• 제목/요약/키워드: root coverage

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Clinical and patient-reported outcomes after recession coverage using modified vestibular incision subperiosteal tunnel access with a volume-stable collagen matrix as compared to a coronally advanced flap with a subepithelial connective tissue graft

  • Chun-Teh Lee;Marlena Lange;Alain Jureidini;Nurit Bittner;Ulrike Schulze-Spate
    • Journal of Periodontal and Implant Science
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    • 제52권6호
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    • pp.466-478
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    • 2022

  • Purpose: Coronally advanced split-or full-thickness (CAST or CAFT) flaps in combination with subepithelial connective tissue grafts (SCTGs) are commonly used in root-coverage procedures despite postoperative pain and bleeding from the graft donor site. Therefore, the modified vestibular incision subperiosteal tunnel access procedure (VISTAX) uses a novel collagen matrix (VCMX) instead of autogenous tissue to address the limitations associated with autogenous tissue grafting. This retrospective study compared the clinical outcomes of VISTAX to the results obtained after using a CAST or CAFT flap in combination with SCTG for root coverage. Methods: Patients with single or multiple adjacent recession I/II defects were included, with 10 subjects each in the VISTAX, CAFT, and CAST groups. Defect coverage, keratinized tissue width, esthetic scores, and patients' perceived pain and dentinal hypersensitivity (visual analogue scale [VAS]) were assessed at baseline, 3 months, and 6 months. Results: All surgical techniques significantly reduced gingival recession (P<0.0001). Defect coverage, esthetic appearance, and the reduction in dentinal hypersensitivity were comparable. However, the VAS scores for pain were significantly lower in the VISTAX group than in the CAFT and CAST groups, which had similar scores (P<0.05). Furthermore, the clinical results of VISTAX and CAFT/CAST generally remained stable at 6 months. Conclusions: The clinical outcomes of VISTAX, CAFT, and CAST were comparable. However, patients perceived significantly less pain after VISTAX, indicating a potentially higher patient acceptance of the procedure. A prospective trial with a longer follow-up period and a larger sample size should therefore evaluate VISTAX further.

  • https://doi.org/10.5051/jpis.2105760288 인용 PDF KSCI

병렬 테스트 방법을 적용한 고집적 SRAM을 위한 내장된 자체 테스트 기법 (Built-in self test for high density SRAMs using parallel test methodology)

  • 강용석;이종철;강성호
    • 전자공학회논문지C
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    • 제35C권8호
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    • pp.10-22
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    • 1998

  • To handle the density increase of SRAMs, a new parallel testing methodology based on built-in self test (BIST) is developed, which allows to access multiple cells simultaneously. The main idea is that a march algorithm is dperformed concurently in each baisc marching block hwich makes up whole memory cell array. The new parallel access method is very efficient in speed and reuqires a very thny hardware overhead for BIST circuitry. Results show that the fault coverage of the applied march algorithm can be achieved with a lower complexity order. This new paralle testing algorithm tests an .root.n *.root.n SRAM which consists of .root.k * .root.k basic marching blocks in O(5*.root.k*(.root.k+.root.k)) test sequence.

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