Protective sleeve for intraoral scanner

1. A protective attachment of an intraoral scanner, comprising:

a removable housing configured to fit over a portion of the intraoral scanner and to provide an outermost surface for the portion of the intraoral scanner that protects the portion of the intraoral scanner from an external environment, wherein the removable housing comprises a first longitudinal axis that aligns with a second longitudinal axis of the intraoral scanner, wherein the removable housing defines an aperture for transmission of optical signals, wherein a vector normal to a plane defined by the aperture is at a right angle or an acute angle to the first longitudinal axis, and wherein the vector normal to the plane defined by the aperture is at a right angle or an acute angle to the second longitudinal axis when the removable housing is fit over the portion of the intraoral scanner;

one or more supports attached to the removable housing; and

a defogging element secured to the removable housing by the one or more supports, the defogging element comprising:

a transparent substrate aligned with the aperture; and

a transparent conductive layer on a surface of the transparent substrate, wherein responsive to the application of electrical power to the transparent conductive layer, the transparent conductive layer generates heat.

2. The protective attachment of claim 1 , wherein the removable housing comprises plastic.

3. The protective attachment of claim 1 , wherein the transparent substrate has an optical transmission of at least 90%.

4. The protective attachment of claim 1 , wherein the transparent substrate has a thickness of 0.75-1.0 mm.

5. The protective attachment of claim 1 , wherein the transparent substrate comprises at least one of glass, plastic or polycarbonate.

6. The protective attachment of claim 1 , wherein the transparent conductive layer has an optical transmission of at least 90%.

7. The protective attachment of claim 1 , wherein the transparent conductive layer has a thickness of less than 1 micron.

8. The protective attachment of claim 1 , wherein the transparent conductive layer comprises at least one of indium tin oxide, fluorine tin oxide or aluminum tin oxide.

9. The protective attachment of claim 1 , wherein the surface of the transparent substrate is an external surface of the transparent substrate, the protective attachment further comprising:

an electrically insulating layer that covers the transparent conductive layer.

10. The protective attachment of claim 9 , further comprising:

an anti-reflective layer that covers the electrically insulating layer.

11. The protective attachment of claim 1 , further comprising:

one or more conductive elements coupled to the transparent substrate and in electrical contact with the transparent conductive layer, wherein the one or more conductive elements are configured to make an electrical connection to a power source when the portion of the intraoral scanner is inserted into the protective attachment.

12. The protective attachment of claim 1 , further comprising:

a plurality of temperature sensors disposed proximate to the defogging element, the plurality of temperature sensors to communicate temperature measurements to the intraoral scanner.

13. The protective attachment of claim 1 , wherein the protective attachment is a replaceable protective sleeve.

14. A protective attachment of an intraoral scanner, comprising:

a removable housing configured to fit over a portion of the intraoral scanner and to provide an outermost surface for the portion of the intraoral scanner that protects the portion of the intraoral scanner from an external environment, wherein the removable housing comprises a second longitudinal axis that aligns with a first longitudinal axis of the intraoral scanner, wherein the intraoral scanner comprises a first aperture for transmission of optical signals, wherein the removable housing defines a second aperture for transmission of the optical signals, wherein a first vector normal to a first plane defined by the first aperture is at a right angle or an acute angle to the first longitudinal axis, wherein a second vector normal to a second plane defined by the second aperture is at a right angle or an acute angle to the second longitudinal axis, and wherein a) the second aperture is aligned with the first aperture and b) the second vector normal to the second plane defined by the second aperture is at a right angle or an acute angle to the first longitudinal axis when the removable housing is fit over the portion of the intraoral scanner;

one or more supports attached to the removable housing; and

a transparent element secured by the one or more supports and aligned with the second aperture, wherein the transparent element is further aligned with a defogging element of the intraoral scanner when the removable housing is fit over the portion of the intraoral scanner, and wherein an external surface of the transparent element is to receive heat generated by the defogging element to prevent fogging of the transparent element.

15. The protective attachment of claim 14 , wherein the removable housing comprises plastic.

16. The protective attachment of claim 14 , wherein the transparent element has an optical transmission of at least 90%.

17. The protective attachment of claim 14 , wherein the transparent element has a thickness of 0.75-1.0 mm.

18. The protective attachment of claim 14 , wherein the protective attachment is a replaceable protective sleeve, and wherein the transparent element comprises at least one of glass, plastic or polycarbonate.

19. The protective attachment of claim 14 , wherein the protective attachment is configured to maintain a uniform gap of 0.3 mm between the transparent element and the defogging element to facilitate uniform heat transfer between the defogging element and the transparent element.

20. The protective attachment of claim 14 , further comprising:

one or more temperature sensors that are to communicate temperature measurements to the intraoral scanner.