Results of surgery for @entity5479 were investigated in 202 ears of 197 @entity1 who had undergone surgery by the staged intact canal wall technique. Surgical procedures used in the second stage for prevention of a retraction pocket were classified into three types: Type S1, no scutumplasty; Type S2, scutumplasty; Type S3, scutumplasty plus @entity2267 . Recurrent @entity3540 was found in 9 ears (4%) and retraction pocket in 47 ears (23%). They occurred between 2 and 120 months (average: 26 months) after the second stage, most frequently at 1 to 3 years. The incidence was higher after Type S3 surgery than after the other types, probably because the middle ear was severely involved in @entity1 who were indicated Type S3 surgery. For prevention of a retraction pocket, bone putty and cartilage were proved to be appropriate materials for scutumplasty, and @entity692 for @entity2267 . As the retraction pocket tended to recur in @entity1 with the pocket at the second stage, these @entity1 needed obliteration of the mastoid cavity to prevent a retraction pocket. Postoperative hearing was evaluated according to the criteria proposed by the Japan Society of Clinical Otology. Of 145 ears of the 142 @entity1 who were followed for more than 1 year, 118 ears (81%) the surgery was judged successful. The success rate in hearing was in good accordance with the condition of the tympanic membrane.

Staged intact canal wall tympanoplasty for treatment of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity692 :: ('MESH:D017886', 'Chemical') :: ['hydroxyapatite'] @entity5479 :: ('MESH:D018424', 'Disease') :: ['middle ear cholesteatoma'] @entity3540 :: ('MESH:D002781', 'Disease') :: ['cholesteatoma'] @entity2267 :: ('MESH:D008417', 'Disease') :: ['mastoid obliteration']
@entity5479 :: (MESH:D018424,Disease) :: ['middle ear cholesteatoma']
