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American Journal of Dentistry Oct 2022This retrospective clinical study evaluated, by radiographic analysis, the effect of unfiltered and filtered tobacco cigarette smoking on marginal bone loss (MBL) in the... (Clinical Trial)
Clinical Trial
PURPOSE
This retrospective clinical study evaluated, by radiographic analysis, the effect of unfiltered and filtered tobacco cigarette smoking on marginal bone loss (MBL) in the subjects with dental implants.
METHODS
In a 4-year retrospective clinical study, 419 dental implants were placed in 188 subjects aged 23-76 years who underwent implant-supported fixed prosthetic restorations. The effects of gender, implant length, implant diameter, implant location, and use of unfiltered and filtered tobacco cigarettes on marginal bone were investigated. MBL was analyzed on the mean, mesial, and distal surfaces of dental implants on periapical radiographs. The results of the data were statistically analyzed with ANOVA and Tukey test.
RESULTS
A significant correlation was found between MBL difference and gender, implant length, and implant location (P< 0.05). Smokers had significantly higher MBL than nonsmokers, both within and between groups (P< 0.05). There was a significant difference in MBL in the mesial region in unfiltered cigarette smokers compared to filtered cigarette smokers (P= 0.013). There was a significant increase in MBL in the mesial and distal region compared to heavy smokers of cigarettes without filters (>20 cigarettes/day) and heavy smokers of cigarettes with filters (>20 cigarettes/day) (P< 0.05).
CLINICAL SIGNIFICANCE
In this study, tobacco smoking had a negative effect on marginal bone loss. There was a significant increase in marginal bone loss on the mesial and distal surfaces, especially in unfiltered heavy tobacco smokers (>20 cigarettes/day).
Topics: Humans; Dental Implants; Alveolar Bone Loss; Retrospective Studies; Follow-Up Studies; Tobacco Products
PubMed: 36261406
DOI: No ID Found -
Scientific Reports Nov 2021This retrospective pilot study used a newly developed evaluation tool to assess the prevalence and incidence of White Spot Lesions (WSL) before and after multibracket...
This retrospective pilot study used a newly developed evaluation tool to assess the prevalence and incidence of White Spot Lesions (WSL) before and after multibracket appliance (MB) therapy. Digital photographs of 121 adolescent patients (63 ♂, 58 ♀) with metal brackets were analyzed retrospectively before and after MB therapy. The labial surfaces of anterior teeth, canine teeth, and premolars in the upper (UJ) and lower jaws (LJ) were evaluated using the Enamel Decalcification Index (EDI) by Banks and Richmond (Eur J Orthod, 16(1):19-25, 1994, levels 0-3) and a specially developed digitally scaled graticule with concentric circles to quantify the extent of WSL (in %). The statistical data analysis was based on crosstabulations and logistic regression. Before MB, 69.4% of the patients presented at least one WSL and 97.5% after, an increase of 28.1%. Before MB, 18.4% of the tooth surfaces (TS) showed an EDI level of 1-3. After MB, 51.8% of the TS featured WSL. 18.2% of the TS showed a WSL to the extent of ≥ 20-100% before and 52.3% after MB. The incidence in the UJ (71-79%) as well as the LJ (64-76%) was highest for the first and second premolars and lowest for LJ incisors (22-35%). The probability for developing a new distal WSL is higher than developing gingival, mesial or occlusal WSL. Labial MB therapy drastically increases the risk of developing WSL. We verified a concise quantification of the extent of labial WSL with the evaluation index.
Topics: Adolescent; Dental Caries; Dental Caries Susceptibility; Female; Humans; Male; Orthodontic Brackets; Photography, Dental; Pilot Projects; Retrospective Studies; Tooth Demineralization
PubMed: 34725354
DOI: 10.1038/s41598-021-00561-7 -
Brazilian Oral Research 2020This study analyzed the effect of prior application of copaiba oil (CO) emulsions as a dentin cleaning substance on microleakage and microtensile adhesive strength....
This study analyzed the effect of prior application of copaiba oil (CO) emulsions as a dentin cleaning substance on microleakage and microtensile adhesive strength. Twenty-five premolars and sixty-four molars were used for microleakage and microtensile assays. For the microleakage assays, specimens with standard class V cavities were divided (n = 5), according to the tested CO emulsions: CO10%X, CO10%Y, and CO10%Z, as well as chlorhexidine 2% (CHX) and distilled water (DW), as positive and negative controls, respectively. Restorations were performed using the Adper Single Bond® and/or Clearfil SE Bond® systems. Cervical, occlusal, distal and mesial sections were assessed for tracer penetration degree at the composite/tooth interface. For the microtensile assay, healthy molars were divided into sixteen groups, in which artificial caries were induced in half of the groups. Dentin surfaces were treated with CO10%X and CO10%Y, CHX and DW. Microtensile bond strength was measured by fixing each sample to the plate of a universal testing machine operated at a speed of 0.5 mm/minute until failure. Dentin treated with CO10%X showed a lower infiltration rate than dentin treated with the other CO emulsions, CHX2% and DW. According to the microtensile assay, both healthy and affected dentin treated with CO10%X and Adper Single Bond® adhesive system presented higher adhesive strength. CO emulsion, used as a dentin biomodifier, interfered positively in microleakage and improved adhesive strength after acid etching in the Adper Single Bond® adhesive system, or before applying the Clearfil SE Bond® self-etching system.
Topics: Analysis of Variance; Chlorhexidine; Composite Resins; Dental Bonding; Dental Cements; Dental Leakage; Dentin; Dentin-Bonding Agents; Emulsions; Fabaceae; Humans; Materials Testing; Plant Oils; Reproducibility of Results; Resin Cements; Statistics, Nonparametric; Surface Properties; Tensile Strength
PubMed: 32022221
DOI: 10.1590/1807-3107bor-2020.vol34.0001 -
Clinical Oral Implants Research Jan 2023To evaluate the association between different vertical levels of the abutment margin and residual cement prevalence in cement-retained implant restorations with... (Observational Study)
Observational Study
OBJECTIVES
To evaluate the association between different vertical levels of the abutment margin and residual cement prevalence in cement-retained implant restorations with customized abutments.
METHODS
One hundred and nine single-unit cement-retained implant restorations with a screw-access channel were included. The crowns were intraorally cemented on the abutments, and excess cement was removed. The abutment-crown complex was unscrewed, and the abutment-crown complex and peri-implant tissue were photographed. Residual cement presence was recorded by dividing the abutment-crown complex and peri-implant tissue into four quadrants: mesial, distal, buccal, and lingual. The prevalence of residual cement was compared according to the height of the custom abutment margin of the corresponding quadrant. A multilevel model was used for statistical analysis (α = .05).
RESULTS
Cement remnants were discovered on 72.48% of the dental implants. When the restoration quadrants were compared, cement remnants were present on 51.38%, 39.45%, 20.18%, and 17.43% of the mesial, distal, buccal, and lingual surfaces, respectively (p < .01). Regarding the abutment margin level, cement residues were found in 60.22% and 61.4% of the 0.5 mm subgingival and ≥1 mm subgingival margin groups, respectively, which were significantly more than those in the supragingival (23.65%) and equigingival (26.59%) margin groups (p < .01). After adjustment for confounding factors, the adjusted odds ratio (with 95% confidence interval) for residual cement in the subgingival margin groups was 3.664 (1.71, 7.852) when compared to the supragingival and equigingival margin groups.
CONCLUSIONS
The risk of residual cement occurrence was 3.66-fold higher with a subgingival abutment margin than with supragingival and equigingival abutment margins.
Topics: Cementation; Dental Implants; Dental Abutments; Dental Prosthesis, Implant-Supported; Dental Cements; Glass Ionomer Cements; Crowns
PubMed: 36278423
DOI: 10.1111/clr.14015 -
PloS One 2020To assess and compare the enamel surface quality after interproximal enamel reduction (IPR) was performed with different systems and to study the relation between acid... (Comparative Study)
Comparative Study
OBJECTIVES
To assess and compare the enamel surface quality after interproximal enamel reduction (IPR) was performed with different systems and to study the relation between acid penetration depth and enamel surface quality as well as the importance of remineralization.
METHODS
Sixty-five extracted teeth were randomly allocated to five experimental groups: untreated control, manual with New Metal Strips, mechanical with oscillating segment (OS) discs, Safe-Tipped Bur Kit, and the Ortho-Strip, followed by 30 s of polishing with the Softflex system and the Compo-system after treating the tooth with OS discs. Mesial surfaces were demineralized for 24 h and distal surfaces were subjected to interchanging demineralization and remineralization cycles of 24 h each for 18 days. The analysis was carried out by profilometry, scanning electron microscopy, and polarization microscopy.
RESULTS
After IPR and polishing, enamel roughness was reduced for all systems tested except for the Essix Safe-Tipped Bur Kit. Subsequent demineralization increased enamel roughness in all groups except controls beyond the original level prior to IPR except for IPR with New Metal Strips or Ortho-Strips and subsequent polishing. Cyclic demineralization and remineralization for 18 days yielded a reduction in acid penetration depth and an increase in surface smoothness, which correlated with each other only for controls and treatment with New Metal Strips or Ortho-Strips.
CONCLUSIONS
Manual IPR, using New Metal Strips and, even more, the oscillating IPR system Ortho-Strips, yielded smoother interproximal enamel surfaces and less acid penetration depth than the IPR systems with OS discs and the Safe-Tipped Bur Kit after polishing and 18 days of cyclic demineralization and remineralization. Irrespective of the IPR procedure, proper remineralization of IPR-treated surfaces is advisable to reduce caries susceptibility.
Topics: Dental Enamel; Dental Etching; Humans; Microscopy, Electron, Scanning; Microscopy, Polarization; Surface Properties; Tooth
PubMed: 32119700
DOI: 10.1371/journal.pone.0229595 -
Journal of Long-term Effects of Medical... 2022This case series study evaluated the survival, success rate and marginal bone remodeling of Morse taper hydrophilic implants placed for full-arch rehabilitations over a...
This case series study evaluated the survival, success rate and marginal bone remodeling of Morse taper hydrophilic implants placed for full-arch rehabilitations over a 1-year follow-up period. Ten patients in need of maxillary and/or mandibular full-arch rehabilitation were selected. Sixty-six Morse taper implants and sixty-six abutments were inserted. All implants were placed using a surgical flap approach without bone regeneration and were immediately loaded with definitive prostheses according to the passive fitting technique. The patients underwent clinical and radiographic follow-up at different postoperative periods: T0 = immediate (up to 1 month after surgery); T1 = 3-4 months after surgery; T2 = 6-8 months after surgery; and T3 = 1 year after surgery. The survival and success rate of the implants and the marginal bone remodeling were evaluated. Normal distribution of the outcomes was verified by Kolmogorov-Smirnov tests. Therefore, changes in vertical and horizontal marginal bone levels were assessed with paired t-tests. Results were considered significant for P < 0.05. Survival and success rates of 100% and 92.4%, respectively, were observed. Statistically significant vertical bone level changes were shown for all periods. From T0 to T3, there was a mean difference in vertical bone loss of -1.02 mm on the mesial surface and of -0.93 mm on the distal surface, for horizontal bone loss in the same period, it was observed mean changes of -0.14 mm on the mesial surface and -0.09 mm on the distal surface. This 1-year case series follow-up of immediate full-arch rehabilitation, using one-step hybrid passive fitting supported by four to six hydrophilic tapered implants, suggests predictability with high survival and success rates in edentulous patients.
Topics: Bone Remodeling; Dental Implantation, Endosseous; Dental Implants; Follow-Up Studies; Humans; Maxilla; Prostheses and Implants; Treatment Outcome
PubMed: 35993992
DOI: 10.1615/JLongTermEffMedImplants.2022042402 -
Clinical Oral Investigations Feb 2022To investigate tooth wear in young adults, intraoral scanning was used for digital monitoring of the mandibular first molar over 12 months. A possible influence of...
OBJECTIVES
To investigate tooth wear in young adults, intraoral scanning was used for digital monitoring of the mandibular first molar over 12 months. A possible influence of aetiological factors obtained by a questionnaire on tooth wear was investigated.
MATERIALS AND METHODS
A total of 109 participants (mean age at the start of the study: 21.0 ± 2.2 years) were included in this clinical study. At baseline (T0), an intraoral scan (Trios 3, 3Shape) of the study tooth (FDI # 36 or #46) was conducted. After a mean observation period of 373 ± 19 days, a second intraoral scan (T1, n = 94) of the same tooth as at T0 was performed and standard tessellation language datasets were superimposed with 3D analysis software (GOM Inspect). The occlusal surface of the study tooth was divided into 7 areas (5 cusps, 2 ridges) and maximum vertical substance loss was measured between T0 and T1 (n = 91). Three types of tooth wear were defined: cupping (C), facet (F) and combined cupping-facet (CF). Furthermore, a questionnaire on aetiological factors, such as dietary behaviour, was filled out at T0. Data were analysed with non-parametric tests (p < 0.05).
RESULTS
Only one study tooth exhibited no tooth wear at T0, whereas 3 teeth showed C, 47 teeth F and 40 teeth CF. A progression of vertical substance loss for all three types was shown. Most affected were the mesiobuccal cusps (43, 38/47 µm; median, 95%CI) followed by distobuccal (36, 33/39 µm), mesiolingual (35, 26/40 µm), distolingual (34, 27/36 µm) and distal (31, 25/34 µm). On mesial and distal ridges, only F was detected with the lowest vertical substance loss of all areas (mesial ridge: 0, 0/0 µm; distal ridge: 0, 0/0 µm). An association between aetiological factors and loss values could not be shown.
CONCLUSIONS
All study teeth showed clear signs of wear, and after only 1 year, further substance loss was detectable. This result is of significance for young adults.
CLINICAL RELEVANCE
Since data of young adults regarding tooth wear are scarce, the results give a first idea of the amount of vertical loss per year and its relation to aetiological factors such as dietary behaviour. Therefore, further studies over a longer observation period are highly recommended.
Topics: Humans; Incisor; Molar; Tooth Attrition; Tooth Wear; Young Adult
PubMed: 34498100
DOI: 10.1007/s00784-021-04162-6 -
International Journal of Computerized... Nov 2022To evaluate the accuracy of tridimensional (3D)-printed guide-assisted flapless cortical bone micro-osteoperforations (MOPs) in the anterior mandible on a cadaver model.
AIM
To evaluate the accuracy of tridimensional (3D)-printed guide-assisted flapless cortical bone micro-osteoperforations (MOPs) in the anterior mandible on a cadaver model.
MATERIALS AND METHODS
Five human cadaver heads with complete dentition in the anterior mandible were used in the present study. Preplanning CBCT and intraoral surface scans were obtained. After alignment, drilling sites in the interradicular areas were planned from canine to canine, and a surgical guide was printed. The drilling was performed and a postprocedure CBCT scan was obtained to assess the accuracy of the procedure in relation to the virtual planning.
RESULTS
The mean ± standard deviation (SD) mesiodistal interradicular space was 2.67 ± 0.84 mm. The mean ± SD error of the actual drilled hole compared with the planned position of the mesial drill site was 0.66 ± 0.33 mm, and to the distal drill site it was 0.56 ± 0.33 mm. There was a statistically significant difference between the number of times the teeth were hit mesially (10 out of 64 holes) and distally (none).
CONCLUSIONS
The proposed technique, limited to an ex vivo scenario, provides a valid and reliable method for mandibular MOPs using a 3D-generated surgical guide. However, the risk of damaging adjacent radicular surfaces, particularly in areas with limited mesiodistal interradicular bone, needs to be considered. Further studies should focus on using thinner drills and adding other methods to stabilize the guide. Additionally, by selecting individuals and perforation sites with more mesiodistal interradicular bone, less damage is likely. (Int J Comput Dent 2022;25(4):387-0; doi: 10.3290/j.ijcd.b2599841).
Topics: Humans; Cone-Beam Computed Tomography; Surgery, Computer-Assisted; Mandible; Printing, Three-Dimensional; Cadaver
PubMed: 35072427
DOI: 10.3290/j.ijcd.b2599841 -
The Journal of Oral Implantology Aug 2019This study aimed to investigate the effects of the luting methods on the amount of cement remnants in implant restorations and to determine the restoration surface with...
This study aimed to investigate the effects of the luting methods on the amount of cement remnants in implant restorations and to determine the restoration surface with the maximum amount of residual cement. Forty abutments and crowns were divided into 4 groups as follows: TB group, luting with zinc oxide-eugenol cement; TBV group, luting with zinc oxide-eugenol cement after application of a separating agent over the transmucosal area of the abutment; PI group, luting with methacrylate cement; and PIV group, luting with methacrylate cement after application of a separating agent. After cementation, all the quadrants of the specimens were photographed, and the amount and location of the cement remnants were statistically analyzed ( ≤ .05). The amount of cement remnants was significantly smaller in the groups with a separating agent. The type of luting material did not significantly affect the results. Cement remnants were more abundant on the mesial and distal sides than on the buccal and lingual sides of the restoration.
Topics: Cementation; Crowns; Dental Abutments; Dental Cements; Dental Prosthesis, Implant-Supported
PubMed: 31008680
DOI: 10.1563/aaid-joi-D-18-00283 -
American Journal of Orthodontics and... Dec 2021In this study, we compared achieved and predicted crown movements of maxillary and mandibular first molars, canines, and central incisors in adults after 4 first...
INTRODUCTION
In this study, we compared achieved and predicted crown movements of maxillary and mandibular first molars, canines, and central incisors in adults after 4 first premolar extraction treatment with Invisalign.
METHODS
Seventeen adult patients who received 4 first premolar extraction treatment with Invisalign and completed the first series of aligners were included. Superimposition of pretreatment and actual posttreatment dental models was acquired using registrations of pretreatment and posttreatment craniofacial models on the basis of bone surfaces and registrations of craniofacial and dental models on the basis of dental crown surfaces, respectively. Superimposition of pretreatment and predicted posttreatment models was acquired from ClinCheck software. Achieved and predicted 3-dimensional crown movements of maxillary and mandibular first molars, canines, and central incisors were then compared using the paired t test.
RESULTS
Relative to predicted changes, first molars achieved greater mesial displacement, mesial tipping, and buccal inclination in both the maxilla and mandible, greater intrusion in the maxilla, and greater mesial-lingual rotation and less constriction in the mandible. Canines achieved greater distal tipping in both the maxilla and mandible, less retraction in the maxilla, and greater lingual inclination and extrusion in the mandible. Central incisors achieved greater distal tipping and lingual inclination and extrusion in both the maxilla and mandible and less retraction in the maxilla.
CONCLUSIONS
Tooth crown movements were not fully achieved as predicted following Invisalign treatment. Differences focused on mesial tipping, buccal inclination, mesial displacement, and intrusion of the first molars, as well as distal tipping, lingual inclination, insufficient retraction, and intrusion of the canines and central incisors.
Topics: Adult; Bicuspid; Crowns; Humans; Incisor; Mandible; Maxilla; Orthodontic Appliances, Removable; Tooth Crown; Tooth Movement Techniques
PubMed: 34344557
DOI: 10.1016/j.ajodo.2020.06.041