Table 2. Characteristics of studies included in the systematic review and the oxygen saturation values by tooth group, index finger oxygen saturation, and method of diagnostic confirmation.
| Variable | Pulse oximetry evaluation of maxillary teeth | Index finger saturation | Confirmation method | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Study | Country | Age (yr) | Type of oximeter | Type of probe | Central incisor | Lateral incisor | Canine | |||||||||
| No. | Mean (%) | SD | No. | Mean (%) | SD | No. | Mean (%) | SD | Mean (%) | SD | ||||||
| Schnettler and Wallace [16] | USA | 18–55 | Novametrix | - | 44 | 94.0 | - | NA | - | - | NA | - | - | 97 | - | TT |
| Radhakrishnan et al. [9] | India | - | Simed 100e | SMP | 200 | 81.0 | 1.5 | 200 | 80.6 | 1.7 | NA | - | - | 98 | 0.7 | EPT |
| Gopi Krishna et al. [17] | India | 15–40 | Nellcor OxiMax N-550 | Dura Y D-YS | 40 | 79.3 | 3.1 | 30 | 79.6 | 2.7 | 30 | 79.9 | 2.09 | 98 | 0.6 | No |
| Calil et al. [18] | Brazil | 26–38 | Oxygraph | SMP | 28 | 91.3 | 2.6 | NA | - | - | 32 | 90.7 | 2.71 | 95 | 2.6 | TT |
| Karayilmaz and Kirzioğlu [4] | Turkey | 12–18 | Life Scope I | SMP | 38 | 86.3 | 3.3 | 21 | 87.5 | 3.1 | NA | - | - | - | - | LDF |
| Pozzobon et al. [19] | Brazil | 4–13 | BCI 3301 | SMP | 25 | 87.8 | 6.6 | NA | - | - | 28 | 83.4 | 8.57 | 93 | 3.5 | No |
| Siddheswaran et al. [11] | India | > 18 | Datex Ohmeda | OxyTip+® | 100 | 87.8 | 1.8 | NA | - | - | NA | - | - | 98 | 0.4 | TT |
| 7–12 | 100 | 87.1 | 2.8 | - | - | - | NA | - | - | 97 | 1.1 | TT | ||||
| Ciobanu et al. [20] | Romania | 20–40 | Portable NT 1 | SMP | 40 | 83.3 | - | 40 | 78.5 | - | 40 | 84.5 | - | 97 | - | No |
| Sadique et al. [3] | India | 15–40 | Criticare 504 | Finger probe | 120 | 85.1 | 2.1 | 120 | 80.2 | 2.0 | 120 | 89.6 | 1.09 | 96 | 0.7 | No |
| Stella et al. [21] | Brazil | 22–36 | BCI 3301 | 3025 sensor | 56 | 77.9 | 1.4 | NA | - | - | NA | - | - | 96 | 2.9 | No |
| 7–13 | 54 | 84.4 | 1.4 | NA | - | - | NA | - | - | 96 | 2.9 | |||||
| Kosturkov et al. [22] | Bulgaria | 18–25 | Contec CMS 60D | SMP | 174 | 84.4 | 8.0 | 175 | 83.3 | 8.4 | 175 | 83.4 | 8.02 | 98 | - | EPT |
| Kataoka et al. [23] | Brazil | 35–65 | Oxygraph | Y-type sensors | 235 | 93.5 | 1.7 | 235 | 90.0–98.0 | 1.6 | 115 | 92.0 | 1.67 | - | - | TT |
| Khademi et al. [24] | Iran | 13–24 | Criticare 504 | Ear probes | NA | - | - | NA | - | - | 20 | 87.8 | 4.01 | - | - | EPT |
| Kosturkov et al. [25] | Bulgaria | 22–29 | Contec CMS 60D | SMP | 395 | 84.0 | 8.5 | 392 | 83.5 | 7.9 | 398 | 83.8 | 6.99 | - | - | EPT |
| Kosturkov and Uzunov [26] | Bulgaria | - | Contec CMS 60D | SMP | 3 | 92.0 | 1.7 | 3 | 90.0 | 0.0 | 7 | 90.4 | 1.61 | - | - | EPT |
| Souza et al. [27] | Brazil | 17–39 | MD300A | SMP | 102 | 89.0 | 2.3 | 132 | 87.0 | 2.3 | 174 | 86.0 | 5.00 | 87 | - | TT |
| Kosturkov et al. [28] | Bulgaria | 22–29 | Contec CMS 60D | SMP | 44 | 83.0 | 1.0 | NA | - | - | NA | - | - | - | - | No |
| Solda et al. [29] | Brazil | 19–36 | BCI 3301 | 3026 sensor | 136 | 85.1 | 1.9 | NA | - | - | NA | - | - | 97 | 1.5 | TT |
| Lima et al. [30] | Brazil | 18–27 | BCI 3301 | SYS 103 | 120 | 84.8 | - | NA | - | - | NA | - | - | 97 | - | TT |
SD, standard deviation; SMP, specially modified probe; NA, not applied; TT, thermal test; EPT, electric pulp test; LDF, laser Doppler flowmetry.