Is tmj splint profitable to sell on Amazon United States?

The niche generates $118K/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -13.1%. Flapen's verdict: Skip it (45/100).

How competitive is the tmj splint niche?

5 brands and 43 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in tmj splint?

Top complaints mined from reviews: Size-Overall, Comfort-Overall, Value For Money. The return rate is 1.8%.

When does demand for tmj splint peak?

Demand peaks in Mar–Sep; the busiest month runs 5.1× the quietest.

What does it cost to enter the tmj splint niche?

Listings span $15.48–$57.13; the average listing price is $27.10 (sweet spot $15–$100). The average incumbent carries 9,385 reviews — the moat a new listing must climb.

tmj splint

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Quality gap

Incredible3.8★

avg incumbent rating — lower means beatable quality

Avg price

Incredible$27.10

avg listing price — sweet spot $15–$100

Price range

Incredible$15.48–$57.13

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Great8.4%

search→purchase rate — share of searches ending in a sale

Returns

Great1.8%

return rate — above 5% kills the launch gate

Market size

Okay$118K

$118K/yr · 52K searches

Review moat

Bad9,384.75

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-13.1%

90-day search growth — must beat 0% to launch

Competition

Bad88%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals Quality Gap

According to Flapen's Amazon United States niche tracking, tmj splint is a $118K/yr Amazon United States market (52K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Mar–Sep. Verdict: Skip it — 45/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

tmj splint market data

Units sold / yr: 3K–4K; avg 250–500/product
Revenue / yr: $81K–$108K; units × avg price
Conversion rate: 8.4%
Avg BSR: #29
Page quality: 0%
Prime: 100%
Sponsored: 75%
Out of stock: 3.9%
Avg brand age: 49 months
Avg seller age: 161 days

Competition & brand share

The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

88%

Top 20: 100%

Open market

SmartGuard74%
DenTek9%
Lisa's TMJ Mouth Pillow8%
Generic5%
Plackers4%

Demand & seasonality

Weekly Amazon search volume, last 57 weeks — -13.1% search growth over the last 90 days.

Peak months: Mar, Sep · busiest ÷ quietest = 5.1×

Open Trend

Top tmj splint search terms

tmj splint15K/yr -17.8%0.8% conv.
daytime jaw clenching relief12K/yr -2.1%0.5% conv.
smart guard elite dental guard8K/yr -13.9%17.5% conv.
front teeth night guard8K/yr -11.2%6.8% conv.
smartguard elite dental guard5K/yr -19.7%19.8% conv.
smart guard3K/yr -10.8%7.2% conv.
smartguard2K/yr -17.0%8.6% conv.

All search terms

Top tmj splint products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Dental Guard SMARTGUARD Elite (2 Guards 1 Travel case) Front Tooth Custom Anti Teeth Grinding Night Guard for Clenching - Dentist Designed - Bruxing Splint Mouth Protector for Relief of Symptoms

SmartGuard$23.203.8★3,149 rev

Lisas TMJ Mouth Pillow Relaxes Your jaw Muscles and eases Your jaw Pain by Providing a Place to Rest Your jaw in the Optimal Neutral Position Settling Down Overworked jaw Muscles to Ease jaw Pain

Lisa's TMJ Mouth Pillow$19.743.5★50 rev

DenTek Professional-Fit Dental Guard Mouth Guard for Grinding Teeth at Night 1 Count

DenTek$15.483.9★23,418 rev

SmartGuard Dental Guard Night Guard for Clenching Bruxism and Grinding Dentist Designed Includes 2 Guards 1 Travel Case and a 60-Day Supply of Premium Cleaning Crystals

SmartGuard$35.883.8★3,149 rev

SmartGuard Anti Snore Device. New Customizable Snore Reducing Mouthpiece Reduce Snoring Aid for Men and Women Most Comfortable and Adjustable Oral Appliance - Holds Jaw Forward to Open Airway

SmartGuard$57.133.3★1,452 rev

Newest

by launch date

Lisas TMJ Mouth Pillow Relaxes Your jaw Muscles and eases Your jaw Pain by Providing a Place to Rest Your jaw in the Optimal Neutral Position Settling Down Overworked jaw Muscles to Ease jaw Pain

Lisa's TMJ Mouth Pillow$19.7450 rev

11mo ago

SmartGuard Anti Snore Device. New Customizable Snore Reducing Mouthpiece Reduce Snoring Aid for Men and Women Most Comfortable and Adjustable Oral Appliance - Holds Jaw Forward to Open Airway

SmartGuard$57.131,452 rev

3y ago

Dentists Choice Dental Guard - Best Oral Appliance for Bruxism Clenching - Nighttime Moldable Front Tooth Custom Anti Teeth Grinding Night Protector - Professional Slim-fit Bruxing Mouth Bite Splint

Generic$20.03395 rev

4y ago

Plackers Grind No More Night Guard Nighttime Protection for Teeth BPA Free Sleep Well Ready to Wear Disposable One Size Fits All 16 Count

Plackers$19.6534,109 rev

7y ago

SmartGuard Dental Guard Night Guard for Clenching Bruxism and Grinding Dentist Designed Includes 2 Guards 1 Travel Case and a 60-Day Supply of Premium Cleaning Crystals

SmartGuard$35.883,149 rev

8y ago

What buyers say about tmj splint

What buyers praise and complain about, mined from review topics.

What buyers love

Comfort-Overall13%

“They are extremely comfortable”

Quality-Overall10%

“Excellent Product”

Size-Overall10%

“Easy to fit”

Ease Of Use9%

“The process is easy”

Value For Money8%

“Worth it”

Instructions/User Manual/Troubleshooting5%

“Excellent instructions”

Tooth Sensitivity5%

“Good for teeth”

Efficiency4%

“this one is simple and effective”

Advertised Vs Actual Product3%

“As advertised”

Durability3%

“Durable”

What buyers complain about

Size-Overall21%

“Awkward fit”

Comfort-Overall9%

“Bulky and uncomfortable”

Value For Money8%

“definitely not worth the price”

Functionality-Overall8%

“Never worked”

Durability8%

“Bad durability”

Quality-Overall6%

“the build quality is very poor”

Thickness4%

“Very thick and bulky”

Ease Of Use3%

“Not easy”

Instructions/User Manual/Troubleshooting2%

“The instructions are unclear”

Hard Feel2%

“also biting hard”

Top return reasons

Size-Overall39%

Functionality-Overall14%

Comfort-Overall10%

Advertised Vs Actual Product10%

Product Condition4%

Material Quality4%

Defective Material/Parts4%

Shape/Style2%