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Submitted
KYALE DRKISUMBIBERNINA, M DRWAKIAGAJOHN. "Mungai T.C. Kisumbi B.K Wakiaga J.M and Ireri S.K : Patients.". In: Journal of Dental Research. University of Nairobi Press; Submitted. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical duties to dental auxiliaries and medical emergencies were rare.
KYALE DRKISUMBIBERNINA, M DRWAKIAGAJOHN. "Wakiaga J.M and Kisumbi B.K: In-vitro colour changes of resin composites in beverages. Journal of Dental Research.". In: Journal of Dental Research. University of Nairobi Press; Submitted. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical duties to dental auxiliaries and medical emergencies were rare.
W DRMAINASUSAN, M DRWAKIAGAJOHN. "Wakiaga J.M., Maina S.W and Kisumbi B.K. Incidence of the Second Canal the Upper Second Premolar. Journal of Dental Research 13th Annual Scientific Conference of the East and Southern Division of IADR.". In: Journal of Dental Research. University of Nairobi Press; Submitted. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical duties to dental auxiliaries and medical emergencies were rare.
KYALE DRKISUMBIBERNINA, M DRWAKIAGAJOHN. "Wakiaga J.M., Maina S.W., Kisumbi B.K. : Incidence of the second Canal in the upper Second Premolar. (Journal of Dental Research).". In: Journal of Dental Research. University of Nairobi Press; Submitted. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical duties to dental auxiliaries and medical emergencies were rare.
2008
Lesan WR, Kisumbi BK, Wakiaga JM. "Some Optical properties of Resin Composite Veneer materials.". 2008. Abstract

To evaluate the optical properties of some specimen materials with a view to establishing its behaviour under dry-storage and wet-storage conditions. The transmission of light through translucent composite materials used in veneering/masking procedures in dentistry may be affected by a number of factors including the storage conditions. Material and methods: The absorbency of refracted light was determined from the understanding of Beer-Lambert's Law. Results: Dry-storage over 9 months had little effect on absorbency, significant changes were observed after 3 months of wet storage. While this offers a vital trade-off between cost effectiveness and initial aesthetics, it still remains of interest to investigate whether the achieved colour at baseline stabilises over time and whether further deterioration in terms of colour and aesthetics diminishes

M DRWAKIAGAJOHN. "Watts DC, Issa M, Ibrahim A, Wakiaga J, Al-Samadani K, Al-Azraqi M, Silikas N.Edge strength of resin-composite margins. Dent Mater. 2008 Jan;24(1):129-33. Epub 2007 Jun 18.". In: Dent Mater. 2008 Jan;24(1):129-33. Epub 2007 Jun 18. University of Nairobi Press; 2008. Abstract

OBJECTIVES: Marginal integrity is a major clinical problem in restorative dentistry. The aim of this study was to evaluate the applicability of an edge strength measurement device in an in vitro test to determine the force required to fracture flakes of material by a Vickers indentation at progressively increasing distances from an interface edge of bulk material. METHODS: Five representative resin-composites were investigated. Fourteen disks of specimens (12mm diameter x 2.5mm thick) were prepared for each material. These were divided into seven sub-groups corresponding to different edge-distances (0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0mm). An edge strength measurement device (CK10) (Engineering Systems, Nottingham, UK) was used. The mode of the failure of each specimen was examined under the integral microscope of the CK10. RESULTS: The force (N)-to-fracture at a distance of 0.5mm from the edge was defined as the edge strength. The highest failure force (edge strength) was observed for Tetric Ceram (174.2N) and the lowest for Filtek Supreme (enamel) (87.0N). Correlations between the failure-forces to fracture materials with edge-distance were regression analyzed giving coefficients (r) ranging from 0.94 (p=0.02) to 0.99 (p=0.01). Two modes of failure were observed: chipping and–generally at greater distances–cracking. SIGNIFICANCE: Edge strength is a definable and potentially useful parameter to characterize this aspect of clinically related behavior. A standardized distance of 0.5mm from the specimen's edge, when chipping failure prevails, is suitable and convenient as a reference point.

2007
M DRWAKIAGAJOHN. "Wakiaga J, Kisumbi BK, and Lesan WR Some Optical Properties in Resin Composite Veneer Materials. A Pilot Study Submitted to the Journal of the Kenya Dental Association 2007.". In: Dent Mater. 2008 Jan;24(1):129-33. Epub 2007 Jun 18. University of Nairobi Press; 2007. Abstract

OBJECTIVES: Marginal integrity is a major clinical problem in restorative dentistry. The aim of this study was to evaluate the applicability of an edge strength measurement device in an in vitro test to determine the force required to fracture flakes of material by a Vickers indentation at progressively increasing distances from an interface edge of bulk material. METHODS: Five representative resin-composites were investigated. Fourteen disks of specimens (12mm diameter x 2.5mm thick) were prepared for each material. These were divided into seven sub-groups corresponding to different edge-distances (0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0mm). An edge strength measurement device (CK10) (Engineering Systems, Nottingham, UK) was used. The mode of the failure of each specimen was examined under the integral microscope of the CK10. RESULTS: The force (N)-to-fracture at a distance of 0.5mm from the edge was defined as the edge strength. The highest failure force (edge strength) was observed for Tetric Ceram (174.2N) and the lowest for Filtek Supreme (enamel) (87.0N). Correlations between the failure-forces to fracture materials with edge-distance were regression analyzed giving coefficients (r) ranging from 0.94 (p=0.02) to 0.99 (p=0.01). Two modes of failure were observed: chipping and–generally at greater distances–cracking. SIGNIFICANCE: Edge strength is a definable and potentially useful parameter to characterize this aspect of clinically related behavior. A standardized distance of 0.5mm from the specimen's edge, when chipping failure prevails, is suitable and convenient as a reference point.

M DRWAKIAGAJOHN. "Watts DC, Issa M, Ibrahim A, Wakiaga J, Al-Samadani K, Al-Azraki M and Silikas N. Edge Strength of Resin Composite .". In: Dent Mater. 2008 Jan;24(1):129-33. Epub 2007 Jun 18. University of Nairobi Press; 2007. Abstract

OBJECTIVES: Marginal integrity is a major clinical problem in restorative dentistry. The aim of this study was to evaluate the applicability of an edge strength measurement device in an in vitro test to determine the force required to fracture flakes of material by a Vickers indentation at progressively increasing distances from an interface edge of bulk material. METHODS: Five representative resin-composites were investigated. Fourteen disks of specimens (12mm diameter x 2.5mm thick) were prepared for each material. These were divided into seven sub-groups corresponding to different edge-distances (0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0mm). An edge strength measurement device (CK10) (Engineering Systems, Nottingham, UK) was used. The mode of the failure of each specimen was examined under the integral microscope of the CK10. RESULTS: The force (N)-to-fracture at a distance of 0.5mm from the edge was defined as the edge strength. The highest failure force (edge strength) was observed for Tetric Ceram (174.2N) and the lowest for Filtek Supreme (enamel) (87.0N). Correlations between the failure-forces to fracture materials with edge-distance were regression analyzed giving coefficients (r) ranging from 0.94 (p=0.02) to 0.99 (p=0.01). Two modes of failure were observed: chipping and–generally at greater distances–cracking. SIGNIFICANCE: Edge strength is a definable and potentially useful parameter to characterize this aspect of clinically related behavior. A standardized distance of 0.5mm from the specimen's edge, when chipping failure prevails, is suitable and convenient as a reference point.

2006
2004
M DRWAKIAGAJOHN. "Wakiaga J, Brunton P, Silikas N, Glenny AM.Direct versus indirect veneer restorations for intrinsic dental stains.Cochrane Database Syst Rev. 2004;(1):CD004347.Click here to read.". In: Cochrane Database Syst Rev. 2004;(1):CD004347. University of Nairobi Press; 2004. Abstract

BACKGROUND: Patients with discoloured teeth frequently present to the dentist requesting restorations designed to improve their appearance. For teeth that are sound, this might include the use of a veneer restoration. The veneer acts as a thin layer of a material covering the labial surface of a tooth and can be applied directly to the tooth, or by using indirect methods. OBJECTIVES: To examine the effectiveness of direct versus indirect laminate veneer restorations. SEARCH STRATEGY: The following electronic databases were searched: The Cochrane Oral Health Group's Trials Register, The Cochrane Central Register of Controlled Trials (CENTRAL), (The Cochrane Library Issue 3, 2002), MEDLINE (1980 to 19/11/2002) and EMBASE (1980 to 19/11/2002). There was no restriction on language. SELECTION CRITERIA: All randomised controlled trials (RCTs) of participants with permanent anterior teeth suitable for restorations using laminate veneers, comparing direct (different composite materials) and indirect techniques for making dental veneers. The indirect restorations may be either composite or porcelain. The primary outcome was restoration failure. DATA COLLECTION AND ANALYSIS: Assessment of relevance and validity and data extraction were conducted in triplicate. Authors of the primary studies were contacted to provide additional information as necessary. MAIN RESULTS: Six full publications were screened as being potentially relevant to the review, only one trial was found to meet the review's inclusion criteria. Although the trial met the review's inclusion criteria with regard to participant characteristics, interventions and outcomes assessed, problems with the reporting of the data prevented any statistical analysis of the results. REVIEWER'S CONCLUSIONS: There is no reliable evidence to show a benefit of one type of veneer restoration (direct or indirect) over the other with regard to the longevity of the restoration.

1997
M DRWAKIAGAJOHN. "Clinico-pathological analysis of jaw tumours and tumour-like conditions at the Kenyatta national hospital. East Afr Med J. 1997 Feb;74(2):65-8.". In: East Afr Med J. 1997 Feb;74(2):65-8. University of Nairobi Press; 1997. Abstract
This paper presents an analysis of 568 jaw tumours and tumour-like conditions seen at the Kenyatta National Hospital over a period of fifteen years. For descriptive purposes, the term tumour is used here in its wider context to cover both neoplastic and dysplastic jaw lesions which present primarily as jaw swellings. The study reveals a pattern consistent with other African series and suggests a more aggressive progression and younger age at onset than elsewhere.
1996
M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Wakiaga J.M., Kaimenyi J.T. and Kisumbi B,K.: Chair-side experience and reason underlying failure to seek medical treatment. East African Medical Journal 73: 320-322, 1996.". In: East African Medical Journal 73: 320-322, 1996. University of Nairobi Press; 1996. Abstract
This paper presents an analysis of 568 jaw tumours and tumour-like conditions seen at the Kenyatta National Hospital over a period of fifteen years. For descriptive purposes, the term tumour is used here in its wider context to cover both neoplastic and dysplastic jaw lesions which present primarily as jaw swellings. The study reveals a pattern consistent with other African series and suggests a more aggressive progression and younger age at onset than elsewhere.
M DRWAKIAGAJOHN. "Wakiaga JM, Kaimenyi JT, Kisumbi BK.Reasons underlying failure to seek dental treatment among Nairobi University students. East Afr Med J. 1996 May;73(5):320-2.". In: East Afr Med J. 1996 May;73(5):320-2. University of Nairobi Press; 1996. Abstract
A survey of 272 University of Nairobi undergraduate students was undertaken to assess their dental chairside experience and what reasons they gave for failing to seek dental treatment. Most respondents considered dental treatment uncomfortable and painful. The cost of treatment and fear arising from information given by other dental patients were important reasons that kept the respondents from visiting a dental clinic. This paper reveals the need for the dental profession to play a greater role in reducing costs of treatment and odontophobia.
1995
M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Kisumbi B.K., Kaimenyi J. T. and Wakiaga J.M.: Knowledge on treatment modalities and attitude of Nairobi University students toward Dental care. Indian Journal of Dental Research, 133-136, 1995.". In: Indian Journal of Dental Research, 133-136, 1995. University of Nairobi Press; 1995. Abstract
This paper presents the age, sex and site distribution of oral tumours and tumour like conditions in Kenya. It confirms some important points. First, there is an overall lower mean age for oral tumours in African series compared to non African series. Secondly, sex bias in the distribution of oral tumours is less marked for most tumours in Africans. Thirdly, there is difference in site distribution and oral tumours between Africans and non-African populations.
M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Onyango J. F., Awange D.O., and Wakiaga, J.M.: Oral Tumours and Tumour-like conditions in Kenya: I Histological distribution. East African Medical Journal 72: 560-563, 1995.". In: East African Medical Journal 72: 560-563, 1995. University of Nairobi Press; 1995. Abstract

A histological analysis of 3141 cases of oral tumours and tumour-like lesions diagnosed at Kenyatta National Hospital between 1978 and 1992 has been carried out. Squamous cell carcinoma, salivary gland tumours and lymphoid tumours form the majority of lesions. In general, the histological distribution of the oral tumours do not differ significantly from those reported in non African series save for the Burkitt's lymphoma.

M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Onyango J.F.,Awange D.O. and Wakiaga J.M.: Oral Tumours and Tumourlike conditions in Kenya: II Age, Sex and Site distribution. East African Medical Journal, 72: 568-576, 1995.". In: East African Medical Journal, 72: 568-576. University of Nairobi Press; 1995. Abstract
This paper presents the age, sex and site distribution of oral tumours and tumour like conditions in Kenya. It confirms some important points. First, there is an overall lower mean age for oral tumours in African series compared to non African series. Secondly, sex bias in the distribution of oral tumours is less marked for most tumours in Africans. Thirdly, there is difference in site distribution and oral tumours between Africans and non-African populations.
M DRWAKIAGAJOHN. "Onyango JF, Awange DO, Wakiaga JM.Oral tumours and tumour-like conditions in Kenya: II. Age, sex and site distribution. East Afr Med J. 1995 Sep;72(9):568-76.". In: East Afr Med J. 1995 Sep;72(9):568-76. University of Nairobi Press; 1995. Abstract
This paper presents the age, sex and site distribution of oral tumours and tumour like conditions in Kenya. It confirms some important points. First, there is an overall lower mean age for oral tumours in African series compared to non African series. Secondly, sex bias in the distribution of oral tumours is less marked for most tumours in Africans. Thirdly, there is difference in site distribution and oral tumours between Africans and non-African populations.
M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Wakiaga J,M., Kisumbi B.K. and ChindiaM.L.: Discolouration of Teeth: An overview of the diagnosis and management. East African Medical Journal, 72: 213-216, 1995.". In: East African Medical Journal, 72: 213-216, 1995. University of Nairobi Press; 1995. Abstract
The dentist is faced with a daunting task in application of clinical skills to achieve maximum cosmetic results when it comes to the management of discoloured and/or hypoplastic dentition. In this paper, an overview is made of the diagnosis and the management of these broadly termed conditions and the cost-effectiveness of the various modalities discussed.
1994
M DRWAKIAGAJOHN, M DRWAKIAGAJOHN. "Kaimenyi, J., T., Guthua S.,W., Wakiaga J.M. and Kisumbi B.K.: Utilisation of Dental Auxiliaries in Private Dental Surgeries in Kenya. East African Medical Journal 71: 811-85,1994.". In: East Afr Med J. 1995 Sep;72(9):568-76. University of Nairobi Press; 1994. Abstract
This paper presents the age, sex and site distribution of oral tumours and tumour like conditions in Kenya. It confirms some important points. First, there is an overall lower mean age for oral tumours in African series compared to non African series. Secondly, sex bias in the distribution of oral tumours is less marked for most tumours in Africans. Thirdly, there is difference in site distribution and oral tumours between Africans and non-African populations.
KYALE DRKISUMBIBERNINA, M DRWAKIAGAJOHN. "Kaimenyi, J.T., Guthua, S.W., J.M Wakiaga., Kisumbi, B.K. Utilization of Dental auxiliaries - in private Dental surgeries in Kenya. East African Medical Journal 71: 811-815: 1994.". In: East African Medical Journal 71: 811-815: 1994. University of Nairobi Press; 1994. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical
KYALE DRKISUMBIBERNINA, M DRWAKIAGAJOHN. "Utilization of dental auxiliaries in private dental surgeries in Kenya. East Afr Med J. 1994 Dec;71(12):811-5.". In: East Afr Med J. 1994 Dec;71(12):811-5. University of Nairobi Press; 1994. Abstract
This study was done to determine the nature of utilization of dental auxiliaries and medical emergencies in private dental surgeries in Kenya. A self administering questionnaire with pre-paid postage was mailed to 138 dentists. 27.5% responded. 81.6% used dental auxiliaries and the main reason was to improve efficiency in managing patients. 93.5% of the auxiliaries were on job trained secondary school graduates. 63.2% of the respondents delegated duties which were mainly non-clinical. 26.3% did not delegate any duties. In a descending order, the reasons for non delegation were: that it would be risky to patients, not allowed by law, they did not find it necessary and that auxiliaries were not held responsible if something went wrong. The main duties delegated to the auxiliaries were cleaning of instruments and sterilization, mixing of restorative materials and preparing amalgam. Delegation was done primarily based on auxiliaries capability to perform the procedure and meet the set standards. 57.9% indicated that they rarely encountered medical emergencies. Syncope was the commonest emergency encountered. 72.7% indicated that auxiliaries could not handle medical emergencies because they were not trained. It is concluded that most dentists did not delegate clinical duties to dental auxiliaries and medical emergencies were rare.

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