Evaluation of wear behaviour of various occlusal splint materials and manufacturing processes

Grymak, Anastasiia; Waddell, John Neil; Aarts, John M.; Ma, Sunyoung; Choi, Joanne Jung Eun

doi:10.1016/j.jmbbm.2021.105053

Cited by 26 publications

(18 citation statements)

References 39 publications

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“…Due to the variation in wear test parameters such as wetting medium, indenter material and design, number of chewing cycles, applied movements/rotations, and assessment techniques, an absolute comparison of results between published studies was not applicable. Grymak et al 39) found that 3D-printed splint materials exhibited lower wear resistance than the heat-cured and CAD-CAM milled PMMA materials. In contrast, in the study by Wesemann et al 31) , conventional, milled, and additively manufactured occlusal splints displayed similar wear resistance after 200,000 loading cycles at 20 N and 50 N, respectively.…”

Section: Discussionmentioning

confidence: 99%

Two-body wear and surface hardness of occlusal splint materials

et al. 2022

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The aim of this in vitro study was to evaluate the wear and surface hardness of nine materials for conventional manufacturing, subtractive milling, and 3D printing of occlusal splints, as well as to evaluate the differences in wear and surface hardness between rigid and flexible 3D-printed occlusal splint materials. Two-body wear and Vickers hardness tests were performed. The vertical wear depth and Vickers hardness values were statistically analyzed. Vertical wear depth and surface hardness values were statistically significant among the investigated materials (p<0.05). The lowest vertical wear depth was observed for the heat-cured resin (27.5±2.4 μm), PMMA-based milled material (30.5±2.8 μm), and autopolymerizing resin (36.7±6.3 μm), with no statistical difference (p<0.05). Flexible 3D-printed and CAD-CAM milled polycarbonate-based splint materials displayed lower surface hardness and higher wear than the PMMA-based materials. PMMA-based splint materials displayed the most consistent surface hardness and wear resistance regardless of the manufacturing technology.

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Section: Discussionmentioning

confidence: 99%

Two-body wear and surface hardness of occlusal splint materials

et al. 2022

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“…Traditional occlusal splints are handmade and may have errors during model casting and resin curing. Full digital work flow increases the accuracy of manufacturing, improves the comfort of the patients and reduces the clinical splint adjusting time 14–16 . Besides, KDOS also applies a special masticatory deprogramming process to obtain a stable therapeutic jaw position, which by traditional methods includes chin point guidance, bimanual manipulation and leaf gauges, etc.…”

Section: Discussionmentioning

confidence: 99%

“…Full digital work flow increases the accuracy of manufacturing, improves the comfort of the patients and reduces the clinical splint adjusting time. [14][15][16] Besides, KDOS also applies a special masticatory deprogramming process to obtain a stable therapeutic jaw position, which by traditional methods includes chin point guidance, bimanual manipulation and leaf gauges, etc. Besides, traditional methods of obtaining stable therapeutic jaw position are more dependent on the clinician's experience, 17 found that the incidence of deep overjet and deep overbite (>4 mm) were higher in TMD patients.…”

Section: Discussionmentioning

confidence: 99%

Preliminary evaluation of Kovacs digital occlusal splint in the treatment of temporomandibular disorders: A single‐centre, cross‐sectional study

Hua

Fan

Nie

et al. 2023

J of Oral Rehabilitation

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Background: Digital occlusal splint is a novel approach in the treatment of temporomandibular disorders (TMD) and there is a lack of evaluation.Objective: To introduce Kovacs digital occlusal splint (KDOS) and evaluate its clinical and magnetic resonance imaging (MRI) outcomes and influencing factors in the treatment of TMD.Patients and Methods: Patients diagnosed of TMD by MRI and treated with KDOS from June 2020 to December 2021 were retrospectively reviewed. They were divided into three groups: anterior disc displacement with reduction (ADDwR), anterior disc displacement without reduction (ADDwoR) and ADDwoR + osteoarthritis (ADDwoR + OA). Visual analogue scales (VAS) scores of pain, diet, mandibular function, quality of life (Qol) and maximum interincisal opening were compared before and at least 8 weeks after treatment. Binary logistic regression was used to analyse the influence of four factors including age, gender, Wilkes stage and the severity of symptoms on treatment. MRI was used to evaluate the condylar bone status and disc length after at least 3 months treatment.Results: One hundred and eighty-four patients were included in the study. The average age was 30.9 ± 14.2 years and the average follow-up was 19.8 ± 10.0 weeks. Pain, diet, mandibular function and Qol were all significantly improved after KDOS treatment (p < .05), with the effective rates of 71.6%, 56.4%, 55.3% and 54.1%. Binary logistic regression showed that higher probabilities of improvement were related to the patients with older age, ADD without OA and higher VAS scores before treatment. MRI showed that 94.1% of the condylar bone status remained stable or improved and the disc length was unchanged after treatment. Conclusion:KDOS is effective for the treatment of TMD. Older age, ADD without OA and higher VAS scores before treatment had better results.

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“…Further studies are needed to establish the optimal printing protocol and clinically acceptable manufacturing accuracy for fabricating AM occlusal devices. Print orientation has been reported to influence the manufacturing accuracy, 15,16,21,24 surface roughness, 20,22 fit, 17,23,26 mechanical properties, 18,25,[27][28][29][30][31][32][33][34][35] printing time, 21 and material consumption 21 of AM dental devices. While a print orientation may maximize the manufacturing accuracy of a dental device, the same print orientation may not maximize other properties of the same printed object.…”

Section: Rms Error (Mm)mentioning

confidence: 99%

“…6,7 Studies on the influence of print orientation on the manufacturing accuracy of casts, 15,20 interim dental restorations, 13,18,20,26 castable patterns, 17 complete dentures, 14,16 silicone indices, 19 and surgical guides are sparse. 12,21,27 Additionally, print orientation could also affect surface roughness, 20,22 fit, 17,23,26 mechanical properties, 18,25,[27][28][29][30][31][32][33][34][35] printing time, 21 and material consumption. 21 The authors are aware of only 1 previous study 23 that evaluated the influence of print orientation of the clinical fit of SLA AM occlusal devices, which reported no differences between the occlusal devices manufactured with different print orientations.…”

mentioning

confidence: 99%