Blood Gas Tension and Acidity Level of Caries Exposed Vital Pulps in Primary Molars

Aviv Shmueli, Marcio Guelmann, Nili Tickotsky, Rinat Ninio-Harush, Avia Fux Noy, Moti Moskovitz

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Objective: The purpose of this study was to determine if gas tension and acidity levels could serve as biomarkers of pulp inflammatory status in primary dentition. Study design: The present study evaluated acidity level and blood partial pressures of O2 and CO2 collected from vital pulp chambers of 84 primary molars with deep carious lesions encroaching the pulp. Teeth were treated with pulpotomy or pulpectomy based on clinical judgement. Pulpectomy was performed when symptoms of spontaneous pain, difficulty in obtaining hemostasis and/or dark purple blood were present. Using a glass capillary, pulp chamber bleeding was collected and within ten minutes a neonate Astrup test was performed to determine blood gas module pH, pCO2, and pO2. Results: Eighty-four children with one affected tooth participated in the study (37 girls and 47 boys). Age ranged between 3.5 to 9-years (average: 5.3 years). Seventy-one (84%) were treated with the aid of inhalation analgesia, conscious sedation or general anesthesia. Pulpotomy was performed on 58 teeth (69%). Teeth undergoing pulpectomy revealed significant higher level of CO2 partial pressure (P= 0.002). Acidity level values (pH) were also lower but none significantly in teeth with pulpectomy (P= 0.137). Conclusions: Higher pCO2 levels was found in pulps needing pulpectomy.

Original languageEnglish
Pages (from-to)418-422
Number of pages5
JournalJournal of Clinical Pediatric Dentistry
Issue number6
StatePublished - 1 Dec 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Clinical Pediatric Dentistry.


  • Acidity levels
  • Biomarkers
  • Blood gas monitoring
  • Primary dentition


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