Table
1      Original diagnosis and
anatomical sites in 51 patients with overt ORN 
      Anatomical site
     | 
    
      No.
      of patients
     | 
  
| 
       Tonguea  | 
    
       1  | 
  
| 
       Floor of moutha  | 
    
       8  | 
  
| 
       Palatea  | 
    
       5  | 
  
| 
       Oropharynx/pharynxa  | 
    
       5  | 
  
| 
       Buccal/lingual mucosaa  | 
    
       4  | 
  
| 
       Nose/nasopharynxa  | 
    
       3  | 
  
| 
       Oral cavitya  | 
    
       3  | 
  
| 
       Retromolar trigonea  | 
    
       2  | 
  
| 
       Mandiblea  | 
    
       2  | 
  
| 
       Lymphoma  | 
    
       2  | 
  
| 
       Actinomycotic infection  | 
    
       1  | 
  
| 
       Submandibular gland tumour  | 
    
       1  | 
  
| 
       asquamous cell carcinoma  | 
    
          | 
  
Table
2
           Treatment
outcomes of HBO used for overt ORN 
        Treatment | 
      
         No. of
        patients  | 
      
         Success  | 
      
         Improvement  | 
      
         No improvement  | 
    
| 
         HBO alone  | 
      
         19  | 
      
         7  | 
      
         11  | 
      
         1  | 
    
| 
         HBO and sequestrectomy  | 
      
         20  | 
      
         18  | 
      
         1  | 
      
         1  | 
    
| 
         HBO and resection  | 
      
         12  | 
      
         11  | 
      
         0  | 
      
         1  | 
    
Table
3
           Treatment
outcomes in ORN prophylaxis group 
      Treatment | 
    
      Extractions | 
    
      Complications
     | 
  
| 
       Nonsurgical  | 
    
       36  | 
    
       1  | 
  
| 
       Surgical  | 
    
       18  | 
    
       0  | 
  
![]()  | 
  
| Figure 1: Multiplace hyperbaric oxygen chamber capable of housing several patients and a therapist during a dive. | 
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| Figure 2: Two side-by-side monoplace chambers. The clear glass allows patients to watch television or videos and helps assuage fears of confinement in claustrophobic patients. |