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REPLACEMENT VERSUS REPAIR OF DEFECTIVE RESTORATIONS IN ADULTS: AMALGAM

Sharif Mohammad O, Merry Alison, Catleugh Melanie, Tickle Martin, Brunton Paul, Dunne Stephen M,

Aggarwal Vishal R

Sharif Mohammad O, Merry Alison, Catleugh Melanie, Tickle Martin, Brunton Paul, Dunne Stephen M, Aggarwal Vishal R

Cochrane Database of Systematic Reviews, Issue 11, 2013 (Status in this issue: NEW)

Copyright 2009 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

DOI: 10.1002/14651858.CD005970.pub2

This review should be cited as: Sharif Mohammad O, Merry Alison, Catleugh Melanie, Tickle Martin, Brunton Paul,

Dunne Stephen M, Aggarwal Vishal R. Replacement versus repair of defective restorations in adults: amalgam.

Cochrane Database of Systematic Reviews. In: The Cochrane Library, Issue 11, Art. No. CD005970. DOI:

10.1002/14651858.CD005970.pub2

A B S T R A C T

Background

Amalgam is a common filling material for posterior teeth, as with any restoration amalgams have a finite life-span.

Traditionally replacement was the ideal approach to treat defective amalgam restorations, however, repair offers an

alternative more conservative approach where restorations are only partially defective. Repairing a restoration has the

potential of taking less time and may sometimes be performed without the use of local anaesthesia hence it may be less

distressing for a patient when compared with replacement.

Objective

To evaluate the effectiveness of replacement (with amalgam) versus repair (with amalgam) in the management of

defective amalgam dental restorations in permanent molar and premolar teeth.

Criteria for considering studies for this review

For the identification of studies relevant to this review we searched the Cochrane Oral Health Group Trials Register (to

23rd September 2009); CENTRAL (The Cochrane Library 2009, Issue 4); MEDLINE (1950 to 23rd September 2009);

EMBASE (1980 to 23rd September 2009); ISI Web of Science (SCIE, SSCI) (1981 to 22nd December 2009); ISI Web of

Science Conference Proceedings (1990 to 22nd December 2009); BIOSIS (1985 to 22nd December 2009); and

OpenSIGLE (1980 to 2005). Researchers, experts and organisations known to be involved in this field were contacted in

order to trace unpublished or ongoing studies. There were no language limitations.

Selection criteria

Trials were selected if they met the following criteria: randomised or quasi-randomised controlled trial, involvingreplacement and repair of amalgam restorations.

Data collection and analysis

Two review authors independently assessed titles and abstracts for each article identified by the searches in order to

decide whether the article was likely to be relevant. Full papers were obtained for relevant articles and both review

authors studied these. The Cochrane Collaboration statistical guidelines were to be followed for data synthesis.

Main results

The search strategy retrieved 145 potentially eligible studies, after de-duplication and examination of the titles and

abstracts all but three studies were deemed irrelevant. After further analysis of the full texts of the three studies

identified, none of the retrieved studies met the inclusion criteria and all were excluded from this review.

Authors' conclusions

There are no published randomised controlled clinical trials relevant to this review question. There is therefore a needfor methodologically sound randomised controlled clinical trials that are reported according to the Consolidated

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Standards of Reporting Trials (CONSORT) statement (www.consort-statement.org/). Further research also needs to

explore qualitatively the views of patients on repairing versus replacement and investigate themes around pain, distress

and anxiety, time and costs.

P L A I N L A N G U A G E S U M M A R Y

The management of dental caries is a major part of clinical dentistry. Amalgam filling material is very commonly used

and when amalgam restorations (fillings) become defective two treatment options exist: 1) the amalgam restoration canbe replaced completely, or 2) the restoration can be repaired. Traditionally, replacement of defective amalgam

restorations was the only option recommended, however, repairing the restoration would offer a more conservative

approach in certain situations. Repairing restorations could save time and as certain repairs may be performed without

the use of local anaesthesia they can be less distressing for the patient when compared with replacement. The review

authors did not identify any randomised controlled trials suitable for inclusion that compared the effectiveness of

managing defective amalgam restorations by replacing them (with amalgam) versus repairing them (with amalgam) in

permanent molar and premolar teeth. Further randomised controlled trials should be conducted in a well designed

manner and reported according to the Consolidated Standards of Reporting Trials (CONSORT) statement. They should

also explore qualitatively the views of patients on repairing versus replacement of amalgam restorations and investigate

themes around pain, distress and anxiety, time and costs which are all relevant for effective patient care and

satisfaction.

B A C K G R O U N D

The treatment of dental caries is a major focus of clinical dentistry. Amalgam is a commonly used filling material but

amalgam restorations have a finite life-span. Replacement has traditionally been seen as the ideal approach to the

treatment of defective amalgam restorations and may be the only option where a defect is extensive. However, repair

offers an alternative more conservative approach where a restoration is only partially defective (Wilson 1999 ).

Replacement restorations make up a major part of the dental treatment provided in Europe and the USA (Burke 1999 ;

DPB 2003 ; Setcos 2004 ) and place a high financial burden on dental health services (Paterson 1995 ). The decisions

leading to the placement, replacement or repair of restorations are central to clinical dental practice but appear to be

based on local practice patterns and individual clinical experience rather than evidence of effectiveness (Burke 1999 ;

Deligeorgi 2000 ; Drake 1990 ; Elderton 1990 ).

Replacement involves the complete removal of old amalgam together with base or lining materials and carries a risk of

the inadvertent removal of sound tooth tissue. Repeated replacement is therefore associated with a progressive increase

in cavity size (Mjor 1998 ). In addition, each time dentine is cut during cavity preparation there is a risk of damage to

the dental pulp and the development of clinical symptoms (Wilson 1999 ). Although the commonest reason for the

replacement of a filling is the diagnosis of secondary caries (Burke 1999 ; Mjor 1992 ; Mjor 2000 ; Mjor 2002a ; Setcos

2004 ), the definition of this is ill-defined and lesions diagnosed as secondary caries may encompass both non-carious

defects and small areas of secondary caries which are amenable to repair (Mjor 2002b ). The belief that microleakage of

oral fluids into marginal or interfacial defects leads to secondary caries or pulpal pathology underpinned the traditional

support for replacement over repair. However, although microleakage may be observed under laboratory conditions, it

does not necessarily occur in the clinical situation (Wilson 1999 ).

In the repair of a defective amalgam restoration only the defective area is removed and replaced. Repair offers a

pragmatic approach and has a number of potential advantages - it is more conservative, quicker, cheaper, less

traumatic to the patient and the tooth, and local anaesthesia may not be required (Mjor 1993 ).

Funding systems may influence dentists' decisions about whether to replace or repair restorations (Burke 2002 ). For

example, 'fee for item of service' systems may favour replacement whereas capitation-based systems are more likely to

encourage repair. Dentists' decisions on whether to replace or repair may also be influenced by teaching which has

traditionally advocated replacement as the treatment of choice (Wilson 1999 ) and a lack of knowledge about repair

techniques (Cook 1981 ).

This review aims to evaluate the effectiveness of replacement (with amalgam) versus repair (with amalgam) for


O B J E C T I V E S

To evaluate the effectiveness of replacement (with amalgam) versus repair (with amalgam) in the management of


The following null hypothesis was tested:

There is no difference in the effectiveness of replacement (with amalgam) of defective amalgam dental restorations

compared to the repair (with amalgam) of defective amalgam dental restorations in permanent molar and premolar

teeth.


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M E T H O D S O F T H E R E V I E W

C R I T E R I A F O R C O N S I D E R I N G S T U D I E S F O R T H I S R E V I E W

Types of studies

Randomised controlled trials (RCTs) and quasi-randomised controlled trials including split-mouth studies.

Types of participants

Adults (16 years or over) with one or more defective amalgam restoration(s) in a molar or premolar tooth/teeth treated

by like for like replacement (i.e. replacement with amalgam) and/or like for like repair (i.e. repair with amalgam).

Participants in whom a tooth undergoes further restoration or an extraction for reasons not connected with the

repair/replacement restoration (e.g. extraction due to periodontal disease) were not included.

Types of intervention

Studies with the following interventions and controls were included:

Intervention: repair of a defective amalgam restoration in a permanent molar or premolar tooth with amalgam.

Control: replacement of a defective amalgam restoration in a permanent molar or premolar tooth with amalgam.

In the context of this systematic review, the terms 'repair' and 'replacement' are defined as follows. A repair to an

amalgam restoration is defined as the removal of only the defective part of a restoration and/or adjacent tooth tissue

and followed by the placement of a new 'partial' restoration. A replacement amalgam restoration is defined as the

removal of an entire restoration including any bases, liners, secondary caries and tooth tissue where appropriate,

followed by the placement of a new restoration.

This systematic review was not concerned with studies involving the refurbishment of amalgam restorations. In order to

ensure that there is clarity regarding the inclusion and exclusion criteria, refurbishment is defined for the purposes of

this review as the reshaping, refinishing or removal of overhangs in an existing restoration which does not require the

placement of additional restorative material.

In order to be included in this review, studies must have used clearly defined criteria for assessing whether restorations

were defective. Studies were expected to use the same criteria at baseline and follow-up stages. Although criteria for

standardising the diagnosis of defective restorations are not well defined or universally accepted, the US Public Health

Service (USPHS) criteria and modified Ryge criteria provide possible models for this (Ryge 1981 ).

Types of outcome measures

Primary outcomes

The main outcome of interest was success or failure of the replacement or repair restoration and associated tooth as

assessed by clinical examination. The primary outcome measures were therefore the clinical acceptability or

unacceptability of each restoration, defined by the USPHS criteria, Ryge criteria or modifications of these scales, and

assessed by clinical examination. It was anticipated that this would be recorded as success or failure of the restoration

and/or that further repair or replacement of the restoration was necessary. Other outcome measures indicating the

failure of a replacement or repaired amalgam restoration included the following occurring in relation to the

repaired/replaced amalgam: placement of an additional restoration e.g. crown or inlay; root filling; clinical symptoms

e.g. pain, swelling, diagnosis of pulpitis, abscess formation, and extraction of the tooth. Studies should have determined

success or failure according to the same criteria used in the decision to replace or repair the restoration.

Secondary outcomes

In addition to the main outcome measure, any outcomes reported perioperatively (e.g. pain/discomfort) and

postoperatively (i.e. within 48 hours; e.g. pain/discomfort) were to be recorded. Where any other outcomes were

presented e.g. related to patient experience or aesthetics these were also to be recorded.

Timing of outcome assessment

The decision on which outcome period to use for the review was to be based on the most commonly reported period(s)

of assessment amongst studies meeting the inclusion criteria. Outcome data from all periods of follow-up were to be

included, but where the period of follow-up differed between studies, this was to be categorised as medium-term (less

than 5 years) or long-term (5 years and above). Time-to-event (survival data) was to be collected and analysed where

available.

S E A R C H M E T H O D S F O R I D E N T I F I C A T I O N O F S T U D I E S


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Search methods for identification of studies

For the identification of studies included or considered for this review, detailed search strategies were developed for

each database searched. These were based on the search strategy developed for MEDLINE via OVID (see Appendix 3 )

but revised appropriately for each database to take account of differences in controlled vocabulary and syntax rules.

It was decided not to use the Cochrane Highly Sensitive Search Strategy for identifying randomised controlled trials in

MEDLINE (as referenced in Chapter 6.4.11.1 and detailed in box 6.4.c of the Cochrane Handbook for Systematic Reviews

of Interventions Version 5.0.2, updated September 2009), this was because of poor yield. The subject search used a

combination of controlled vocabulary and free text terms.

The following databases were searched.

The Cochrane Oral Health Group Trials Register (to 23rd September 2009) (Appendix 1 ).

The Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2009, Issue 4) (Appendix 2 ).

MEDLINE (1950 to 23rd September 2009) (Appendix 3 ).

EMBASE (1980 to 23rd September 2009) (Appendix 4 ).

ISI Web of Science (SCIE, SSCI) (1981 to 22nd December 2009) (Appendix 5 ).

ISI Web of Science Conference Proceedings (1990 to 22nd December 2009) (Appendix 5 ).

BIOSIS (1985 to 22nd December 2009) (Appendix 6 ).

OpenSIGLE (1980 to 2005) (Appendix 7 ).

Language

The search attempted to identify all relevant studies irrespective of language. Any non-English papers identified were to

be translated and relevant data extracted by members of The Cochrane Collaboration.

Unpublished studies

Researchers, experts and organisations known to be involved in this field were contacted in order to trace unpublished

or ongoing studies. In addition, conference proceedings and abstracts were searched for unpublished studies.

Handsearching

No handsearching was carried out for this review. All relevant journals had either been handsearched as part of the

Cochrane Oral Health Group's handsearching programme (see www.ohg.cochrane.org/handsearching.html for

information) or were fully indexed on MEDLINE and retrieved as part of the electronic searches.

Reference lists of all eligible trials and review articles, and in turn their reference lists, were checked for studies not

already identified.

D A T A C O L L E C T I O N A N D A N A L Y S I S

Data collection and analysis

Selection of studies

Two review authors, Mohammad Owaise Sharif (MOS) and Vishal Aggarwal (VA), independently assessed the abstracts

of studies resulting from the searches. Full text copies of all relevant and potentially relevant studies, those appearing to

meet the inclusion criteria, or for which there were insufficient data in the title and abstract to make a clear decision,

were obtained. The full text papers were assessed independently by these two review authors and any disagreement on

the eligibility of potentially included studies were resolved through discussion and consensus. If consensus could not be

reached by the two review authors (MOS and VA), a third review author (Martin Tickle (MT)) was consulted. After

assessment by the review authors, any duplicate publications or remaining studies that did not match the inclusion

criteria were excluded and the reasons for their exclusion noted.

In this review, we did not find any eligible study to be included. If any studies were eligible, the following steps were to

be taken.

Data extraction and management

Data would have been extracted independently by the two review authors (MOS and VA) using specially designed data

extraction forms. For each trial included, the following would have been recorded and presented in study tables: thedate that the study was conducted, the country, year of publication and its duration; details of study design, types of


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intervention, treatments, controls, outcomes; sample size, number recruited, details of withdrawals by study group, age

and characteristics of subjects; outcomes, assessment methods and time intervals; study setting and source of funding.

If necessary, authors were to be contacted for further information and/or clarification of their publications.

Assessment of risk of bias in included studies

If any relevant studies had been identified, two review authors (MOS and VA) would have independently graded the

relevant trials following the domain-based evaluation described in the Cochrane Handbook for Systematic Reviews of

Interventions 5.0.2 (updated September 2009) (Higgins 2009 ). The review authors would then have comparedevaluations and discussed and resolved any disagreements.

An assessment of the overall risk of bias would have involved the consideration of the relative importance of different

domains and studies were to be categorised as low, high or unclear risk of bias.

The review authors were to assess the following domains as 'Yes' (i.e. low risk of bias), 'Unclear' (uncertain risk of bias)

or 'No' (i.e. high risk of bias):

adequate sequence generation;

allocation concealment;

blinding (of participants, personnel and outcome assessors);

incomplete outcome data addressed;

free of selective outcome reporting;

free of other bias.

Risk of bias would have been categorised according to the following:

Low risk of bias (plausible bias unlikely to seriously alter the results) if all criteria were met;

Unclear risk of bias (plausible bias that raises some doubt about the results) if one or more criteria were assessed as

unclear; or

High risk of bias (plausible bias that seriously weakens confidence in the results) if one or more criteria were not met.

The review authors would have reported these assessments for included studies in a risk of bias in included studies table

in Review Manager (RevMan).

Measures of treatment effect

The effect measures of choice were to be dichotomous data (risk ratio) or time-to-event data.

Dealing with missing data

Proportions of participants for whom outcome data were not provided would have been recorded in the study table.

Missing data would have been dealt with by undertaking available case and intention-to-treat analyses and comparing

these using sensitivity analysis.

Assessment of heterogeneity

Heterogeneity was to be assessed by examination of the types of participant, intervention and outcome measure in each

study. The significance of discrepancies in the estimates of the treatment effects from the different trials would have

been assessed by means of Cochran's test for heterogeneity. Heterogeneity would have been investigated if P < 0.01.

Heterogeneity would have been quantified using the I2 statistic.

Assessment of reporting biases

Publication and other reporting biases would have been tested for using funnel plots and appropriate statistical tests.

Data synthesis (meta-analysis)

Meta-analysis would only have been undertaken using comparable studies in which the same outcome measures were

reported. Heterogeneity would have firstly been assessed by examining the types of participant, interventions and

outcomes in each study. For dichotomous outcomes, the estimate of an intervention would have been summarised as

risk ratios with 95% confidence intervals. Any continuous outcomes would have been recorded as mean differences with

95% confidence intervals. Random-effects models would have been used for all analyses involving more than three trials

otherwise fixed-effect models were to be used.

Adverse effects


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Any unexpected or adverse events/outcomes were to be documented if identified in included randomised controlled

trials.

Sensitivity analysis

Sensitivity analysis would have been undertaken to assess the effects of randomisation, allocation concealment and

blinding on the overall estimates of effect.

Subgroup analyses

Subgroup analyses would have been undertaken to take account of the use of different inclusion criteria, participants,

interventions, techniques, materials, or outcome measures if appropriate.

Choice of summary statistic and estimate of overall effect

The Cochrane Collaboration statistical guidelines were to be followed, and risk ratio values would have been calculated

along with 95% confidence intervals. If sufficient studies were identified a sensitivity analysis would have been

undertaken to examine the effect of concealed allocation and blind outcome assessment on the overall estimates of

effect.

M E T H O D O L O G I C A L Q U A L I T Y

R E S U L T S

Results

Description of studies

See: Characteristics of excluded studies .

The search strategy retrieved 145 references to studies after de-duplication. After examination of the titles and abstracts

of these references, all but three studies (Moncada 2006 ; Moncada 2008 ; Moncada 2009 ) were eliminated and

excluded from further review. Full text copies of these remaining studies were sought and subjected to further

evaluation. The bibliographical references of these studies were examined but did not provide any additional citations to

potentially eligible studies. Finally, none of the retrieved studies met our inclusion criteria: Moncada 2008 reported on

the same set of patients as Moncada 2006 , however, this was at a 2-year follow-up as opposed to a 1-year follow-up.This was confirmed by contacting the authors. In these studies it was stated that the patients were randomly allocated

to treatment groups but the method of randomisation was not stated; the authors were contacted, they advised that

patients were not randomly allocated to treatment groups. In the results section, the deterioration of repaired

restorations was not reported in a manner to allow differentiation between the repair materials used and so the results

were unusable. The authors were contacted for further analysis or provision of raw data but this information remains

outstanding. Because the patients were not randomly allocated to treatment groups, these studies were excluded. In the

Moncada 2009 study, patients were not randomly allocated to treatment groups, they were assigned into groups

dependant on defect type, therefore this study was also excluded.

Risk of bias in included studies

The searches retrieved no randomised controlled trials relevant to this systematic review and thus no assessments of

methodological quality were conducted. If relevant trials had been identified then risk of bias would have been assessed

as outlined in the 'Data collection and analysis' section.

Effects of interventions

Although 145 studies were retrieved in our comprehensive search of the literature, none of them were eligible for

inclusion for the reasons stated, and therefore no data were available for analysis.

D I S C U S S I O N

Discussion

The present review sought high level evidence on the effectiveness of managing defective amalgam restorations in

permanent molar and premolar teeth by replacing (with amalgam) compared with repairing (with amalgam). We found

no studies eligible for inclusion in this review.

The two randomised trials retrieved, Moncada 2008 and Moncada 2006 , reported on the same set of patients at


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different follow-up periods. The sample size has not been justified, the method of randomisation was not stated, the

results regarding the deterioration of repaired restorations were not reported in a manner to allow differentiation

between the repair materials used and so the results were unusable. No mention of allocation concealment, blinding of

patient, outcome assessor blinding or reasons for patient withdrawal were given. The authors were contacted for further

information and only advised that outcome assessors were blinded.

The results from the articles retrieved suggest that repair of restorations could be effective and the survival rate at

2-year follow-up is good. This may be important because some repairs can be done without the use of local anaesthesia

and are therefore less distressing for a patient when compared with replacement.

A U T H O R S ' C O N C L U S I O N S

Implications for practice

There are no published randomised controlled clinical trials relevant to this review question. In the absence of any high

level reliable evidence, clinicians should base their decisions on clinical experience, individual circumstances and in

conjunction with patients' preferences where appropriate. The results from the articles retrieved do suggest that repair

of restorations could be effective and the survival rate at 2-year follow-up is good. This may be important because some

repairs can be done without the use of local anaesthesia and are therefore less distressing for a patient when compared

with replacement.

Implications for research

The results of this systematic review confirm the need for methodologically sound randomised controlled clinical trials

that are reported according to the Consolidated Standards of Reporting Trials (CONSORT) statement (www.consort-

statement.org/). Important consideration should be given to the method of randomisation, justifying sample size,

allocation concealment, blinding of patients, outcome assessor blinding and reasons for patients lost to follow-up during

the planning, conducting and reporting phase of the study. All the studies retrieved were medium-term (less than 5

years), a longer term follow-up would be better (5 years and above). Further research needs to explore qualitatively the

views of patients on repairing versus replacement and investigate themes around pain, distress and anxiety, time and

costs which will all be relevant and perhaps support repairing as this is less distressing, can be considerably cheaper and

quicker to implement.

A C K N O W L E D G E M E N T S

Acknowledgements

Dr Anne-Marie Glenny, Mrs Sylvia Bickley, Miss Anne Littlewood and Mrs Luisa M Fernandez Mauleffinch.

N O T E S

R E F E R E N C E S

* indicates the major publication for the study

References to studies excluded from this review

Moncada 2006 {published data only}

Moncada GC, Martin J, Fernandez E, Vildosola PG, Caamano C, Caro MJ. Alternative treatments for

resin-based composite and amalgam restorations with marginal defects: a 12-month clinical trial. GeneralDentistry 2006;54:314-8.


Moncada G, Fernandez E, Martin J, Arancibia C, Mjor IA, Gordan VV. Increasing the longevity of

restorations by minimal intervention: a two-year clinical trial. Operative Dentistry 2008;33:258-64.


Moncada G, Martin J, Fernandez E, Hempel MC, Mjor IA, Gordan VV. Sealing, refurbishment and repair of

Class I and Class II defective restorations: a three-year clinical trial. Journal of the American Dental

Association 2009;140:425-32.

Additional references

Burke 1999


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Burke FJ, Cheung SW, Mjor IA, Wilson NH. Reasons for the placement and replacement of restorations in

vocational training practices. Primary Dental Care 1999;6:17-20.

Burke 2002

Burke FJ, Wilson NH, Cheung SW, Mjor IA. Influence of the method of funding on the age of failed

restorations in general dental practice in the UK. British Dental Journal 2002;192:699-702.

Cook 1981

Cook AH. Amalgam addition restorations. Dental Update 1981;8:457-63.

Deligeorgi 2000

Deligeorgi V, Wilson NH, Fouzas D, Kouklaki E, Burke FJ, Mjor IA. Reasons for placement and replacement

of restorations in student clinics in Manchester and Athens. European Journal of Dental Education

2000;4:153-9.

DPB 2003

Dental Practice Board. GDS treatment items by country and broad age group. Detailed analyses for the

year ending March 2003. :-.

Drake 1990

Drake CW, Maryniuk GA, Bentley C. Reasons for restoration replacement: differences in practice patterns.

Quintessence International 1990;21:125-30.

Elderton 1990

Elderton RJ. Clinical studies concerning re-restoration of teeth. Advances in Dental Research 1990;4:4-9.

Higgins 2009

Higgins JPT, Green S (editors). Cochrane Handbook for Systematic Reviews of Interventions 5.0.2

[updated September 2009]. The Cochrane Collaboration, 2009. :-.

Mjor 1992

Mjor IA, Toffenetti F. Placement and replacement of amalgam restorations in Italy. Operative Dentistry

1992;17:70-3.

Mjor 1993

Mjor IA. Repair versus replacement of failed restorations. International Dental Journal 1993;43:466-72.

Mjor 1998

Mjor IA, Reep RL, Kubilis PS, Mondragon BE. Change in size of replaced amalgam restorations: a

methodological study. Operative Dentistry 1998;23:272-7.

Mjor 2000

Mjor IA, Moorhead JE, Dahl JE. Reasons for replacement of restorations in permanent teeth in general

dental practice. International Dental Journal 2000;50:361-6.

Mjor 2002a

Mjor IA, Shen C, Eliasson ST, Richter S. Placement and replacement of restorations in general dental

practice in Iceland. Operative Dentistry 2002;27:117-23.

Mjor 2002b

Mjor IA, Gordan VV. Failure, repair, refurbishing and longevity of restorations. Operative Dentistry

2002;27:528-34.

Paterson 1995

Paterson FM, Paterson RC, Watts A, Blinkhorn AS. Initial stages in the development of valid criteria for

the replacement of amalgam restorations. Journal of Dentistry 1995;23:137-43.

Ryge 1981

Ryge G, Jendresen MD, Glantz PO, Mjor I. Standardization of clinical investigators for studies of


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restorative materials. Swedish Dental Journal 1981;5:235-9.

Setcos 2004

Setcos JC, Khosravi R, Wilson NH, Shen C, Yang M, Mjor IA. Repair or replacement of amalgam

restorations: decisions at a USA and a UK dental school. Operative Dentistry 2004;29:392-7.

Wilson 1999

Wilson NHF, Setcos JC, Brunton P. Replacement or repair of dental restorations. In: Roulet JF,Wilson NHF, Fuzzi M, editor(s). Advances in Operative Dentistry: Contemporary Clinical Practice Vol. 1,

Quintessence, 1999:105-15.

C O V E R S H E E T

Replacement versus repair of defective restorations in adults: amalgam

Reviewer(s) Sharif Mohammad O, Merry Alison, Catleugh Melanie, Tickle Martin,

Brunton Paul, Dunne Stephen M, Aggarwal Vishal R

Contribution of Reviewer(s)

Issue protocol first published 2006 issue 2

Issue review first published 2010 issue 2

Date of last minor amendment Information not supplied by reviewer

Date of last substantive amendment Information not supplied by reviewer

Most recent changes

Date new studies sought but none

found

Information not supplied by reviewer

Date new studies found but not yet

included/excluded


Date new studies found and

included/excluded


Date reviewers' conclusions section

amended


Contact address Brunton

Clarendon Way

Higher Cambridge Street

Ruckhall Lane

Belmont

Walshaw House

Regent Street

Higher Cambridge Street

Denmark Hill Campus

Caldecot RoadLeeds

Manchester

Hereford

Nelson

Manchester

London

UK

UK


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UK

UK

UK

UK

LS2 9LU

M15 6FH

HR2 9RP

BB9 8AS

M15 6FH

SE5 9RW

Telephone:

Facsimile:

E-mail: [email protected]

Cochrane Library number CD005970

Editorial group Cochrane Oral Health Group

Editorial group code HM-ORAL

K E Y W O R D S

Adult; Humans; *Dental Restoration Failure ; Dental Amalgam [*therapeutic use] ; Dental Restoration, Permanent

[*methods] ; Retreatment [methods]

H I S T O R Y

History

Protocol first published: Issue 2, 2006

Review first published: Issue 2, 2010

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