Fatih Oznurhan

Evaluation and comparison of mineral trioxide aggregate and biodentine in primary tooth pulpotomy: Clinical and radiographic study

Objectives: Pulpotomy is the common therapy for cariously exposed pulps in symptom-free primary molar teeth. For many years, researchers have searched for an ideal material that allows regeneration of the residual pulp. The purpose of this study was to evaluate the efficacy of mineral trioxide aggregate (MTA), Biodentine as a pulpotomy medicament in primary teeth, both clinically and radiographically.Materials and Methods: A total of 25 children (50 human primary molar teeth) aged between 5 and 9 years were selected in this randomized clinical study. The patients were randomly assigned to receive the pulpotomy medicaments in either [Group 1]: MTA or [Group 2]: Biodentine. All pulpotomized teeth were restored with stainless steel crowns and evaluated clinically and radiologically at 1, 3, 6 and 12 months. Statistical analysis using Mann–Whitney U test and Fishers exact test, and chi-square test was performed to determine the significant differences between the groups. Results: Clinical and radiological success rates were 96 and 80% in Group 1 and 96 and 60% in Group 2, respectively. There were no significant differences between the groups (P > 0.05). The radiographic success rates decreased in the controls, but there were no significant differences. Conclusion: Biodentine showed similar clinical and radiographic results as MTA in the 12-month evaluation and can be safely used as a pulpotomy medicament.

Clinical evaluation of apex locator and radiography in primary teeth

AIM The aim of this in vivo study was to evaluate the accuracy and reliability of electronic apex locater and radiographic determination of root canal length in primary teeth. METHODOLOGY A total of 32 human primary molar teeth (96 roots) were selected. After endodontic access preparation, root canals were irrigated with physiological saline solution. The access cavities were dried with cotton pellets and, the roots were dried with paper points before performing the electronic measurement. The root canal length measurements were first taken with an apex locater (EndoMaster), and then, a size ♯ 15 K-file was inserted into the root canal, and radiography was taken to determine the working length measurements. The measurement data were recorded and compared by one-way anova and Kruskal-Wallis tests. P < 0.05 was accepted for the significance. RESULTS The mean values for radiography were 13.23 ± 1.92 mm and for EndoMaster were 13.08 ± 1.77 mm. The accuracy of EndoMaster was 80.2% in correct measurements ±1 mm (P < 0.001). CONCLUSION The electronic apex locators could be useful in determining working length and thereby decreasing the need for radiographs and exposure to ionizing radiation in pediatric dental patients.

Peripheral ossifying fibroma associated with actinomycosis

Many types of localized reactive lesions may occur on the gingiva, including focal fibrous hyperplasia, pyogenic granuloma, peripheral giant cell granuloma and peripheral ossifying fibroma (POF). Clinically differentiating one from the other as a specific entity is often not possible. Histopathological examination is needed in order to positively identify the lesion. The POF is one such lesion, which is a reactive gingival overgrowth occurring frequently in the maxillary anterior region in teenagers and young adults. They are pink to red in color, and commonly associated with poor oral hygiene and early periodontal disease. We report in this study, the clinical report of a 12-year-old male patient with a POF in the maxilla associated with actinomycosis infection. Based on the clinical and histopathological evaluations, the diagnosis was concluded as POF. Clinical, radiographical and histological characteristics are discussed and recommendations regarding treatment and follow-up are provided.

Effects of different cavity‑disinfectants and potassium titanyl phosphate laser on microtensile bond strength to primary dentin

AIM The aim of this in vitro study was to compare the effects of different cavity-disinfectants and potassium titanyl phosphate (KTP) laser on microtensile bond strength to primary dentin. Chlorhexidine (CHX), propolis (PRO), ozonated water (OW), gaseous ozone (OG) and KTP laser were used for this purpose. METHODOLOGY Twelve primary molar teeth were used in this study. One-third of the teeth (from coronal portion) were removed to obtain flat surfaces. After applying the cavity-disinfectants, an adhesive (prime and bond NT) was applied to dentin surfaces, and composite crowns were built up. One group received no pretreatment and was set as a control (CONT). Ten sticks were obtained from these samples and were stressed in tension until failure using a universal testing machine and the data were recorded. RESULTS The mean strength values (in MPa) of the sticks were OW (11.12) > KTP (9.58) > CHX (7.58) > PRO (7.42) > CONT (6.38) > OG (5.84) and OW showed significantly higher results than the other groups, except KTP group (P < 0.05). CONCLUSIONS OW and KTP might be used safely without compromising the bond strength of restorative materials.

Influence of erbium: Yttrium-aluminum-garnet laser, potassium titanyl phosphate laser irradiation, and acid etch on microtensile bond strength of adhesives

The aim of this study was to evaluate the microtensile bond strength (μTBS) of one layer or two-layer applications of single bond (SB) and prime & bond (PB) which prepared with erbium: Yttrium-aluminum-garnet (Er:YAG) laser, potassium titanyl phosphate (KTP) laser, and acid-etched dentin. Various surface pretreatments have been developed to have better adhesion to dentine. However, the effects of laser-etch and acid-etch on adhesion with various applications of bonding agents have not yet been achieved. Twenty-four human third molar teeth were used in this study. One-third of the teeth were removed; then the teeth divided into three groups and two subgroups randomly. After Er:YAG laser, KTP laser, and acid-etch applied to dentine, SB and PB applied one or two layer for the subgroups. Waiting in distilled water for 24 h, the teeth were sectioned to sticks and the sticks were stressed in tension until failure using a microtensile testing machine. The data were collected in SPSS for statically analysis with three-way ANOVA and independent sample t-tests at the confidence interval of 95%. The highest μTBS values were in Er:YAG laser and PB group in one-layer application. The Er:YAG laser can be useful to obtain high μTBS values. Applying a second consecutive coat of adhesive showed decreased μTBS values and KTP laser was not effective to obtain an increased μTBS values.