{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T15:52:13Z","timestamp":1791215533672,"version":"4.1.0"},"reference-count":49,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2009,4,3]],"date-time":"2009-04-03T00:00:00Z","timestamp":1238716800000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"NIH\/NIDCR","award":["R01-DE014554"],"award-info":[{"award-number":["R01-DE014554"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Lasers Surg Med"],"published-print":{"date-parts":[[2009,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Objectives<\/jats:title>\n                    <jats:p>\n                      In vitro studies have shown that CO\n                      <jats:sub>2<\/jats:sub>\n                      lasers operating at the highly absorbed 9.3 and 9.6\u2010\u00b5m wavelengths with a pulse duration in the range of 10\u201320\u2010microsecond are well suited for the efficient ablation of enamel and dentin with minimal peripheral thermal damage. Even though these CO\n                      <jats:sub>2<\/jats:sub>\n                      lasers are highly promising, they have yet to receive FDA approval. Clinical studies are necessary to determine if excessive heat deposition in the tooth may have any detrimental pulpal effects, particularly at higher ablative fluencies. The purpose of this study was to evaluate the pulpal safety of laser irradiation of tooth occlusal surfaces under the conditions required for small conservative preparations confined to enamel.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design\/Materials and Methods<\/jats:title>\n                    <jats:p>\n                      Test subjects requiring removal of third molar teeth were recruited and teeth scheduled for extraction were irradiated using a pulsed CO\n                      <jats:sub>2<\/jats:sub>\n                      laser at a wavelength of 9.3 \u00b5m operating at 25 or 50 Hz using a incident fluence of 20 J\/cm\n                      <jats:sup>2<\/jats:sup>\n                      for a total of 3,000 laser pulses (36 J) for both rates with water cooling. Two control groups were used, one with no treatment and one with a small cut made with a conventional high\u2010speed hand\u2010piece. No anesthetic was used for any of the procedures and tooth vitality was evaluated prior to treatment by heat, cold and electrical testing. Short term effects were observed on teeth extracted within 72 hours after treatment and long term effects were observed on teeth extracted 90 days after treatment. The pulps of the teeth were fixed with formalin immediately after extraction and subjected to histological examination. Additionally, micro\u2010thermocouple measurements were used to estimate the potential temperature rise in the pulp chamber of extracted teeth employing the same irradiation conditions used in vivo.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Pulpal thermocouple measurements showed the internal temperature rise in the tooth was within safe limits, 3.3\u00b11.4\u00b0C without water cooling versus 1.7\u00b11.6\u00b0C with water\u2010cooling,\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200925,\n                      <jats:italic>P<\/jats:italic>\n                      &lt;0.05. None of the control or treatment groups showed any deleterious effects on pulpal tissues and none of the 29 test\u2010subjects felt pain or discomfort after the procedure. Only two test\u2010subjects felt discomfort from \u201ccold sensitivity\u201d during the procedure caused by the water\u2010spray.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      It appears that this CO\n                      <jats:sub>2<\/jats:sub>\n                      laser can ablate enamel safely without harming the pulp under the rate of energy deposition employed in this study. Lasers Surg. Med. 41:256\u2013263, 2009. \u00a9 2009 Wiley\u2010Liss, Inc.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/lsm.20748","type":"journal-article","created":{"date-parts":[[2009,4,3]],"date-time":"2009-04-03T11:03:50Z","timestamp":1238756630000},"page":"256-263","source":"Crossref","is-referenced-by-count":24,"title":["Pulpal effects of enamel ablation with a microsecond pulsed\n                    <i>\u03bb<\/i>\n                    \u2009=\u20099.3\u2010\u00b5m CO\n                    <sub>2<\/sub>\n                    laser"],"prefix":"10.1002","volume":"41","author":[{"given":"Michal","family":"Staninec","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cynthia L.","family":"Darling","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harold 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