Mechanical Properties of Elastomeric Impression Materials: An In Vitro Comparison

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td align="left">Dimension (mm)</td><td align="center"> </td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td align="left"><svg height="8.85534pt" id="M4" style="vertical-align:-0.04981041pt" version="1.1" viewbox="-0.0498162 -8.80553 9.37728 8.85534" width="9.37728pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M722 32C646 41 636 48 622 116L544 496L509 667L472 658L153 123C106 45 93 42 27 32L18 0H259L268 32C178 40 172 48 204 107L272 233H509C523 180 533 137 540 96C548 50 546 39 466 32L457 0H714L722 32ZM502 283H299L448 547H450L502 283Z" id="g50-66"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="740" vert-adv-y="740"></glyph.data></g></svg>: overall length (minimum)</td><td align="center">115</td></tr><tr><td align="left"><svg height="8.64656pt" id="M5" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -8.59674 8.03326 8.64656" width="8.03326pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M598 511C598 627 497 650 401 650H141L131 618C219 611 222 606 210 538L130 119C117 43 108 39 25 32L18 0H236C324 0 396 5 456 30C531 59 585 119 585 193C585 285 520 331 428 351V353C529 373 598 423 598 511ZM502 508C502 418 431 368 330 368H263L298 559C303 584 308 595 317 600C329 608 345 612 369 612C428 612 502 595 502 508ZM483 197C483 95 404 39 309 39C225 39 206 58 219 139L256 330H317C395 330 483 301 483 197Z" id="g50-67"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="622" vert-adv-y="622"></glyph.data></g></svg>: width of ends</td><td align="center">25.0 ± 1</td></tr><tr><td align="left"><svg height="9.01192pt" id="M6" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.80553 8.93363 9.01192" width="8.93363pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M690 629C653 643 577 667 483 667C225 667 24 528 24 292C24 92 174 -17 367 -17C448 -17 534 1 570 10C592 34 642 131 658 174C648 180 639 186 629 192C562 89 499 21 382 21C223 21 130 138 130 298C130 467 255 627 462 627C582 627 643 589 650 462L686 466C689 517 688 580 690 629Z" id="g50-68"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="714" vert-adv-y="714"></glyph.data></g></svg>: length of narrow portion</td><td align="center">33 ± 2</td></tr><tr><td align="left"><svg height="8.64656pt" id="M7" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -8.59674 10.1863 8.64656" width="10.1863pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M786 370C786 572 637 650 431 650H137L130 618C217 606 220 603 204 519L129 127C115 48 107 39 26 30L18 0H270C410 0 516 20 609 75C722 140 786 240 786 370ZM683 373C683 178 547 40 323 40C298 40 264 40 241 45C213 51 207 64 220 127L295 545C304 582 309 595 320 601C335 610 367 613 406 613C570 613 683 538 683 373Z" id="g50-69"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="810" vert-adv-y="810"></glyph.data></g></svg>: width of narrow portion</td><td align="center">6 ± 0.4</td></tr><tr><td align="left"><svg height="8.64656pt" id="M8" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -8.59674 8.229 8.64656" width="8.229pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M615 650H141L132 618C223 612 227 607 212 526L136 123C122 42 112 38 27 32L18 0H522C539 33 580 135 592 166L558 179C536 139 512 100 486 75C454 48 420 41 345 41C287 41 252 42 237 55C221 68 220 100 231 158L261 316H357C455 316 455 309 455 235H489L529 437H494C468 366 460 360 369 360H269L305 565C315 609 316 611 357 611H450C525 611 535 599 548 578C559 556 561 526 560 482L595 486L615 650Z" id="g50-70"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="639" vert-adv-y="639"></glyph.data></g></svg>: transition radius outside</td><td align="center">14 ± 1</td></tr><tr><td align="left"><svg height="8.64656pt" id="M9" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -8.59674 8.12461 8.64656" width="8.12461pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M606 650H137L129 618C217 609 221 609 203 518L129 129C115 46 106 40 26 32L18 0H300L307 32C210 40 203 45 218 129L249 305H358C454 305 455 296 457 219H491L531 425H497C465 353 463 350 366 350H259L300 569C306 605 310 611 346 611H444C522 611 535 598 541 578C550 557 553 519 552 485L588 489L606 650Z" id="g50-71"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="630" vert-adv-y="630"></glyph.data></g></svg>: transition radius inside</td><td align="center">25 ± 2</td></tr><tr><td align="left"><svg height="9.01192pt" id="M10" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.80553 9.14241 9.01192" width="9.14241pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M722 297H451L442 267C561 257 561 253 547 182L531 98C521 44 465 24 390 24C228 24 130 134 130 296C130 482 252 628 465 628C592 628 657 579 656 458L692 461C695 540 699 605 702 631C664 642 590 667 492 667C203 667 24 502 24 285C24 93 170 -17 368 -17C464 -17 543 11 617 28C613 43 612 68 620 106L635 182C649 255 652 258 716 268L722 297Z" id="g50-72"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="734" vert-adv-y="734"></glyph.data></g></svg>: thickness of narrow portion</td><td align="center">2 ± 0.2</td></tr><tr><td align="left"><svg height="8.64656pt" id="M11" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -8.59674 11.1519 8.64656" width="11.1519pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M870 650H600L593 618C681 609 684 605 669 516L641 367H261L286 516C302 603 313 610 391 618L398 650H132L123 618C214 610 218 606 200 516L127 130C113 46 107 40 25 32L18 0H290L298 32C204 40 200 42 214 130L250 321H631L596 131C580 47 573 39 484 32L475 0H753L762 32C673 39 668 46 685 130L757 516C772 606 778 610 861 618L870 650Z" id="g50-73"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="882" vert-adv-y="882"></glyph.data></g></svg>: test length</td><td align="center">25 ± 0.5</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Dimensions for dumbbell test specimens according to type 1 of the ISO 37:2005 specifications and/or type C of ASTM.D412 specifications. Each uppercase letter relates to the corresponding dimension as indicated in Figure <a href="../fig1/">1</a>.

International Journal of Dentistry

tab2

Table 2

Table 2: Mechanical Properties of Elastomeric Impression Materials: An In Vitro Comparison 