Emre Tosun

Comparative Evaluation of Antimicrobial Effects of Er:YAG, Diode, and CO2 Lasers on Titanium Discs: An Experimental Study

PURPOSE This study examined carbon dioxide (CO(2); 10,600 nm), diode (808 nm), and erbium (Er):yttrium-aluminum-garnet (YAG; 2,940 nm) laser applications on Staphylococcus aureus contaminated, sandblasted, large-grit, acid-etched surface titanium discs and performed a comparative evaluation of the obtained bactericidal effects and the applicability of these effects in clinical practice. MATERIALS AND METHODS This study was carried out in 5 main groups: Er:YAG laser in very short pulse (VSP) emission mode, Er:YAG laser in short pulse (SP) emission mode, diode laser with a 320-nm fiber optic diode laser with an R24-B handpiece, and CO(2) laser. After laser irradiation, dilutions were spread on sheep blood agar plates and, after an incubation period of 24 hours, colony-forming units were counted and compared with the control group, and the bactericidal activity was assessed in relation to the colony counts. RESULTS The CO(2) laser eliminated 100% of the bacteria at 6 W, 20 Hz, and a 10-ms exposure time/pulse with a 10-second application period (0.8-mm spot size). The continuous-wave diode laser eliminated 97% of the bacteria at 1 W using a 10-second application with a 320-μm optic fiber, 100% of the bacteria were killed with a 1-W, 10-second continuous-wave application with an R14-B handpiece. The Er:YAG laser eliminated 100% of the bacteria at 90 mJ and 10 Hz using a 10-second application in a superpulse mode (300-ms exposure time/pulse). The Er:YAG laser also eliminated 99% to 100% of the bacteria in VSP mode at 90 mJ and 10 Hz with a 10-second application. CONCLUSIONS The results of this study show that a complete, or near complete, elimination of surface bacteria on titanium surfaces can be accomplished in vitro using a CO(2), diode, or Er:YAG laser as long as appropriate parameters are used.

Short-term results of prolotherapy in the management of temporomandibular joint dislocation.

ObjectiveProlotherapy, the rehabilitation of ligaments or tendons by induced proliferation of cells by using dextrose, is a noninvasive and effective method for the treatment of temporomandibular joint (TMJ) dislocation. The aim of this study was to evaluate the efficacy of prolotherapy method for the management of acute or chronic dislocation of TMJ. Materials and MethodsIn this study, 10 patients with TMJ dislocation (2 acute, 8 chronic) were examined retrospectively. All patients consisted of female patients, with a mean age of 28.4, who were treated with prolotherapy procedure. Differences of visual analog scale scores in quality of life, pain on function, and chewing function efficacy between sessions were investigated using the Wilcoxon t test and median values of sessions were evaluated using the Kruskal-Wallis H test. The amount of change at the maximum mouth opening occurring between the preoperative and postoperative values and the frequency of locking episodes were calculated, with results considered statistically significant at P < 0.05. ResultsPain on function scores were significantly decreased in all patients, and TMJ locking were not observed during the follow-up period. Maximum mouth opening exhibited a tendency to decrease, but it was not statistically significant. Also, clicking sound on function presented no significant change (P > 0.05). On the other hand, the visual analog scale scores for quality of life showed significant improvement in all patients (P < 0.05). ConclusionsThe results of this study show that prolotherapy can be used as an efficient, simple, and conservative method to treat TMJ dislocation.

Evaluation of sedation in oral and maxillofacial surgery in ambulatory patients: failure and complications

OBJECTIVES This study evaluated the failure and complication rates of sedation in ambulatory patients undergoing oral and maxillofacial surgery. MATERIALS AND METHODS This retrospective cohort study was carried out among 619 patients who had undergone maxillofacial surgical procedures under intravenous sedation with midazolam and fentanyl. Each patients age, American Society of Anesthesiologists (ASA) classification, systemic condition, surgical procedure, complications, and failures were recorded for evaluation. RESULTS A total of 400 patients with ASA I, 199 with ASA II, and 20 with ASA III between the ages of 9 months and 84 years were included in the study. The most common systemic disorders in our patients were mental retardation (35%), hypertension (19%), and epilepsy (15%). Evaluation of the cases revealed 9 complications (1.4%) and 9 sedation failures (1.4%). The complications were bradycardia, postoperative agitation and hallucination, drug reaction, vomiting and nausea, desaturation, and hypotension. CONCLUSIONS Our results in the oral and maxillofacial surgery clinic revealed low complication and failure rates.

An acoustical analysis of the effects of maxillary sinus augmentation on voice quality.

OBJECTIVE Increased experience in sinus lifting procedures has led to a number of literature reports, but the potential effects of sinus lifting on voice quality is not clearly addressed in clinical studies. The aim of this study was to objectively investigate the effects of sinus lifting on alterations in voice quality and, in particular, on vocal resonance. STUDY DESIGN A total of 17 patients who were in need of bilateral sinus augmentation were recruited. Acoustic analyses were performed before and after surgery. Volume changes in the sinuses were recorded before and after surgery using dental volumetric tomography. The Friedman test with Bonferroni correction was used to analyze the data. RESULTS Changes in the perturbation parameters of acoustic sound analysis were found to be statistically significant. CONCLUSIONS We recommend that all patients (especially voice professionals) be informed about the possible effects of sinus lifts on speech and voice alterations.

Effects of Piezoelectric Surgery on Bone Regeneration Following Distraction Osteogenesis of Mandible

Abstract The aim of this study is to compare the bone healing in the distraction gap following the osteotomy performed with piezoelectric and conventional devices for the distraction osteogenesis in the rabbit mandibles. Twelve rabbits were randomly divided into 2 groups; 6 for piezoelectric device and 6 for rotary instruments. After 3 days of latency period, distraction was started at a rate of 1 mm per day for 10 days. All the animals were sacrificed after 4 weeks of consolidation phase for histological and histomorphological evaluation. Histological evaluation revealed thick trabecular bone formation in all of the specimens. Inflammation scores were chronic minimal. The mean percentages of the bone area in distraction gap are 62% in group P and 57% in group R. However, the difference between 2 groups was not statistically significant (P > 0.05). Our results revealed a slight increase in bone formation in the distraction gap in piezo-osteotomy groups histologically though not statistically supported. However, there is still a need for more histological studies with larger sample sizes evaluating the bone structure following piezo-osteotomies.