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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.
581 questions in 23 reviews · Implants and prosthodontics
current versionsNo studies 87 · 15%Ungraded 388 · 66.8%Very low 88 · 15.1%Low 10 · 1.7%Moderate 8 · 1.4%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.
| Question | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Autogenous bone block from the chin vs 100% Bio-Oss + resorbable barrier Prosthesis/implant failure (1 year) · Patients with horizontally resorbed maxillary sites needing single implants · Up to 1 year post-loading Interventions for replacing missing teeth: horizontal and vertical bone augmentation techniques for dental… (2009) · Cochrane | OR 0.19 [0.01, 4.07] | 1 study · 62 participants | Ungraded |
Silicone surfactant cleanser vs Placebo / sham solution Visual plaque score · Complete denture (CD) wearers · 2 days Interventions for cleaning dentures in adults (2009) · Cochrane | MD -1.02 [-1.13, -0.91] | 1 study | Ungraded |
Brushing vs Association of brushing and effervescent tablets Fusobacteria (colony forming units, log-transformed) · Maxillary complete denture (CD) wearers Interventions for cleaning dentures in adults (2009) · Cochrane | MD 2.86 [2.25, 3.47] | 1 study · 18 participants | Ungraded |
Buccal onlay iliac grafts fixed with titanium screws vs Buccal onlay iliac grafts fixed with resorbable screws (split-mouth) Implant/prosthesis failure and complications · Patients with resorbed maxillae (incl. atrophic sinuses) needing implants · 2 years post-loading Interventions for replacing missing teeth: horizontal and vertical bone augmentation techniques for dental… (2009) · Cochrane | No statistically significant difference for any outcome; data not shown (Raghoebar 2006) | 1 study · 8 participants | Ungraded |
Ultrasonic treatment or microwave disinfection device vs Another method, sham/placebo, or no treatment Outcome NR · Adults (over 18) wearing complete dentures (CD) or removable partial dentures (RPD) Interventions for cleaning dentures in adults (2009) · Cochrane | The effectiveness of ultrasonic or microwave devices as an intervention for routine use was not studied according to a randomised controlled trial design (Implications for research). | 0 studies | No studies |
Vertical distraction osteogenesis vs Vertical GBR with non-resorbable barriers + particulate autogenous bone Complication at augmentation + donor site · Patients with vertically deficient posterior/anterior mandibular ridges needing implants · Up to 3 years post-loading Interventions for replacing missing teeth: horizontal and vertical bone augmentation techniques for dental… (2009) · Cochrane | OR 0.3 [0.04, 2.11] | 1 study · 21 participants | Ungraded |
Brushing vs Association of brushing and effervescent tablets Total anaerobes (colony forming units, log-transformed) · Maxillary complete denture (CD) wearers Interventions for cleaning dentures in adults (2009) · Cochrane | MD 5.64 [4.86, 6.42] | 1 study · 18 participants | Ungraded |
Lingualised teeth (maxillary anatomic + mandibular non-anatomic; lingualised occlusion scheme) vs Zero-degree teeth (non-anatomic, cuspless) Number of denture adjustments required · Edentulous adult patients requiring complete dentures · 3 weeks per denture set (cross-over) Interventions for replacing missing teeth: denture chewing surface designs in edentulous people (2005) · Cochrane | No statistically significant difference was found between the two occlusal patterns with regard to the number of adjustments required. | 1 study · 30 participants | Ungraded |
Lingualised teeth (maxillary anatomic + mandibular non-anatomic; lingualised occlusion scheme) vs Zero-degree teeth (non-anatomic, cuspless) Patient perceived comfort · Edentulous adult patients requiring complete dentures Interventions for replacing missing teeth: denture chewing surface designs in edentulous people (2005) · Cochrane | no estimate extracted | NR | No studies |
Lingualised teeth (maxillary anatomic + mandibular non-anatomic; lingualised occlusion scheme) vs Zero-degree teeth (non-anatomic, cuspless) Patient perceived masticatory/chewing efficiency · Edentulous adult patients requiring complete dentures Interventions for replacing missing teeth: denture chewing surface designs in edentulous people (2005) · Cochrane | no estimate extracted | NR | No studies |
Lingualised teeth (maxillary anatomic + mandibular non-anatomic; lingualised occlusion scheme) vs Zero-degree teeth (non-anatomic, cuspless) Patient perceived satisfaction (denture preference) · Edentulous adult patients requiring complete dentures · 3 weeks per denture set (cross-over) Interventions for replacing missing teeth: denture chewing surface designs in edentulous people (2005) · Cochrane | OR 10 [2.04, 48.96] | 1 study · 30 participants | Ungraded |
Lingualised teeth (maxillary anatomic + mandibular non-anatomic; lingualised occlusion scheme) vs Zero-degree teeth (non-anatomic, cuspless) Patient perceived masticatory/chewing function · Edentulous adult patients requiring complete dentures Interventions for replacing missing teeth: denture chewing surface designs in edentulous people (2005) · Cochrane | no estimate extracted | NR | No studies |
Direct resin composite veneer vs Indirect resin composite veneer Adverse reactions · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Planned outcome; no adverse-reaction data were reported by the included trial. | 0 studies | No studies |
Direct resin composite veneer vs Indirect resin composite veneer Pain following treatment · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Planned outcome; pain following treatment was not reported by the included trial (earlier trial publications reported treatment times, not pain). | 0 studies | No studies |
Direct resin composite veneer vs Indirect resin composite veneer Restoration failure (longevity) · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations · 2 years Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Meijering 1998 (data by restoration, not pooled; no statistical analysis possible). Failures over 2-year follow-up: direct resin composite (n=69) 4 absolute and 14 relative failures; indirect resin composite (n=54) 7… | 1 study · 123 participants | Ungraded |
Indirect veneer with no incisal edge reduction vs Indirect veneer with incisal edge reduction (1.5 mm plus short palatal bevel) Restoration survival (longevity) · Patients receiving indirect laminate veneer restorations on permanent anterior teeth · 2 years Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Meijering 1998 (Table 3): survival percentages by preparation type at 2 years (original/functional/overall) - no incisal edge reduction 98/97/95; incisal reduction 95/90/87. No statistical comparison performed. | 1 study | Ungraded |
Direct resin composite veneer vs Indirect resin composite veneer Cost of treatment · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Planned outcome; cost of treatment was not reported by the included trial. | 0 studies | No studies |
Direct resin composite veneer vs Indirect resin composite veneer Patient satisfaction · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations · 2 years Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Meijering 1998 (Table 4): patients satisfied at 2 years - direct resin composite 67%, indirect resin composite 82%. No statistical comparison performed. | 1 study | Ungraded |
Direct resin composite veneer vs Porcelain (indirect) veneer Patient satisfaction · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations · 2 years Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Meijering 1998 (Table 4): patients satisfied at 2 years - direct resin composite 67%, porcelain 93%. No statistical comparison performed. | 1 study | Ungraded |
Direct resin composite veneer vs Porcelain (indirect) veneer Restoration failure (longevity) · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations · 2 years Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Meijering 1998 (data by restoration, not pooled; no statistical analysis possible). Failures over 2-year follow-up: direct resin composite (n=69) 4 absolute and 14 relative failures; porcelain (n=56) 0 absolute and 3… | 1 study · 125 participants | Ungraded |
Direct resin composite veneer vs Indirect resin composite veneer Colour match (aesthetic achievement) · Patients with permanent anterior teeth with intrinsic staining suitable for laminate veneer restorations Direct versus indirect veneer restorations for intrinsic dental stains (2004) · Cochrane | Planned outcome; colour match was not reported by the single included trial (Meijering 1998). | 0 studies | No studies |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Dissatisfied with eating with denture · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 5.36 [0.67, 43.07] | 1 study · 58 participants | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Dissatisfied with appearance of denture · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 1.43 [0.35, 5.83] | 1 study · 58 participants | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Overall denture satisfaction (0-10 scale) · Edentulous patients requiring improved denture retention · 5 years Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | MD -0.90 [-1.74, -0.06] | 1 study | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Overall denture satisfaction (binary) · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 16.03 [0.96, 268.36] | 1 study · 58 participants | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Cost-effectiveness · Edentulous patients requiring improved denture retention Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | Cost-effectiveness (outcome 1.9): The cost-effectiveness data could not be extracted from the report as it was combined with a separate trial. | 1 study | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Dissatisfied with speech with denture · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 7.5 [0.98, 57.16] | 1 study · 58 participants | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Morbidity: altered sensation of the lower lip and chin · Edentulous patients requiring improved denture retention · 1 year; 5 years Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | Morbidity: altered lower lip and chin sensation, measured at 1 year and 5 years (Risk Ratio, M-H Fixed; totals not selected). There was no statistically significant difference at either time point and no patients had… | 1 study | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Overall denture satisfaction (0-10 scale) · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | MD -0.66 [-1.28, -0.04] | 1 study | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Dissatisfied with lower denture · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 3.75 [0.85, 16.55] | 1 study · 58 participants | Ungraded |
Preprosthetic surgery for a conventional denture (PPS) vs Implant retained overdenture (dental implants) (IRO) Dissatisfied with retention of denture · Edentulous patients requiring improved denture retention · 1 year Interventions for replacing missing teeth: preprosthetic surgery versus dental implants (2002) · Cochrane | RR 2.41 [0.84, 6.95] | 1 study · 58 participants | Ungraded |