Liposomal delivery system for topical anaesthesia of the palatal mucosa

Autor(es)

Franz-Montan, M. ^{[1, 2]} ; de Paula, E. ^[2] ; Groppo, F. C. ^[1] ; Silva, A. L. R. ^[2] ; Ranali, J. ^[1] ; Volpato, M. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Physiol Sci, Piracicaba, SP - Brazil

^[2] Univ Campinas UNICAMP, Inst Biol, Dept Biochem, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BRITISH JOURNAL OF ORAL & MAXILLOFACIAL SURGERY; v. 50, n. 1, p. 60-64, JAN 2012.
• Citações Web of Science: 19

Resumo

An effective topical agent to reduce pain during local anaesthesia of the palate is not yet available. The aim of the present study was to evaluate the efficiency of liposome-encapsulated ropivacaine in different concentrations for topical anaesthesia of the palatal mucosa. In this single-blinded, placebo-controlled, crossover study 40 (20 male) healthy volunteers were randomised to be given: liposome-encapsulated 2% ropivacaine, liposome-encapsulated 1% ropivacaine, a eutectic mixture of 2.5% lidocaine and 2.5% prilocaine (EMLA), and liposomal placebo gel, topically on to the palatal mucosa of the right canine region for 5 min each, at four different sessions. Pain associated with insertion of a 30G needle, and with injection of a local anaesthetic, was rated on a visual analogue scale (VAS). The effect of liposomal ropivacaine 1% and 2% did not differ from that of placebo (p = 0.3 and p = 0.1, respectively) in reducing pain during insertion of the needle. Lower VAS were obtained with EMLA. In this group VAS were lower in women than men (p = 0.007). There was no difference in VAS among groups (p = 0.3) as far as injection of the local anaesthetic was concerned. In conclusion, liposomal-encapsulated ropivacaine formulations did not reduce the pain of insertion of a needle into the palatal mucosa. None of the anaesthetic formulations tested, including the positive control (EMLA), were effective in reducing the pain of an injection of local anaesthetic compared with placebo. (C) 2010 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 06/53255-2 - Avaliacao da eficacia anestesica da ropivacaina encapsulada ou nao em lipossomas, em anestesia odontologica.
• Beneficiário: Michelle Franz Montan Braga Leite
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 06/00121-9 - Novas formulações de anestésicos locais de liberação controlada: do desenvolvimento ao teste clínico odontológico
• Beneficiário: Eneida de Paula
• Modalidade de apoio: Auxílio à Pesquisa - Temático