PDO Deep Tissue Thread-Lift With Inferior-to-Superior Insertion
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Solution Overview
Problem
Conventional thread lifting procedures using PDO threads are limited by invasive insertion methods that target superficial fat pads, leading to potential complications and unsatisfactory aesthetic outcomes, particularly in addressing deep tissue ptosis and facial volume loss.
Innovation Solution
A novel thread lifting technique involving inferior-to-superior insertion of multidirectional PDO threads into deep fat pads, such as the buccal and sub-orbicularis oculi fat, using L-shaped cannulas and specific anatomical markings to achieve lift and contouring effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional superior-to-inferior thread insertion method is used, then the procedure is simpler to perform, but the aesthetic outcome is unsatisfactory and complications increase
Solution Approach 1:
The patent inverts the conventional insertion direction from superior-to-inferior to inferior-to-superior. This reversal allows the thread to be inserted through the deep fat pad from below, enabling the barbed portion to effectively engage and lift the sagging tissue while reducing damage to superficial structures, thereby improving aesthetic outcomes and reducing complications.
Solution Approach 2:
The patent introduces a new spatial dimension by targeting the deep fat pad layer rather than the superficial subcutaneous layer. The L-shaped cannula enables access to this deeper plane, allowing thread insertion at a different anatomical level where the lifting mechanism can more effectively address deep tissue ptosis without compromising superficial tissue integrity.
2Reliability
If threads are inserted in superficial fat pads, then the insertion is easier, but deep tissue ptosis cannot be effectively addressed
Solution Approach 1:
The patent employs preliminary marking of anatomical landmarks (nasolabial fold, submalar contour, gonial angle) and pilot hole creation before thread insertion. This preparatory action guides the L-shaped cannula to the precise deep fat pad location, making the complex deep tissue insertion more manageable and effective while ensuring accurate placement for addressing deep tissue ptosis.
Solution Approach 2:
The L-shaped cannula serves as an intermediary tool that facilitates access to the deep fat pad. Its unique geometry allows it to navigate through tissue planes and deposit the thread at the target depth, bridging the gap between superficial insertion points and deep tissue targets, thereby enabling effective deep tissue lifting without direct deep dissection.
3Strength
If nonabsorbable polypropylene threads are used, then the lifting effect is stronger, but complications increase due to nonabsorbable nature
Solution Approach 1:
The patent changes the material parameter from nonabsorbable polypropylene to absorbable polydioxanone (PDO). This parameter change maintains sufficient lifting strength during the critical early period while eliminating long-term complications associated with permanent foreign bodies. The absorbable nature of PDO allows gradual degradation after the lifting effect is achieved, reducing risks of infection, extrusion, and chronic inflammation.
Solution Approach 2:
The patent utilizes the temporary presence of the PDO thread, which serves its lifting function and then naturally degrades and is absorbed by the body. This discarding mechanism eliminates the need for removal surgery and reduces long-term complications, while the controlled absorption timeline ensures adequate support duration for tissue remodeling and lifting effect maintenance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The technique effectively repositions deep fat pads, enhances facial curves, improves infraorbital hollowing, and slims the lower face by mimicking facial ligaments, providing structural support and achieving a more natural aesthetic without invasive scarring.
Implementation Method 1
A novel thread lifting technique involving inferior-to-superior insertion of multidirectional PDO threads into deep fat pads, such as the buccal and sub-orbicularis oculi fat, using L-shaped cannulas and specific anatomical markings to achieve lift and contouring effects
Implementation Method 2
Barbs along the thread act as cogs to grasp, lift, and support the facial tissue. The barbs open like an umbrella when pulled to form a support structure that lifts sagging tissue. This creates tension in the thread, and the tension lifts the skin tissue.
Implementation Method 3
This creates tension in the thread, and the tension lifts the skin tissue
Implementation Method 4
PDO is degraded by hydrolysis and is completely metabolized in the body. Due to its relatively prolonged absorption duration (182-238 days), PDO is widely used where a long-lasting absorbable material is desirable.
Data Source
AI summary
A thread-lifting surgical procedure employs an inferior-to-superior method of thread insertion through one or more deep cheek tissue pads, which angles the deep cheek tissue fat pads upward and inward. An inferior-to-superior method of thread insertion is also used for gonial angle insertion vectors through the superficial fat pads. A method for marking the patient prior to performing the thread-lifting surgical procedure is also provided. A computer and computerized method are disclosed for automated planning, execution and display of the present invention.