Persistent, neuropathic-like trigeminal pain after dental implant loading

Area of Science:

• Neurology
• Oral Surgery
• Pain Management

Background:

• Painful post-traumatic trigeminal neuropathy (PTTN) is a recognized complication of dental implant therapy.
• Some patients develop neuropathic-like symptoms only after implant loading (crown placement), suggesting a delayed onset.
• This study focuses on the clinical characteristics of pain in patients experiencing these delayed symptoms.

Purpose of the Study:

• To describe the clinical features of trigeminal neuropathic-like pain that arises after dental implant loading.
• To investigate the phenomenon of delayed PTTN triggered by the functional use of dental implants.

Main Methods:

• Retrospective screening of patients with chronic orofacial pain at a French hospital (2015-2020).
• Inclusion criteria: history of dental implant placement, no pain for 6 months post-surgery, and pain onset linked to implant loading.
• Analysis of clinical features and pain characteristics in eligible patients.

Main Results:

• Five patients met the inclusion criteria; all were women with a mean age of 62.4 years.
• Patients reported persistent trigeminal neuropathic-like pain, characterized by moderate to severe intensity.
• Key symptoms included pins and needles, burning, tingling, and electric shock sensations.

Conclusions:

• The findings suggest that dental implant loading can act as a trigger for trigeminal neuropathy in a sensitized nerve.
• The study discusses potential neurophysiological mechanisms underlying this delayed neuropathic pain phenomenon.
• Key terms: Neuropathic pain, trigeminal nerve, lesion, dental implant, implant loading, allodynia.