Primary

• Dentogingival

  Originates from cementum and spreads laterally into lamina propria
• Alveologingival

  Originates from periosteum and spreads into lamina propria
• Dentoperiosteal


  Originates from cementum near CEJ into periosteum of alveolar crest
• Circular

  Originates from within the free marginal and attached gingiva coronal to alveolar crest and encircles each tooth
• Transseptal

  Originates from interproximal cementum coronal to crest and courses mesially and distally in the interdental area into cementum of adjacent teeth