodontic sealer to dentin and gutta-percha: shear and push-out bond strength measurements and SEM analysis. J Appl Oral Sci 17:129–135CrossRefPubMed
35.
Zurück zum Zitat Shokati B, Tam LE, Santerre JP, Finer Y (2010) Effect of salivary esterase on the integrity and fracture toughness of the dentin–resin interface. J Biomed Mater Res B Appl Biomater 94:230–237PubMed Shokati B, Tam LE, Santerre JP, Finer Y (2010) Effect of salivary esterase on the integrity and fracture toughness of the dentin–resin interface. J Biomed Mater Res B Appl Biomater 94:230–237PubMed
36.
Zurück zum Zitat Roth KA, Friedman S, Lévesque CM, Basrani BR, Finer Y (2012) Microbial biofilm proliferation within sealer-root dentin interfaces is affected by sealer type and aging period. J Endod 38:1253–1256CrossRefPubMedCentralPubMed Roth KA, Friedman S, Lévesque CM, Basrani BR, Finer Y (2012) Microbial biofilm proliferation within sealer-root dentin interfaces is affected by sealer type and aging period. J Endod 38:1253–1256CrossRefPubMedCentralPubMed
37.
Zurück zum Zitat Hashimoto M (2010) A review—micromorphological evidence of degradation in resin–dentin bonds and potential preventional solutions. J Biomed Mater Res B Appl Biomater 92:268–280CrossRefPubMed Hashimoto M (2010) A review—micromorphological evidence of degradation in resin–dentin bonds and potential preventional solutions. J Biomed Mater Res B Appl Biomater 92:268–280CrossRefPubMed
38.
Zurück zum Zitat Richardson N, Mordan NJ, Figueiredo JA, Ng YL, Gulabivala K (2009) Microflora in teeth associated with apical periodontitis: a methodological observational study comparing two protocols and three microscopy techniques. Int Endod J 42:908–921CrossRefPubMed Richardson N, Mordan NJ, Figueiredo JA, Ng YL, Gulabivala K (2009) Microflora in teeth associated with apical periodontitis: a methodological observational study comparing two protocols and three microscopy techniques. Int Endod J 42:908–921CrossRefPubMed
39.
Zurück zum Zitat Pinheiro ET, Gomes BP, Ferraz CC, Teixeira FB, Zaia AA et al (2003) Evaluation of root canal microorganisms isolated from teeth with endodontic failure and their antimicrobial susceptibility. Oral Microbiol Immunol 18:100–103CrossRefPubMed Pinheiro ET, Gomes BP, Ferraz CC, Teixeira FB, Zaia AA et al (2003) Evaluation of root canal microorganisms isolated from teeth with endodontic failure and their antimicrobial susceptibility. Oral Microbiol Immunol 18:100–103CrossRefPubMed
40.
Zurück zum Zitat Nagy E, Urbán E, Becker S, Kostrzewa M, Vörös A, Hunyadkürti J, Nagy I (2013) MALDI-TOF MS fingerprinting facilitates rapid discrimination of phylotypes I, II and III of Propionibacterium acnes. Anaerobe 20:20–26CrossRefPubMed Nagy E, Urbán E, Becker S, Kostrzewa M, Vörös A, Hunyadkürti J, Nagy I (2013) MALDI-TOF MS fingerprinting facilitates rapid discrimination of phylotypes I, II and III of Propionibacterium acnes. Anaerobe 20:20–26CrossRefPubMed
41.
Zurück zum Zitat Borgo F, Ferrario C, Ricci G, Fortina MG (2013) Genotypic intraspecies heterogeneity of Enterococcus italicus: data from dairy environments. J Basic Microbiol 53:20–28CrossRefPubMed Borgo F, Ferrario C, Ricci G, Fortina MG (2013) Genotypic intraspecies heterogeneity of Enterococcus italicus: data from dairy environments. J Basic Microbiol 53:20–28CrossRefPubMed
42.
Zurück zum Zitat Linares DM, Del Río B, Ladero V, Redruello B, Martín MC, Fernández M, Alvarez MA (2013) The putrescine biosynthesis pathway in Lactococcus lactis is transcriptionally regulated by carbon catabolic repression, mediated by CcpA. Int J Food Microbiol 165:43–50CrossRefPubMed Linares DM, Del Río B, Ladero V, Redruello B, Martín MC, Fernández M, Alvarez MA (2013) The putrescine biosynthesis pathway in Lactococcus lactis is transcriptionally regulated by carbon catabolic repression, mediated by CcpA. Int J Food Microbiol 165:43–50CrossRefPubMed
43.
Zurück zum Zitat Noiri Y, Ehara A, Kawahara T, Takemura N, Ebisu S (2002) Participation of bacterial biofilms in refractory and chronic periapical periodontitis. J Endod 28:679–683CrossRefPubMed Noiri Y, Ehara A, Kawahara T, Takemura N, Ebisu S (2002) Participation of bacterial biofilms in refractory and chronic periapical periodontitis. J Endod 28:679–683CrossRefPubMed
44.
Zurück zum Zitat Nambu T, Yamane K, Yamanaka T, Mashimo C, Maruyama H, Yoshida M, Hayashi H, Leung KP, Fukushima H (2013) Identification of disulphide stress-responsive extracytoplasmic function sigma factors in Rothia mucilaginosa. Arch Oral Biol 58:681–689CrossRefPubMed Nambu T, Yamane K, Yamanaka T, Mashimo C, Maruyama H, Yoshida M, Hayashi H, Leung KP, Fukushima H (2013) Identification of disulphide stress-responsive extracytoplasmic function sigma factors in Rothia mucilaginosa. Arch Oral Biol 58:681–689CrossRefPubMed
45.
Zurück zum Zitat Kermanshahi S, Santerre JP, Cvitkovitch DG, Finer Y (2010) Biodegradation of resin–dentin interfaces increases bacterial microleakage. J Dent Res 89:996–1001CrossRefPubMedCentralPubMed Kermanshahi S, Santerre JP, Cvitkovitch DG, Finer Y (2010) Biodegradation of resin–dentin interfaces increases bacterial microleakage. J Dent Res 89:996–1001CrossRefPubMedCentralPubMed
Metadaten
Titel
Supplementary sampling of obturation materials enhances microbial analysis of endodontic treatment failures: a proof of principle study
verfasst von
L. Karygianni
A. C. Anderson
C. Tennert
K. Kollmar
M. J. Altenburger
E. Hellwig
A. Al-Ahmad
Publikationsdatum
01.03.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Clinical Oral Investigations / Ausgabe 2/2015
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-014-1231-4

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