Najla Chebib - Academia.edu (original) (raw)
Papers by Najla Chebib
![Research paper thumbnail of [Pneumonia of the elderly and its link to oral health]](https://attachments.academia-assets.com/117516547/thumbnails/1.jpg)
](PubMed, Nov 7, 2018
Pneumonia is a frequent and serious disease among the elderly, often associated with functional a... more Pneumonia is a frequent and serious disease among the elderly, often associated with functional and cognitive impairments, dysphagia, malnutrition and immunosenescence. Although the link between the oral hygiene and the risk of pneumonia has been established, the oral status and swallowing function are not routinely screened in the context of a geriatric assessment. Bacteria from oral plaque are regularly aspirated into the lungs and periodontitis induces a chronic inflammation favoring the oral and respiratory epithelial colonization with respiratory pathogens, hence facilitating infections. The poor oral health status and related masticatory impairment are often associated with malnutrition and dehydration. Patients are stranded in a vicious circle of respiratory infections and relapses. Prevention in form of oral health care and daily oral hygiene has proven to be effective.
Dentistry journal, Oct 17, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
La justesse des empreintes de maxillaires edentes effectuees avec les alginates (ALG), les poyvin... more La justesse des empreintes de maxillaires edentes effectuees avec les alginates (ALG), les poyvinyles siloxanes (PVS), les polyvinyles siloxanes modifies (PVSM) avec de l’oxyde de zinc eugenol (ZOE) et une camera intraorale (TRI) est comparee a l’empreinte controle (pâte thermoplastique et ZOE). Sur 12 patients 60 empreintes sont effectuees selon 5 techniques et ensuite scannees puis comparees a l’aide d’un logiciel. Les deviations sont reportees pour la surface entiere (ES) et pour des regions d’interet. Les empreintes testees etaient significativement differentes de la surface entiere du controle (p=.009), et des differences significatives de justesse ont ete trouvees en comparant ALG (1.21±0.35 mm) avec PVS (0.75±0.17 mm; P=.008), PVSM (0.75±0.19 mm; P=.012) et TRI (0.70±0.18 mm; P=.006). Les empreintes aux PVS, PVS modifie et le TRI avaient des deviations similaires et aboutissent a des resultats cliniquement acceptables. Par contre, les empreintes alginates ne devraient pas etr...
Journal of Adhesion Science and Technology, 2015
Abstract The purpose of this in vitro study was to evaluate and compare the effectiveness of diff... more Abstract The purpose of this in vitro study was to evaluate and compare the effectiveness of different surface cleaning methods on the shear bond strength (SBS) of zirconia ceramic surfaces. Seventy polished and cleaned zirconia disk specimens of 8 mm in diameter and 3.4 mm in thickness were immersed in fresh saliva. They were then pressed into a freshly mixed silicone disclosing medium. Six different cleaning methods were applied to the tested groups; they were airborne-particle abraded (AA), covered with a cleaning paste (Ivoclean®) (IV), etched with orthophosphoric acid (PA), immersed in alcohol (AL), rinsed with tap water only (WA), or cleaned with steam (SC). No surface cleaning was done after saliva immersion and silicone disclosing medium contamination to the control group (CC). The specimens were then bonded to an adhesive resin cement using polyethylene tubes. SBS was determined using a universal testing machine at a crosshead speed of 1 mm/min. The specimens were also examined with a scanning electron microscope and a stereomicroscope. Group AA yielded the highest SBS value (7.01 ± 1.4 MPa) among the groups, while Group WA had the lowest SBS value (3.03 ± 0.8 MPa). The SBS values of Group AA (7.01 ± 1.4 MPa) and IV (6.2 ± 1.7 MPa) were also significantly higher than those of the remaining four groups (p < 0.05). Within the limitations of this in vitro study, it was concluded that among the various cleaning methods tested, airborne-particle abrasion and Ivoclean® paste were effective in cleaning the zirconia surface.
Journal of Prosthodontics
PurposeTo evaluate the effect of operator age on the scan accuracy (trueness and precision) of in... more PurposeTo evaluate the effect of operator age on the scan accuracy (trueness and precision) of inexperienced operators when compared with experienced operators, and how training, intraoral scanner (IOS), and software version affect scan accuracy.Material and MethodsThirty‐four operators were sorted into groups: G1 (operators <25 years old, no experience), G2 (operators >40 years old, no experience), and G3 (experienced IOS operators). They conducted partial‐arch scans before and after a 4‐session training with two IOSs (Trios 3 and True Definition) and two software versions. These scans were compared with the reference scans obtained from conventional impressions and a laboratory scanner (IScan D103i) to evaluate trueness (mean root mean square values) and precision (standard deviation of root mean square values) with a software program (Geomagic Control X). Kruskal‐Wallis and post‐hoc Dunn's tests were used to evaluate the effect of age on the scan accuracy of inexperienc...
International Journal of Prosthodontics, Jul 1, 2021
To investigate the differences in accuracy (ie, trueness and precision) of five different optical... more To investigate the differences in accuracy (ie, trueness and precision) of five different optical impression systems. Materials and Methods: The accuracy of the following optical impression systems was tested: (1) CEREC Bluecam (BL); (2) CEREC Omnicam (OM); (3) PlanScan (PL); (4) True Definition Scanner (TD); and (5) Trios 3 (TR). A standard plastic study model represented a patient with a fully dentate maxilla. Three clinical situations were simulated: Patient 1 (P1): fully dentate; Patient 2 (P2): anterior partial edentulism (two missing incisors); and Patient 3 (P3): posterior partial edentulism (missing premolar and molar). The models were scanned with a reference scanner (IScan D104i), and the digitized models were used as reference for all comparisons. Then, optical impressions were made for the three clinical scenarios (n = 10 per group). Results: In situation P1, the TD group provided the highest trueness (median ± SD root mean square: 180.2 ± 46.3 μm). In situation P2, the highest trueness was found in the TD (97.9 ± 27.6 μm) and TR (105 ± 9.5 μm) groups, and in situation P3, TR had the highest trueness (P < .05; 76.2 ± 5.6 μm). TR provided the highest precision (P < .05) in all three clinical situations, with RMS values of 76.7 ± 26 μm for P1, 46.8 ± 14.1 μm for P2, and 39.7 ± 9.1 μm for P3. Conclusion: Two optical impression systems (TR and TD) were superior to the other tested systems in most of the measurements. However, none of the tested systems was clearly superior with respect to both trueness and precision.
Clinical Oral Implants Research, Apr 1, 2020
Objectives: This in-vitro study aimed to compare changes in retentive force due to cyclic dislodg... more Objectives: This in-vitro study aimed to compare changes in retentive force due to cyclic dislodging of three novel un-splinted attachments. Materials and Methods: Experimental models simulating a mandibular two-implant overdenture situation, with implants positioned with various interimplant discrepancies (0°, 20°, 40°, 60°) were fabricated. Three attachment systems were tested, "N": a straight or 15°-angulated stud; "L": a sole straight stud and "C": a straight or individually-angulated stud. All models underwent wet-testing and were subjected to 10000 insertion-removal cycles in a universal testing machine. The mean retentive forces were calculated for cycles 10, 100, 1000, 5000 and 10000. Multiple mixed-effects linear regression models were applied for statistical analyses (⍺<0.05). Results: "N" demonstrated an increasing retention until 1000 cycles, which subsequently diminished back to its initial retention at 10000 cycles, showing no significant loss during the entire experiment. Statistical models demonstrated no effect of implant angulation on retention, except for 60° after 10000 cycles (p<0.05). "L" showed an early peak at 100 cycles, and did not significantly lose retentive force before 5000 cycles. Angulations of 40° or higher were shown to lead to lower retentive forces (0° vs 40° cycle 5'000: p<0.05; 0° vs 60° cycle 100: p<0.05, cycle 1000: p<0.001). "C" showed stable retentive forces with no significant loss only at 10000 cycles (all angles: p<0.001) or 5000 cycles (0° vs 60°: p<0.05). Conclusions: All systems showed retentive forces promising successful clinical use in implantoverdentures, even in situations with extremely angulated implants. Specific abutments compensating interimplant angulation maintain retention longer in situations with high axe divergencies.
Journal of Oral Rehabilitation, Sep 12, 2021
The decline in oro-facial function is called 'Oral Frailty' for which the Japanese Society of Ger... more The decline in oro-facial function is called 'Oral Frailty' for which the Japanese Society of Gerodontology (JSG) created a conceptual diagram divided into four stages based on seven parameters: oral hygiene, oral dryness, occlusal force, tongue-lip motor function,
Journal of Oral Rehabilitation, Feb 2, 2023
BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficienc... more BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficiency and an often‐unconscious change for a less healthy, yet easy to chew diet. Timely screening of masticatory function may foster an early‐onset diagnosis and potential treatment. The aim of this study was to compare alternative diagnostic tools for masticatory function to a Jelly‐scan test.Materials and MethodsPatients aged 70 years and older who were hospitalised for rehabilitation were recruited for this study. A total of four different tests for masticatory function were administered. The Japanese Society of Gerodontology glucose extraction test (Jelly‐scan) was used as reference to compare a colour‐changing gum test (Gum1‐colour) as well as a mixing ability test with a visual (Gum2‐visual) and opto‐electronical (Gum2‐digital) analyses. Receiver operating characteristic (ROC) curves were used to establish the discriminative value, kappa‐values were used to estimate individual agreements and correlations were verified using Spearman's tests.ResultsSixty‐one patients (Men n = 23, Women n = 38) aged 82.4 ± 6.8 years participated in the experiments. The average number of natural teeth was 16.5 ± 10.5, 34.4% of the participants wore removable dentures. For all tests, the sum of sensitivity and specificity was >150%. All test correlated with Jelly‐scan (absolute Rho >0.5). With Jelly‐scan 51 participants (83.6%) were diagnosed with “masticatory hypofunction”. After reducing the cut‐off value of the test from 100 mg/dL to 65 mg/dL, only 33 participants (54%) fulfilled the diagnosis. This post‐hoc analysis increased the sensitivity of the Gum2‐tests and the agreement to kappa >0.5 for all three tests.ConclusionAll three tests can be considered useful screening alternatives. In its original version, Jelly‐scan may tend to over‐diagnose masticatory hypofunction, hence a novel cut‐off with better agreement between tests is suggested.
PubMed, Nov 9, 2020
The objective of this study was to explore the preferred dental services of older people for when... more The objective of this study was to explore the preferred dental services of older people for when they become dependent. It aimed to assess their preferred type of health care professional and location of dental service, and relate their preferences to their willingness to pay (WTP) and willingness to travel (WTT). Older people aged 65 years or older were invited to participate in a questionnaire-based discrete choice experiment (DCE), to measure preferences for dental examinations and treatment, defined by two attributes: type of professional and location of the activity. Hypothetical scenarios based attributes were displayed in a projected visual presentation and participants noted their personal preference using a response sheet. Data was analyzed using a random-effects logit model. Eighty-nine participants (mean age 73.7 ± 6.6 years) attended focus group sessions. Respondents preferred that the family dentist (β: 0.2596) or an auxiliary (β: 0.2098) undertake the examination and wanted to avoid a medical doctor (β: –0.469). The preferred location for dental examination was at a dental practice (β: 0.2204). Respondents preferred to avoid treatments at home (β: –0.3875); they had a significant preference for treatment at the dental office (β: 0.2255) or in a specialist setting (β: 0.1620, ns). However, the type of professional did not have a significant influence on overall preference. Participants with a low WTP preferred examination at home (β: 0.2151) and wanted to avoid the dental practice (β: –0.0235), whereas those with a high WTP preferred the dental office (β: 0.4535) rather than home (β: –0.3029). WTT did not have a significant influence on preference. The study showed that older people generally preferred receiving dental services in a dental practice or specialist setting, and would prefer not to be treated at home. Continuity of dental services provided by the family dentist should therefore be prioritized where possible and further studies should examine the role of domiciliary care at home.
The objective of this study was to explore the preferred dental services of older people for when... more The objective of this study was to explore the preferred dental services of older people for when they become dependent.. It aimed to assess their preferred type of health care professional and location of dental service and relate their preferences to their willingness to pay (WTP) and willingness to travel (WTT). Older people aged 65 years or older were invited to participate in a questionnaire-based discrete choice experiment (DCE), to measure preferences for dental examinations and treatment, defined by two attributes: type of professional and location of the activity. Hypothetical scenarios on selected attributes were displayed in a projected visual presentation and participants noted their personal preference using a response sheet. Data were analyzed using random-effects logit model. Eighty-nine participants (mean age 73.7±6.6 years) attended focus group sessions. Respondents preferred the family dentist (β: 0.2596) or an auxiliary (β: 0.2098) to undertake the examination and wanted to avoid the medical doctor (β:-0.469). Preferred location for dental examination was at a dental practice (β: 0.2204). Respondents preferred to avoid treatments at home (β:-0.3875); they had a significant preference for treatment at the dental office (β: 0.2255) or in a specialist setting (β: 0.1620). However, the type of professional did not have a significant influence on overall preference. Participants with a low WTP preferred examination at home (β: 0.2151) and wanted to avoid the dental practice (β:-0.0235), whereas those with a high WTP preferred the dental office (β: 0.4535) rather than home (β:-0.3029). WTT did not have a significant influence on preference. The study showed that older people generally preferred receiving dental services in a dental practice or specialist setting, and do rather not wish to be treated at home. Continuity of dental 3 services provided by the family dentist should therefore be prioritized where possible and further studies should examine the role of domiciliary care at home.
Journal of Prosthetic Dentistry, Sep 1, 2022
Journal of Clinical Medicine
Xerostomia and hyposalivation are highly prevalent conditions in old age, particularly among mult... more Xerostomia and hyposalivation are highly prevalent conditions in old age, particularly among multimorbid elders, and are often attributed to the use of multiple medications. These conditions negatively affect oral functions, such as chewing, swallowing, speech, and taste. Additionally, the lack of lubrication of the oral mucosa frequently leads to super-infections with candida. Denture retention and comfort may also be compromised. The risk of dental caries and erosion of natural teeth increases since saliva, which is essential for repairing initial lesions in tooth structures, is insufficient. The dry sensation in the mouth also impacts the emotional and social well-being of elderly individuals. Patients experiencing xerostomia often avoid certain foods that are uncomfortable or difficult to consume. However, some foods may alleviate the symptoms or even stimulate salivation. This review discusses the limited available evidence on nutritional advice for patients with xerostomia and...
Journal of Oral Rehabilitation
BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficienc... more BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficiency and an often‐unconscious change for a less healthy, yet easy to chew diet. Timely screening of masticatory function may foster an early‐onset diagnosis and potential treatment. The aim of this study was to compare alternative diagnostic tools for masticatory function to a Jelly‐scan test.Materials and MethodsPatients aged 70 years and older who were hospitalised for rehabilitation were recruited for this study. A total of four different tests for masticatory function were administered. The Japanese Society of Gerodontology glucose extraction test (Jelly‐scan) was used as reference to compare a colour‐changing gum test (Gum1‐colour) as well as a mixing ability test with a visual (Gum2‐visual) and opto‐electronical (Gum2‐digital) analyses. Receiver operating characteristic (ROC) curves were used to establish the discriminative value, kappa‐values were used to estimate individual agreemen...
The Journal of Prosthetic Dentistry
The Journal of Prosthetic Dentistry
Revue Médicale Suisse, 2018
Pneumonia is a frequent and serious disease among the elderly, often associated with functional a... more Pneumonia is a frequent and serious disease among the elderly, often associated with functional and cognitive impairments, dysphagia, malnutrition and immunosenescence. Although the link between the oral hygiene and the risk of pneumonia has been established, the oral status and swallowing function are not routinely screened in the context of a geriatric assessment. Bacteria from oral plaque are regularly aspirated into the lungs and periodontitis induces a chronic inflammation favoring the oral and respiratory epithelial colonization with respiratory pathogens, hence facilitating infections. The poor oral health status and related masticatory impairment are often associated with malnutrition and dehydration. Patients are stranded in a vicious circle of respiratory infections and relapses. Prevention in form of oral health care and daily oral hygiene has proven to be effective. CHEBIB, Najla, MULLER, Frauke, PRENDKI, Virginie. La pneumonie de la personne âgée et son lien avec l'...
The International Journal of Prosthodontics, 2021
To evaluate the effects of overnight storage conditions on the dimensional stability and retentio... more To evaluate the effects of overnight storage conditions on the dimensional stability and retention of prostheses, as well as participants' subjective perceptions of these interventions. Materials and Methods: Subjects with maxillary complete prostheses (CRPs) were randomly assigned to receive two interventions in a crossover design: storage of their CRPs overnight in a dry environment or in a wet environment with a cleansing tablet. The denture intaglio surface was scanned, and outcome measures were collected before each intervention (BLN), postintervention (PIS), and after immersion in water for 15 minutes (WOC) following each intervention. Dimensional changes were analyzed for the total surface, anterior flange, palate, and tuberosities. Retention force was measured using a dynamometer, and the participants' subjective assessments of comfort, fit, and retention of their CRPs were collected. After verifying normal distribution, paired t and Wilcoxon signed rank tests were used to check for statistical significance (α = .05). Results: Ten participants (mean age: 76.5 ± 5.9 years) were recruited. Between BLN and PIS, the dimensional changes after dry intervention were significantly less than the wet intervention for the total surface (P = .009), anterior flange (P = .028), and palate (P = .005). No difference was found between the effects of storage or washout interventions on objectively measured CRP retention. However, after WOC following dry storage, participants perceived a lower retention (P = .021), and after WOC following wet storage, participants perceived a more comfortable palate (P = .018). Conclusion: For dimensional stability, dry overnight storage of removable prostheses can be safely recommended when indicated. Immersion in water for 15 minutes does not seem to add advantages.
PubMed, Nov 7, 2018
Pneumonia is a frequent and serious disease among the elderly, often associated with functional a... more Pneumonia is a frequent and serious disease among the elderly, often associated with functional and cognitive impairments, dysphagia, malnutrition and immunosenescence. Although the link between the oral hygiene and the risk of pneumonia has been established, the oral status and swallowing function are not routinely screened in the context of a geriatric assessment. Bacteria from oral plaque are regularly aspirated into the lungs and periodontitis induces a chronic inflammation favoring the oral and respiratory epithelial colonization with respiratory pathogens, hence facilitating infections. The poor oral health status and related masticatory impairment are often associated with malnutrition and dehydration. Patients are stranded in a vicious circle of respiratory infections and relapses. Prevention in form of oral health care and daily oral hygiene has proven to be effective.
Dentistry journal, Oct 17, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
La justesse des empreintes de maxillaires edentes effectuees avec les alginates (ALG), les poyvin... more La justesse des empreintes de maxillaires edentes effectuees avec les alginates (ALG), les poyvinyles siloxanes (PVS), les polyvinyles siloxanes modifies (PVSM) avec de l’oxyde de zinc eugenol (ZOE) et une camera intraorale (TRI) est comparee a l’empreinte controle (pâte thermoplastique et ZOE). Sur 12 patients 60 empreintes sont effectuees selon 5 techniques et ensuite scannees puis comparees a l’aide d’un logiciel. Les deviations sont reportees pour la surface entiere (ES) et pour des regions d’interet. Les empreintes testees etaient significativement differentes de la surface entiere du controle (p=.009), et des differences significatives de justesse ont ete trouvees en comparant ALG (1.21±0.35 mm) avec PVS (0.75±0.17 mm; P=.008), PVSM (0.75±0.19 mm; P=.012) et TRI (0.70±0.18 mm; P=.006). Les empreintes aux PVS, PVS modifie et le TRI avaient des deviations similaires et aboutissent a des resultats cliniquement acceptables. Par contre, les empreintes alginates ne devraient pas etr...
Journal of Adhesion Science and Technology, 2015
Abstract The purpose of this in vitro study was to evaluate and compare the effectiveness of diff... more Abstract The purpose of this in vitro study was to evaluate and compare the effectiveness of different surface cleaning methods on the shear bond strength (SBS) of zirconia ceramic surfaces. Seventy polished and cleaned zirconia disk specimens of 8 mm in diameter and 3.4 mm in thickness were immersed in fresh saliva. They were then pressed into a freshly mixed silicone disclosing medium. Six different cleaning methods were applied to the tested groups; they were airborne-particle abraded (AA), covered with a cleaning paste (Ivoclean®) (IV), etched with orthophosphoric acid (PA), immersed in alcohol (AL), rinsed with tap water only (WA), or cleaned with steam (SC). No surface cleaning was done after saliva immersion and silicone disclosing medium contamination to the control group (CC). The specimens were then bonded to an adhesive resin cement using polyethylene tubes. SBS was determined using a universal testing machine at a crosshead speed of 1 mm/min. The specimens were also examined with a scanning electron microscope and a stereomicroscope. Group AA yielded the highest SBS value (7.01 ± 1.4 MPa) among the groups, while Group WA had the lowest SBS value (3.03 ± 0.8 MPa). The SBS values of Group AA (7.01 ± 1.4 MPa) and IV (6.2 ± 1.7 MPa) were also significantly higher than those of the remaining four groups (p < 0.05). Within the limitations of this in vitro study, it was concluded that among the various cleaning methods tested, airborne-particle abrasion and Ivoclean® paste were effective in cleaning the zirconia surface.
Journal of Prosthodontics
PurposeTo evaluate the effect of operator age on the scan accuracy (trueness and precision) of in... more PurposeTo evaluate the effect of operator age on the scan accuracy (trueness and precision) of inexperienced operators when compared with experienced operators, and how training, intraoral scanner (IOS), and software version affect scan accuracy.Material and MethodsThirty‐four operators were sorted into groups: G1 (operators <25 years old, no experience), G2 (operators >40 years old, no experience), and G3 (experienced IOS operators). They conducted partial‐arch scans before and after a 4‐session training with two IOSs (Trios 3 and True Definition) and two software versions. These scans were compared with the reference scans obtained from conventional impressions and a laboratory scanner (IScan D103i) to evaluate trueness (mean root mean square values) and precision (standard deviation of root mean square values) with a software program (Geomagic Control X). Kruskal‐Wallis and post‐hoc Dunn's tests were used to evaluate the effect of age on the scan accuracy of inexperienc...
International Journal of Prosthodontics, Jul 1, 2021
To investigate the differences in accuracy (ie, trueness and precision) of five different optical... more To investigate the differences in accuracy (ie, trueness and precision) of five different optical impression systems. Materials and Methods: The accuracy of the following optical impression systems was tested: (1) CEREC Bluecam (BL); (2) CEREC Omnicam (OM); (3) PlanScan (PL); (4) True Definition Scanner (TD); and (5) Trios 3 (TR). A standard plastic study model represented a patient with a fully dentate maxilla. Three clinical situations were simulated: Patient 1 (P1): fully dentate; Patient 2 (P2): anterior partial edentulism (two missing incisors); and Patient 3 (P3): posterior partial edentulism (missing premolar and molar). The models were scanned with a reference scanner (IScan D104i), and the digitized models were used as reference for all comparisons. Then, optical impressions were made for the three clinical scenarios (n = 10 per group). Results: In situation P1, the TD group provided the highest trueness (median ± SD root mean square: 180.2 ± 46.3 μm). In situation P2, the highest trueness was found in the TD (97.9 ± 27.6 μm) and TR (105 ± 9.5 μm) groups, and in situation P3, TR had the highest trueness (P < .05; 76.2 ± 5.6 μm). TR provided the highest precision (P < .05) in all three clinical situations, with RMS values of 76.7 ± 26 μm for P1, 46.8 ± 14.1 μm for P2, and 39.7 ± 9.1 μm for P3. Conclusion: Two optical impression systems (TR and TD) were superior to the other tested systems in most of the measurements. However, none of the tested systems was clearly superior with respect to both trueness and precision.
Clinical Oral Implants Research, Apr 1, 2020
Objectives: This in-vitro study aimed to compare changes in retentive force due to cyclic dislodg... more Objectives: This in-vitro study aimed to compare changes in retentive force due to cyclic dislodging of three novel un-splinted attachments. Materials and Methods: Experimental models simulating a mandibular two-implant overdenture situation, with implants positioned with various interimplant discrepancies (0°, 20°, 40°, 60°) were fabricated. Three attachment systems were tested, "N": a straight or 15°-angulated stud; "L": a sole straight stud and "C": a straight or individually-angulated stud. All models underwent wet-testing and were subjected to 10000 insertion-removal cycles in a universal testing machine. The mean retentive forces were calculated for cycles 10, 100, 1000, 5000 and 10000. Multiple mixed-effects linear regression models were applied for statistical analyses (⍺<0.05). Results: "N" demonstrated an increasing retention until 1000 cycles, which subsequently diminished back to its initial retention at 10000 cycles, showing no significant loss during the entire experiment. Statistical models demonstrated no effect of implant angulation on retention, except for 60° after 10000 cycles (p<0.05). "L" showed an early peak at 100 cycles, and did not significantly lose retentive force before 5000 cycles. Angulations of 40° or higher were shown to lead to lower retentive forces (0° vs 40° cycle 5'000: p<0.05; 0° vs 60° cycle 100: p<0.05, cycle 1000: p<0.001). "C" showed stable retentive forces with no significant loss only at 10000 cycles (all angles: p<0.001) or 5000 cycles (0° vs 60°: p<0.05). Conclusions: All systems showed retentive forces promising successful clinical use in implantoverdentures, even in situations with extremely angulated implants. Specific abutments compensating interimplant angulation maintain retention longer in situations with high axe divergencies.
Journal of Oral Rehabilitation, Sep 12, 2021
The decline in oro-facial function is called 'Oral Frailty' for which the Japanese Society of Ger... more The decline in oro-facial function is called 'Oral Frailty' for which the Japanese Society of Gerodontology (JSG) created a conceptual diagram divided into four stages based on seven parameters: oral hygiene, oral dryness, occlusal force, tongue-lip motor function,
Journal of Oral Rehabilitation, Feb 2, 2023
BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficienc... more BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficiency and an often‐unconscious change for a less healthy, yet easy to chew diet. Timely screening of masticatory function may foster an early‐onset diagnosis and potential treatment. The aim of this study was to compare alternative diagnostic tools for masticatory function to a Jelly‐scan test.Materials and MethodsPatients aged 70 years and older who were hospitalised for rehabilitation were recruited for this study. A total of four different tests for masticatory function were administered. The Japanese Society of Gerodontology glucose extraction test (Jelly‐scan) was used as reference to compare a colour‐changing gum test (Gum1‐colour) as well as a mixing ability test with a visual (Gum2‐visual) and opto‐electronical (Gum2‐digital) analyses. Receiver operating characteristic (ROC) curves were used to establish the discriminative value, kappa‐values were used to estimate individual agreements and correlations were verified using Spearman's tests.ResultsSixty‐one patients (Men n = 23, Women n = 38) aged 82.4 ± 6.8 years participated in the experiments. The average number of natural teeth was 16.5 ± 10.5, 34.4% of the participants wore removable dentures. For all tests, the sum of sensitivity and specificity was >150%. All test correlated with Jelly‐scan (absolute Rho >0.5). With Jelly‐scan 51 participants (83.6%) were diagnosed with “masticatory hypofunction”. After reducing the cut‐off value of the test from 100 mg/dL to 65 mg/dL, only 33 participants (54%) fulfilled the diagnosis. This post‐hoc analysis increased the sensitivity of the Gum2‐tests and the agreement to kappa >0.5 for all three tests.ConclusionAll three tests can be considered useful screening alternatives. In its original version, Jelly‐scan may tend to over‐diagnose masticatory hypofunction, hence a novel cut‐off with better agreement between tests is suggested.
PubMed, Nov 9, 2020
The objective of this study was to explore the preferred dental services of older people for when... more The objective of this study was to explore the preferred dental services of older people for when they become dependent. It aimed to assess their preferred type of health care professional and location of dental service, and relate their preferences to their willingness to pay (WTP) and willingness to travel (WTT). Older people aged 65 years or older were invited to participate in a questionnaire-based discrete choice experiment (DCE), to measure preferences for dental examinations and treatment, defined by two attributes: type of professional and location of the activity. Hypothetical scenarios based attributes were displayed in a projected visual presentation and participants noted their personal preference using a response sheet. Data was analyzed using a random-effects logit model. Eighty-nine participants (mean age 73.7 ± 6.6 years) attended focus group sessions. Respondents preferred that the family dentist (β: 0.2596) or an auxiliary (β: 0.2098) undertake the examination and wanted to avoid a medical doctor (β: –0.469). The preferred location for dental examination was at a dental practice (β: 0.2204). Respondents preferred to avoid treatments at home (β: –0.3875); they had a significant preference for treatment at the dental office (β: 0.2255) or in a specialist setting (β: 0.1620, ns). However, the type of professional did not have a significant influence on overall preference. Participants with a low WTP preferred examination at home (β: 0.2151) and wanted to avoid the dental practice (β: –0.0235), whereas those with a high WTP preferred the dental office (β: 0.4535) rather than home (β: –0.3029). WTT did not have a significant influence on preference. The study showed that older people generally preferred receiving dental services in a dental practice or specialist setting, and would prefer not to be treated at home. Continuity of dental services provided by the family dentist should therefore be prioritized where possible and further studies should examine the role of domiciliary care at home.
The objective of this study was to explore the preferred dental services of older people for when... more The objective of this study was to explore the preferred dental services of older people for when they become dependent.. It aimed to assess their preferred type of health care professional and location of dental service and relate their preferences to their willingness to pay (WTP) and willingness to travel (WTT). Older people aged 65 years or older were invited to participate in a questionnaire-based discrete choice experiment (DCE), to measure preferences for dental examinations and treatment, defined by two attributes: type of professional and location of the activity. Hypothetical scenarios on selected attributes were displayed in a projected visual presentation and participants noted their personal preference using a response sheet. Data were analyzed using random-effects logit model. Eighty-nine participants (mean age 73.7±6.6 years) attended focus group sessions. Respondents preferred the family dentist (β: 0.2596) or an auxiliary (β: 0.2098) to undertake the examination and wanted to avoid the medical doctor (β:-0.469). Preferred location for dental examination was at a dental practice (β: 0.2204). Respondents preferred to avoid treatments at home (β:-0.3875); they had a significant preference for treatment at the dental office (β: 0.2255) or in a specialist setting (β: 0.1620). However, the type of professional did not have a significant influence on overall preference. Participants with a low WTP preferred examination at home (β: 0.2151) and wanted to avoid the dental practice (β:-0.0235), whereas those with a high WTP preferred the dental office (β: 0.4535) rather than home (β:-0.3029). WTT did not have a significant influence on preference. The study showed that older people generally preferred receiving dental services in a dental practice or specialist setting, and do rather not wish to be treated at home. Continuity of dental 3 services provided by the family dentist should therefore be prioritized where possible and further studies should examine the role of domiciliary care at home.
Journal of Prosthetic Dentistry, Sep 1, 2022
Journal of Clinical Medicine
Xerostomia and hyposalivation are highly prevalent conditions in old age, particularly among mult... more Xerostomia and hyposalivation are highly prevalent conditions in old age, particularly among multimorbid elders, and are often attributed to the use of multiple medications. These conditions negatively affect oral functions, such as chewing, swallowing, speech, and taste. Additionally, the lack of lubrication of the oral mucosa frequently leads to super-infections with candida. Denture retention and comfort may also be compromised. The risk of dental caries and erosion of natural teeth increases since saliva, which is essential for repairing initial lesions in tooth structures, is insufficient. The dry sensation in the mouth also impacts the emotional and social well-being of elderly individuals. Patients experiencing xerostomia often avoid certain foods that are uncomfortable or difficult to consume. However, some foods may alleviate the symptoms or even stimulate salivation. This review discusses the limited available evidence on nutritional advice for patients with xerostomia and...
Journal of Oral Rehabilitation
BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficienc... more BackgroundMasticatory function declines with age or disease, implicating a poor chewing efficiency and an often‐unconscious change for a less healthy, yet easy to chew diet. Timely screening of masticatory function may foster an early‐onset diagnosis and potential treatment. The aim of this study was to compare alternative diagnostic tools for masticatory function to a Jelly‐scan test.Materials and MethodsPatients aged 70 years and older who were hospitalised for rehabilitation were recruited for this study. A total of four different tests for masticatory function were administered. The Japanese Society of Gerodontology glucose extraction test (Jelly‐scan) was used as reference to compare a colour‐changing gum test (Gum1‐colour) as well as a mixing ability test with a visual (Gum2‐visual) and opto‐electronical (Gum2‐digital) analyses. Receiver operating characteristic (ROC) curves were used to establish the discriminative value, kappa‐values were used to estimate individual agreemen...
The Journal of Prosthetic Dentistry
The Journal of Prosthetic Dentistry
Revue Médicale Suisse, 2018
Pneumonia is a frequent and serious disease among the elderly, often associated with functional a... more Pneumonia is a frequent and serious disease among the elderly, often associated with functional and cognitive impairments, dysphagia, malnutrition and immunosenescence. Although the link between the oral hygiene and the risk of pneumonia has been established, the oral status and swallowing function are not routinely screened in the context of a geriatric assessment. Bacteria from oral plaque are regularly aspirated into the lungs and periodontitis induces a chronic inflammation favoring the oral and respiratory epithelial colonization with respiratory pathogens, hence facilitating infections. The poor oral health status and related masticatory impairment are often associated with malnutrition and dehydration. Patients are stranded in a vicious circle of respiratory infections and relapses. Prevention in form of oral health care and daily oral hygiene has proven to be effective. CHEBIB, Najla, MULLER, Frauke, PRENDKI, Virginie. La pneumonie de la personne âgée et son lien avec l'...
The International Journal of Prosthodontics, 2021
To evaluate the effects of overnight storage conditions on the dimensional stability and retentio... more To evaluate the effects of overnight storage conditions on the dimensional stability and retention of prostheses, as well as participants' subjective perceptions of these interventions. Materials and Methods: Subjects with maxillary complete prostheses (CRPs) were randomly assigned to receive two interventions in a crossover design: storage of their CRPs overnight in a dry environment or in a wet environment with a cleansing tablet. The denture intaglio surface was scanned, and outcome measures were collected before each intervention (BLN), postintervention (PIS), and after immersion in water for 15 minutes (WOC) following each intervention. Dimensional changes were analyzed for the total surface, anterior flange, palate, and tuberosities. Retention force was measured using a dynamometer, and the participants' subjective assessments of comfort, fit, and retention of their CRPs were collected. After verifying normal distribution, paired t and Wilcoxon signed rank tests were used to check for statistical significance (α = .05). Results: Ten participants (mean age: 76.5 ± 5.9 years) were recruited. Between BLN and PIS, the dimensional changes after dry intervention were significantly less than the wet intervention for the total surface (P = .009), anterior flange (P = .028), and palate (P = .005). No difference was found between the effects of storage or washout interventions on objectively measured CRP retention. However, after WOC following dry storage, participants perceived a lower retention (P = .021), and after WOC following wet storage, participants perceived a more comfortable palate (P = .018). Conclusion: For dimensional stability, dry overnight storage of removable prostheses can be safely recommended when indicated. Immersion in water for 15 minutes does not seem to add advantages.