High-speed Handpiece Research Articles

In vivo evaluation of tooth colour alterations during orthodontic retention: A split-mouth cohort study.

To assess in vivo colour alterations of teeth following removal of fixed orthodontic appliances during retention. The Department of Orthodontics at the Aristotle University of Thessaloniki. Forty-eight patients after orthodontic treatment. Debonding and cleaning procedures after orthodontic treatment were performed using two different carbide burs attached to a low or high-speed handpiece, respectively, in a non-blinded cohort study with split-mouth design. Spectrophotometric colour data of teeth were recorded: (a) after debonding, (b) three months later, prior to and following finishing with Soflex discs, and (c) after 1year. The CIE Lab colour parameters were measured for each tooth, and the corresponding ΔΕ differences were calculated. The effect on colour was assessed with 3-way mixed ANOVA and Bonferroni's comparisons test (a<0.05). Orthodontic debonding and cleaning procedures were found to have statistically significant effects on the CIE colour parameters of treated teeth, since the L* values decreased 0.6 units (P<0.001), a* values were stable (0.0 units) and b* values increased 1.4 units (P<0.001), during the first retention year. Finishing temporarily decreased the enamel colour differences. Total ΔΕ differences for all types of teeth measured ranged from 1.4 to 2.1 units. The greatest changes were exhibited during the first 3months in teeth on which high-speed rotary instruments were used (1.6 units). The clinical relevance of this study points out that the colour of natural teeth following removal of fixed orthodontic appliances changes in long-term.

Piezoelectric Device Versus Conventional Osteotomy Instruments in the Comparison of Three Different Bone Harvesting Methods: An Istomorphometric, Phonometric, and Chronometric Evaluation

This study was conducted to compare the bone cutting performance of the piezoelectric device with traditional drills in terms of cut execution time, environmental noise produced, surface morphology characteristics, and residual cell vitality of the bone samples. Two fresh pig jaws were obtained from a local slaughterhouse, and nine bone samples with a standard size (1 cm3) were harvested from each jaw: three using piezosurgery, three with a multiblade bur mounted on a surgical handpiece, and three with a diamond bur mounted on a high-speed handpiece, for a total of 18 samples. Two samples for each harvesting method were examined by scanning electron microscope (SEM), observing four surfaces per sample. For each surface observed, a count of the intertrabecular spaces was performed, and each space was evaluated as completely, partially, or unfilled by debris. Four samples per sampling method were examined by cell culture to evaluate residual cell vitality after cutting. The execution time of each osteotomy was measured with a stopwatch. The environmental noise was measured, at two different distances, with a phonometer. At SEM analysis, piezosurgery osteotomies showed 66% of totally free intertrabecular spaces on the cutting surface, statistically significantly higher than those on the multiblade bur (33%) and diamond bur (12%) cutting surfaces (P < .0005). Bone samples harvested with piezosurgery also demonstrated faster cell proliferation. Finally, piezosurgery generated less environmental noise, though it required longer cutting time. Piezoelectric technology is a valid alternative to rotating burs for osteotomy, demonstrating higher bone cell viability and a precise and silent, though slower, cut.

Evaluation of Time-Dependent Temperature Changes during Different Interdental Stripping Procedures by Thermal Imaging: An In Vitro Study.

To investigate the temperature changes in pulp chamber of incisor and canine teeth during different stripping procedures with thermal imaging. Intact and freshly extracted human permanent 40 maxillary lateral incisor, 40 mandibular canine and 40 mandibular incisor teeth were selected for this study. Diamond bur, tungsten carbide bur and perforated diamond-coated disc were used for interdental stripping in high and low speed handpieces by air and water cooling. Temperature changes and cooling time of the tooth groups were recorded by a thermal imaging system. Paired t test and one-way analysis of variance (ANOVA) tests were performed for intragroup and intergroup comparisons of temperature changes and cooling time values. Stripping procedures created a statistically significant temperature rise in all study groups (p < 0.05). For maxillary lateral incisors and mandibular incisors, the greatest temperature rise was calculated during stripping with tungsten bur and perforated disk under air cooling (p < 0.001), while no statistically significant difference was found between the temperature rise values of mandibular canine teeth during different stripping procedures (p = 0.053). The lowest temperature rise and cooling time values among all tooth groups were observed during stripping with diamond bur under water cooling and the longest cooling time values were detected during stripping with perforated disc under air cooling (maxillary incisor; p < 0.001, mandibular incisor; p < 0.05, mandibular canine; p < 0.05). For all tooth groups, stripping with diamond bur in a high speed handpiece under water cooling produced the lowest temperature rise in the pulp chamber and the shortest cooling time values among different stripping procedures.

Comparison of the sealing ability of Endocem mineral trioxide aggregate and Endoseal mineral trioxide aggregate as a furcal perforation repair material under the operating microscope: An in-vitro study

Objective: The aim of this study was to compare the sealing ability of pozzolan-based mineral trioxide aggregate (MTA) (Endocem) cement and pozzolan-based MTA (Endoseal) when used to repair the furcal perforations in permanent molars using the stereomicroscope. Materials and Methods: The study sample comprised forty-three recently extracted permanent molars. These teeth were placed in a 5.25% sodium hypochlorite solution for 24 h and washed with tap water. Access cavities were made using a #5 round bur in high-speed handpiece. Perforations were made in the center of the floor of the pulpal chamber using a round bur. The teeth were randomly assigned into three experimental groups based on the material used to seal the perforation: Group 1 – control group, Group 2 – Endocem MTA group, and Group 3 – Endoseal MTA group. The packed materials were allowed to set for 24 h. The samples were sectioned longitudinally, and the extent of marginal adaptation was measured by stereomicroscope. Kruskal–Wallis test was used for statistical analysis using SPSS software. Results: The difference in the mean length of dye penetration between groups was statistically significant. The pair-wise comparison was done between the three groups using Mann–Whitney U-tests as post hoc analysis, which reveals the difference between Group 1 and Group 2 was statistically significant P Conclusion: Endoseal MTA showed more microleakage than Endocem MTA. Therefore, within the limitations of this study, we suggest that Endocem has the potential to be used as a perforation repair material rather than Endoseal MTA.

Sound levels in conservative dentistry and endodontics clinic

Aim: The aim of this study was to evaluate the sound levels generated in dental clinics of Conservative Dentistry and Endodontics. Materials and Methods: A decibel-meter with digital readout was used to measure sound levels at different intervals at chairside and center of preclinical laboratory and undergraduate and postgraduate clinics. At chairside, recordings were made with the meter held near the operator's ear when only suction was being used, with the slow speed micromotor handpiece and while suction was used alongside the air rotor handpiece. The recordings at the center of the clinic were made with at least five operators working. Minimum and maximum readings during a 3 min interval were recorded. Results: The tabulated readings were statistically analysed by ANOVA and Tukey HSD comparison test. Conclusion: The authors concluded that the mean sound levels in the working clinics ranged from 54 dB[A] to 83.3 dB[A]. These were within the recommended range for dental equipment. With suction and high speed handpiece combination, the Postgraduate clinic was significantly noisier than the Undergraduate clinic at several time periods. Sound level measurements reported here raise some concerns for dentists' hearing health. The use of suction with and without accompanying handpiece use can produce noise sufficient to damage the user's hearing.

Socket-shield technique: the influence of the length of the remaining buccal segment of healthy tooth structure on peri-implant bone and socket preservation. A study in dogs

ObjectiveThe aim of this study was to evaluate the influence of the location and length of root pieces on buccal peri-implant bone width and socket preservation in socket shield technique. Material and methodsForty-eight dental implants (24 narrow and 24 regular platform internal hex implants) were placed in six dogs. The clinical crowns of teeth P2, P3, P4 and M1 were detached horizontally and removed from the underlying roots. Then the mesial root of each tooth was extracted and the distal root was degraded using a high-speed hand-piece with round bur, creating a concave shell of dentin cementum and periodontal ligament (PDL) connected to the buccal aspect of the socket. Remaining root fragments of different lengths were created: coronal (1/3); middle and coronal (2/3); full length (3/3). These were positioned all around the bone crest. Implants were placed at the center of the root sockets, 1–3mm deeper than the original root apex. RFA and histological evaluations were made at 4 and 12 weeks. Data underwent statistical analysis (p<0.05). ResultsAll 48 implants osseointegrated satisfactorily. On both buccal and lingual sides, the coronal (1/3) radicular fragment was attached to the buccal bone plate by physiologic periodontal ligament with less crestal bone resorption compared with middle (2/3) and whole root (3/3) groups for narrow and standard implants. ConclusionsWithin the limitations of this study, the results demonstrate that a small piece of root in the coronal part of the alveolus can protect the buccal, mesial and distal bone crest following the immediate placement of NeO narrow or NeO Standard Internal Hex implants.The thickness of peri-implant bone and the remaining root fragment together will provide a total thickness of >2mm. The technique would appear to be highly predictable, maintaining bone volume and reducing the risk of crestal bone resorption

Auxiliary UV light devices for removal of fluorescent resin residues after bracket debonding.

The purpose of this clinical report was to describe the detection of fluorescent resin residue after orthodontic bracket debonding with two UV light devices and analyze the surface morphology of enamel after 1 year. A 22-year-old woman had orthodontic brackets removed by a previous dentist; however, resin residue was left on the enamel of the maxillary teeth. After confirming the fluorescent property of the resin, different protocols were used for each half of the maxillary arch. The first method, a black light lens was attached to a light-curing device to detect resin fluorescence, followed by polishing with silicone rubber tips. The second method used a light emitting diode light system attached to and activated by a high-speed handpiece, followed by polishing with discs. Both methods were completed with diamond polishing paste applied with felt discs. Polyvinyl siloxane impressions were made initially, after residue removal, after finishing and after polishing for morphologic analysis. The results were evaluated with photographs and the scanning electron microscope images made of resin casts from the impressions. A follow-up was made after 1 year. Both methods yielded a satisfactory clinical outcome, with a smooth surface, acceptable surface gloss and minimal tooth wear. The use of a UV device that excites fluorescence is recommended for the controlled removal of resin residue on enamel. The controlled removal of resin residue from enamel after orthodontic treatment is challenging but can be improved with auxiliary methods for detecting resin residues. This clinical report describes two types of devices that excite fluorescent resins in a more rapid and precise technique to guide the practitioner in the controlled removal of residual resin on teeth.

Subcutaneous emphysema during removal of suture after intraoral surgery

Subcutaneous emphysema is relatively rare postoperative complication in the oral and maxillofacial region. Most cases reported in maxillofacial area relate to the use of high-speed handpiece. However, in this case, subcutaneous emphysema was caused by compressed air blow performed during suture removal. Cone-Beam Computed Tomography was conducted to evaluate the extent of diffusion bubbles.. In this report, we describe etiology, diagnosis, prevention and management of subcutaneous emphysema in the maxillofacial area.

Effect of full crown preparation with ultrasound instrument on marginal adaption: a randomized controlled trial

To study the effect of full crown ultrasound preparation on crown margin. Thirty-two patients with 35 units of full crown were randomly divided into 2 groups. Teeth in the experimental group were prepared with ultrasound diamond instrument while teeth in the control group were prepared with a high-speed hand piece with regular diamond burs. Teeth in both groups were restored using Zirconia full ceramic crowns. Then all patients were evaluated for morphology of finishing line, marginal adaptation and marginal gingival coloration in the proximal side after 6-month of follow-up, respectively. SPSS17.0 software package was used for statistical analysis. Marginal adaptation did not show significant difference between the experimental and control group (P>0.05). Morphology of finishing line and marginal gingival coloration in the proximal side showed significant difference (P<0.05). It is recommended to perform tooth preparations with ultrasound diamond instruments, which may produce significantly less marginal gingival coloration in the proximal margin after 6-month of follow-up.

Accuracy of artificial bone defects measurements on two cone beam computed tomography scanners. A comparative study

IntroductionSeveral CBCT systems are currently on the market variable in their image quality and ability to visualize anatomic structures. Those systems differ from each other in detector design, patient scanning settings, and data reconstruction parameters. Moreover, other scanning and reconstruction factors including scan field of view (FOV), voxel size and the number of basis projections used for reconstruction have significant influence on image quality in CBCT. The aim of this study is to compare two CBCT systems regarding their linear measurements accuracy. Materials and methodsEighteen bone defects were created in one dry skull by using a round diamond bur mounted on a high speed hand piece. The defects were fully injected with polyvinyl siloxane impression. The skull was scanned using Planmeca ProMax 3D (Planmeca, Helsinki, Finland) and i-CAT next generation (Imaging Sciences international, Hatfield, PA, USA). Images were uploaded to a third party software (On Demand, Cyber med Inc. South Korea) for applying the measurements. Several measurements of each rubber impression material were done using the measurement tool on the cross sectional images in order to determine the maximum diameter. Then the impression material was removed carefully from the mandible by a dental probe and all the rubber balls were measured with a digital caliber to determine the actual maximum diameter (gold standard). Numerical collected data were explored for normality by checking the data distribution. ResultsThe results of the present study showed that the overall measurements by Planmeca showed statistically significantly higher mean measurement than the standard reference while i-CAT measurements showed non-statistically significant difference from the standard reference at all areas and also regarding the overall measurement. Regarding the overall error measurement and error percentage; Planmeca showed statistically significantly higher mean error and error percentage than I-CAT. ConclusionCBCT is highly accurate and reproducible in linear measurements in the axial and coronal image planes and in different areas of the maxillofacial region. According to the findings of the present study I-CAT is recommended when the purpose of the CBCT scan is to measure linear distances. This will result in lower patient radiation dose and faster scan time.

Tooth sectioning for coronectomy: how to perform?

The aim of this study was to determine the increase in heat production, preparation time, and cutting surface quality of conventional, high-speed rotating instruments and piezoelectric preparation for coronectomy procedures. One hundred intact extracted molars were sectioned horizontally, sub-totally, 1mm under the cemento-enamel line with five methods: (1) tungsten carbide torpedo (TcT), (2) round (TcR) drills using a conventional speed surgical straight handpiece (< 40,000min-1), (3) tungsten carbide fissure (TcF), (4) diamond torpedo (DT) drills using a surgical high-speed, contra-angle handpiece (~ 120,000min-1), or (5) a saw-like piezoelectric tip (PT). Temperatures, preparation times, and cutting surface irregularities were registered and the differences were analyzed with ANOVA, Tukey's HSD post hoc test (temperature, time) and with chi-square test (irregular surface). Rotating instruments produced a maximal temperature increase of less than 1°C. TcF produced the least heat (ΔT = - 3.92°C to the baseline), while PT produced significantly the highest temperature increases (ΔT = 12.38°C, p < 0.001). Tungsten carbide drills were the fastest for coronectomy (from 55.9 to 64.3s), while DT (169.7s) while PT (146.8s) were significantly slower. TcT and TcR drills produced an irregular root surface more frequently. During coronectomy, rotating instruments produced entirely acceptable heat, while PT produced unacceptable temperatures. Tungsten carbide drills performed coronectomies effectively, but the diamond torpedo and PT seemed clinically questionable. Considering heat, speed, and the cutting surface quality simultaneously, TcF in a surgical high-speed handpiece seems to be the best choice for coronectomy. The correct insert can significantly reduce excessive heat and operation time during coronectomy procedures.

EFFECT OF USING Er: YAG LASER TOOTH PREPARATION ON MICROLEAKAGE OF PORCELAIN LAMINATE VENEERS

The Er: YAG laser was proven to successfully ablate enamel. This study was aimed to investigate the applicability of using this laser in preparing the enamel surface for porcelain laminate veneering in comparison with the high speed handpiece regarding the fracture strength loading of the veneers. Twenty human maxillary central incisors extracted were selected. They were divided into two equal groups [group I and group II], group I: High speed handpiece prepared specimens and group II: Er: YAG laser prepared specimens for measuring microleakage by a binocular stereomicroscope. The results of the microleakage assessment showed significant difference in the microleakage scores at the incisal margins of [Gr. I (group I)] the high speed handpiece compared to [Gr. II (group II)] the Er: YAG laser and significance comparing the microleakage scores at the cervical margins of both groups (Gr. I) and (Gr. II). Also, there were significant differences comparing incisal to those at the cervical margins of (Gr. I) the high speed handpiece, while in (Gr. II) the Er:YAG laser group, a marked significant difference were found between the microleakage scores at the incisal margins compared to the cervical margins. Conclusion: The difference in microleakage assessment between laser and the high speed hand piece specimens was significant and affect the longevity of the porcelain laminate veneers

Bicuspid Axial Wall Height Effect on CAD/CAM Crown Fracture Mode on Preparations Containing Advanced Total Occlusal Convergence.

To evaluate bicuspid axial wall height effect on the fracture mode of adhesively luted, all-ceramic CAD/CAM crowns with a 20° total occlusal convergence (TOC). Recently extracted premolars were randomly divided into 4 groups (n = 12) with all-ceramic crown preparations accomplished using a high-speed handpiece inserted into a milling device. Specimens were prepared containing occlusogingival axial wall heights of 3, 2, and 1 mm as well as a group containing a flat preparation surface with no axial wall height. All preparations contained a 20° TOC. Completed preparation surface area was determined, and preparation features confirmed using a digital measuring microscope. Scanned preparations (CEREC) were fitted with milled and crystallized lithium disilicate full coverage restorations and luted with a self-etching adhesive resin cement after hydrofluoric acid etching and silanation. All manufacturer recommendations were followed. Specimens were stored at 37°C/98% humidity for 24 hours. Specimens were tested to failure at a 45° angle to the long axis of the tooth root on a universal testing machine. Failure load was converted to MPa using the available bonding surface area with mean data analyzed using Kruskal-Wallis/Dunn's (p = 0.05) RESULTS: The 3 mm preparation height specimens were similar to the 2 mm specimens, and both demonstrated significantly stronger failure load than the 1 mm axial wall height and flat preparation specimens. The flat preparation and 1 mm axial wall height specimens all failed adhesively, while the 2 mm and 3 mm specimens failed largely due to tooth fracture. Further evidence is provided that CAD/CAM adhesive techniques may compensate for less than ideal preparation features. Under the conditions of this study, bicuspid preparations with a 20° TOC restored with adhesively luted, CAD/CAM e.max CAD crowns require at least 2 mm of axial wall height, but further planned fatigue studies are necessary before definitive recommendations can be made.

Comparative Clinical Evaluation of Resin-based Pit and Fissure Sealant and Self-adhering Flowable Composite: An In Vivo Study

AimThe study evaluated the use of self-adhering flowable composite as a fissure sealant and compared it with a resin-based pit and fissure sealant.Materials and methodsForty children were selected for the study and all their four permanent first molars were subjected to fluoride free pumice oral prophylaxis. Their occlusal fissures were then prepared with fissurotomy bur using high-speed handpiece under cotton roll isolation and low volume suction. Simple random sampling was done and accordingly a child either received either a resin-based fissure sealant or a self-adhering flowable composite on the prepared fissure. All the restorations were clinically evaluated using Ryge’s direct evaluation criteria for four times i.e., immediately after the treatment, at the end of 3rd, 6th and 12th month. The retention was evaluated using Horowytz criteria.ResultsThe retention rate of Dyad flow after one year was significantly higher than that of Helioseal-F (p = 0.015). The marginal integrity of Dyad Flow was significantly better than that of Helioseal-F during every evaluation period (p < 0.05). Both retention and marginal integrity of both sealants were similar in maxillary and mandibular molars at all evaluation periods.ConclusionDyad flow can be used as an alternative to the conventional fissure sealant.Clinical significanceIn pediatric dentistry, where shorter appointment time is warranted, the self-adhering composite has the edge over conventional fissure sealant.How to cite this article: Wadhwa S, Nayak UA, Kappadi D, Prajapati D, Sharma R, Pawar A. Comparative Clinical Evaluation of Resin-based Pit and Fissure Sealant and Self-adhering Flowable Composite: An In-vivo Study. Int J Clin Pediatr Dent. 2018;11(5):430-434.

A video eyeglasses/earphones system as distracting method during dental treatment in children: A crossover randomised and controlled clinical trial.

In this crossover clinical trial, 36 Frankl scale II and III children aged 5-8 years received different dental procedures in two sessions, with and without the VEES system. In the control visit, they were not exposed to this distraction stimulus, but traditional non-aversive behaviour management was applied. Each dental session was divided into four phases (explanation, anaesthetic injection, rubber-dam/clamp placement, and high-speed hand piece work for 5 min). Pain in each treatment phase was assessed by the following measurements: the Face, Legs, Activity, Cry, Consolability (FLACC) scale. Pulse rate, and oxygen saturation measurements were employed to evaluate the state of anxiety. Comparison of the outcomes of two interventions were statistically analysed through the Wilcoxon Signed-rank Test. There were no statistical differences between the results of the two interventions (VEES vs. no VEES/behavioural management) during the four treatment phases on assessment by any of the measurements employed. The VEES method was not more effective than traditional non-aversive behavioural techniques for reducing anxiety and pain perception in children undergoing dental treatment.

The influence of different autoclaving steralization parameters on the performance of dental handpieces

Objective To discuss the influence of different autoclaving on performance of dental handpieces to provide evidence for the clinical choices of proper dental instrument sterilization procedures. Methods Orthogonal experiment method was adopted.45 totally new high-speed dental handpieces were randomly divided into 9 groups according to the three factors of autoclaving, including sterilizing temperature (132 ℃, 134 ℃ , 136 ℃), sterilizing duration(4 min, 5 min, 6 min, ) and desccination time (10 min, 15 min, 20 min) by the method of three factors-levels.All these high-speed dental handpieces were sterilized, and number of maintenance in 8 months was recorded and the three factors was analyzed. Results Each handpiece experienced 1 060 times of autoclaving in 8 months.Variable A (sterilizing temperature) P 0.05. Conclusion Autoclaving temperature and duration time had impact on the performances of dental handpieces.Desiccation time showed less obvious effect on performances of handpieces. Key words: Dental handpieces; High-pressure steam sterilization; Temperature; Time; Usability

Preparation Ferrule Design Effect on Endocrown Failure Resistance.

To evaluate the effect of preparation ferrule inclusion with fracture resistance of mandibular molar endocrowns. Recently extracted mandibular third molars were randomly divided into 3 groups (n = 12) with the coronal tooth structure removed perpendicular to the root long axis approximately 2 mm above the cemento-enamel junction with a slow-speed diamond saw. The pulp chamber was exposed using a diamond bur in a high-speed handpiece with pulpal remnants removed and canals instrumented using endodontic hand instruments. The chamber floor was restored using a resin core material with a two-step, self-etch adhesive and photopolymerized with a visible light-curing unit to create a 2 mm endocrown preparation pulp chamber extension. One and two millimeter ferrule height groups were prepared using a diamond bur in a high-speed handpiece following CAD/CAM guidelines. Completed preparation surface area was determined using a digital measuring microscope. Scanned preparations were restored with lithium disilicate restorations with a self-adhesive resin luting agent. All manufacturer recommendations were followed. Specimens were stored at 37°C/98% humidity and tested to failure after 24 hours at a 45° angle to the tooth long axis using a universal testing machine. Failure load was converted to MPa using the available bonding surface area with mean data analyzed using Kruskal-Wallis/Dunn (p = 0.05). Calculated failure stress found no difference in failure resistance among the three groups; however, failure load results identified that the endocrown preparations without ferrule had significantly lower fracture load resistance. Failure mode analysis identified that all preparations demonstrated a high number of catastrophic failures. Under the conditions of this study, ferrule-containing endocrown preparations demonstrated significantly greater failure loads than standard endocrown restorations; however, calculated failure stress based on available surface area for adhesive bonding found no difference between the groups. Lower instances of catastrophic failure were observed with the endocrown preparations containing 1 mm of preparation ferrule design; however, regardless of the presence of ferrule, this study found that all endocrown restorations suffered a high proportion of catastrophic failures but at loads greater than reported under normal masticatory function.

Designing high-speed dental air-turbine handpiece by using a computational approach

The high-speed dental air-turbine handpieces are widely used in the dentistry as a tool for cutting and drilling a tooth. The impeller of the air-turbine handpiece rotates a cutting bur through the compressed-air. Two dental handpieces which have standard type head (Model 1) and torque type head (Model 2) were designed using computational analysis. The advanced existing high-speed dental air-turbine handpieces were investigated to compare with the designed dental handpieces. The computational domain of the air-turbine was investigated using ANSYS CFX software. The impeller blade type which has high torque value was selected to design the air-turbine impeller. The performance of the designed handpieces was verified through the measurements and the pre-clinical tests. The results showed that the newly designed handpieces had excellent performance which is compatible with existing advanced handpieces.

Iatrogenic displacement of high-speed bur during third molar removal

Surgical removal of impacted mandibular third molar is a routine procedure in oral surgery. Various iatrogenic complications related to the procedure has been discussed well in the literatures before. Some...

IDENTIFIKASI BAKTERI PADA AIR DI WATERLINE (SALURAN AIR) DENTAL UNIT RUMAH SAKIT GIGI DAN MULUT (RSGM) FAKULTAS KEDOKTERAN GIGI UNIVERSITAS ANDALAS

Infection control was an effort to prevent the spread of microorganisms, both from patient to another, the patient to the operator, the operator to patients, operators and the environment to the environment to the patient. Effective infection control was one of the important indicators show the achievement of the implementation of oral health care was good. This study aimed to quantified the number of colonies and identified the bacteria in the water that pass through the Dental Unit Waterline (DUWL) in the dental unit Dental Hospital Faculty of Dentistry, Andalas University. The research did with patch the water from a high-speed handpiece, water syringe and ultrasonic scaler. Based on the study formula Federer (2007) gained as much as 9 samples in one group of tools. Thus, the samples totaling 27. Samples were obtained using simple random method. Colony counting and identificated of bacteria carried in Health Laboratory the West Sumatra Regional using blood Agra media. The results showed that there were 22 samples of water contaminated by bacteria, 4 of which were not in accordance with ADA standards. Gram-positive cocci bacteria contamination as much as 8 samples and Gram-negative bacilli as many as 16 samples. Klebsiella pneumoniae bacteria found in two samples of water through the water syringe. Thus, the dental unit waterline on the dental unit has potential as a source of microorganisms, particularly bacteria.&#x0D; Keywords:Control infection, bacterial contamination, dental unit waterline, high-speed handpiece, water syringe and ultrasonic scaler