Thread-Skip: An Undefined Common Observation.

Area of Science:

• Dental Implantology
• Prosthodontics
• Biomaterials Science

Background:

• Screw-retained implant prostheses are common in dental restorations.
• The removal process of these prostheses involves unscrewing a retaining screw.
• A specific tactile and auditory feedback during removal is frequently observed but not documented.

Purpose of the Study:

• To describe and formally name the auditory and tactile feedback observed during the removal of screw-retained implant prostheses.
• To introduce the term "thread-skip" for this phenomenon.

Main Methods:

• Clinical observation of screw-retained implant prosthesis removal.
• Description of the auditory "click" and tactile "axial shift" feedback.
• Literature review to identify previous documentation of this observation.

Main Results:

• A consistent "click" sound and slight "axial shift" are observed when the screw fully disengages from the retaining thread.
• This phenomenon, now termed "thread-skip," has not been previously described in scientific literature.
• The observation signifies complete removal of the screw from the implant abutment or prosthesis.

Conclusions:

• The "thread-skip" phenomenon is a reliable indicator of complete screw removal in screw-retained implant prostheses.
• Formal recognition of "thread-skip" enhances understanding and communication among dental professionals.
• Further research may explore the mechanical factors contributing to thread-skip.