| 摘要 |
The oral retractor (10) is provided for retracting at least a portion of a patient's mouth. The oral retractor (10) is formed from single, continuous closed-loop strand of stainless steel wire. The oral retractor includes a superior lip-engaging portion (12a) for retracting the patient's upper lip away from the upper teeth and gums, and an inferior lip-engaging portion (12b) for retracting the patient's lower lip away from the patient's lower teeth and gums. Bilateral arcuate cheek-engaging portions (14) extend posteriorly from the lip-engaging portions (12) for retracting the patient's cheeks away from the teeth and gums. The lip-engaging portions (12) are formed from linear portions (16a, 16b, 16c, 16d) defining tented arches that extend anteriorly, and superior lip-engaging portion (12a) may be canted upward, while the inferior lip-engaging portion (12b) may be canted downward. The cheek-engaging portions (14) may be substantially parabolic. |
