Identifying beneficial oral bacteria and understanding how they inhibit pathogens might help to unravel the mechanisms behind dysbiotic oral diseases. In this context, this study points towards an important role for hydrogen peroxide. The latter might lead in the future to novel preventive strategies for oral health based on improving the antimicrobial properties of commensal oral bacteria.
Oral rehabilitation aims to restore the aesthetic and function of the stomatognathic and phonetic systems, providing quality of life for the patients. To reach this objective, dental implants have been applied with high rates of success (Moraschini, Velloso, Luz, & Porto-Barboza, 2015; Nicoli et al., 2017). Nevertheless, placing implants in the correct position by freehand conventional techniques is chal
The aim of this study was to evaluate the density and the morphological aspects of biofilms adhered to different materials applied in oral rehabilitation supported by dental implants. Sixty samples were divided into four groups: feldspar-based porcelain, CoCr alloy, commercially pure titanium grade IV and yttria-stabilized zirconia. Human saliva was diluted into BHI supplemented with sucrose to grow biofilms for 24 or 48 h. After this period, biofilm was removed by 1% protease treatment and then analyzed by spectrophotometry (absorbance), colony forming unit method (CFU.cm-2) and field-emission guns scanning electron microscopy (FEG-SEM). The highest values of absorbance and CFU.cm-2 were recorded on biofilms grown on CoCr alloys when compared to the other test materials for 24 or 48 h. Also, FEG-SEM images showed a high biofilm density on CoCr. There were no significant differences in absorbance and CFU.cm-2 between biofilms grown on zirconia, porcelain and titanium (p<0.05). Microbiological assays associated with microscopic analyses detected a higher accumulation of oral biofilms on CoCr-based materials than that on titanium or zirconia that are used for prosthetic structures.
ObjectiveThe aim of this study was to evaluate the relationship between the number of
pillar implants of implant-supported fixed prostheses and the prevalence of
periimplant disease.Material and MethodsClinical and radiographic data were obtained for the evaluation. The sample
consisted of 32 patients with implant-supported fixed prostheses in function for
at least one year. A total of 161 implants were evaluated. Two groups were formed
according to the number of implants: G1) ≤5 implants and G2) >5 implants. Data
collection included modified plaque index (MPi), bleeding on probing (BOP),
probing depth (PD), width of keratinized mucosa (KM) and radiographic bone loss
(BL). Clinical and radiographic data were grouped for each implant in order to
conduct the diagnosis of mucositis or peri-implantitis.ResultsClinical parameters were compared between groups using Student's t test for
numeric variables (KM, PD and BL) and Mann-Whitney test for categorical variables
(MPi and BOP). KM and BL showed statistically significant differences between both
groups (p<0.001). Implants from G1 – 19 (20.43%) – compared with G2 – 26
(38.24%) – showed statistically significant differences regarding the prevalence
of peri-implantitis (p=0.0210).ConclusionIt seems that more than 5 implants in total fixed rehabilitations increase bone
loss and consequently the prevalence of implants with periimplantitis.
Notwithstanding, the number of implants does not have any influence on the
prevalence of mucositis.
The flapless technique with "palatal approach," Morse taper implants, and immediate implant placement all have favorable influence on the bone formation around the implants.
Introduction. This paper describes case reports where coronal growth of soft tissue on implant threads was observed after surgery for soft tissue graft. This phenomenon is known as “creeping attachment.” Methods. Two patients were submitted to gingival graft procedure including subepithelial connective tissue graft and masticatory mucosal graft. A two-year follow-up appointment was performed. Results. After a two-year follow-up gingival growth over titanium surfaces characterizing the “creeping attachment” phenomenon was observed. This gingival growth happened over abutment and threads surfaces. Conclusion. The creeping attachment phenomenon is possible over titanium surfaces and has not yet been reported in the relevant literature over this kind of structure.
Esthetic crown lengthening might be a possible alternative to correct or minimize gingival smile or slight discrepancies in esthetic gingival margin. Traditionally, this procedure is performed using lap elevation and subsequent osteotomy/osteoplasty. However, in very speciic cases, such procedure can be performed through the gingival sulcus with micro-chisels and without the need for lap elevation. his article demonstrates, indicates and discusses, based on a case report, the possibility of correction of gingival smile by means of the lapless osteotomy technique.
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