Table 1. Number of study practices, number of teeth with posterior composite restorations (PCR) and root canal treatment (RCT) procedures across the 6 network regions.
| Network regions (number of practices) | PCR by number of surfaces | RCT by tooth type | ||||||
|---|---|---|---|---|---|---|---|---|
| One-surface | Two-surfaces | Three or >surfaces | Total | Anterior | Bicuspid | Molar | Total | |
| Western (16) | 54,406 | 50,343 | 23,780 | 128,529 | 1,460 | 2,908 | 4,415 | 8,783 |
| Midwest (13) | 43,403 | 37,315 | 15,390 | 96,108 | 1,938 | 3,371 | 4,701 | 10,010 |
| Southwest (23) | 81,792 | 77,126 | 23,925 | 182,843 | 2,585 | 4,885 | 7,575 | 15,045 |
| South Central (16) | 88,510 | 70,631 | 28,585 | 187,726 | 3,188 | 5,102 | 7,344 | 15,634 |
| South Atlantic (16) | 51,926 | 46,216 | 17,493 | 115,635 | 3,089 | 4,689 | 5,371 | 13,149 |
| Northeast (15) | 51,900 | 43,639 | 22,737 | 118,276 | 1,880 | 2,752 | 4,005 | 8,637 |
| Total (99) | 371,937 | 325,270 | 131,910 | 829,117 | 14,140 | 23,707 | 33,411 | 71,258 |