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Published on: March 7, 2014
Interstitial tissue pressure associated with dental injections: a clinical study
Mark N Hochman1, Mark J Friedman, Wayne Williams
1Department of Orthodontics and Implant Dentistry, New York University College of Dental Surgery, 26 Meadow Woods Road, Lake Success, NY 11020, USA. PerioOrtho@aol.com
Quintessence International (Berlin, Germany : 1985)
|June 7, 2006
Summary
Interstitial fluid pressure during dental injections varies significantly by location. Denser tissues, like the periodontal ligament, generate higher pressures than less dense areas, impacting anesthetic delivery.
Area of Science:
- Dentistry
- Anesthesiology
- Biomedical Engineering
Background:
- Local anesthetic administration is a common dental procedure.
- Understanding tissue resistance is crucial for effective anesthesia.
- Interstitial fluid pressure during injection is not well-characterized.
Purpose of the Study:
- To measure interstitial fluid pressure during local anesthetic administration at four oral cavity locations.
- To determine if soft tissue density influences interstitial fluid pressure at a fixed flow rate.
Main Methods:
- Utilized a computer-controlled device (CompuFlo) to record injection pressures.
- Administered 200 injections of lidocaine with epinephrine at 0.005 mL/sec.
- Compared pressures across four injection groups: PDL, anterior middle superior alveolar, supraperiosteal, and inferior alveolar nerve blocks.
Main Results:
- Statistically significant differences in interstitial fluid pressure were observed (P < .001).
- Mean pressures: PDL (293.98 psi), anterior middle superior alveolar (68.16 psi), supraperiosteal (11.50 psi), inferior alveolar (9.76 psi).
- PDL and anterior middle superior alveolar injections generated significantly higher pressures than the other two groups.
Conclusions:
- Interstitial resistance to fluid pressure can be quantified during dental local anesthetic injections.
- A classification of soft tissue density can be defined based on fluid pressure and tissue resistance characteristics.
