Company: SINT
Filing Date: 2025-09-30
Form Type: S-8
Source: 0001493152-25-016345
Chunk: 0

Company: Sintx Technologies, Inc.
Filing Date: 2025-09-30
Form: S-8
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on September 30, 2025</div>

Registration No. 333-

<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER THE SECURITIES ACT OF 1933

SINTX Technologies, Inc.

(Exact name of registrant as specified in its charter)</div>

| Delaware                 |     | 84-1375299     |
| (State                   
 or other jurisdiction of |     | (I.R.S.        
 Employer       |
| incorporation            
 or organization)         |     | Identification 
 No.)           |

<div align='center'>1885 West 2100 South

Salt Lake City, UT 84119

(Address of Principal Executive Offices) (Zip Code)

SINTX TECHNOLOGIES, INC. 2025 EQUITY INCENTIVE PLAN

(Full title of the plan)

Eric Olson

President and Chief Executive Officer

SINTX Technologies, Inc.

1885 West 2100 South

Salt Lake City, UT, 84119

(Name and address of agent for service)

(801) 839-3500

(Telephone number, including area code, of agent for service)</div>

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large               
 accelerated filer ☐ |     | Accelerated         
 filer ☐             |
| Non-accelerated     
 filer ☒             |     | Smaller             
 reporting company ☒ |
|                     |     | Emerging            
 growth company ☐    |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

<div align='center'>Copies to:</div>

| Kevin                
 Ontiveros            |     | David                         
 F. Marx                       |
| Chief                
 Legal Officer        |     | Daniel                        
 P. Lyman                      |