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NCT Number: NCT07363239

CBCT-Based Safety Distance for Implant Placement Near the Inferior Alveolar Canal

o evaluate the radiologic proximity of mandibular dental implants placed less than 2 mm from the inferior alveolar canal using cone-beam computed tomography (CBCT), and to determine the relationship between implant-canal distance and the occurrence of postoperative neurosensory disturbances.

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Key information

Conditions

Inferior Alveolar Approximation Implants

Age range

21 year and older

Sex eligibility

All sexes

Study type

Observational

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age ≥ 21 years.
  • Implants placed in mandibular first/second premolar or molar positions (Froum et al., 2021).
  • Patients without neurosensory changes following implant placement and healing (Froum et al., 2021).
  • Patients with neurosensory changes after implant placement, including paresthesia, anesthesia, dysesthesia (and neuralgia where applicable) (Froum et al., 2021).

Exclusion criteria

  • Incomplete records preventing outcome ascertainment (Froum et al., 2021).
  • Refusal/unavailability of postoperative CBCT when clinically required for evaluation (Froum et al., 2021).
  • Poor-quality CBCT scans or scatter artifacts interfering with evaluation (Froum et al., 2021).
  • Contraindications for radiographs (e.g., pregnancy/breastfeeding) in cases where additional imaging would otherwise be clinically required (Froum et al., 2021).
  • Implants placed after mental foramen

Treatment and study plan

nerve approximation group

Other

implants placed with distance more than 2 mm from the inferior alveolar canal

Primary outcomes

  1. Neurosensory outcome

    Time frame: 6 months

    presence/absence of neurosensory changes after implant placement, classified as reported in records (none, paresthesia, anesthesia, dysesthesia, neuralgia)

Sponsors and collaborators

Lead sponsor

Cairo University

Other

Registry information

Official study title

A New Concept of Safety Distance to Place Implants in the Area of the Inferior Alveolar Canal to Avoid Neurosensory Disturbance: A Retrospective CBCT Study

Important dates

Study start
2027
Primary completion
2027
Study completion
2027
First posted
Jan 23, 2026
Registry last updated
Mar 19, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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