Comparative study of molar and incisor bite forces regarding deciduous, mixed, and definitive dentition

Manns, Arturo; Rojas, Víctor; Diest, Nicolás Van; Rojas, Daniela; Sampaio, Camila S.

doi:10.1080/08869634.2020.1732569

Cited by 7 publications

(7 citation statements)

References 28 publications

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“…44 Although the effect was not statistically significant, all the failures occurred in molars, that are subject to the highest occlusal loads. 45 Nevertheless, the number of failures was low (n=6) (Table 1), and thus, glass-ceramic partial coverage restorations in the molar region seem to be a reliable treatment method. Interestingly, the range of failure times suggested that the failures occurred after a random event rather than related to cumulative fatigue damage.…”

Section: Discussionmentioning

confidence: 97%

10.9-year survival of pressed acid etched monolithic e.max lithium disilicate glass-ceramic partial coverage restorations: Performance and outcomes as a function of tooth position, age, sex, and the type of partial coverage restoration (inlay or onlay)

Malament¹,

Margvelashvili‐Malament²,

Natto³

et al. 2021

The Journal of Prosthetic Dentistry

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Statement of problem. Long-term clinical data on the survival of pressed lithium disilicate glass-ceramic when used with partial coverage restorations and the effect that different technical and clinical variables have on survival are sparse.Purpose. The purpose of this clinical study was to determine the 10.9-year survival of pressed lithium disilicate glass-ceramic partial coverage restorations and associated clinical parameters on outcomes.Material and Methods. Individuals requiring single unit defect-specific partial coverage restorations in any area of the mouth were recruited in a clinical private practice. Participants were offered the options of partial coverage cast gold or glass-ceramic (lithium disilicate) restorations. Only participants that chose glass-ceramic partial coverage restorations were included in the study. The overall survival of the glass-ceramic restorations was assessed by the clinical factors (participant's age, sex, dental arch, tooth position in dental arch, type of partial coverage restoration, and ceramic thickness) determined at recall. The effect of this clinical parameters was evaluated by using Kaplan-Meier survival curves accounting for attrition bias and other reasons for failure. The statistical significance of differences between parameters was determined by using the log rank test (a=.05).Results. A total of 304 participants requiring 556 lithium disilicate restorations were evaluated. The mean age for the participant at the time of restoration placement was 62 with a range of 20 to 99 years, 120 were men and 184 were women. A total of 6 failures (bulk fracture or large chip) requiring replacement were recorded with the average time to failure of 2.4 (0.8-9.2) years. The total time at risk computed for these units was 1978.9 years providing an estimated failure risk of 0.3% per year. The 10-year estimated cumulative survival was 95.6%. The estimated cumulative survival of inlays (n=246) and onlays (n=305) were 93.9% and 98.3%, at 9.9 and 9.8 years, respectively (P<.05). Of the 6, there were 3 failures recorded for the partial coverage inlay restorations. The total time at risk for these inlays was 786.79 years providing an estimated risk of 0.38% per year. The other 3 failures recorded occurred for the partial coverage onlay restorations. The total time at risk for the onlays was 1032.17 years providing an estimated risk of 0.29% per year. The failures occurred in the molar region only. There were no failures recorded for the anterior partial coverage inlays (n=5). The total time at risk computed for the anterior units was 21.55 years providing an estimated risk of 0% per year. There was no statistically significant difference in the survival of partial coverage restorations among men and women, different age groups, or position in the dental arch. The thickness of the restoration had no influence on the survival of glass-ceramic partial coverage restorations.Conclusions. Pressed lithium disilicate defect-specific partial coverage restorations reported high survival rate o...

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Section: Discussionmentioning

confidence: 97%

10.9-year survival of pressed acid etched monolithic e.max lithium disilicate glass-ceramic partial coverage restorations: Performance and outcomes as a function of tooth position, age, sex, and the type of partial coverage restoration (inlay or onlay)

Malament¹,

Margvelashvili‐Malament²,

Natto³

et al. 2021

The Journal of Prosthetic Dentistry

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“… 39 Biting force results indicated that neither the SSW nor fabricated PEEK specimens reached the maximum force of the estimated occlusal force at the incisal region (250 N). 24 , 25 , 26 Serious mechanical deformation can occur when the force directly acts on the lingual fixed retainer. Patients should also be warned to be careful when biting with the anterior teeth.…”

Section: Discussionmentioning

confidence: 99%

“…2 ). The remaining models were then tested for resistance against vertical biting forces in the incisor region (225, 250, and 275 N) 25 , 26 , and two optimized designs from each cross-sectional shape were chosen based on Von Mises stress results and thickness considerations. Eventually, the six selected dimensions were fabricated into mechanical test specimens.…”

Section: Methodsmentioning

confidence: 99%

Assessment of mechanical characteristics of polyetheretherketone as orthodontic fixed lingual retainers

Win,

Chen,

Sainbayar

et al. 2023

Journal of Dental Sciences

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“…Some aspects of onlay design are associated with satisfactory clinical performance. The molar area bears the highest occlusal force; thus, restorations must be sufficiently strong to avoid fracture, and restoration thickness is closely related to fracture resistance [28,29]. Therefore, an onlay with a 1.5-2-mm-thick ceramic layer was designed to ensure flexural strength of the restoration.…”

Section: Discussionmentioning

confidence: 99%

Clinical performance of two onlay designs for molars after root canal treatment

Chen

Zhu

et al. 2023

J Oral Sci

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Purpose: To evaluate the clinical performance of two proposed onlay designs. Methods: Molars with occlusal and/or mesial/distal defects after root canal treatment were classified by design into three groups. Onlays without shoulders were the control group (Group C, n = 50). The designed onlays were Group O (n = 50) and the designed mesio-occlusal/disto-occlusal onlays were Group MO/DO (n = 80). All onlays had an occlusal thickness of approximately 1.5-2.0 mm, and the designed onlays had a shoulder depth and width of approximately 1 mm. In Groups C and O, the boxshaped retention was 1.5 mm in depth. The proximal box was connected with a dovetail retention in Group MO/DO. Patients were examined every 6 months and followed for 36 months. Restorations were evaluated by using the modified United States Public Health Service Criteria. Statistical analysis was performed by using Kaplan-Meier analysis, the chi-square test, and Fisher's exact test. Results: No tooth fracture, debonding, secondary caries, or gingivitis was observed in any group. Groups O and MO/DO had satisfactory survival and success rates, and there was no significant difference in performance characteristics among the three groups (P > 0.05). Conclusion:The two proposed onlay designs were effective in protecting molars.

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Comparative study of molar and incisor bite forces regarding deciduous, mixed, and definitive dentition

Cited by 7 publications

References 28 publications

10.9-year survival of pressed acid etched monolithic e.max lithium disilicate glass-ceramic partial coverage restorations: Performance and outcomes as a function of tooth position, age, sex, and the type of partial coverage restoration (inlay or onlay)

10.9-year survival of pressed acid etched monolithic e.max lithium disilicate glass-ceramic partial coverage restorations: Performance and outcomes as a function of tooth position, age, sex, and the type of partial coverage restoration (inlay or onlay)

Assessment of mechanical characteristics of polyetheretherketone as orthodontic fixed lingual retainers

Clinical performance of two onlay designs for molars after root canal treatment

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