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Effect of repeated autoclave on hardness, tensile and compressive strength of polypropylene/natural rubber developed for rubber dam clamp
Name: Thitaporn Nonthiphalang
keyword:
Polypropylene
;
Hardness
Abstract:
This research investigates the potential use of polypropylene (PP) and natural rubber (NR) blends as an alternative to conventional stainless steel rubber dam clamps typically used in dentistry. The hardness, tensile and compressive strength of various PP/NR blend ratios were assessed. One-way ANOVA test results found that PP/NR blends exhibit significantly lower hardness (p<0.001) than the commercial SoftClampTM. The findings indicated that PP/NR ratios of 100/0, 90/10, and 80/20 exhibit hardness levels of 82%, 80%, and 75%, respectively. Subsequently, these specific PP/NR blend ratios undergo simulation of clinical sterilization processes through 1, 5, and 10 autoclave cycles. Two-way ANOVA revealed significant reductions in hardness (p<0.001), tensile strength (p<0.001) and compressive strength (p<0.001) with increasing NR content across all autoclave cycles. However, post-autoclave assessments at 1, 5, and 10 cycles demonstrated no statistically significant differences in tensile strength (p=0.058), hardness strength (p=0.52) and compressive strength (p=0.979) for PP/NR ratios of 100/0, 90/10, and 80/20 compared to their pre-autoclave states. The study concludes that the NR content within PP/NR blends decreases hardness, tensile and compressive strength while autoclaving does not significantly affect the hardness, tensile and compressive strength of PP/NR blends.
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Nantawan Krajangta
Role:
advisor
Role:
co-advisor
Created:
2024
Modified:
2568-05-13
Issued:
2025-04-08
eng
Level: Master's Degree
Descipline: Restorative and Esthetic Dentistry
Grantor: Thammasat University
DegreeName: Master of Science
©copyrights
RightsAccess:
ใช้เวลา
0.026797 วินาที
Thitaporn Nonthiphalang
| Title | Contributor | Type |
|---|---|---|
| Effect of repeated autoclave on hardness, tensile and compressive strength of polypropylene/natural rubber developed for rubber dam clamp
มหาวิทยาลัยธรรมศาสตร์ Thitaporn Nonthiphalang | Nantawan Krajangta Panjaporn Wongwitthayakool | วิทยานิพนธ์/Thesis |
Nantawan Krajangta
| Title | Creator | Type and Date Create |
|---|---|---|
| Surface discoloration of hybrid materials fabricated from 3D printing technology compared with milling procedure
มหาวิทยาลัยธรรมศาสตร์ Nantawan Krajangta | Nicha Intralawan | วิทยานิพนธ์/Thesis |
| Effect of protective surface coating on hardness, fluoride releasing and recharging ability of recent uncoated high viscosity glass ionomer cement
มหาวิทยาลัยธรรมศาสตร์ Nantawan Krajangta | Chayanee Dulsamphan | วิทยานิพนธ์/Thesis |
| Effect of anti-COVID-19 mouthwashes on shear bond strength of resin-matrix ceramics repaired with resin composite using universal adhesive
มหาวิทยาลัยธรรมศาสตร์ Nantawan Krajangta;Awiruth Klaisiri | Wichuda Limsiriwong | วิทยานิพนธ์/Thesis |
| Effect of repeated autoclave on hardness, tensile and compressive strength of polypropylene/natural rubber developed for rubber dam clamp
มหาวิทยาลัยธรรมศาสตร์ Nantawan Krajangta;Panjaporn Wongwitthayakool | Thitaporn Nonthiphalang | วิทยานิพนธ์/Thesis |
Panjaporn Wongwitthayakool
| Title | Creator | Type and Date Create |
|---|---|---|
| Flexural strength and dynamic mechanical properties of polypropylene/natural rubber blends and the effect of autoclave sterilization : a preliminary study for customized rubber dam clamp
มหาวิทยาลัยธรรมศาสตร์ Panupat Phumpatrakom;Panjaporn Wongwitthayakool | Paphavarin Rangsantham | วิทยานิพนธ์/Thesis |
| Effect of repeated autoclave on hardness, tensile and compressive strength of polypropylene/natural rubber developed for rubber dam clamp
มหาวิทยาลัยธรรมศาสตร์ Nantawan Krajangta;Panjaporn Wongwitthayakool | Thitaporn Nonthiphalang | วิทยานิพนธ์/Thesis |