Double-layer Graft Research Articles

The effect of single-layer and double-layer graft usage in tympanoplasty on hearing and graft success.

In this study, we investigated whether the use of double layer graft (DLG) in tympanoplasty would increase grafting success rates (GSR) and whether increased graft thickness would negatively affect hearing. The study group consisted of patients with DLG and the control group consisted of patients with single layer graft (SLG). The results of 195 patients in terms of hearing achievement and 211 patients in terms of GSR were compared. Hearing and GSR were analyzed in 103 DLG and 108 SLG patients. Postoperative 6th month air conduction pure tone averages were 25.34 (±14.99) dB in DLG group and 20.50 (±8.82) dB in SLG group. These values were statistically significantly higher in the DLG group (p=0.005). Postoperative air bone gap was 11.40 (±8.61) dB in DLG and 12.95 (±10.88) dB in SLG and there was no statistically significant difference in hearing gain between the groups. GSR was 99/103 (96.1%) in the DLG group and 103/108 (95.4%) in the SLG group with no difference between the groups (p=0.679) CONCLUSION: We concluded that DLG is not superior to SLG in terms of both hearing and GSR, and may even be disadvantageous in terms of hearing, and this should be taken into consideration in patient selection.

Double layer graft technique for horizontal alveolar ridge augmentation with staged implant placement: radiographic histological and implant stability analysis–a case report

IntroductionHorizontal ridge augmentation of a deficient alveolar bone site is performed either simultaneously with implant placement or in a staged approach prior to implant insertion. There are several available strategies for the augmentation of alveolar ridge deficiencies, including guided bone regeneration (GBR) through the use of barrier membranes. The success of the GBR approach mainly depends on the exclusion of soft tissue cells during bone remodeling.Case presentationA healthy 25-year-old male patient presented with a missing upper left central incisor after clinical and radiographic examination, the site showed a class III defect horizontal atrophy. The procedure performed was the horizontal alveolar ridge augmentation using resorbable pericardium membrane with double layer graft technique (DLT) where autogenous bone placed as a first layer of the graft followed by xenograft as a second layer, the membrane was fixed with titanium pins. A cone beam computed tomography (CBCT) was performed before, immediately and 6 month following the surgery. After 6 months during implant placement, a core biopsy specimen was retrieved, stored and prepared for histological evaluation, with assessment of primary implant stability. The radiographic analysis showed a horizontal width gain of about 4 mm, at 6 month following implant placement, the implant was successfully osteointegrated with stability assessment also done after 6 months from placement.ConclusionDLT was successfully used for horizontal alveolar ridge augmentation, thus allowing a prosthetically driven implant placement. More cases assessing implant survival and success are needed to confirm the results of this case report.

Comparative Study Between Single Layer and Double Layer Graft Technique in Tympanoplasty for Subtotal Tympanic Membrane Perforation.

Introduction Tympanoplasty is the main treatment of mucosal type of chronic suppurative otitis media. Objective The aim of the present study was to compare clinical outcomes in terms of healing and audiological outcomes of two groups. The authors used single layer graft (perichondrium with cartilage island) graft in one group and double layer grafts (perichondrium cartilage island composite plus temporalis fascia) were used in the second group. Methods Forty patients complained of chronic suppurative otitis media safe type with subtotal perforation subdivided into two groups. The first group author used single-layer perichondrium with cartilage island graft (composite graft) while in the second group authors used double graft in the form of perichondrium/cartilage island (composite graft) plus temporalis fascia. Results There was no significant difference in the mean Air bone gap (ABG) between pre- and post-operative audiometry in subjects who had single layer tympanoplasty. There was a significant difference in the mean ABG between pre- and postoperative audiometry in subjects who had double layer tympanoplasty. There was a significant difference in in the mean ABG differences between subjects who had single layer tympanoplasty and double layer tympanoplasty. Also, there was a significant difference in the healing of the tympanic membrane between subjects who had single layer tympanoplasty and double layer tympanoplasty. Conclusion Tympanoplasty by double graft (temporalis fascia and tragal cartilage/perichondrium) achieved a considerable improvement in healing of the tympanic membrane ™ with lower risk for residual perforation or graft rejection.

Gilbert double layer graft method for groin hernias in patients with ascites: A retrospective study of 81 patients

BackgroundPatients with ascites undergoing an inguinal hernia repair have an increased rate of both morbidity and mortality compared with those without ascites, leading to controversy regarding the indications for herniorrhaphy in patients with ascites. The purpose of this retrospective study was to analyze the clinical results of a tension-free herniorrhaphy using the Gilbert approach in 81 patients with an inguinal hernia complicated by the presence of ascites. MethodsWe analyzed retrospectively the clinical data of 81 patients with ascites who underwent a tension-free hernia repair between November 2008 and November 2014 at the West China Hospital of Sichuan University. The underlay patch of the mesh device was spread to cover the entire posterior surface of the myopectineal orifice, while the onlay patch of the device was placed anterior to the transversalis fascia and fixed to the conjoint tendon and the inguinal ligament with single sutures. All patients were followed up via phone calls and outpatient examinations for 24 months until November 2016. ResultsThe operation was completed successfully in all patients. The mean operative time was 46 ± 20 minutes (range 20–255 minutes). A drain was left in the wound in 65 cases and was removed at a median of 3 days (interquartile range 2–4) after the operation. The hospital stay after the operation was 3 ± 2 days (range 1–12 days). Postoperative complications included a seroma in 9 patients, scrotal edema in 4 patients, and no wound infections. There was no recurrence of the hernia after 24 months of follow-up in any patient. ConclusionThe Gilbert, double-layer, tension-free herniorrhaphy, according to the principles of the Gilbert operation, is both feasible and safe for selected patients with a symptomatic inguinal hernia who also have ascites.

The Alignment of the Nose in Rhinoplasty: Fix Down Concept.

The current literature on rhinoplasty focuses mainly on the nasal profile (sagittal plane); however, the nose is a three-dimensional structure, and alignment of the nose in consideration of other aspects is important to achieve an aesthetic result. The author aimed to introduce the fix down concept, which includes fix down technique and the adjunct maneuvers for achieving alignment of the nose in three anatomical planes and improving the results of rhinoplasty in terms of symmetry. Between March of 2017 and December of 2017, a total of 102 patients (78 women and 24 men), 13 revision and 89 primary cases, underwent septorhinoplasty with the fix down concept. The noses were evaluated in coronal, sagittal, and axial planes and classified according to their deformities. The functional and aesthetic results were satisfactory for the patients, examiners, and surgeon. No revisions were necessary during the follow-up period. In addition to the fix down technique, ethmoid bone grafting (16 patients), fix up technique (eight patients), dissection of the levator labii superioris alaeque nasi muscle (14 patients), plication of this muscle (four patients), superior-based transposition flap (39 patients), rim grafts (17 patients), mucosa grafts (12 patients), double-layer grafts (nine patients), maxillary deepening (five patients), maxillary augmentation with cartilage/bone grafts (21 patients), and supratip onlay grafts (seven patients) were used as adjunctive maneuvers to achieve symmetry in the frontal, base, and profile views. The presented fix down concept will help to provide three-dimensional symmetric noses for rhinosurgeons. Therapeutic, IV.

Double-Layer Tympanic Membrane Graft in Type I Tympanoplasty.

Some discussion remains among otologists regarding the best grafts for tympanic membrane closure. It is unclear whether double-layer grafts are superior to single-layer and whether single-layer cartilage is superior to fascia or perichondrium alone. The objective of the current study was to examine the relative efficacy of single-layer versus double-layer tympanic membrane grafting techniques. A retrospective review of the medical records was used to address the objective of the study. Patients operated on in an over/under technique by the same surgeon underwent single-layer perichondrium or single-layer perichondrium with a cartilage island, or a double-layer of perichondrium combined with periochondrium with a cartilage island. The outcomes assessed were tympanic membrane reperforation and hearing improvement. A total of 135/177 (76%) perichondrium grafts had no reperforation, and 43/55 (78%) perichondrium with cartilage island grafts had no reperforation; 352/390 (90%) of the double-layer closures had no reperforation. There was no statistically significant difference in reperforation rates between the 2 single-layer techniques (P = .926). The difference in reperforation rates after the double-layer closure versus the perichondrium single-layer closure was statistically significant (P = .001), as was the difference in reperforation rates after the double-layer closure versus the cartilage island single-layer closure (P = .02). All 3 groups showed statistically significant hearing improvement postoperatively (P < .0001). Preoperative hearing levels (P = .179), postoperative hearing (P = .857), and decibels of hearing improvement (P = .356) were the same for all 3 groups. Double-layer closure gives lower tympanic membrane reperforation rates than does single-layer closure, as well as similar hearing outcomes.

Comparison between clinical and audiological results of tympanoplasty with double layer graft (modified sandwich fascia) technique and single layer graft (underlay fascia and underlay cartilage) technique

IntroductionSurgical repair of the tympanic membrane, termed a type one tympanoplasty is a tried and tested treatment modality. Overlay or underlay technique of tympanoplasty is common. Sandwich Tympanoplasty is the combined overlay and underlay grafting of tympanic membrane. ObjectiveTo describe and evaluate the modified sandwich graft (mediolateral double layer graft) tympanoplasty using temporalis fascia and areolar fascia. To compare the clinical and audiological outcome of modified sandwich tympanoplasty with underlay tympanoplasty. MethodsA total of 88 patients of chronic otitis media were studied. 48 patients (Group A) underwent type one tympanoplasty with modified sandwich graft. Temporalis fascia was underlaid and the areolar fascia was overlaid. 48 patients (Group B) underwent type one tympanoplasty with underlay fascia technique. 48 patients (Group C) underwent type one tympanoplasty with underlay cartilage technique. We assessed the healing and hearing results. ResultsSuccessful graft take up was accomplished in 47 patients (97.9%) in Group A, in 40 patients (83.3%) Group B, and in 46 (95.8%) patients in Group C. The average Air-Bone gap closure achieved in Group A was 24.4±1.7dB, in Group B, it was 22.5±3.5dB and in group C, it was 19.8±2.6dB. Statistically significant difference was found in graft healing rate. Difference in hearing improvement was not statistically significant. ConclusionDouble layered graft with drum-malleus as a ‘meat’ of sandwich maintains a perfect balance between sufficient stability and adequate acoustic sensitivity.

Comparison of inguinal hernia repairs performed with lichtenstein, rutkow-robbins, and gilbert double layer graft methods.

Tension-free repairs are performed commonly in inguinal hernia operations. The objective of the present study is to compare the outcomes of three different tension-free repair methods known as Lichtenstein, Rutkow-Robbins, and Gilbert double layer. One-hundred and fifty patients diagnosed with inguinal hernia were randomly split into three groups. The comparisons across groups were carried out in terms of operation length, postoperative pain, femoral vein flow velocity, early and late complications, recurrence rates, length of hospital stay, time required to return to work, and cost analysis. No difference was found between the groups regarding age, gender, type and classification of hernia, postoperative pain, and late complications (p > 0.05). Operation length was 53.70 ± 12.32min in the Lichtenstein group, 44.29 ± 12.37min in the Rutkow-Robbins group, and 45.21 ± 14.36min in the Gilbert group (p < 0.05). Mean preoperative and postoperative femoral vein flow velocity values were 13.88 ± 2.237 and 13.42 ± 2.239cm/s for Lichtenstein group, 12.64 ± 2.98 and 12.16 ± 2.736cm/s for Rutkow-Robbins group, and 16.02 ± 3.19 and 15.52 ± 3.358cm/s for the Gilbert group, respectively. Statistical difference was found between all the groups (p < 0.001). However, no difference was determined between the groups regarding the decrease rates (p = 0.977). Among early complications, hematoma was observed in one (2%) patient of Lichtenstein group, five (10%) patients of Rutkow-Robbins group, and three (6%) patients of Gilbert group (p = 0.033). Cost analysis produced the following results for Lichtenstein, Rutkow-Robbins, and Gilbert groups: US $157.94 ± 50.05, $481.57 ± 11.32, and $501.51 ± 73.59, respectively (p < 0.001). Lichtenstein operation was found to be more advantageous compared with the other techniques in terms of cost analysis as well as having unaffected femoral blood flow. Therefore, we believe that Lichtenstein repair is still the most appropriate surgical option in patients diagnosed with inguinal hernia.