The physical properties of a polyacetal denture resin

Fitton, J.S.; Davies, E.R.; Howlett, JA; Pearson, G.J.

doi:10.1016/0267-6605(94)90135-x

Cited by 67 publications

(66 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, the null hypothesis that there would be no difference in the retentive force between resin clasps and cast CoCr alloy clasps was [20]. The results of the present study verify these findings, the greatest retentive force for POM clasps was found in the 1.5 mm thick clasps designed to engage the 0.50 mm undercut, the same was for PEKK and PEEK.…”

Section: Resultssupporting

confidence: 82%

“…The rotational path PRDP is a relatively uncomplicated method that eliminates the use of esthetically objectionable clasping in the anterior region of the mouth [3-4, 8, 10, 19, 24, 26, 28-30, 38, 50, 57, 66-67] linked by an oxygen molecule [20] (Fig. 2).…”

Section: Rotational Path Prdpsmentioning

confidence: 99%

“…Since the introduction of POMs, there has been a continued interest in its use for PRDP applications [1, 10,20,37,48,61]. Chu considered it a simple and effective means of improving PRDP aesthetics [10].…”

Section: Thermoplastic Resins and Prdpsmentioning

confidence: 99%

See 2 more Smart Citations

Retentive forces and fatigue resistance of thermoplastic resin clasps

et al. 2012

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 82%

Section: Rotational Path Prdpsmentioning

confidence: 99%

See 1 more Smart Citation

Retentive forces and fatigue resistance of thermoplastic resin clasps

et al. 2012

View full text Add to dashboard Cite

“…Fourteen cylindrical specimens (seven non -modified Acetal resin, and seven modified Acetal resin)10mm in length and 8 mm in diameter prepared as described by Fitton et al in (1995). This test was done by universal testing machine WP 300.20 KN (kilo newton) (Figure 8), The Specimens loaded by using a cross-head speed of 1.0 mm min -1 , the specimens subjected to the load slowly and steadily by turning the hand wheel.…”

Section: Compressive Strength Testmentioning

confidence: 99%

“…1 Continous research in polymer science has provided "Acetal resin" (Polyoxymethylene (POM)), which is made by the polymerization of formaldehyde and is a thermoplastic technopolymer with a monomer-free crystalline structure. 2 Acetal resin is a thermoplastic and injection moulded resin. It has been used as alternative denture base and denture clasp material since 1986.…”

Section: Introductionmentioning

confidence: 99%

The effect of addition of barium sulphate nanoparticles on some properties of Acetal resin

Ahmed

Hasan

2017

Zanco J Med Sci

View full text Add to dashboard Cite

. IntroductionPatient needs a removable denture for the purpose of functional, psychological or financial. Construction of an esthetic removable denture with minimal display of conventional metal clasp makes a challenge to the dentist. 1 Continous research in polymer science has provided "Acetal resin" (Polyoxymethylene (POM)), which is made by the polymerization of formaldehyde and is a thermoplastic technopolymer with a monomer-free crystalline structure.2 Acetal resin is a thermoplastic and injection moulded resin. It has been used as alternative denture base and denture clasp material since 1986. It was used as a clasp material due to superior aesthetics which made the clasp match the shade of the abutment tooth.3 It is very strong, resists wear and fatigue, in addition to flexiblity, which makes it the best material for pre-formed clasps of partial denture, unilateral partial denture, provisional bridges, implant abutments, occlusal splints and orthodontic appliances.4 Acetal resin and polymethyl methacrylate (PMMA) are radiolucent materials that cannot be seen using standard radiographic techniques. So in cases of accidental ingestion, aspiration traumatic impactions of the dental appliance, it is difficult to be detected and requires invasive procedures as advanced imaging techniques. Delay in localizing or removing the foreign body may be harmful to the life. 5 Much research has been carried out to incorporate radio-opaque material such as metals, iodobenzene, polybarium acrylate and barium sulphate into the acrylic resin to fabricate a reasonable radio-opaque denture base material. 6 The effect of radiopaque material with the BaSO 4 was tested on the mechanical and physical properties of Background and objective: Acetal resin or polyoxymethylene is a flexible thermoplastic radiolucent denture base material. This study aimed to evaluate the addition of barium sulfate BaSO 4 nanoparticles on the mechanical and physical properties of acetal resin. Methods: Forty two specimens were prepared from both non-modified and modified acetal resin. The tested specimens were obtained by melt extrusion into the mold equipment followed by injection molding. The radio-opacity of non-modified and modified evaluated, and then some mechanical and physical properties tested. Results:The results of radio-opacity test showed that the radiographic density of BaSO 4 3% Acetal resin specimens was at the same level of 2mm thickness of the aluminum stepwedge. Non-significant decrease noted in surface roughness, creep in all strain regions, and compressive strength and modulus of elasticity. Conclusion: It has been concluded that the addition of 3% BaSO 4 nanoparticles produced an acceptable radio-opaque Acetal resin denture base material. Although the addition caused some changes in properties, the modified Acetal resin remained as a flexible thermoplastic material.

show abstract

Architecture of colloidal crystals constructed by silica hybrid nanoparticles

Ishizu

Tokuno

Lee

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Silica (SiO 2 )-crosslinked polystyrene (PS) particles possessing photofunctional N,N-diethyldithiocarbamate (DC) groups on their surface were prepared by the free-radical emulsion copolymerization of a mixture of SiO 2 (diameter D n ¼ 192 nm), styrene, divinyl benzene, 4-vinylbenzyl N,N-diethyldithiocarbamate (VBDC), and 2-hydroxyethyl methacrylate with a radical initiator under UV irradiation. In this copolymerization, the inimer VBDC had the formation of a hyperbranched structure by a living radical mechanism. These particles had DC groups on their surface. Subsequently, poly(methyl methacrylate) brushes encapsulated SiO 2 particles were synthesized by the grafting from a photoinduced atom transfer radical polymerization (ATRP) approach of methyl methacrylate initiated by SiO 2 -crosslinked PS particles as a macroinitiator. We constructed the colloidal crystals using these photofunctional particles. Moreover, the SiO 2 particle array of colloidal crystals was locked by radical photopolymerization with vinyl monomer as a matrix.

show abstract

The physical properties of a polyacetal denture resin

Cited by 67 publications

References 6 publications

Retentive forces and fatigue resistance of thermoplastic resin clasps

Retentive forces and fatigue resistance of thermoplastic resin clasps

The effect of addition of barium sulphate nanoparticles on some properties of Acetal resin

Architecture of colloidal crystals constructed by silica hybrid nanoparticles

Contact Info

Product

Resources

About