Reem Mohamed - Academia.edu (original) (raw)

Papers by Reem Mohamed

Research paper thumbnail of Apical Debris Extrusion and Root Canal Cleanliness Using Several Rotary Nickel Titanium Files with Different Kinematics In Round and Oval Canals

Dental Science Updates

Aim: This study was conducted to evaluate and compare the amount of apically extruded debris and ... more Aim: This study was conducted to evaluate and compare the amount of apically extruded debris and canal wall cleanliness using different Ni-Ti instruments (ProTaper file F2, Twisted File 25 and Reciproc R 25) used in continuous rotation and reciprocating motion, in round and oval root canals. Materials and Methods: One hundred twenty extracted single rooted teeth were divided into two groups according to the cross section; 60 round and 60 oval cross section. Each group was subdivided into three subgroups according to the file system (20 ProTaper, 20 Twisted File and 20 Reciproc). Each subgroup was further divided into two divisions according to the motion used (10 rotation and 10 reciprocation). Teeth were mounted in glass vials through holes in the rubber stoppers. The glass vials were weighed before instrumentation. Root canal preparation was performed according to its assigned system according to the manufacturer's instructions, and sterile water was used as root canal irrigant. After instrumentation, the amount of apically extruded debris was evaluated by weighing the samples on the microbalance. Thereafter, roots were longitudinally divided for evaluation of smear layer by Scanning Electron Microscope (SEM). The data were tabulated and subjected to statistical analysis. Results: Reciprocating motion extruded more debris than continuous rotation motion. SEM examination revealed greater amount of smear layer in the oval cross section canal than round cross section canal. Conclusion: All instrumentation techniques and motions were associated with extruded debris. All instrumentation techniques and motions were not capable of completely preparing oval canals.

Research paper thumbnail of Chronic renal failure in Sudanese children: Aetiology and outcomes

Pediatric …, 2009

The provision of tertiary paediatric nephrology facilities has led to increasing referrals of chi... more The provision of tertiary paediatric nephrology facilities has led to increasing referrals of children with chronic renal failure (CRF). We report the aetiology and outcomes over 5 years, during which period the improving socioeconomic situation has allowed increasing provision of dialysis and transplantation. The records of 205 children (124 male; 60.5%) who were referred to a tertiary paediatric nephrology unit in Khartoum between 2001 and 2006 with a glomerular filtration rate of less than 50 ml/min per 1.73 m 2 body surface area were reviewed. The mean age at the time of diagnosis with CRF was 9.8 years (range 3 months-17 years). The aetiology was chronic glomerulonephritis in 52 (25.4%), congenital urological malformations in 36 (17.5%), urolithiasis in 19 (9.3%), hereditary nephropathy in 14 (6.8%), multisystem diseases in 4 (2%), and cause unknown in 80 (39.1%). Of the 205 children, 136 (63%) had reached end-stage renal failure, with chronic haemodialysis being undertaken in 48 (35.3%), intermittent peritoneal dialysis in 43 (31.6%), continuous ambulatory peritoneal dialysis in 17 (14.7%), and no treatment in 25 (18.4%). At the end of the study period 53 of the 205 (25.9%) remained on dialysis, 51 (25%) were on conservative treatment, 8 (3.9%) had received transplants, 48 (23.4%) had died, and 45 (22%) had been lost to followup. The results illustrate the geographical variations in CRF aetiology in different countries, which may be influenced by current patterns of referral as well as environmental and society factors. The large number with an unknown aetiology for their CRF requires further prospective investigation. We hope the current high mortality rate will improve with earlier referral, improved nutrition, family support, and better access to treatment modalities, especially the provision of kidney transplantation from living related donors.

Research paper thumbnail of Apical Debris Extrusion and Root Canal Cleanliness Using Several Rotary Nickel Titanium Files with Different Kinematics In Round and Oval Canals

Dental Science Updates

Aim: This study was conducted to evaluate and compare the amount of apically extruded debris and ... more Aim: This study was conducted to evaluate and compare the amount of apically extruded debris and canal wall cleanliness using different Ni-Ti instruments (ProTaper file F2, Twisted File 25 and Reciproc R 25) used in continuous rotation and reciprocating motion, in round and oval root canals. Materials and Methods: One hundred twenty extracted single rooted teeth were divided into two groups according to the cross section; 60 round and 60 oval cross section. Each group was subdivided into three subgroups according to the file system (20 ProTaper, 20 Twisted File and 20 Reciproc). Each subgroup was further divided into two divisions according to the motion used (10 rotation and 10 reciprocation). Teeth were mounted in glass vials through holes in the rubber stoppers. The glass vials were weighed before instrumentation. Root canal preparation was performed according to its assigned system according to the manufacturer's instructions, and sterile water was used as root canal irrigant. After instrumentation, the amount of apically extruded debris was evaluated by weighing the samples on the microbalance. Thereafter, roots were longitudinally divided for evaluation of smear layer by Scanning Electron Microscope (SEM). The data were tabulated and subjected to statistical analysis. Results: Reciprocating motion extruded more debris than continuous rotation motion. SEM examination revealed greater amount of smear layer in the oval cross section canal than round cross section canal. Conclusion: All instrumentation techniques and motions were associated with extruded debris. All instrumentation techniques and motions were not capable of completely preparing oval canals.

Research paper thumbnail of Chronic renal failure in Sudanese children: Aetiology and outcomes

Pediatric …, 2009

The provision of tertiary paediatric nephrology facilities has led to increasing referrals of chi... more The provision of tertiary paediatric nephrology facilities has led to increasing referrals of children with chronic renal failure (CRF). We report the aetiology and outcomes over 5 years, during which period the improving socioeconomic situation has allowed increasing provision of dialysis and transplantation. The records of 205 children (124 male; 60.5%) who were referred to a tertiary paediatric nephrology unit in Khartoum between 2001 and 2006 with a glomerular filtration rate of less than 50 ml/min per 1.73 m 2 body surface area were reviewed. The mean age at the time of diagnosis with CRF was 9.8 years (range 3 months-17 years). The aetiology was chronic glomerulonephritis in 52 (25.4%), congenital urological malformations in 36 (17.5%), urolithiasis in 19 (9.3%), hereditary nephropathy in 14 (6.8%), multisystem diseases in 4 (2%), and cause unknown in 80 (39.1%). Of the 205 children, 136 (63%) had reached end-stage renal failure, with chronic haemodialysis being undertaken in 48 (35.3%), intermittent peritoneal dialysis in 43 (31.6%), continuous ambulatory peritoneal dialysis in 17 (14.7%), and no treatment in 25 (18.4%). At the end of the study period 53 of the 205 (25.9%) remained on dialysis, 51 (25%) were on conservative treatment, 8 (3.9%) had received transplants, 48 (23.4%) had died, and 45 (22%) had been lost to followup. The results illustrate the geographical variations in CRF aetiology in different countries, which may be influenced by current patterns of referral as well as environmental and society factors. The large number with an unknown aetiology for their CRF requires further prospective investigation. We hope the current high mortality rate will improve with earlier referral, improved nutrition, family support, and better access to treatment modalities, especially the provision of kidney transplantation from living related donors.