
Dr Anupam Sinha
BDS, MDS - Orthodontics
- Delhi State Dental Council registration number A-6723 (2015).
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All-on-4 dental implants · Greater Kailash 1, Delhi
Orion Dental Clinic is a dentist in Greater Kailash 1 (GK 1), South Delhi. All-on-4 is a way of replacing the teeth in one jaw with a fixed set of teeth that rests on four implants, instead of one implant for every tooth. This page explains how it works, who it may suit, how long it takes, how recovery goes and what the research does and does not show, in plain language, so that you can decide with confidence.
Treatment is planned by Dr Anupam Sinha (BDS, MDS) and Dr Natalia DeSilva (BDS, MDS). For the wider picture, read our guide to full mouth dental implants. Ask as many questions as you need before you decide.
These figures come from a systematic review of the all-on-four concept and from NHS hospital leaflets, listed at the end of the page. The review's authors say the evidence is limited. Your dentist will give the timeline for your own mouth.
Medically reviewed by Dr Anupam Sinha, BDS, MDS - Orthodontics, .
Quick answer
All-on-4 at Orion Dental Clinic in Greater Kailash 1, Delhi replaces the teeth in one jaw with a fixed set held by four implants. Dr Anupam Sinha and Dr Natalia DeSilva plan each case after an examination and a 3D scan. It suits some people, not all, and the final teeth are fitted after months of healing.
01 Overview
All-on-4 is a treatment concept for a jaw that has lost most or all of its teeth. Four titanium implants are placed in the jawbone, and a full arch of fixed teeth is attached to them. The two implants at the back are often tilted, which lets them sit in the bone that is available without a bone graft in some cases. After the implants are placed, a fixed temporary set of teeth can sometimes be attached soon afterwards while the bone heals, and the final teeth follow later.1
In the research the concept is called all-on-four, and it is one design within the wider field of full mouth dental implants. A review of 24 studies describes it as a predictable way to treat a jaw with little bone in patients who prefer to avoid regenerative procedures such as bone grafts.1 The same review says the evidence is limited, because follow-up was short and many patients dropped out of the studies.
There is also a six-implant version, which spreads the load across more posts: see All-on-6. Which one suits you depends on your bone, your bite and your general health, and your dentist will explain the choice after a scan.
All-on-4 is one design among several, and the research on it is promising but limited.
02 Candidacy
All-on-4 suits some adults who have lost most or all of the teeth in a jaw, or whose remaining teeth cannot be saved. It is a major treatment, so your dentist decides after an examination and a 3D scan, and may suggest treating other problems first.3
Being a good candidate depends on how much bone you have, where it is, and your gums and general health.
03 Options
When most or all teeth in a jaw are missing there are several designs, and the number of implants is one of the main differences.
Four implants, often with the back two tilted, carry a fixed set of teeth that only the dentist can remove.
Four implants per jaw 1
Six implants carry the fixed set, which spreads the biting load over more posts and needs room for more of them.
Six implants per jaw
A fixed temporary set of teeth is sometimes fitted soon after surgery, which people call same-day teeth. Whether this suits your bone is decided after a 3D scan, and the final teeth are still made after healing. Read more about immediate implants.

| All-on-4 | All-on-6 | Overdenture | |
|---|---|---|---|
| Implants per jaw | Four | Six | Often fewer |
| Can you take it out? | No, only the dentist can | No, only the dentist can | Yes, to clean it |
| Bone needed | May suit limited bone, if the front of the jaw is sound 1 | Needs room for six posts | Depends on the design |
| Upkeep | Cleaning beneath the teeth, check-ups every three to six months 3 | The same | Daily cleaning, and worn clips replaced 3 |
Four or six implants is a decision for your dentist, based on your bone and your bite, and not a fixed rule.
04 Procedure
Every case is planned individually, so your steps may differ. This is the usual order.13
A fixed set may be attached early, but the bone still needs months to heal before the final teeth.
The dentist asks about your health and medicines, examines your mouth, gums, any remaining teeth and your current denture, and takes a 3D scan. This shows how much bone you have, where it lies and where nerves and sinuses are.
Gum disease and decay are treated first, and teeth that cannot be saved are taken out, which is tooth extraction. Removal may happen before the implants or at the same visit, depending on your plan.
The area is numbed with a local anaesthetic, and some people also have sedation. The dentist places four implants, tilting the back two where the plan calls for it, and closes the gum around them. Ask about sedation dentistry if you are anxious.
In suitable cases a fixed temporary set of teeth is attached soon after surgery. Otherwise you wear a temporary denture, which may need adjusting. You are given written care instructions and a soft food plan.
The bone bonds to the implants over about three to six months, and longer if a graft was needed.3 Review visits check the gums and the temporary teeth.
When the implants are firm, impressions are taken and the final set of fixed teeth is made to match your bite and your face. It is fitted, checked and adjusted at later visits.
NHS guidance advises monitoring every three to six months over the long term.3 Your dentist checks the gum around each implant, the bite and the teeth, and shows you how to clean beneath them.
05 Aftercare
Recovery has four phases. Your dentist will give you written instructions that fit your treatment, and those come first.
Bleeding, swelling and discomfort are common.3 Keep the area clean, eat soft, cool food, rest, and take your medicines as prescribed. Do not smoke.
Swelling and bruising settle. Stay on the soft food plan, rinse gently if you are told to, and attend your follow-up visit for stitches and a check of the temporary teeth.
The implants are bonding to the bone. Brush as normal, clean the temporary teeth as shown, keep every review visit and avoid tobacco.
Brush twice a day and clean beneath the fixed teeth with the interdental brushes or aids your dentist shows you. Attend check-ups, which NHS guidance puts at every three to six months.3
Ring the clinic on 098115 01995 the same day if the temporary teeth or a screw feel loose or break, if bleeding will not stop after 20 minutes of firm pressure, or if swelling is still growing after day three. A fever, pus, a bad taste or pain that your medicines do not control also needs a call. If you have trouble breathing or swallowing, or swelling that spreads towards your eye or neck, go to a hospital emergency department.
Follow your written instructions, keep the area clean and call early if something feels wrong.
06 Limits and risks
All-on-4 involves major surgery, and it does not suit everyone. A good dentist is willing to say no, or to wait. These are situations where your dentist may advise a different option, a delay, or advice from your other doctors:
In these cases six implants, a denture that clips onto implants, or an ordinary denture may be the better first step, or implant treatment may begin after another problem has been treated.
The evidence is limited. A review of 24 studies, covering follow-up of at least three years, reported 99.8 percent implant survival beyond 24 months. Its authors also say that the studies were small, follow-up was short and many patients were lost along the way, so the figure should be read with caution.1
The number of implants may matter. A larger review of 54 studies of fixed and removable sets estimated that 97.9 percent of upper-jaw implants and 98.9 percent of lower-jaw implants were still in place after five years. In the lower jaw, fixed sets on four implants lost more implants than fixed sets on five or more.2 That is one reason your dentist may suggest six.
The gum around an implant can become inflamed. A review of 11 studies found that on average 43 percent of patients had inflamed gum around an implant and 22 percent had the more serious form that destroys bone, with wide differences between studies.5 Inadequate cleaning can lead to long-term bone loss.3
Surgery has its own risks, and parts wear. Swelling, bruising and discomfort are common for a few days, and infection can occur. Altered feeling or numbness in the lip or chin is very rare and usually settles.3 Teeth, clips and screws can loosen or wear out and may need repair or replacement.34
A good plan names these risks before treatment starts, and a good clinic keeps checking the implants and the teeth for years afterwards.
07 Your visit
At your first visit, a dentist at Orion Dental Clinic asks about your current teeth or denture, what you find difficult, and your health, medicines and smoking. Bring any recent X-rays, your denture if you wear one, and a list of your medicines.
The dentist examines your mouth, gums and remaining teeth and takes a 3D scan of both jaws. You then hear whether the bone allows four implants in each jaw, whether a design with six would suit you better, whether temporary teeth are possible after surgery and what the risks are.
The first visit is for questions and a plan, and you can ask for a second opinion.
08 Why this clinic
You meet the doctors who plan your treatment, and you can ask them why they would choose four implants or six for your jaw.

Dr Anupam Sinha
BDS, MDS - Orthodontics

Dr Natalia DeSilva
BDS, MDS - Oral Medicine and Radiology
Dr Anupam Sinha and Dr Natalia DeSilva both treat implant patients, and past patients name both of them in their reviews.
Planning depends on a 3D scan. Imaging is available at the clinic, and Dr Natalia DeSilva has studied 3D imaging with CBCT.
People come to the clinic from other cities and countries, and Dr Natalia DeSilva also treats Russian-speaking patients.
Ask why four implants, or six, is the right plan for your jaw.
09 Reviews
4.9 out of 5 overall Google rating from 804 reviews, as of . Read more patient reviews You can also see consented before-and-after cases on our patient results page.
“I went for a consultation with Dr Natalia. I was very happy with her services. She was kind and very professional. I had multiple implants in the past and I could easily see she could handle complicated dental situations. Thank you Dr. Natalia for your help! I highly recommend Dr. Natalia as well as her dental clinic.”
graciela magnoniGoogle review
“Very professional and a great job done with my implant. I can barely feel it!”
Sejal WorahGoogle review
“Great experience overall…excellent dental care in welcoming environment…the dentists are professional, gentle and friendly. Professional service with personal touch. Highly recommended”
prabhu ahilGoogle review
10 Visit us
Mon to Sat, 9:30 am to 8:00 pm
Orion Dental Clinic Basement, E 75, Greater Kailash-1,| Monday to Saturday | 9:30 am to 8:00 pm |
|---|---|
| Sunday | Closed |
If you are looking for all-on-4 dental implants in Greater Kailash or nearby, Orion Dental Clinic is in the basement of E 75, Greater Kailash Enclave 1 (GK 1), opposite Anubhav Play School, with the entrance at Gate 1, so call or message us on WhatsApp to book an appointment and use the map for directions. More about the clinic: dentist in Greater Kailash.
11 Travelling patients
All-on-4 can bring a fixed temporary set of teeth early, but the final teeth follow only after the bone has healed over several months. For patients who live elsewhere, that usually means an evaluation, a surgery visit, healing at home and a return trip for the final teeth.13
Tell us where you live and how long you can stay in Delhi, and we will explain what a short visit can cover and what has to wait. You can read how dental tourism in Delhi works, or go to our page for international patients having dental implants.
Plan All-on-4 as a staged treatment over months, even when temporary teeth are fitted early.
12 Questions
It means a full arch of fixed teeth carried by four implants in one jaw, with the back two usually tilted so that they can use the bone that is available.1 It is also written all-on-four.
Neither suits everyone. In a review of 54 studies, lower-jaw fixed sets on four implants lost more implants than those on five or more,2 but your dentist plans from your bone and your bite, and some jaws cannot take six implants.
A review of 24 studies found 99.8 percent of implants still in place beyond 24 months, but its authors say the evidence is limited and the follow-up short.1 Over five years, a wider review estimated 97.9 percent survival in the upper jaw and 98.9 percent in the lower jaw for all fixed and removable designs.2
In suitable cases a fixed temporary set is attached soon after surgery. The bone still needs about three to six months to bond before the final teeth are made.3
The area is numbed with a local anaesthetic, and the aim is that you feel no pain during the procedure. Afterwards, swelling, bruising and discomfort are normal for a few days.3 If you are anxious, ask about sedation or read about dental anxiety.
Often yes, but the treatment is done in stages over many months. Your dentist will say which steps need you in the clinic and which can wait. Message us to plan the visits.
Orion Dental Clinic is an all-on-4 dental implants clinic in Greater Kailash 1 (GK 1), in the basement of E 75, Greater Kailash Enclave 1, opposite Anubhav Play School, with the entrance at Gate 1. Patients come for all-on-4 dental implants in Greater Kailash from Kailash Colony, CR Park, Nehru Place, Lajpat Nagar, Defence Colony and South Extension. Call or message us on WhatsApp to book an appointment.
13 Second opinion
If you have been advised to have All-on-4, or told that it is not possible, you are welcome to ask for a second opinion. Bring your X-rays, scans or reports. The doctors will examine you, explain what they find, say whether four implants, six or another option fits your bone, and describe leaving things as they are. Message us on WhatsApp or call; there is no form to fill in.
14 Related
Read this for a fixed set of teeth on six implants in one jaw.
Read this to find out what can be done on the day a tooth is removed.
Read this to compare implants with ordinary removable dentures.
Patient guides
A planning checklist for all-on-4 dental implants covering your bone, health, gums, bite, temporary teeth, healing, cleaning and the questions to ask.
What "teeth in a day" really means, what immediate loading can and cannot do, and what the evidence says about placing implants and teeth together.
What full-jaw implant surgery involves, how fixed teeth are carried on a few posts, how long it takes and what to ask before you decide.
Medically reviewed by Dr Anupam Sinha, BDS, MDS - Orthodontics, on . Dr Anupam Sinha is also a doctor at Orion Dental Clinic. Next review April 2027.
General information for patients, first published on , from the sources listed below. Updated at least every six months and not advice for any one person. Orion Dental Clinic provides this treatment, so read the risks as well as the benefits. To report an error, contact us.
This page is general information, not a diagnosis or a substitute for an examination, and results vary between patients.