Erschienen in:
25.09.2020 | Original Article
Puncture points related to the tragal-lateral canthus line in conventional temporomandibular joint arthrocentesis: are they accurate? A cadaver study
verfasst von:
Luiz Felipe Palma, Gabriela de Godoy Froes, Alyne Pereira, Ricardo Yudi Tateno, Luana Campos, Luís Otávio Carvalho de Moraes
Erschienen in:
Oral and Maxillofacial Surgery
|
Ausgabe 2/2021
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Abstract
Purpose
To evaluate the technical success of conventional TMJ arthrocentesis in cadavers, using the tragal-lateral canthus line as an anatomical reference for the puncture points.
Methods
Ten formalin-treated and 8 fresh cadavers were submitted to the arthrocentesis. A point located 10 mm anteriorly and 2 mm inferiorly to the beginning of the tragal-lateral canthus line (A) and another point 20 mm anteriorly and 10 mm inferiorly (B) were demarked on the cadavers’ skin. Following, 1 mL of methylene blue solution was injected through the needle at point A, and then another needle was placed at point B. Saline solution was injected through the first needle, identifying a free flow of bluish solution.
Results
Concerning the formalin-treated cadavers, TMJ arthrocentesis was not successfully performed in any case (0%). In the fresh cadavers, the procedure was properly conducted bilaterally in only one case (12.5%) and unilaterally in 3 cases (37.5%), 2 on the left side (25.0%) and one on the right (12.5%).
Conclusion
The traditional points related to the tragal-lateral canthus line seemed not to be accurate references for the insertion of the needles in conventional TMJ arthrocentesis when 1 mL of solution is used initially and the maximum mouth opening is not achieved.