A dental x-ray sensor holder (1) and sheath (4) for affixing a sensor to a backing plate (2) of the holder (1). The dental x-ray sensor holder (1) and sheath (4) generally includes a sensor holder (1) with a backing plate (2), having one or more spring arms (3), and affixed to or formed contiguously with a proximal end of a bite block (9) of the holder (1). It also includes a sensor sheath adapted to secure a sensor to the backing plate for X-ray acquisition.