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  • Original Article Prospective clinical evaluation of three different bonding systems in class V resin restorations with or without mechanical retention
    Kyung-Wook Lee1, Sae-Joon Choung1, Young-Chul Han1, Ho-Hyun Son1,2, Chung-Moon Um1,2, Myoung-Hwan Oh3, Byeong-Hoon Cho1,2orcid
    2006;31(4):-311.
    DOI: https://doi.org/10.5395/JKACD.2006.31.4.300
    Published online: July 31, 2006

    1Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.

    2Dental Research Institute, Seoul National University, Seoul, Korea.

    3Vericom R&D Center, Anyang, Korea.

    Corresponding Author: Byeong-Hoon Cho. Dept. of Conservative Dentistry, School of Dentistry, and Dental Research Institute, Seoul National Univ., 28-2 Yeongun-dong, Chongro-gu, Seoul, Korea 110-749. Tel: +82-2-2072-3514, Fax: +82-2-764-3514, chobh@snu.ac.kr
    • Received: January 14, 2006   • Revised: February 17, 2005   • Accepted: March 24, 2006

    Copyright © 2006 Korean Academy of Conservative Dentistry

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    • 1 Crossref
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    • The purpose of this study is to evaluate prospectively the effect of different bonding systems and retention grooves on the clinical performance of resin restorations in non-carious cervical lesions (NCCLs). Thirty-nine healthy adults who had at least 2 NCCLs in their premolar areas were included in this study. One hundred and fifty teeth were equally assigned to six groups: (A) Scotchbond Multi-Purpose (SBMP, 3M ESPE, St. Paul, MN, USA, 4th generation bonding system) without retention grooves; (B) SBMP with retention grooves; (C) BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5th generation bonding system) without retention grooves; (D) BC Plus with retention grooves; (E) Adper Prompt (3M ESPE, Seefeld, Germany, 6th generation bonding system) without retention grooves; (F) Adper Prompt with retention grooves. All cavities were filled with a hybrid composite resin, Denfil (Vericom Co., Anyang, Gyeonggido, Korea) by one operator. Restorations were evaluated at baseline and at 6-month recall, according to the modified USPHS (United States Public Health Service) criteria. Additionally, clinical photographs were taken and epoxy resin replicas were made for SEM evaluation. At 6-month recall, there were some differences in the number of alpha ratings among the experimental groups. But, despite the differences in the number of alpha ratings, there was no significant difference among the 3 adhesive systems (p > 0.05). There was also no significant difference between the groups with or without mechanical retention (p > 0.05). Follow-ups for longer periods than 6 months are needed to verify the clinical performance of different bonding systems and retention grooves.
    Figure 1
    Cavity preparation of experimental tooth.
    jkacd-31-300-g001.jpg
    Figure 2
    Deterioration of the restorations - An example of "marginal discoloration" observed in group E (Adper Prompt, no retention groove), (A) baseline, (B) 6-month recall.
    jkacd-31-300-g002.jpg
    Figure 3
    Scanning electron micrographs of the interface between tooth and restoration - An example of marginal breakdown observed in group E (Adper Prompt, no retention groove), (A) baseline: continuous margin is observed, (B) 6-month recall: breakdown of incisal margin is observed (arrow), (C) higher magnification of the area pointed by arrow in Figure 3-(B).
    jkacd-31-300-g003.jpg
    Table 1
    Design of experimental groups (Number of teeth in each group = 25)
    jkacd-31-300-i001.jpg
    Table 2
    Bonding procedures in each group
    jkacd-31-300-i002.jpg
    Table 3
    Modified USPHS criteria used for the clinical evaluation
    jkacd-31-300-i003.jpg
    Table 4
    Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    jkacd-31-300-i004.jpg
    Table 5
    Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    jkacd-31-300-i005.jpg
    Table 6
    Marginal discoloration & marginal adaptation at 6-month recall
    jkacd-31-300-i006.jpg

    This work was supported by a grant from the Ministry of Health and Welfare of Korea (Grant No. 03-PJ1-PG1-CH09-0001).

    Figure 1
    Cavity preparation of experimental tooth.
    jkacd-31-300-g001.jpg
    Figure 2
    Deterioration of the restorations - An example of "marginal discoloration" observed in group E (Adper Prompt, no retention groove), (A) baseline, (B) 6-month recall.
    jkacd-31-300-g002.jpg
    Figure 3
    Scanning electron micrographs of the interface between tooth and restoration - An example of marginal breakdown observed in group E (Adper Prompt, no retention groove), (A) baseline: continuous margin is observed, (B) 6-month recall: breakdown of incisal margin is observed (arrow), (C) higher magnification of the area pointed by arrow in Figure 3-(B).
    jkacd-31-300-g003.jpg
    Table 1
    Design of experimental groups (Number of teeth in each group = 25)
    jkacd-31-300-i001.jpg
    Table 2
    Bonding procedures in each group
    jkacd-31-300-i002.jpg
    Table 3
    Modified USPHS criteria used for the clinical evaluation
    jkacd-31-300-i003.jpg
    Table 4
    Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    jkacd-31-300-i004.jpg
    Table 5
    Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    jkacd-31-300-i005.jpg
    Table 6
    Marginal discoloration & marginal adaptation at 6-month recall
    jkacd-31-300-i006.jpg
    • 1. Browning WD, Brackett WW, Gilpatrick RO. Retention of microfilled and hybrid resin-based composite in noncarious Class 5 lesions: a double-blind, randomized clinical trial. Oper Dent. 1999;24: 26-30.PubMed
    • 2. Levitch LC, Bader JD, Shugars DA, Heymann HO. Non-carious cervical lesions. J Dent. 1994;22: 195-207.ArticlePubMed
    • 3. Bader JD, Levitch LC, Shugars DA, Heymann HO, McClure F. How dentists classified and treated non-carious cervical lesions. J Am Dent Assoc. 1993;124: 46-54.ArticlePubMed
    • 4. Mjor IA, Shen C, Eliasson ST, Richter S. Placement and replacement of restorations in general dental practice in Iceland. Oper Dent. 2002;27: 117-123.PubMed
    • 5. Smales RJ, Webster DA. Restoration deterioration related to later failure. Oper Dent. 1993;18: 130-137.PubMed
    • 6. Smales RJ, Gerke DC. Clinical evaluation of light-cured anterior resin composites over periods of up to 4 years. Am J Dent. 1992;5: 208-212.PubMed
    • 7. Hickel R, Manhart J. Longevity of restorations in posterior teeth and reasons for failure. J Adhes Dent. 2001;3: 45-64.PubMed
    • 8. Summitt JB, Robbins JW, Schwartz RS. Fundamentals of Operative Dentistry: A Contemporary Approach. 2001;ed 2. Illinois: Quintessence Publishing; 396.
    • 9. Inoue S, Vargas MA, Abe Y, Yoshida Y, Lambrechts P, Vanherle G, Sano H, Van Meerbeek B. Microtensile bond strength of eleven contemporary adhesives to dentin. J Adhes Dent. 2001;3: 237-245.PubMed
    • 10. Inoue S, Vargas MA, Abe Y, Yoshida Y, Lambrechts P, Vanherle G, Sano H, Van Meerbeek B. Microtensile bond strength of eleven contemporary adhesives to enamel. Am J Dent. 2003;16: 329-334.PubMed
    • 11. Agostini FG, Kaaden C, Powers JM. Bond strength of self-etching primers to enamel and dentin of primary teeth. Pediatr Dent. 2001;23: 481-486.PubMed
    • 12. Kanemura N, Sano H, Tagami J. Tensile bond strength to and SEM evaluation of ground and intact enamel surfaces. J Dent. 1999;27: 523-530.ArticlePubMed
    • 13. Tay FR, Pashley DH, Suh BI, Carvalho RM, Itthagarun A. Single-step adhesives are permeable membranes. J Dent. 2002;30: 371-382.ArticlePubMed
    • 14. Borcic J, Anic I, Smojver I, Catic A, Miletic I, Ribaric SP. 3D finite element model and cervical lesion formation in normal occlusion and in malocclusion. J Oral Rehabil. 2005;32: 504-510.ArticlePubMed
    • 15. Tanaka M, Naito T, Yokota M, Kohno M. Finite element analysis of the possible mechanism of cervical lesion formation by occlusal force. J Oral Rehabil. 2003;30: 60-67.ArticlePubMedPDF
    • 16. McCoy RB, Anderson MH, Lepe X, Johnson GH. Clinical success of class V composite resin restorations without mechanical retention. J Am Dent Assoc. 1998;129: 593-599.ArticlePubMed
    • 17. Pashley DH, Sano H, Ciucchi B, Yoshiyama M, Carvalho RM. Adhesion testing of dentin bonding agents: a review. Dent Mater. 1995;11: 117-125.ArticlePubMed
    • 18. Hashimoto M, Ohno H, Kaga M, Endo K, Sano H, Oguchi H. In vivo degradation of resin-dentin bonds in humans over 1 to 3 years. J Dent Res. 2000;79: 1385-1391.ArticlePubMedPDF
    • 19. Wucher M, Grobler SR, Senekal PJ. A 3-year clinical evaluation of a compomer, a composite and a compomer/composite (sandwich) in class II restorations. Am J Dent. 2002;15: 274-278.PubMed
    • 20. Gordan VV, Mjor IA, Vazquez O, Watson RE, Wilson N. two-year clinical evaluation. J Esthet Restor Dent. 2002;14: 296-302.ArticlePubMed
    • 21. Ryge G, Snyder M. Evaluating the clinical quality of restorations. J Am Dent Assoc. 1973;87: 369-377.ArticlePubMed
    • 22. Pashley EL, Agee KA, Pashley DH, Tay FR. Effects of one versus two applications of an unfilled, all-in-one adhesive on dentine bonding. J Dent. 2002;30: 83-90.ArticlePubMed
    • 23. Uno S, Abo T, Tanaka T, Sano H. In vitro sealing performance of two one-step adhesive systems in cervical cavities. J Adhes Dent. 2004;6: 211-219.PubMed
    • 24. Yoshida E, Uno S. Voids formation along the bonding interface between a smeared dentin surface and all-in-one adhesives. Dent Mater J. 2004;23: 643-649.ArticlePubMed
    • 25. Tay FR, Pashley DH, Garcia-Godoy F, Yiu CK. Single-step, self-etch adhesives behave as permeable membranes after polymerization. Part II. Silver tracer penetration evidence. Am J Dent. 2004;17: 315-322.PubMed
    • 26. Perdigao J, Carmo AR, Anauate-Netto C, Amore R, Lewgoy HR, Cordeiro HJ, Dutra-Correa M, Castilhos N. Clinical performance of a self-etching adhesive at 18 months. Am J Dent. 2005;18: 135-140.PubMed
    • 27. Duke ES, Robbins JW, Snyder DS. Clinical evaluation of a dentinal adhesive system: three-year results. Quintessence Int. 1991;22: 889-895.PubMed
    • 28. Duke ES, Lindemuth J. Variability of clinical dentin substrates. Am J Dent. 1991;4: 241-246.PubMed
    • 29. Gwinnett AJ, Kanca J 3rd. Interfacial morphology of resin composite and shiny erosion lesions. Am J Dent. 1992;5: 315-317.PubMed
    • 30. Tilliss TS, Keating JG. Understanding and managing dentin hypersensitivity. J Dent Hyg. 2002;76: 296-310.PubMed

    Tables & Figures

    Figure 1
    Cavity preparation of experimental tooth.
    jkacd-31-300-g001.jpg
    Figure 2
    Deterioration of the restorations - An example of "marginal discoloration" observed in group E (Adper Prompt, no retention groove), (A) baseline, (B) 6-month recall.
    jkacd-31-300-g002.jpg
    Figure 3
    Scanning electron micrographs of the interface between tooth and restoration - An example of marginal breakdown observed in group E (Adper Prompt, no retention groove), (A) baseline: continuous margin is observed, (B) 6-month recall: breakdown of incisal margin is observed (arrow), (C) higher magnification of the area pointed by arrow in Figure 3-(B).
    jkacd-31-300-g003.jpg
    Table 1
    Design of experimental groups (Number of teeth in each group = 25)
    jkacd-31-300-i001.jpg
    Table 2
    Bonding procedures in each group
    jkacd-31-300-i002.jpg
    Table 3
    Modified USPHS criteria used for the clinical evaluation
    jkacd-31-300-i003.jpg
    Table 4
    Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    jkacd-31-300-i004.jpg
    Table 5
    Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    jkacd-31-300-i005.jpg
    Table 6
    Marginal discoloration & marginal adaptation at 6-month recall
    jkacd-31-300-i006.jpg
    Figure 1
    Cavity preparation of experimental tooth.
    jkacd-31-300-g001.jpg
    Figure 2
    Deterioration of the restorations - An example of "marginal discoloration" observed in group E (Adper Prompt, no retention groove), (A) baseline, (B) 6-month recall.
    jkacd-31-300-g002.jpg
    Figure 3
    Scanning electron micrographs of the interface between tooth and restoration - An example of marginal breakdown observed in group E (Adper Prompt, no retention groove), (A) baseline: continuous margin is observed, (B) 6-month recall: breakdown of incisal margin is observed (arrow), (C) higher magnification of the area pointed by arrow in Figure 3-(B).
    jkacd-31-300-g003.jpg
    Table 1
    Design of experimental groups (Number of teeth in each group = 25)
    jkacd-31-300-i001.jpg
    Table 2
    Bonding procedures in each group
    jkacd-31-300-i002.jpg
    Table 3
    Modified USPHS criteria used for the clinical evaluation
    jkacd-31-300-i003.jpg
    Table 4
    Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    jkacd-31-300-i004.jpg
    Table 5
    Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    jkacd-31-300-i005.jpg
    Table 6
    Marginal discoloration & marginal adaptation at 6-month recall
    jkacd-31-300-i006.jpg

    REFERENCES

    • 1. Browning WD, Brackett WW, Gilpatrick RO. Retention of microfilled and hybrid resin-based composite in noncarious Class 5 lesions: a double-blind, randomized clinical trial. Oper Dent. 1999;24: 26-30.PubMed
    • 2. Levitch LC, Bader JD, Shugars DA, Heymann HO. Non-carious cervical lesions. J Dent. 1994;22: 195-207.ArticlePubMed
    • 3. Bader JD, Levitch LC, Shugars DA, Heymann HO, McClure F. How dentists classified and treated non-carious cervical lesions. J Am Dent Assoc. 1993;124: 46-54.ArticlePubMed
    • 4. Mjor IA, Shen C, Eliasson ST, Richter S. Placement and replacement of restorations in general dental practice in Iceland. Oper Dent. 2002;27: 117-123.PubMed
    • 5. Smales RJ, Webster DA. Restoration deterioration related to later failure. Oper Dent. 1993;18: 130-137.PubMed
    • 6. Smales RJ, Gerke DC. Clinical evaluation of light-cured anterior resin composites over periods of up to 4 years. Am J Dent. 1992;5: 208-212.PubMed
    • 7. Hickel R, Manhart J. Longevity of restorations in posterior teeth and reasons for failure. J Adhes Dent. 2001;3: 45-64.PubMed
    • 8. Summitt JB, Robbins JW, Schwartz RS. Fundamentals of Operative Dentistry: A Contemporary Approach. 2001;ed 2. Illinois: Quintessence Publishing; 396.
    • 9. Inoue S, Vargas MA, Abe Y, Yoshida Y, Lambrechts P, Vanherle G, Sano H, Van Meerbeek B. Microtensile bond strength of eleven contemporary adhesives to dentin. J Adhes Dent. 2001;3: 237-245.PubMed
    • 10. Inoue S, Vargas MA, Abe Y, Yoshida Y, Lambrechts P, Vanherle G, Sano H, Van Meerbeek B. Microtensile bond strength of eleven contemporary adhesives to enamel. Am J Dent. 2003;16: 329-334.PubMed
    • 11. Agostini FG, Kaaden C, Powers JM. Bond strength of self-etching primers to enamel and dentin of primary teeth. Pediatr Dent. 2001;23: 481-486.PubMed
    • 12. Kanemura N, Sano H, Tagami J. Tensile bond strength to and SEM evaluation of ground and intact enamel surfaces. J Dent. 1999;27: 523-530.ArticlePubMed
    • 13. Tay FR, Pashley DH, Suh BI, Carvalho RM, Itthagarun A. Single-step adhesives are permeable membranes. J Dent. 2002;30: 371-382.ArticlePubMed
    • 14. Borcic J, Anic I, Smojver I, Catic A, Miletic I, Ribaric SP. 3D finite element model and cervical lesion formation in normal occlusion and in malocclusion. J Oral Rehabil. 2005;32: 504-510.ArticlePubMed
    • 15. Tanaka M, Naito T, Yokota M, Kohno M. Finite element analysis of the possible mechanism of cervical lesion formation by occlusal force. J Oral Rehabil. 2003;30: 60-67.ArticlePubMedPDF
    • 16. McCoy RB, Anderson MH, Lepe X, Johnson GH. Clinical success of class V composite resin restorations without mechanical retention. J Am Dent Assoc. 1998;129: 593-599.ArticlePubMed
    • 17. Pashley DH, Sano H, Ciucchi B, Yoshiyama M, Carvalho RM. Adhesion testing of dentin bonding agents: a review. Dent Mater. 1995;11: 117-125.ArticlePubMed
    • 18. Hashimoto M, Ohno H, Kaga M, Endo K, Sano H, Oguchi H. In vivo degradation of resin-dentin bonds in humans over 1 to 3 years. J Dent Res. 2000;79: 1385-1391.ArticlePubMedPDF
    • 19. Wucher M, Grobler SR, Senekal PJ. A 3-year clinical evaluation of a compomer, a composite and a compomer/composite (sandwich) in class II restorations. Am J Dent. 2002;15: 274-278.PubMed
    • 20. Gordan VV, Mjor IA, Vazquez O, Watson RE, Wilson N. two-year clinical evaluation. J Esthet Restor Dent. 2002;14: 296-302.ArticlePubMed
    • 21. Ryge G, Snyder M. Evaluating the clinical quality of restorations. J Am Dent Assoc. 1973;87: 369-377.ArticlePubMed
    • 22. Pashley EL, Agee KA, Pashley DH, Tay FR. Effects of one versus two applications of an unfilled, all-in-one adhesive on dentine bonding. J Dent. 2002;30: 83-90.ArticlePubMed
    • 23. Uno S, Abo T, Tanaka T, Sano H. In vitro sealing performance of two one-step adhesive systems in cervical cavities. J Adhes Dent. 2004;6: 211-219.PubMed
    • 24. Yoshida E, Uno S. Voids formation along the bonding interface between a smeared dentin surface and all-in-one adhesives. Dent Mater J. 2004;23: 643-649.ArticlePubMed
    • 25. Tay FR, Pashley DH, Garcia-Godoy F, Yiu CK. Single-step, self-etch adhesives behave as permeable membranes after polymerization. Part II. Silver tracer penetration evidence. Am J Dent. 2004;17: 315-322.PubMed
    • 26. Perdigao J, Carmo AR, Anauate-Netto C, Amore R, Lewgoy HR, Cordeiro HJ, Dutra-Correa M, Castilhos N. Clinical performance of a self-etching adhesive at 18 months. Am J Dent. 2005;18: 135-140.PubMed
    • 27. Duke ES, Robbins JW, Snyder DS. Clinical evaluation of a dentinal adhesive system: three-year results. Quintessence Int. 1991;22: 889-895.PubMed
    • 28. Duke ES, Lindemuth J. Variability of clinical dentin substrates. Am J Dent. 1991;4: 241-246.PubMed
    • 29. Gwinnett AJ, Kanca J 3rd. Interfacial morphology of resin composite and shiny erosion lesions. Am J Dent. 1992;5: 315-317.PubMed
    • 30. Tilliss TS, Keating JG. Understanding and managing dentin hypersensitivity. J Dent Hyg. 2002;76: 296-310.PubMed

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    • Comparison of marginal microleakage between low and high flowable resins in class V cavity
      Sang-Bae Bae, Young-Gon Cho, Myeong-Seon Lee
      Journal of Korean Academy of Conservative Dentistry.2009; 34(6): 477.     CrossRef
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      Prospective clinical evaluation of three different bonding systems in class V resin restorations with or without mechanical retention
      J Korean Acad Conserv Dent. 2006;31(4):300-311.   Published online July 31, 2006
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    Figure
    • 1
    Prospective clinical evaluation of three different bonding systems in class V resin restorations with or without mechanical retention
    Image Image Image
    Figure 1 Cavity preparation of experimental tooth.
    Figure 2 Deterioration of the restorations - An example of "marginal discoloration" observed in group E (Adper Prompt, no retention groove), (A) baseline, (B) 6-month recall.
    Figure 3 Scanning electron micrographs of the interface between tooth and restoration - An example of marginal breakdown observed in group E (Adper Prompt, no retention groove), (A) baseline: continuous margin is observed, (B) 6-month recall: breakdown of incisal margin is observed (arrow), (C) higher magnification of the area pointed by arrow in Figure 3-(B).
    Prospective clinical evaluation of three different bonding systems in class V resin restorations with or without mechanical retention

    Design of experimental groups (Number of teeth in each group = 25)

    Bonding procedures in each group

    Modified USPHS criteria used for the clinical evaluation

    Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    Marginal discoloration & marginal adaptation at 6-month recall

    Table 1 Design of experimental groups (Number of teeth in each group = 25)

    Table 2 Bonding procedures in each group

    Table 3 Modified USPHS criteria used for the clinical evaluation

    Table 4 Number of teeth in each rating of the modified USPHS criteria

    These columns present the number of teeth included in each rating for each criterion.

    This row presents the ratio of the number of teeth not showing alpha rating to the total number of teeth included in each group.

    *The number of teeth in each group was 25 at baseline. One tooth from group E (Adper prompt without groove) was dropped out at 6-month recall, because its restoration was replaced with a new restoration using SBMP due to persistent hypersensitivity.

    Table 5 Frequency of undesirable changes in each criterion between baseline and 6-month recall

    *The other criteria (retention, secondary caries, wear-anatomic form, postoperative sensitivity) are not included in this table, because all the teeth were rated alpha in these criteria at 6-month recall.

    Table 6 Marginal discoloration & marginal adaptation at 6-month recall


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