Prevalence of complications associated with polymer-based alloplastic materials in nasal dorsal augmentation: a systematic review and meta-analysis
	    		
		   		
		   			
		   		
	    	
    	 
    	10.1186/s40902-022-00344-8
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Seied Omid KEYHAN
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Shaqayeq RAMEZANZADE
			        		
			        		;
		        		
		        		
		        		
			        		Reza Golvardi  YAZDI
			        		
			        		;
		        		
		        		
		        		
			        		Mohammad Amin VALIPOUR
			        		
			        		;
		        		
		        		
		        		
			        		Hamid Reza  FALLAHI
			        		
			        		;
		        		
		        		
		        		
			        		Madjid SHAKIBA
			        		
			        		;
		        		
		        		
		        		
			        		Mahsa  AEINEHVAND
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Maxillofacial Surgery & Implantology & Biomaterial Research Foundation, Tehran, Iran
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Review
 
        	
        	
            
            
            	- From:Maxillofacial Plastic and Reconstructive Surgery
	            		
	            		 2022;44(1):17-
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:English
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	 Background:Various techniques with different grafts and implants have been proposed to establish a smooth and symmetric nasal dorsum with adequate function. Broadly, two categories of materials have been used in this regard: alloplastic implant materials and autograft materials. The aim of these meta-analyses is to explore the incidence of complications after dorsum augmentation surgery using alloplastic materials. 
				        	
				        
				        	Materials and methods:After duplication removal 491 papers remained that title and abstract were assessed for eligibility. Regarding the study type, 27 observational studies were included, 21 retrospective and 6 prospective case series. A total of 3803 cases were enrolled in this systematic review and meta-analysis.ResultTwenty-seven articles reported on complications and outcomes of dorsal augmentation rhinoplasty with synthetic materials. In a random-effects model, the weighted mean percentage was 2.75% (95% CI 1.61 to 4.17%). the weighted mean percentage were 1.91% (95% CI 0.77 to 3.54%), 0.72% (95% CI 0.316 to 1.31%), and 0.78% (95% CI 0.43 to 1.24%) respectively. 
				        	
				        
				        	Conclusion:The widely used alloplasts were expanded polytetrafluoroethylene (ePTFE), high-density polyethylene, and silicone. The total rates for complications, infection, deviation, irregularity, hematoma, extrusion, and overcorrection were 2.75%, 1.91%, 0.72%, 0.70%, 0.78%, and 0.49%, respectively. The revision rate, based on the random effects model, was 6.40% with 95%CI (3.84 to 9.57).