RESUMEN
PURPOSE: The major struggle in peri-implantitis therapy is the availability of successful decontamination of the infected implant surface. The main hypothesis of this study was the Er,Cr: YSGG laser decontamination efficacy investigation on the infected implant surfaces with various peri-implantitis defects. The primary objective of this study was to decide the efficacy of Er,Cr:YSGG laser as a decontamination tool at various peri-implantitis simulating defects. The secondary objective was to compare the efficacy of the Er,Cr: YSGG laser on oral biofilm removal between two protocols the first protocol (4 cycles at 2.5 min) and the second protocol (5 cycles at 5 min) at various peri-implantitis simulating defects. MATERIALS AND METHODS: A total of 3 subjects whose plaque biofilms formed in-vivo on twenty-four tested implants were divided into four tested groups. Two native implants were tested as controls.The in vitro defect model was computer-aided designed and printed into a 3D-printed model with various anulations in peri-implant infrabony defects, which were 15,30,60,and 90 degrees. RESULTS: Both Er, Cr: YSGG decontamination protocols at 50 mJ (1.5 W/30 Hz), 50% air, and 40% water were effective at reducing the total implant surface area/ biofilm ratio (%), but the second protocol had a markedly greater reduction in the duration of application (5 cycles at 5 min) than did the first protocol (4 cycles at 2.5 min). CONCLUSION: The Er, Cr: YSGG laser is an effective decontamination device in various peri-implantitis defects. The second protocol(5 cycles at 5 min) with greater application time and circles is more effective than the first one. The defect angulation influence the decontamination capability in peri-implantitis therapy. CLINICAL RELEVANCE (SCIENTIFIC RATIONALE FOR STUDY): Clinicians anticipate that the exploration of suitable therapeutic modalities for peri-implantitis therapy is limited by the obvious heterogeneity of the available evidence in the literature and need for a pre-clinical theoretical basis setup. The major challenges associated with peri-implantitis therapy include the successful decontamination of the infected implant surface, the absence of any damage to the treated implant surface with adequate surface roughness, and the biocompatibility of the implant surface, which allows osteoblastic cells to grow on the treated surface and is the key for successful re-osseointegration. Therefore, these are the expected empirical triads that need to be respected for successful peri-implantitis therapy. Failure of one of the triads represents a peri-implantitis therapeutic failure. The Er, Cr: YSGG laser is regarded as one of the expected devices for achieving the required triad. TRIAL REGISTRATION: "Efficacy of Er,Cr YSGG Laser in Treatment of Peri-implantitis". CLINICALTRIALS: gov ID NCT05137821. First Posted date: 30 -11-2021.
Asunto(s)
Biopelículas , Implantes Dentales , Láseres de Estado Sólido , Periimplantitis , Humanos , Descontaminación/métodos , Implantes Dentales/microbiología , Placa Dental/microbiología , Placa Dental/terapia , Láseres de Estado Sólido/uso terapéutico , Periimplantitis/microbiología , Periimplantitis/terapia , Propiedades de SuperficieRESUMEN
BACKGROUND: Radiotherapy in head and neck cancer management causes degeneration of the salivary glands (SG). This study was designed to determine the potential of gingival mesenchymal stem cells (GMSCs) as a cell-based therapy to regenerate irradiated parotid SG tissues and restore their function using a murine model. METHODS: Cultured isolated cells from gingival tissues of 4 healthy guinea pigs at passage 3 were characterized as GMSCSs using flow cytometry for surface markers and multilineage differentiation capacity. Twenty-one Guinea pigs were equally divided into three groups: Group I/Test, received single local irradiation of 15 Gy to the head and neck field followed by intravenous injection of labeled GMSCs, Group II/Positive control, which received the same irradiation dose followed by injection of phosphate buffer solution (PBS), and Group III/Negative control, received (PBS) injection only. Body weight and salivary flow rate (SFR) were measured at baseline, 11 days, 8-, 13- and 16-weeks post-irradiation. At 16 weeks, parotid glands were harvested for assessment of gland weight and histological and immunohistochemical analysis. RESULTS: The injected GMSCs homed to degenerated glands, with subsequent restoration of the normal gland histological acinar and tubular structure associated with a significant increase in cell proliferation and reduction in apoptotic activity. Subsequently, a significant increase in body weight and SFR, as well as an increase in gland weight at 16 weeks in comparison with the irradiated non-treated group were observed. CONCLUSION: The study provided a new potential therapeutic strategy for the treatment of xerostomia by re-engineering radiated SG using GMSCs.
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Trasplante de Células Madre Mesenquimatosas , Células Madre Mesenquimatosas , Ratones , Animales , Cobayas , Modelos Animales de Enfermedad , Glándulas Salivales , Inyecciones Intravenosas , Peso CorporalRESUMEN
Introduction: Patients with end-stage renal disease (ESRD) suffer from mucocutaneous changes that could significantly impair the quality of life. We aimed this study to assess the mucocutaneous changes in hemodialysis patients and to correlate the serum creatinine to these changes. Methods: Data were collected from the Hemodialysis Center at Benha University. A cross-sectional study design on 130 chronic kidney disease (CKD) patients (30-60 years old, 84 males, 46 females) undergoing hemodialysis. Oral examinations were done for these patients as per the modified World Health Organization oral health survey 2013 criteria. All the mucocutaneous changes were recorded then types, distribution, and frequencies were calculated and correlated to serum creatinine. Results: Mucocutaneous abnormalities were present in 100% of the studied CKD sample. We observed that pallor (76.2%), xerostomia (70%), petechiae/purpura (49.2%), altered taste (49.2%), and lip pigmentation (40.8%) were the most prevalent mucocutaneous changes among the CKD patients undergoing hemodialysis. A strong association was detected between serum creatinine and the following: abnormal lip pigmentation and lichen planus. Discussion: There is an association between lip pigmentation and lichen planus in CKD patients and the level of serum creatinine as the higher level of serum creatinine was found in the patients with abnormal lip pigmentation and the atrophic lichen planus patients.
Asunto(s)
Fallo Renal Crónico , Liquen Plano , Insuficiencia Renal Crónica , Masculino , Femenino , Humanos , Adulto , Persona de Mediana Edad , Estudios Transversales , Creatinina , Calidad de Vida , Fallo Renal Crónico/complicaciones , Fallo Renal Crónico/terapia , Diálisis Renal/efectos adversos , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/terapiaRESUMEN
OBJECTIVE: The present study was conducted to evaluate the effect of soft tissue augmentation using a self-inflating soft tissue expander when performed before horizontal alveolar ridge augmentation on the outcomes of the bone augmentation procedure. The primary outcome is the bucco-palatal radiographical changes in alveolar ridge width, while the secondary outcome is the quality of the augmented bone assessed histomorphometrically. MATERIALS AND METHODS: Sixteen patients underwent horizontal alveolar ridge augmentation using autogenous bone. For the test group, soft tissue expanders were used in a separate surgery before bone grafting surgery. For the control group, patients received treatment including single surgery of bone grafting associated with periosteal releasing incision. Implants were placed in both groups 6 months after bone augmentation. Bucco-palatal changes in alveolar ridge width were evaluated via cone-beam computed tomography. Augmented bone quality was assessed histomorphometrically. RESULTS: After 6 months, regarding radiographic bone width, there was no statistically significant difference between the two groups, as mean bone width in group I and group II were 8.57 mm and 8.75 mm, respectively. Regarding histomorphometric analysis, Group I showed significantly higher mean bone surface area fraction, higher median mature collagen area fraction, and higher median blood vessel count than Group II (p-value = .012), (p-value = .004), and (p-value = .014), respectively. CONCLUSION: Within the limitations of the present study, soft tissue expander has no influence on bone width gain after horizontal alveolar ridge augmentation with an autogenous bone block but may have a positive effect on the quality of augmented bone.