Philips Zoom Case Study

Cosmetic Treatments
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Dr Rhona Eskander: Philips Zoom Tooth Whitening Case Study


Since the introduction of nightguard vital bleaching (tray bleaching) in 1989, tooth whitening has seen a huge rise. One of the most common questions raised by dental professionals is 'What bleaching technique works best?' Well, most work because bleach is bleach.

The mechanism of action is the oxidation of organic pigments or chromogens in the tooth. Varying approaches take different amount of times, owing to differences in concentration or exposure time. The most important factors in the efficacy of any bleaching treatment are concentration of the bleaching agent and duration of the exposure time.

Case Study
This medically fit and well female who is 36 years old attended complaining of discolouration of her teeth. The patient’s history was taken and included collating her opinions regarding the cause of her tooth discoloration, her history of allergies and information regarding any past problems with tooth sensitivity.

During the discussion the patient expressed concerns about her tooth discolouration which she had experienced for over five years. The patient had an anterior open bite and two fillings on the lower teeth. Her periodontal health was adequate however she had some calculus build up. Her initial colour was recorded on the vita shade guide and was A3.

The vita shade guide allows measurement of the shades of the teeth by a subjective visual method, (Vitapan Classical, Vita Zahnfabrik, Bad Säckingen, Germany) which builds incrementally through 6 different shades. This allows us to make a comparison of the colour of the teeth before and after whitening.

Philips Zoom is the number one tooth whitening brand recommended by dentists worldwide. Patients can chose between in-clinic whitening and award winning DayWhite/NiteWhite home tooth whitening, all of which achieve clinically proven results. Its light activated chairside whitening system achieves fast and impressive results while the patient is in the practice: up to 7 shades in 60 minutes [1].

This is because Philips Zoom WhiteSpeed uses a special LED light to accelerate the whitening process for maximum results in minimal time. In clinic and at home together provide the gold standard in tooth whitening.

The take home system uses special whitening trays which are created to fit snugly over the teeth. Into these the special Zoom whitening gel is dotted and the trays are worn either in the day or at night, for a prescribed number of hours to suit your patient’s lifestyle.

Maximum results are achieved within 7-14 days however your patient’s teeth will be significantly whiter in as little as three days. The whitening gels in all Zoom products also provide the best sensitivity control and enamel protection thanks to their unique Amorphous Calcium Phosphate formulae – which is a desensitizing agent.

Carbamide peroxide is the most commonly used whitening agent due to its effectiveness, speed and minimal side effects, while achieving desirable results. Side effects include tooth hypersentivity, gingival irritation, tooth surface roughening and softening or degradation of marginal sealing of composite restorations.

The patient chose Zoom DayWhite for her convenience, as her job sometimes required her to work nightshifts. Polyvinysilicone impressions were taken to make her bespoke tooth whitening trays. The trays were given to the patient a few days later along with a Zoom DayWhite system kit. The patient was shown how to place the gel in the trays; and this was reinforced by showing her a demonstration video.

The patient was instructed to place the gel in the trays twice a day, and wear them every day for 30 minutes each time. Only the upper tray was given at this point, to allow a direct comparison of the effectiveness of the whitening system. After two weeks the patient was reviewed, as you can see the colour of the patient’s teeth changed dramatically. At this stage the lower tray was given to the patient and she was instructed to do the same with the lower teeth. The results were excellent - the patient achieved shade B1 on the vita shade guide.

The patient was advised that to extend the longevity of newly whitened teeth she should do the following:
• At-home follow-up or maintenance whitening – implemented immediately or performed as infrequently as once a year.
• Avoid dark-coloured foods and beverages for at least a week after whitening.
• Whenever possible, sip dark-coloured beverages with a straw.
• Practice excellent oral hygiene – brushing and flossing after meals and at bedtime.

Professionally dispensed take-home whitening kits can produce the best results over the long haul. Take-home kits incorporate an easy-to-use lower-concentration peroxide gel that remains on the teeth for an hour or longer.


Dr Rhona Eskander is a multi-award winning dentist based in Chelsea, London. She specialises in cosmetic procedures and has treated some of the best-known celebrities from stage and screen. To find out more visit 


1]. Comparison of the Tooth Shade Reduction and Color Change Effects of 6% Hydrogen Peroxide with and without Philips Zoom WhiteSpeed LED Acceleration Followed with Use of Philips Zoom NiteWhite 16% Carbamide Peroxide Ontiveros J, Eldiwany M, Arriage D, Fay R, Sanchez N, Paravina R, Gonzalez M, Sly M, Mirza F, Ward M University of Texas Health Science Center School of Dentistry; Houston, TX, USA

2]. Haywood VB, Leonard RH, Dickinson, GL. Efficacy of six months of nightguard vital bleaching of tetracycline-stained teeth. J Esthet Dent 1997; 9: 13–19. | Article | PubMed | ChemPort |

3]. Leonard RH, Haywood VB, Caplan DJ, Tart ND. Nightguard vital bleaching of tetracycline-stained teeth: 90 months post treatment. J Esthet Rest Dent 2003; 15: 142–153.

4]. Shethri SA, Matis BA, Cochran MA, Zekonis R, Stropes M. A clinical evaluation of two in-office bleaching products. Oper Dent 2003; 28: 488–495. | PubMed |

5]. Tam, L. Effect of potassium nitrate and fluoride on carbamide peroxide bleaching. Quint Int. 2001; 32: 766–770. | ISI | ChemPort |

6]. Professor and Graduate Program Director, Department of Operative Dentistry, School of Dentistry, University of North Carolina at Chapel Hill, NC, USA.