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Indicators02:39

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Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
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Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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Related Experiment Video

Updated: Jan 31, 2026

A Novel Arthroscopic Medial Knot-Tying Suture-Bridge Repair with Rip-Stop Technique for Rotator Cuff Tears
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Meniscal repair: indications and techniques.

Kimberly A Turman1, David R Diduch

  • 1Department of Orthopaedic Surgery, Sports Medicine Division, University of Virginia, 400 Ray C. Hunt Drive, Charlottesville, VA 22903-0159, USA.

The Journal of Knee Surgery
|May 27, 2008
PubMed
Summary
This summary is machine-generated.

Meniscal repair aims to preserve knee joint tissue, but suitability varies. Concurrent anterior cruciate ligament (ACL) reconstruction enhances meniscal healing, influencing repair techniques and indications.

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Area of Science:

  • Orthopedic surgery
  • Knee joint biomechanics
  • Sports medicine

Background:

  • Meniscal tears are common knee injuries.
  • The meniscus is crucial for knee joint function and stability.
  • Preserving meniscal tissue via repair is preferred over meniscectomy.

Purpose of the Study:

  • To review the indications and techniques for meniscal repair.
  • To highlight the impact of concurrent anterior cruciate ligament (ACL) reconstruction on meniscal healing.
  • To discuss the evolution of meniscal repair methods.

Main Methods:

  • Review of current literature on meniscal repair techniques.
  • Analysis of factors influencing meniscal healing.
  • Comparison of different meniscal repair approaches (open, inside-out, outside-in, all-inside).

Main Results:

  • Meniscal healing is significantly enhanced when performed with anterior cruciate ligament (ACL) reconstruction.
  • Inside-out vertical mattress suture repair is considered the gold standard.
  • All-inside repair devices are best suited for specific situations, like concurrent ACL reconstruction.

Conclusions:

  • Meniscal repair is ideal for preserving knee function, but careful assessment of tear suitability is essential.
  • Concurrent ACL reconstruction positively impacts meniscal healing, broadening repair indications.
  • Surgical techniques for meniscal repair have advanced, with inside-out repairs remaining the primary method.