Short implants: an alternative to bone augmentation
Short implants are an important option for patients with bone loss who would otherwise need complex bone augmentation, or who have been told they are not candidates for dental implants. At about 4 to 8 mm long, short implants can work around anatomical limits such as the mandibular nerve or the maxillary sinus.
| Jawbone situation | Option usually considered |
|---|---|
| Enough bone | Standard implant |
| Limited bone | Short implant, or a bone graft and a standard implant |
| Extensive bone loss | Bone augmentation, or a sinus lift in the upper jaw |
Suitability is decided for each patient after an examination and 3D imaging.
The main advantage of short implants is that they reduce the need for additional surgery. For patients with reduced bone, whether from natural resorption, gum disease or long-standing tooth loss, they provide a well-studied alternative. At a consultation at Dr Haim Aseriel's clinic in Jerusalem, held in English if you wish, a personal treatment plan is drawn up.
When are short implants a good option?
Short implants suit a range of clinical situations where the bone height available for an implant is limited.
Upper jaw
With advanced bone loss in the upper jaw, when the floor of the maxillary sinus is low, short implants may allow implant placement without a sinus lift.
Lower jaw
In the lower jaw, when the mandibular nerve canal is close, short implants keep a distance from the nerve and so reduce the risk of nerve injury.
Good candidates include patients with significant bone resorption, patients who want to avoid complex bone grafting, and patients whose medical condition makes long procedures difficult. Strategically placed short implants can also be part of full mouth dental implants.
Short dental implants vs standard implants
Short implants are designed with features that partly compensate for their shorter length, such as a rough surface and a wider diameter that increases the contact area with the bone.
| Criterion | Standard implants | Short implants |
|---|---|---|
| Length | Usually 10 mm or more | About 4 to 8 mm |
| Surgery | Sometimes require bone augmentation, a sinus lift or other additional surgery | A more limited intervention, with fewer complications |
| Clinical results | Similar results over the first five years in suitable cases (systematic reviews) | |
Systematic reviews of controlled trials found that over the first five years, short implants achieve results similar to standard implants placed after bone augmentation, in the upper jaw (Grunau & Terheyden, International Journal of Oral and Maxillofacial Surgery, 2023) and in the lower jaw (Terheyden et al., International Journal of Oral and Maxillofacial Surgery, 2021), with fewer complications. Beyond 5 years, a non-significant trend in favor of standard implants was found in the upper jaw, so longer follow-up is needed. Prosthetic planning with short implants also requires attention to the crown-to-implant ratio and the distribution of biting forces. Because fewer additional procedures are needed, the overall dental implant cost may be lower with short implants.
The level of evidence differs between options for patients with bone loss: short implants have been studied in many controlled trials and systematic reviews, including a Cochrane review comparing them with sinus lifts (Esposito et al., Cochrane, 2014), whereas basal implants have fewer controlled and long-term studies. It is worth asking your dentist about the evidence behind each option.
Benefits and limitations of short implants
- Benefit: less surgery. A short implant may avoid a bone graft or a sinus lift and, according to systematic reviews, involves fewer complications over the first five years.
- Limitation: solid evidence up to five years only. Controlled trials mostly follow patients for up to five years, and longer follow-up is needed.
- Limitation: the upper jaw. After 5 years, a non-significant trend in favor of standard implants was found in the upper jaw (Grunau & Terheyden, 2023).
- Limitation: not for every case. With very poor bone quality or an unfavorable crown-to-implant ratio, a short implant is not always the preferred option, and prosthetic planning must pay attention to how biting forces are distributed.
Who places short dental implants?
Planning short implants combines surgical and prosthetic considerations: 3D CT imaging, assessment of bone quality and quantity, the bite and the expected loading. At the clinic, the implants (MIS) are placed by Dr Haim Aseriel, a dentist and graduate of NYU College of Dentistry, who assesses each case and plans the treatment. Bone grafts and surgical cases are also performed at the clinic by Dr Yves Weinberg, head of the Oral and Maxillofacial Surgery Department at Barzilai Medical Center.
Main types of short implants
The most common type is a short implant with a cylindrical or tapered design and a thread pattern meant to give good primary stability despite the limited length. Wide (wide platform) implants offer a larger surface area that partly compensates for the shorter length.
Some short implants have special surface treatments, such as hydroxyapatite coating or micro-roughening, to increase the contact area between implant and bone. In particularly complex cases of extreme upper-jaw bone loss, zygomatic implants, anchored in the cheekbone, may be recommended instead.
Another option: narrow implants
Narrow implants, also called "mini implants", are not a type of short implant: they are defined by their narrow diameter, not their length, and are mainly used to stabilize removable dentures. A short implant, by contrast, is defined by its length, about 4 to 8 mm, and has a standard or wide diameter.
Examination, treatment plan and price quote
detailed and personalized
During the consultation, Dr Haim Aseriel examines your teeth, explains all the options and gives you a transparent price quote, with no obligation. The clinic is at 12 HaTnufa Street, Jerusalem.
How short implants are placed
The surgical protocol for short implants is adapted to bone loss, making the most of the existing bone while avoiding vital anatomical structures.
1. Advanced imaging
A 3D CBCT scan, taken at the clinic with a Planmeca ProMax 3D, maps the available bone precisely and helps plan the best implant positions.
2. The surgery
The procedure starts with local anesthesia and preparation of the implant site. Drilling is gentle and controlled, sometimes with under-preparation, leaving a hole slightly narrower than the implant. This technique increases primary stability, an important factor for short implants. When indicated, PRF (platelet-rich fibrin) is used: a concentrate prepared from the patient's own blood in the clinic's centrifuge, intended to support healing.
3. Loading protocol
Choosing the right loading protocol is key. Often a conservative, delayed approach is chosen, after a few months, to allow full osseointegration before the final restoration. Under suitable conditions, such as high primary stability at placement, immediate or early loading may be chosen.
4. Combined with a sinus lift
When bone is still very limited, short implants can be combined with a minimal sinus lift or limited augmentation techniques. With extreme bone loss, alternatives such as basal implants are also considered, although the evidence for them is more limited.
What causes bone loss in the jaw?
Jawbone loss is a complex process influenced by biological, mechanical and pathological factors. The most common cause is resorption after tooth extraction, which happens because the bone no longer receives the stimulation of natural teeth. According to a systematic review, within six months of an extraction the bone ridge loses about 29% to 63% of its width and 11% to 22% of its height, with most of the change in the first three to six months (Tan et al., Clinical Oral Implants Research, 2012).
Advanced gum disease (periodontitis) is another major cause of bone loss: chronic inflammation gradually destroys the tissues supporting the teeth, including the alveolar bone. Cysts and tumors of the jaws can also destroy bone locally.
Systemic factors affect bone density and quality too: osteoporosis, hormonal disorders such as hyperparathyroidism, and vitamin D deficiency can all reduce mineralization. Smoking and heavy alcohol use also impair bone metabolism and slow healing.
Recovery after short dental implants
Healing of short implants requires close follow-up and careful adherence to post-operative instructions, because of their less favorable ratio of load to surface area. In the first week, swelling, mild pain and minor bruising are normal and usually pass within a few days.
01
Osseointegration
Osseointegration of short implants usually takes a few months, depending on bone quality and individual conditions. Early loading should be avoided during this period, especially in the upper jaw, where the bone tends to be less dense.
02
Clinical and X-ray check
After initial healing, a clinical and X-ray assessment confirms integration before the restoration stage. When several short implants are joined in one restoration (splinted), the forces are shared between them, which is meant to help preserve the bone around them.
03
Maintenance plan
Long-term success requires a personalized maintenance plan: check-ups at a frequency set by your dentist according to your risk, good oral hygiene and, in some cases, a night guard to protect against overload from teeth grinding.
Short dental implants in Jerusalem: consultation at Dr Haim Aseriel's clinic
At the consultation, your jawbone is assessed with 3D imaging (CT) to see whether short implants suit your case, and a detailed plan is drawn up covering every step through to implant uncovering and the final restoration, with a timeline and a written quote. The clinic is at 12 HaTnufa Street in Talpiot, south Jerusalem, open Sun 8:00–19:00 · Mon 9:00–19:00 · Tue–Wed 9:00–21:00 · Thu 8:30–21:00 · Fri 8:00–14:00. You can also read patient reviews.
Short dental implants: frequently asked questions
Short dental implants are suitable when the bone height available for an implant is limited: in the upper jaw, when the sinus floor is low, they may avoid a sinus lift; in the lower jaw, when the nerve canal is close, they keep a safe distance from it. Suitability is determined by 3D imaging, bone quality and the restoration plan.
The main difference between short and standard implants is length: short implants are about 4 to 8 mm long, while standard implants are longer, usually 10 mm or more. According to systematic reviews of controlled trials, over the first five years results are similar to those of standard implants placed after bone augmentation, with fewer complications.
Short implants come mainly in cylindrical or tapered designs, in standard or wide diameter (wide platform). A wide implant increases the contact area with the bone and partly compensates for the shorter length. They usually have a rough surface designed to improve integration with the bone.
According to systematic reviews of controlled trials, including a Cochrane review comparing short implants with sinus lifts, over the first five years a short implant achieves results similar to a standard implant placed after bone augmentation, with fewer complications. Beyond five years data are limited, and in the upper jaw a non-significant trend in favor of standard implants was found after 5 years.
Jawbone loss is mainly caused by bone resorption after tooth extraction: according to a systematic review, the width of the bone ridge shrinks by about 29% to 63% within six months of an extraction. Advanced gum disease (periodontitis), cysts, trauma and general bone diseases are other causes.
After short implant placement, swelling, mild pain and minor bruising are common in the first week and usually pass within a few days. Osseointegration takes a few months, depending on bone quality and the patient's condition, and only then is the final restoration fitted.
Sources
- Grunau O & Terheyden H, International Journal of Oral and Maxillofacial Surgery, 2023 – Link to study
- Terheyden H et al., International Journal of Oral and Maxillofacial Surgery, 2021 – Link to study
- Esposito M et al., Cochrane Database of Systematic Reviews, 2014 – Link to study
- Tan WL et al., Clinical Oral Implants Research, 2012 – Link to study
