The effect of acid concentration and etch time on morphology and tensile bond strength of primary dentin: An in vitro study.

BACKGROUND: There are conflicting results concerning the ideal time for etching primary dentin and its effect on the bond strength of adhesive restorative materials. AIM: To assess in vitro, the effect of varied acid concentration and etch time on the morphological features and tensile bond strength of primary dentin. MATERIALS AND METHODS: Forty healthy primary molars were prepared by exposing the dentin of the occlusal surface, creating a smear layer. A 3 mm × 3 mm test indow was demarcated, and specimens were randomly allocated to four groups (n = 10): Group 1A 10% phosphoric acid, 7 s; Group 1B 10% phosphoric acid, 15 s; Group 2A 37% phosphoric acid, 7 s and Group 2B 37% phosphoric acid, 15 s. Surface analysis was done using atomic force microscope and scanning electron microscope. For tensile bond strength evaluation, 24 specimens prepared as mentioned were mounted in acrylic blocks and allocated to four groups according to the prescribed etching protocol. Resin rods were bonded and tested in tension after 24 h (n = 6). Data were analyzed statistically using unpaired t-test. RESULTS: Etching of primary dentin using 37% phosphoric acid for 7 s produced the highest tensile bond strength of 9.51 ± 2.19 MPa. CONCLUSION: Etching time of 7 s may improve the adhesion of resin restorative materials with primary dentin.

Multidisciplinary Management of Chronic Atypical Facial Pain of Psychogenic Origin: A Unique Case Report.

AIM: The following case report discusses the diagnostic dilemma presented by and the multidisciplinary management of a patient with chronic atypical facial pain of psychogenic origin. BACKGROUND: Though oral health care professionals are primarily concerned with the treatment of somatic disorders of the orofacial region, there remains a particularly challenging need to identify, diagnose and treat various psychological and psychosomatic symptoms. CASE DESCRIPTION: This case report describes the management of a 13-year-old male patient with the chief complaint of pain and discoloration of the skin over the right side of the face for the last 5 months, who also demonstrated symptoms of chronic anxiety and social withdrawal. As no associated soft or hard tissue abnormalities could be identified, a diagnosis of atypical/psychogenic facial pain was established. The skin discoloration was diagnosed as pityriasis versicolor and treatment for the same commenced. Following the complete resolution of the skin lesion the patient was asymptomatic, and no longer anxious. CONCLUSION: Our role as dentists is to mitigate the suffering of patients and to improve their quality of life in collaboration with specialists in psychosomatic medicine. CLINICAL SIGNIFICANCE: This case highlights that dentists must be trained to treat not only teeth, but also attend to patient's psychosomatic symptoms. HOW TO CITE THIS ARTICLE: Naidu J, Bhattacharya P, Mendonsa JP, et al. Multidisciplinary Management of Chronic Atypical Facial Pain of Psychogenic Origin: A Unique Case Report. Int J Clin Pediatr Dent 2020;13(2):196-198.