# US 10,864,000 B2 · Memory elastic wire sleeve for peeling maxillary sinus membrane

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- Number: US 10,864,000 B2
- Document ID: US10864000B2
- Status: Granted
- Kind: B2
- Application number: 15/755,992
- Filed: 2015-09-17
- Published: 2018-07-12
- Granted: 2020-12-15
- Earliest claimed: 2015-08-31
- Assignees: Yanfeng Li
- Applicants: Yanfeng Li
- Inventors: Yanfeng Li
- Web page: https://patentgrep.com/patent/US10864000B2

## CPC

- A61B 17/24: for use in the oral cavity, larynx, bronchial passages or nose (for medical inspection of cavities or tubes in the body A61B1/00); Tongue scrapers
- A61B 17/3211: Surgical scalpels, knives; Accessories therefor
- A61C 8/0006: {Periodontal tissue or bone regeneration (support means for endoprosthetic bone substitute or bone graft implants A61F2/2846)}
- A61C 8/0092: {for sinus lifting}
- A61C 2201/007: using shape memory effect
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)

## Abstract

A memory elastic wire sleeve for peeling maxillary sinus mucous membrane is adapted for implant surgeries and/or bone grafting in the regions close to the maxillary sinus floor. The memory elastic wire sleeve includes a primary peeling structure and a secondary peeling structure, wherein the primary peeling structure comprises a hollow sleeve and a peeling edge located on the top of the hollow sleeve, and can peel the maxillary sinus mucous membrane preliminarily, and the second peeling structure is a memory elastic wire which can further peel the maxillary sinus mucous membrane. The memory elastic wire sleeve is simple and dainty, and can safely and effectively peel away the maxillary sinus mucous membrane within a large range.

## Claims

### Claim 1

A cannula with memory elastic filament for stripping away sinus mucosa, comprising:
a primary stripping structure: and
a secondary stripping structure,
wherein said primary stripping structure comprises a hollow cannula and a stripping edge, the stripping edge connected on and fixed to a top of the hollow cannula,
wherein said secondary stripping structure comprises an elastic filament,
wherein, said elastic filament is made of a shape memory material with elasticity,
wherein said elastic filament is folded into double strands and positioned in said hollow cannula, an upper end of said elastic filament extends out from the top of said hollow cannula, and two strands of a lower end of said elastic filament extend out of a bottom of said hollow cannula,
wherein the two strands of the lower end of said elastic filament are separated with each other and can be controlled separately,
wherein the shape of said stripping edge is an arc and the elastic filament is bent downward by said stripping edge when the elastic filament extends out of the hollow cannula, and
wherein the upper end of said elastic filament that extends beyond said hollow cannula is variable in size, extension direction and shape by adjusting the two strands of the lower end of said elastic filament.

### Claim 2 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein the elastic filament is machined to have a shape suitable for stripping away mucosa from the maxillary sinus floor.

### Claim 3 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein the upper end of said elastic filament that extends beyond the hollow cannula is of irregular circle shape.

### Claim 4 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein the upper end of the elastic filament is controlled to be hidden under the stripping edge.

### Claim 5 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein one end of said hollow cannula has a holding part and has a stop plug; and
wherein the hollow cannula or the elastic filament is marked with a scale.

### Claim 6 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein the elastic filament is made of a nonmetal or a metal alloy.

### Claim 7 (depends on 1)

The cannula with memory elastic filament of claim 1, wherein the hollow cannula has a diameter of 1-4 mm, the elastic filament has a diameter of 0.3-0.6 mm, and the stripping edge has a length of 1-5 mm.