Cochrane · intervention · CD012256

Final‐impression techniques and materials for making complete and removable partial dentures

Jayaraman, S, Singh, BP, Ramanathan, B, et al. · Cochrane Database of Systematic Reviews · 2018 · Cochrane Library

Oral Health Implants and prosthodontics2 versionsAMSTAR 2: not assessed

Full textEvery question was extracted from the full review (methods and results), not only its Summary of Findings table.

Questions

current version

GRADE rated

No studies

Included studies

as reported

No studies 8 · 25%Ungraded 6 · 18.8%Very low 15 · 46.9%Low 3 · 9.4%Moderate 0 · 0%High 0 · 0%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

Review question

Element	Planned (methods)	Found (results)
Population	Complete denture: completely edentulous people who have undergone complete denture treatment in both arches, regardless of age, sex and socioeconomic status; single complete denture participants if the outcome is reported for that arch only. Removable partial denture: partially edentulous people requiring rehabilitation with a permanent removable partial denture for one or both arches	435 participants randomised from eight complete denture trials (mean 54.3 per trial, range 10 to 122; male and female; edentulous in upper and lower arch; mean age 45 to 75 years; period of edentulousness 10 to 35 years) (n=435); partially edentulous people requiring a mandibular Kennedy Class-I removable partial denture (n=72)
Intervention	Complete dentures: same material with different techniques; same technique with different materials; different techniques with different materials. Techniques: single stage using one-step final impression; two-stage techniques using primary and final impression (single-step or two-step); different impression techniques for flabby ridge; different neutral zone techniques for resorbed ridge. Materials: alginate; zinc-oxide eugenol; elastomeric impression materials; impression plaster; green stick; fluid wax. Removable partial dentures: tooth-supported conditions (same material/different techniques; different materials/same technique); tooth-tissue-supported conditions (same material/different dual-impression techniques; different dual-impression techniques/different materials)	Biofunctional Prosthetic System / closed-mouth two stage-two step silicone (n=10); Selective pressure technique (n=69); Wax / fluid wax (n=27); Two stage-two step alginate wash impression (n=144); Single-stage alginate simplified impression (n=98); Altered-cast impression technique (n=72)
Comparison	Comparator technique or material within each planned comparison (same material with different techniques; same technique with different materials; different techniques with different materials)	Open-mouth two stage-two step conventional technique (n=10); Traditional and control mucostatic techniques (n=69); Polysulfide rubber (n=27); Silicone elastomer (n=144); Two stage-two step elastomer, silicone/polysulfide/polyether (n=98); Two stage-two step zinc-oxide eugenol (n=39); One-piece cast (n=72)
Outcomes	Primary: participant-reported oral health-related quality of life (OHIP/OHIP-EDENT/OHIP-14/20/49, GOHAI); participant-reported quality of the denture (retention, stability, comfort, chewing ability, satisfaction, denture dislodgement). Secondary (complete denture): number of border adjustments or sore spots up to one month after insertion; denture base retention/movement, stability and overextension up to one month; participant-reported preference; dislodgement during function. Secondary (removable partial denture): number of border and intaglio adjustments up to one month; number of years of service before a reline is required; abutment mobility, gingival health and denture base adaptation	Participant-reported oral health-related quality of life, OHIP-EDENT (n=144); Participant-reported quality of the denture / general satisfaction (n=144); Number of border adjustments and sore spots (n=27); Participant preference for dentures (n=69); Maxillary denture satisfaction (n=155); Mandibular denture satisfaction (n=155); Operator-assessed quality of the denture; Intaglio adjustments (n=72); Gingival health of abutments (n=57); Abutment mobility (n=57); Denture base adaptation (n=72)
Study designs	Randomised controlled trials (RCTs) and cross-over trials, in any language	Randomised controlled trials, including cross-over trials (four parallel-group, three two-arm cross-over and one three-arm cross-over for complete dentures; one parallel-group for removable partial dentures) (n=9)
Timing	Up to one month after insertion of denture for several secondary outcomes; number of years of service before reline (removable partial denture)	Follow-up ranged from 24 hours to one year (24 hours, one week, two weeks, one month, three months, six months, one year)

Search date: 2017-11. Databases: Cochrane Oral Health's Trials Register; Cochrane Central Register of Controlled Trials (CENTRAL); MEDLINE Ovid; Embase Ovid; US National Institutes of Health Trials Registry (ClinicalTrials.gov); World Health Organization International Clinical Trials Registry Platform