Post-operative Sensitivity of Selective-etch and Total-etch Techniques in Composite Resin Restorations: An In-vivo Study
Published: April 1, 2020 | DOI: https://doi.org/10.7860/JCDR/2020/42997.13619
Tony Francis, Nasil Sakkir, Htoo Htoo Kyaw Soe, Teh Yeong Yeow, Hoo Zhi Hwe, Adrienne Loh Ming Tze
1. Assistant Professor, Department of Conservative Dentistry and Endodontics, Melaka Manipal Medical College (Manipal Academy of Higher Education (MAHE)), Melaka, Malaysia.
2. Consultant Endodontist, Department of Endodontics, Trien Dentistry- The Dental Clinic, Kochi, Kerala, India.
3. Professor, Department of Community Medicine, Melaka Manipal Medical College (Manipal Academy of Higher Education (MAHE)), Melaka, Malaysia.
4. Resident, Department of Conservative Dentistry and Endodontics, Melaka Manipal Medical College (Manipal Academy of Higher Education (MAHE)), Melaka, Malaysia.
5. Resident, Department of Conservative Dentistry and Endodontics, Melaka Manipal Medical College (Manipal Academy of Higher Education (MAHE)), Melaka, Malaysia.
6. Resident, Department of Conservative Dentistry and Endodontics, Melaka Manipal Medical College (Manipal Academy of Higher Education (MAHE)), Melaka, Malaysia.
Correspondence
Nasil Sakkir,
Trien Dentistry- The Dental Clinic, Second Floor, Anagha Apartment, Shihab Thangal Road, Panampilly Nagar, Kochi-682036, Kerala, India.
E-mail: nasil.sm@gmail.com
Introduction: Composite restorations placed using selectiveetch technique has been claimed to induce significantly lower postoperative sensitivity than a three-step etch and rinse technique. Selective-etch technique overcomes the main drawback of self-etch technique, which is suboptimal etching of mineralised enamel, by acid etching only the enamel prior to using the adhesive. The newer universal bonding agent can be used in a self-etch, selective-etch, or etch and rinse mode.
Aim: To evaluate the influence of selective-etch versus totaletch techniques of using Scotchbond universal adhesive on the postoperative sensitivity in composite restorations placed by undergraduate students.
Materials and Methods: Sixty patients with ICDAS code 4 or 5 cavities for composite restorations by undergraduate students were randomly allocated into two groups. Restorations were done using Filtek Z350 XT and Scotchbond™ Universal Adhesive. In total-etch group, the entire preparation was acid etched for 20 seconds, and rinsed with water spray for 15 seconds. In selective-etch group, only the enamel was acid etched for 20 seconds, and rinsed. The postoperative sensitivity of the restorations was evaluated preoperatively, immediately after treatment, 24 hours and 2 weeks after treatment. Sensitivity scores were generated from the patient’s response to a Visual Analogue Scale (VAS) having scores from 0 to 10. The results were statistically analysed using Mann Whitney U-test and Friedman test. The level of significance was set at p-value less than 0.05.
Results: There was no significant difference in the sensitivity between total-etch and selective-etch groups pre-treatment and during three postoperative follow-up periods (p-value >0.05). However, there was statistically significant decrease in the sensitivity at 24 hours and 2 weeks after treatment when compared with baseline scores in both total-etch and selectiveetch groups (p-value <0.001).
Conclusion: Both total-etch and selective-etch techniques of bonding using universal adhesive systems can be safely practiced by dental undergraduate students without the fear of developing postoperative sensitivity in patients.
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