Clinical evaluation of different protocols for treating cervical dentin hypersensitivity

Author(s)

Anely Oliveira Lopes

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia (FO/SDO)
• Defense date: 2012-06-05

Examining board members

Ana Cecilia Corrêa Aranha; Marcia Martins Marques; Marina Stella Bello Silva

• Advisor: Ana Cecilia Corrêa Aranha

Abstract

Due to changes in lifestyle in the modern world and the world\'s population becoming older, an increase in the occurrence of non-carious cervical lesions is increasing. As a result, dentin hypersensitivity can be highlighted as a common complaint among adults and represents one of the most critical and persistent problems in dentistry. So, this randomized longitudinal clinical study aimed to assess different treatment protocols for dentinal hypersensitivity with low power laser (with different dosages), high-power laser, desensitizing agent and its associations, for a period up to 06 months. After the analysis of inclusion and exclusion criteria, volunteers were selected by those who presented pain consequent of non-carious cervical lesions. Lesions were divided into nine groups (n=10), totalizing 90 treat and evaluated teeth: G1: Gluma Desensitizer (Heraeus Kulzer), G2: Low Level Laser with low dosage (Photon Lase, DMC, irradiations on three cervical vestibular points and an apical point: 30mW, 10J/cm2, 9 seconds per point, with the wavelength of 810nm, in three sessions with 72 hours intervals), G3: Low Level Laser with high dosage (one cervical point and an apical point application: 100 mW, 90 J/cm2, 11 seconds by point, with the wavelength of 810nm. Three sessions were performed with 72 hours interval), G4: Low Level Laser with low dosage + Gluma Desensitizer, G5: Low Level Laser with high dosage + Gluma Desensitizer, G6: Nd:YAG Laser (Power LaserTM ST6, Lares Research®, in contact made with the protocol of 1.0 W, 10 Hz and 100 mJ, 85 J/cm2, with the wavelength of 1064nm. Four irradiations were performed, each for 15 seconds, in mesio-distal and ocluso-apical directions, totaling an irradiation of 60 seconds with 10 seconds intervals), G7: Nd:YAG Laser + Gluma Desensitizer, G8: Nd:YAG Laser + Low Level Laser with low dosage, G9: Nd:YAG Laser + Low Level Laser with high dosage. The sensitivity level of each volunteer was analyzed by visual analog scale (VAS) with the aid of cold air stimuli and exploration probe in 5 minutes, 1 week, 1, 3 and 6 months after treatment. Data were collected and subjected to statistical analysis that detected statistically significant differences between the various times of studied (p<0,05). It was observed that for air stimuli, the protocol with Gluma Desensitizer and the Nd:YAG laser presented immediate effect of pain reduction, from the first moment of its application and irradiation, respectively. For low power lasers, it was observed that the effect of different dosages had been distinct; however both were efficient in reducing pain within 6 months of clinical follow-up. After this period, it was observed that the protocol with highest reduction of pain and minor increase throughout the time was the combination of the Gluma Desensitizer with the Nd:YAG laser. In conclusion, all protocols were effective in reducing dentinal hypersensitivity; however with different effects. The combination of treatments is also an interesting option for reducing dentin hypersensitivity. (AU)

• FAPESP's process: 10/13232-9 - In vivo evaluation of clinical protocols in the treatment of dentin hypersensitivity
• Grantee: Anely Oliveira Lopes
• Support Opportunities: Scholarships in Brazil - Master